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CAN COMMUNICATION SYSTEM DIAGNOSIS SYSTEM

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  1. CHECK FOR INSTALLED SYSTEMS (ECUS AND SENSORS) THAT USE CAN COMMUNICATION


    1. The systems (ECUs and sensors) that use CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs and sensors) are installed to the vehicle.


      1. GTS display and installed systems

        Tip:

        The names of ECUs and sensors shown on the GTS display may differ from those shown in DTC Table by ECU.

        Connected to Code ECU/Sensor Name GTS Display Applicability
        - CGW Central gateway ECU (network gateway ECU) - Installed on all vehicles
        - DLC3 DLC3 - Installed on all vehicles
        Bus 1 F-CAM Forward recognition camera Front Camera Module Vehicles with Toyota Safety Sense
        F-MR Millimeter wave radar sensor assembly Front Radar Vehicles with Toyota Safety Sense
        BSM Blind spot monitor sensor RH Blind Spot Monitor Master Vehicles with Blind Spot Monitor System
        R-CA Rear television camera assembly Parking Assist Monitor System / Rear Camera Vehicles with Parking Assist Monitor System
        CS Clearance warning ECU assembly Clearance Warning (Clearance Sonar) Vehicles with TOYOTA Parking Assist-sensor System
        Bus 2 ENG ECM ECM (Engine) Installed on all vehicles
        Bus 3 AV Radio and display receiver assembly Display and Navigation (AVN) Vehicles with Radio and Display Type
        Bus 4 OCS Occupant detection ECU Occupant Detection Vehicles with Occupant Classification System
        TPMS Tire pressure warning ECU and receiver Tire Pressure Vehicles with Tire Pressure Warning System
        EPS Rack and pinion power steering gear assembly Power Steering (EPS) Installed on all vehicles
        BRK Brake actuator assembly Skid Control (ABS/VSC/TRAC) Installed on all vehicles
        STR Steering sensor Spiral cable (Steering Angle Sensor) Installed on all vehicles
        SRS Airbag sensor assembly Airbag Installed on all vehicles
        Bus 5 LITS Headlight ECU sub-assembly RH HL AutoLeveling/AFS/AHS (Sub) Installed on all vehicles
        MIR-R Outer mirror control ECU assembly (for driver side) Front Door RH/R-Mirror (FR-Door/R-Mirror) Vehicles with Seat Position Memory System
        DST Position control ECU assembly RH D-Seat Vehicles with Seat Position Memory System
        MIR-L Outer mirror control ECU assembly (for front passenger side) Front Door LH/L-Mirror (FL-Door/L-Mirror) Vehicles with Seat Position Memory System
        A/C Air conditioning amplifier assembly Air Conditioning Amplifier Installed on all vehicles
        MB Main body ECU (multiplex network body ECU) Main Body Installed on all vehicles
        SMT Certification ECU (smart key ECU assembly) Certification (Smart) Vehicles with Smart Entry and Start System
        HUD Meter mirror sub-assembly Head Up Display Vehicles with Headup Display System
        LITM Headlight ECU sub-assembly LH HL AutoLeveling/AFS/AHS Installed on all vehicles
        T&T Multiplex tilt and telescopic ECU Multiplex Tilt and Telescopic Vehicles with Power Tilt and Power Telescopic System
        MET Combination meter assembly Combination Meter Installed on all vehicles
  2. Note:

    The following communication bus check screen is provided only as an example. This screen differs from the actual screen for this vehicle.

    Description of "Communication Bus Check" Screen

    Tip:

    The ECUs and sensors that are normally connected to the CAN communication system are displayed on the GTS.


    1. Select "Communication Bus Check" on the menu screen of the GTS.


      1. CAN Bus Check

      Tip:

      If items are not selected correctly in the vehicle specification pop up screen, the name of the CAN junction connector to which the ECUs or sensors are connected may not be displayed on the "Communication Bus Check" screen.

    2. Confirm that the "Communication Bus Check" screen is displayed and the ECUs and sensors that are normally connected to the CAN communication system are displayed.

      Tip:

      • Even if an ECU or sensor that is connected to a bus that is monitored by a bus monitoring ECU (gateway function equipped ECU) is not communicating, it will remain displayed on the "Communication Bus Check" screen.

      • When an ECU or sensor that is connected to a bus that is not monitored by a bus monitoring ECU (gateway function equipped ECU) is not displayed on the "Communication Bus Check" screen, it means that it is not communicating.

    3. B006XW3C01
      *a Combo box *b Background color is red or yellow

      The default display setting selected on the combo box is ALL. When checking for ECUs or sensors for a specific bus, choose the bus from the drop down list. ALL, each bus, each sub bus and Central Gateway are listed in the drop down list.

      Item Detail
      Combo box: ALL Displays all ECUs and sensors connected to the central bus and sub buses.
      Combo box: Bus Displays ECUs and sensors connected to the selected bus.
      Combo box: Sub bus Displays ECUs and sensors connected to the selected sub bus.
      Combo box: Central Gateway Displays all ECUs and sensors connected to the central bus.
      Note:

      • When using the combo box, it may be possible to select a sub bus from the drop down list that does not have any connected ECUs or sensors. This is not a malfunction and occurs when there is no optional device connected to a sub bus which is monitored by a sub bus monitoring ECU (gateway function equipped ECU).

      • In the drop down list, all sub buses applicable to the model are displayed (e.g. LIN communication sub buses are also displayed). For information on sub buses necessary to diagnose the CAN communication system, refer to System Diagram.

        Click here

      Tip:

      The background color of an ECU or sensor changes according to its connection status as indicated in the following table.

      Table 1. Description of "Communication Bus Check" Screen
      Bus Type Background Color Connection Status
      Bus White Communication has been normal.
      Yellow Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
      Red

      Currently not communicating (either of the following):


      • Not communicating since the start of the CAN bus check

      • Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
      Not displayed

      Either of the following:


      • The central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the GTS.*4

      • No ECUs or sensors are connected to the bus.*5
      Sub bus with a gateway function equipped ECU that does not memorize connected ECUs or sensors*2 White Communication has been normal since the start of the CAN bus check.
      Yellow Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
      Red Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
      Not displayed Communication stop has continued since the start of the CAN bus check.*1
      Sub bus with a gateway function equipped ECU that memorizes connected ECUs and sensors*3 White Communication has been normal.
      Yellow Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
      Red

      Currently not communicating (either of the following):


      • Not communicating since the start of the CAN bus check

      • Communication occurred at least once since the start of the CAN bus check, but is currently not occurring.
      Not displayed

      Either of the following:


      • The gateway function equipped ECU cannot communicate with the central gateway ECU.*6

      • No ECUs or sensors are connected to the sub bus.*7

      • Gateway function equipped ECUs relay signals between ECUs and sensors connected to different buses.

      • *1: An ECU or sensor is installed to the vehicle but is not displayed on the "Communication Bus Check" screen.

      • *2: The gateway function equipped ECU does not memorize ECUs and sensors connected to its respective sub bus.

      • *3: The gateway function equipped ECU memorizes ECUs and sensors connected to its respective sub bus.

      • *4: When the central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the GTS, the name of buses, sub buses, ECUs and sensors will not be displayed.

      • *5: When no ECUs or sensors are connected to a bus, the message "There is no system found on the communication Bus." will be displayed.

      • *6: When a gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU), the name of sub buses and ECUs or sensors connected to the sub bus will not be displayed.

      • *7: When no ECUs or sensors are connected to the sub bus, the message "There is no system found on the communication Bus." will be displayed.

      • If there is no communication between the GTS and the vehicle, or no ECUs or sensors are displayed as connected, check the central gateway ECU (network gateway ECU) and diagnosis bus (the bus that connects the DLC3 to the central gateway ECU (network gateway ECU)) for malfunctions.

    4. Monitor the screen for any ECU or sensor connection status changes for a period of 2 minutes.

      Tip:

      • If an open occurs in one of the wires of a CAN branch line, it may interfere with the communication of other ECUs or sensors resulting in an incorrect state being displayed.

      • If the connection status changes intermittently during the inspection, repair the open in the branch line of the ECU or sensor that is not communicating, and then perform Communication Bus Check again.

  3. Note:

    The following communication bus check screen is provided only as an example. This screen differs from the actual screen for this vehicle.

    Description of "Communication Bus Check (Detail)" Screen

    Tip:

    The communication error history of ECUs or sensors which have communication error history can be displayed on the "Communication Bus Check (Detail)" screen.


    1. Select "Communication Bus Check" on the menu screen of the GTS.


      1. CAN Bus Check

      Tip:

      If items are not selected correctly in the vehicle specification pop up screen, the name of the CAN junction connector to which the ECUs or sensors are connected may not be displayed on the "Communication Bus Check" screen.

    2. B006YJGC01
      *a Communication Bus Check (Detail) - -

      Select "Detail" on the "Communication Bus Check" screen.

    3. Confirm that the "Communication Bus Check (Detail)" screen is displayed and the communication error history of the ECUs or sensors up to present is displayed.

      Tip:

      • Lost Communication Time and Lost Communication Trip are only displayed for the central bus.

      • Lost Communication Time and Lost Communication Trip are not displayed for sub buses.

    4. B006WUOC01
      *a Combo box *b Background color is red

      The default display setting selected on the combo box is ALL. When checking for ECUs or sensors for a specific bus, choose the bus from the drop down list. ALL, each bus, each sub bus and Central Gateway are listed in the drop down list.

      Item Detail
      Combo box: ALL Displays all ECUs and sensors connected to the central bus and sub buses.
      Combo box: Bus Displays ECUs and sensors connected to the selected bus.
      Combo box: Sub bus Displays ECUs and sensors connected to the selected sub bus.
      Combo box: Central Gateway Displays all ECUs and sensors connected to the central bus.
      Bus Monitoring ECU Displays the gateway function equipped ECU which monitors the selected bus or sub bus.
      Current Trip Displays the total number of trips up to now*
      Lost Communication Time(s) Displays the longest period of time in seconds that the ECU or sensor connected to the central bus was not communicating.
      Lost Communication Trip Displays the trip in which the longest period of time that the ECU or sensor connected to the central bus was not communicating occurred.

      • *: If the component has been replaced with a new one, the total number of trips after the replacement is displayed.

      Note:

      • The Lost Communication Time column displays the longest period of time in seconds that the central gateway ECU (network gateway ECU) detected a communication stop in the respective ECU or sensor.

      • The Lost Communication Trip column displays the trip in which the central gateway ECU (network gateway ECU) detected the longest communication stop in the respective ECU or sensor.

      • When using the combo box, it may be possible to select a sub bus from the drop down list that does not have any connected ECUs or sensors. This is not a malfunction and occurs when there is no optional device connected to a sub bus which is monitored by a sub bus monitoring ECU (gateway function equipped ECU).

      • In the drop down list, all sub buses applicable to the model are displayed (e.g. LIN communication sub buses are also displayed). For information on sub buses necessary to diagnose CAN communication system, refer to the System Diagram.

        Click here

      Tip:

      The background color of an ECU or sensor changes according to its connection status as indicated in the following table.

      Table 2. Description of "Communication Bus Check (Detail)" Screen
      Bus Type Background Color Connection Status
      Bus White

      Either of the following:


      • Communication has been normal.

      • Lost Communication Time is below 6 seconds.
      Red Lost Communication Time is 6 seconds or more.
      Not displayed

      Either of the following:


      • The central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the GTS.*1

      • No ECUs or sensors are connected to the bus.*2
      Sub bus White Lost Communication Time is displayed as "-".
      Not displayed

      Either of the following:


      • The gateway function equipped ECU cannot communicate with the central gateway ECU.*3

      • No ECUs or sensors are connected to the sub bus.*4

      • If there is no communication between the GTS and the vehicle, or no ECUs or sensors are displayed as connected, check the central gateway ECU (network gateway ECU) and diagnosis bus (the bus that connects the DLC3 to the central gateway ECU (network gateway ECU)) for malfunctions.

      • Lost Communication Time and Lost Communication Trip are not displayed for sub buses.

      • *1: When the central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the GTS, the name of buses, sub buses, ECUs and sensors will not be displayed.

      • *2: When no ECUs or sensors are connected to a bus, the message "There is no system found on the communication Bus." will be displayed.

      • *3: When a gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU), the name of sub buses and ECUs or sensors connected to the sub bus will not be displayed.

      • *4: When no ECUs or sensors are connected to the sub bus, the message "There is no system found on the communication Bus." will be displayed.

  4. Communication Bus Check (Communication Malfunction Check)

    Tip:

    DTCs related to CAN communication are displayed for each ECU on the GTS.


    1. Select "Communication Bus Check" on the menu screen of the GTS.


      1. CAN Bus Check

    2. B006ZP8C01
      *a Communication Malfunction Check - -

      Select "Communication Malfunction Check" on the "Communication Bus Check" screen.

    3. Confirm that the "Communication Malfunction Check" screen is displayed and CAN communication DTCs for each ECU are displayed.

      Tip:

      When there are no CAN communication DTCs stored, no DTCs will be displayed.

  5. How to Use "Communication Bus Check" Screen in Inspection

    Note:

    The following CAN bus wiring diagram or communication bus check screen is provided only as an example. This wiring diagram or screen differs from the actual one for this vehicle.

    Tip:

    • If the CAN communication system is currently malfunctioning, it is recommended to use Communication Bus Check rather than Communication DTCs for determining the suspected area.

    • Turn the ignition switch to ON, or perform the necessary operations to reproduce the problem symptom, select "Communication Bus Check" and wait approximately 2 minutes. Check the communication status of each ECU or sensor on the screen while performing this operation.


    1. If the CAN communication system is currently malfunctioning, determine the suspected area using Communication Bus Check as follows:

      Table 3. Problem Symptoms Table
      Problem Symptom Pattern Display on Communication Bus Check Screen Suspected Area
      A Almost all of the ECUs and sensors connected to the malfunctioning CAN bus are displayed as not communicating on the "Communication Bus Check" screen.

      • Short between CAN bus lines (CANH and CANL)

      • Short to +B in a CAN bus line (CANH or CANL)

      • Short to ground in a CAN bus line (CANH or CANL)
      B ECUs or sensors farther from the central gateway ECU (network gateway ECU) than the open in the wires are displayed as not communicating on the "Communication Bus Check" screen. Open in both wires of a main bus line in the central bus
      C One ECU or sensor is displayed as not communicating on the "Communication Bus Check" screen.

      • Open in both wires of a branch line connected to an ECU or sensor in the central bus

      • Internal malfunction of an ECU or sensor in the central bus

      • Malfunction in the power supplied to an ECU or sensor in the central bus
      D No ECUs or sensors are displayed on the "Communication Bus Check" screen.

      • Internal malfunction of the central gateway ECU (network gateway ECU)

      • Malfunction in the power supplied to the central gateway ECU (network gateway ECU)

      • Open in both wires of the branch line in the diagnosis bus (DLC3 - Central gateway ECU (network gateway ECU))

      • Short between CAN bus lines (CANH and CANL) in the diagnosis bus (DLC3 - Central gateway ECU (network gateway ECU))

      • Short to +B in a CAN bus line (CANH or CANL) in the diagnosis bus (DLC3 - Central gateway ECU (network gateway ECU))

      • Short to ground in a CAN bus line (CANH or CANL) in the diagnosis bus (DLC3 - Central gateway ECU (network gateway ECU))
      E One ECU or sensor is displayed as not communicating in multiple buses on the "Communication Bus Check" screen.

      • Internal malfunction of an ECU or sensor connected to multiple buses

      • Malfunction in the power supplied to an ECU or sensor connected to multiple buses
      F Some ECUs or sensors are displayed as not communicating in the central bus and other ECUs or sensors are displayed as not communicating in a sub bus.

      • Open in a wire of a branch line connected to an ECU or sensor in the central bus

      • Internal malfunction of an ECU or sensor in the central bus
      G A gateway function equipped ECU is displayed as not communicating in the central bus and ECUs and sensors connected to its respective sub bus are not displayed.

      • Open in both wires of a branch line connected to a gateway function equipped ECU

      • Internal malfunction of a gateway function equipped ECU

      • Malfunction in the power supplied to a gateway function equipped ECU
      H One ECU or sensor is displayed as not communicating in a sub bus on the "Communication Bus Check" screen.

      • Open in both wires of a branch line connected to an ECU or sensor in a sub bus

      • Internal malfunction of an ECU or sensor in a sub bus

      • Malfunction in the power supplied to an ECU or sensor in a sub bus
      I ECUs or sensors farther from the sub bus monitoring ECU (gateway function equipped ECU) than the open in the wires are displayed as not communicating on the "Communication Bus Check" screen. Open in both wires of a main bus line in a sub bus
    2. B0071SFC01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red
      *g Not displayed - -
      B0071OJC01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red

      Problem Symptom Pattern A

      Details of Malfunction

      • Short between CAN bus lines (CANH and CANL) in Bus 2

      • Short to +B in a CAN bus line (CANH or CANL) in Bus 2

      • Short to ground in a CAN bus line (CANH or CANL) in Bus 2
      Tip:

      • Due to the malfunction, almost all of the ECUs and sensors connected to Bus 2 will be displayed as not communicating and their background color will be red.

      • The malfunction in Bus 2 will not affect the other buses.

      • The malfunctioning part can be determined by inspecting for an open in the main bus line, a short between bus lines or a short to +B or ground.

      • Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

      Details of Malfunction

      • Short between CAN bus lines (CANH and CANL) in Bus 4

      • Short to +B in a CAN bus line (CANH or CANL) in Bus 4

      • Short to ground in a CAN bus line (CANH or CANL) in Bus 4
      Tip:

      • Due to the malfunction, almost all of the ECUs and sensors connected to Bus 4 will be displayed as not communicating and their background color will be red.

      • The malfunction will not affect the other buses of the central bus. However, the sub bus connected to Bus 4 is likely to be affected. The gateway function equipped ECU connected to Bus 4 will not communicate and consequently the sub bus and its respective ECUs or sensors monitored by the gateway function equipped ECU (sub bus monitoring ECU) will not be displayed, indicating that the gateway function equipped ECU is not communicating with the central gateway ECU (network gateway ECU).

      • The malfunctioning part can be determined by inspecting for an open in the main bus line, a short between bus lines or a short to +B or ground.

      • Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

    3. B006ZI3C01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red
      *g Pattern 1 *h Pattern 2
      B006XTSC01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red
      B00709OC01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red

      Problem Symptom Pattern B

      Details of Malfunction Open in both wires of the main bus line between the CGW and No. 1 CAN junction connector in Bus 2
      Tip:

      • Due to the malfunction, almost all of the ECUs and sensors connected to Bus 2 will be displayed as not communicating and their background color will be red.

      • The malfunction in Bus 2 will not affect the other buses.

      • The malfunctioning part can be determined by inspecting for an open in the main bus line.

      • Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

      Details of Malfunction Open in both wires of the main bus line between the No. 1 CAN junction connector and No. 2 CAN junction connector in Bus 2
      Tip:

      • Due to the malfunction, ECUs or sensors farther from the CGW than the open in the wires will be displayed as not communicating and their background color will be red.

      • The malfunction in Bus 2 will not affect the other buses.

      • The malfunctioning part can be determined by inspecting for an open in the main bus line.

      • Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

      Details of Malfunction Open in both wires of the main bus line between the No. 2 CAN junction connector and ENG in Bus 2
      Tip:

      • Even when the same part of the main bus line is open, depending on internal electrical noise which changes according to the position of the open in the line, the information displayed on the "Communication Bus Check" screen may differ.

      • In pattern 2, the information displayed may be the same as when there is an open in both wires in the main bus line between the No. 1 CAN junction connector and No. 2 CAN junction connector, which may make it difficult to determine the malfunctioning part.

      • The malfunction in Bus 2 will not affect the other buses.

      • Make sure to perform the inspection to measure resistances of buses to determine the cause of the malfunction.

    4. B006WX7C01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red
      B006X94C01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red
      B006XLQC01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red

      Problem Symptom Pattern C

      Details of Malfunction Open in both wires of the branch line connected to F-MGC in Bus 2
      Tip:

      The information displayed on the "Communication Bus Check" screen will be the same for an open in both wires of a branch line, an internal malfunction of an ECU or sensor or a malfunction in the power supplied to an ECU or sensor. In this example, the background color of the malfunctioning ECU or sensor will be red.

      Details of Malfunction

      • Internal malfunction of F-MGC in Bus 2

      • Malfunction in the power supplied to F-MGC in Bus 2
      Tip:

      The information displayed on the "Communication Bus Check" screen will be the same for an open in both wires of a branch line, an internal malfunction of an ECU or sensor or a malfunction in the power supplied to an ECU or sensor. In this example, the background color of the malfunctioning ECU or sensor will be red.

      Details of Malfunction Open in both wires of the branch line connected to ENG in Bus 4
      Tip:

      • The malfunction in Bus 4 will not affect the other buses.

      • Due to the malfunction, although ENG is communicating normally with CGW via Bus 2, it is not communicating with CGW via Bus 4. Consequently, it will be displayed as not communicating in Bus 4.

    5. B00710QC01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Not displayed
      B0070OHC01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Not displayed

      Problem Symptom Pattern D

      Details of Malfunction

      • Internal malfunction of the CGW

      • Malfunction in the power supplied to the CGW
      Tip:

      When there is no communication between the GTS and the vehicle, no ECUs or sensors will be displayed.

      Details of Malfunction Open in both wires of the branch lines in the diagnosis bus
      Tip:

      When there is no communication between the GTS and the vehicle, no ECUs or sensors will be displayed.

    6. B0071PSC02
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red

      Problem Symptom Pattern E

      Details of Malfunction

      • Internal malfunction of BRK

      • Malfunction in the power supplied to BRK
      Tip:

      The information displayed on the "Communication Bus Check" screen will be the same for an internal malfunction of an ECU or sensor, or a malfunction in the power supplied to an ECU or sensor.

      Due to the malfunction, BRK is not communicating with the CGW via both Bus 2 and Bus 4. Consequently, the background color of BRK will be red for both Bus 2 and Bus 4.

    7. B006YRPC02
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red
      *g Background color intermittently becomes yellow or red *h Not displayed or background color is yellow or red

      Problem Symptom Pattern F

      Details of Malfunction

      • Open in a wire of the branch line connected to HV in Bus 4

      • Internal malfunction of HV in Bus 4
      Tip:

      • In the "Communication Bus check" screen shown in the illustration, electrical noise in the CAN bus caused by an open in a wire in the branch line connected to HV interferes with the communication of MB causing unstable communication. Also, since MB is a gateway function equipped ECU, communication of ECUs connected to its respective sub bus will also be unstable.

      • In the "Communication Bus Check" screen shown in the illustration, because the background color of HV is red, it is suspected that HV is the most likely cause of the malfunction. Therefore, it is suspected that HV is not communicating.

    8. B0071U4C01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red
      *g Not displayed - -

      Problem Symptom Pattern G

      Details of Malfunction

      • Open in both wires of the branch line connected to MB in Bus 4

      • Internal malfunction of MB in Bus 4

      • Malfunction in the power supplied to MB in Bus 4
      Tip:

      • If there is a communication malfunction in a gateway function equipped ECU, ECUs connected to its respective sub bus will also be affected and will not be displayed.

      • In the "Communication Bus Check" screen shown in the illustration, MB is a gateway function equipped ECU. Therefore, MB is suspected as not communicating.

    9. B006XMXC01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red
      B0071D1C01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red

      Problem Symptoms Pattern H

      Details of Malfunction

      • Internal malfunction of MIR-L in the sub bus

      • Malfunction in the power supplied to MIR-L in the sub bus
      Tip:

      • The malfunction in the sub bus will not affect the other buses.

      • When a gateway function equipped ECU memorizes ECUs and sensors connected to its respective sub bus and there is a communication malfunction in one of the ECUs or sensors, the background color of the ECU or sensor will change to red and the ECU or sensor will remain displayed.

      • The information displayed on the "Communication Bus Check" screen will be the same for an open in both wires of a branch line, an internal malfunction of an ECU or sensor or a malfunction in the power supplied to an ECU or sensor.

      Details of Malfunction Open in both wires of the branch line connected to MIR-L in the sub bus
      Tip:

      • The malfunction in the sub bus will not affect the other buses.

      • When a gateway function equipped ECU memorizes ECUs and sensors connected to its respective sub bus and there is a communication malfunction in one of the ECUs or sensors, the background color of the ECU or sensor will change to red and the ECU or sensor will remain displayed.

      • The information displayed on the "Communication Bus Check" screen will be the same for an open in both wires of a branch line, an internal malfunction of an ECU or sensor or a malfunction in the power supplied to an ECU or sensor.

    10. B006YYIC01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red

      Problem Symptom Pattern I

      Details of Malfunction Open in both wires of the main bus line in the sub bus
      Tip:

      Due to the malfunction, ECUs or sensors farther from the sub bus monitoring ECU (gateway function equipped ECU) than the open in the wires will be displayed as not communicating and their background color will be red.

  6. How to Use "Communication Bus check (Detail)" Screen in Inspection


    1. If the CAN communication system is currently normal but has communication stop history, determine the malfunctioning part using Communication Bus Check (Detail) as follows:

      Note:

      • The following CAN bus wiring diagram or communication bus check screen is provided only as an example. This wiring diagram or screen differs from the actual one for this vehicle.

      • The Lost Communication Time column displays the longest period of time in seconds that the central gateway ECU (network gateway ECU) detected a communication stop in the respective ECU or sensor.

      • The Lost Communication Trip column displays the trip in which the central gateway ECU (network gateway ECU) detected the longest communication stop in the respective ECU or sensor.

      • When using the combo box, it may be possible to select a sub bus from the drop down list that does not have any connected ECUs or sensors. This is not a malfunction and occurs when there is no optional device connected to a sub bus which is monitored by a sub bus monitoring ECU (gateway function equipped ECU).

      • In the drop down list, all sub buses applicable to the model are displayed (e.g. LIN communication sub buses are also displayed). For information on sub buses necessary to diagnose CAN communication system, refer to the System Diagram.

        Click here

      Tip:

      • If the CAN communication system is currently malfunctioning, it is recommended to use Communication Bus Check rather than Communication Bus Check (Detail) for determining the suspected area.

      • The communication error history of ECUs or sensors which have communication error history can be displayed on the "Communication Bus Check (Detail)" screen.

      • Lost Communication Time and Lost Communication Trip are only displayed for the central bus.

      • Lost Communication Time and Lost Communication Trip are not displayed for sub buses.

    2. B006ZBXC01
      *a Bus 2 *b Bus 4
      *c Sub bus *d Diagnosis bus
      *e Location of malfunction *f Background color is red

      If there is an ECU or sensor displayed with a red background on the "Communication Bus Check (Detail)" screen to indicate that it was not communicating, it is suspected that the ECU or sensor was not communicating.

      Details of Malfunction Past malfunction in the wire harness or power supplied to F-MGC in Bus 2
      Table 4. Description of "Communication Bus Check (Detail)" Screen
      Bus Type Background Color Connection Status
      Bus White

      Either of the following:


      • Communication has been normal.

      • Lost Communication Time is below 6 seconds.
      Red Lost Communication Time is 6 seconds or more.
      Not displayed

      Either of the following:


      • The central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the GTS.*1

      • No ECUs or sensors are connected to the bus.*2
      Sub bus White Lost Communication Time is displayed as "-".
      Not displayed

      Either of the following:


      • The gateway function equipped ECU cannot communicate with the central gateway ECU.*3

      • No ECUs or sensors are connected to the sub bus.*4
      Tip:

      • Check the values of Lost Communication Trip and Current Trip for the ECUs or sensors that have a red background color.

      • If the values of Lost Communication Trip and Current Trip are the same for an ECU or sensor, the ECU or sensor is currently not communicating. In this case, it is recommended to use Communication Bus Check rather than Communication Bus Check (Detail) for determining the suspected area.

      • In the "Communication Bus Check (Detail)" screen shown in the illustration, F-MGC had a communication malfunction in the 10th trip. Thus, it is suspected that F-MGC was not communicating.

      • *1: When the central gateway ECU (network gateway ECU) has an internal malfunction or cannot communicate with the GTS, the name of buses, sub buses, ECUs and sensors will not be displayed.

      • *2: When no ECUs or sensors are connected to a bus, the message "There is no system found on the communication Bus." will be displayed.

      • *3: When a gateway function equipped ECU cannot communicate with the central gateway ECU (network gateway ECU), the name of sub buses and ECUs or sensors connected to the sub bus will not be displayed.

      • *4: When no ECUs or sensors are connected to the sub bus, the message "There is no system found on the communication Bus." will be displayed.

  7. DTC TABLE BY ECU

    Tip:

    • In the CAN communication system, the CAN communication DTCs of each ECU can be displayed using the GTS.

    • If CAN communication system DTCs are output, the malfunction cannot be determined only by the DTCs. Perform troubleshooting according to How to Proceed with Troubleshooting.

      Click here

    • DTCs will only be stored if the Check Procedure is performed when the system is currently malfunctioning.


    1. ECM (for 2GR-FKS or A25A-FKS) / GTS Display "Engine"


      1. Powertrain > Engine > Trouble Codes


      Tip:

      • This ECU uses the CAN communication system for DTC communication.

      • *: Refer to SFI System.

        for 2GR-FKS

        Click here

        for A25A-FKS

        Click here

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U010187* Lost Communication with TCM Missing Message The ECM does not receive data from the TCM for approximately 2 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The power source voltage of the ECM is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 4 seconds. MIL illuminates. - DTC is stored until it is cleared using the GTS.

    2. ECM (for 2GR-FKS or A25A-FKS) / GTS Display "Transmission"


      1. Powertrain > Transmission > Trouble Codes


      Tip:

      • This ECU uses the CAN communication system for DTC communication.

      • *: Refer to UA80E Automatic Transaxle System.

        Click here

        *: Refer to UB80E Automatic Transaxle System.

        Click here

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U010087* Lost Communication with ECM/PCM "A" Missing Message The TCM does not receive data from the ECM for approximately 2 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The power source voltage of the ECM is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 4 seconds. MIL illuminates. - DTC is stored until it is cleared using the GTS.

    3. ECM (for 2AR-FE) / GTS Display "Engine and ECT"

      Tip:

      The ECM is connected to the CAN communication system, but the ECM does not store or output CAN communication DTCs.

    4. Brake Actuator Assembly / GTS Display "ABS/VSC/TRC"


      1. Chassis > ABS/VSC/TRC > Trouble Codes


      Tip:

      • This ECU uses the CAN communication system for DTC communication.

      • *: Only when the brake hold function is operating.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0073 Control Module Communication Bus Off Bus off is judged for approximately 1 second or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.

      		 Turn the ignition switch to ON and wait for at least approximately 4 seconds.

      • ABS warning light illuminates.

      • Slip indicator light illuminates.

      • Brake warning light / red (malfunction) illuminates.

      • Brake warning light / yellow (minor malfunction) illuminates.

      • Brake hold operated indicator light blinks.*

      		 Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0100 Lost Communication With ECM/PCM "A" The brake actuator assembly does not receive data from the ECM for approximately 2 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.

      • Vehicle speed is 6 km/h (4 mph) or more.

      		 Drive the vehicle at a speed of 6 km/h (4 mph) or more for approximately 5 seconds or more.

      • Slip indicator light illuminates.

      • Parking brake indicator light illuminates.

      • Brake hold operated indicator light blinks.*

      		 Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0123 Lost Communication With Yaw Rate Sensor Module The brake actuator assembly does not receive data from the airbag sensor assembly for approximately 1 second or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.

      • Vehicle speed is 6 km/h (4 mph) or more.

      		 Drive the vehicle at a speed of 6 km/h (4 mph) or more for approximately 4 seconds or more.

      • Slip indicator light illuminates.

      • Brake hold operated indicator light blinks.*

      		 - DTC is stored until it is cleared using the GTS.
      U0126 Lost Communication With Steering Angle Sensor Module The brake actuator assembly does not receive data from the steering sensor for approximately 1 second or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.

      • Vehicle speed is 6 km/h (4 mph) or more.

      		 Drive the vehicle at a speed of 6 km/h (4 mph) or more for approximately 4 seconds or more.

      • Slip indicator light illuminates.

      • Brake hold operated indicator light blinks.*

      		 - DTC is stored until it is cleared using the GTS.
      U0142 Lost Communication with Body Control Module "B" The brake actuator assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 2 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.

      • Vehicle speed is 6 km/h (4 mph) or more.

      		 Drive the vehicle at a speed of 6 km/h (4 mph) or more for approximately 5 seconds or more.

      • Parking brake indicator light illuminates.

      • Brake hold operated indicator light blinks.*

      		 - DTC is stored until it is cleared using the GTS.
      U0151 Lost Communication With Restraints Control Module The brake actuator assembly does not receive data from the airbag sensor assembly for approximately 5 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the brake actuator assembly is 9.6 to 16.5 V.

      • Vehicle speed is 6 km/h (4 mph) or more.

      		 Drive the vehicle at a speed of 6 km/h (4 mph) or more for approximately 8 seconds or more. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.

    5. Rack and Pinion Power Steering Gear Assembly / GTS Display "EMPS"


      1. Chassis > EMPS > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0100 Lost Communication with ECM/PCM "A" The rack and pinion power steering gear assembly does not receive data from the ECM for approximately 300 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the rack and pinion power steering gear assembly is 9 to 16 V.

      • Vehicle speed is 20 km/h (12 mph) or more.

      		 Drive the vehicle at a speed of 20 km/h (12 mph) or more for approximately 300 seconds or more. - - DTC remains stored only while malfunction is occurring.
      U0126 Lost Communication with Steering Angle Sensor Module The rack and pinion power steering gear assembly does not receive data from the steering sensor for approximately 6 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the rack and pinion power steering gear assembly is 9 to 16 V.

      		 Turn the ignition switch to ON and wait for at least approximately 9 seconds. EPS warning light illuminates. - DTC remains stored only while malfunction is occurring.
      U0129 Lost Communication with Brake System Control Module The rack and pinion power steering gear assembly does not receive data from the brake actuator assembly for approximately 3 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the rack and pinion power steering gear assembly is 9 to 16 V.

      		 Turn the ignition switch to ON and wait for at least approximately 6 seconds. EPS warning light illuminates. - DTC remains stored only while malfunction is occurring.
      U023A Lost Communication with Front Camera Module The rack and pinion power steering gear assembly does not receive data from the forward recognition camera for approximately 1 second or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the rack and pinion power steering gear assembly is 9 to 16 V.

      		 Turn the ignition switch to ON and wait for at least approximately 4 seconds. - - DTC remains stored only while malfunction is occurring.

    6. Airbag Sensor Assembly / GTS Display "SRS Airbag"


      1. Body Electrical > SRS Airbag > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0154 Lost Communication with Restraints Occupant Classification System Module The airbag sensor assembly does not receive data from the occupant detection ECU for approximately 5 seconds or more. The ignition switch is ON for approximately 3 seconds or more. Turn the ignition switch to ON and wait for at least approximately 8 seconds. SRS warning light illuminates. - DTC is stored until it is cleared using the GTS.

    7. Occupant Detection ECU / GTS Display "Occupant Detection"


      1. Body Electrical > Occupant Detection > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0125 Lost Communication With Multi-axis Acceleration Sensor Module The occupant detection ECU does not receive data from the airbag sensor assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the occupant detection ECU is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. SRS warning light illuminates. - DTC is stored until it is cleared using the GTS.
      U0129 Lost Communication With Brake System Control Module The occupant detection ECU does not receive data from the brake actuator assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the occupant detection ECU is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. SRS warning light illuminates. - DTC is stored until it is cleared using the GTS.

    8. Main Body ECU (Multiplex Network Body ECU) / GTS Display "Main Body"


      1. Body Electrical > Main Body > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0100 Lost Communication With ECM/PCM "A" The main body ECU (multiplex network body ECU) does not receive data from the ECM for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0101 Lost Communication with TCM The main body ECU (multiplex network body ECU) does not receive data from the ECM for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0120 Lost Communication With Starter / Generator Control Module The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for approximately 10 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module The main body ECU (multiplex network body ECU) does not receive data from the steering sensor for approximately 10 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0129 Lost Communication with Brake System Control Module The main body ECU (multiplex network body ECU) does not receive data from the brake actuator assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0151 Lost Communication with Restraints Control Module The main body ECU (multiplex network body ECU) does not receive data from the airbag sensor assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module The main body ECU (multiplex network body ECU) does not receive data from the combination meter assembly for approximately 10 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0163 Lost Communication with Navigation Control Module The main body ECU (multiplex network body ECU) does not receive data from the radio and display receiver assembly for approximately 10 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC OFF → ON, IG OFF → ON) is detected and approximately 10 seconds or more elapse.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0164 Lost Communication with HVAC Control Module The main body ECU (multiplex network body ECU) does not receive data from the air conditioning amplifier assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0182 Lost Communication with AFS The main body ECU (multiplex network body ECU) does not receive data from the headlight ECU sub-assembly LH for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0199 Lost Communication with "Door Control Module A" The main body ECU (multiplex network body ECU) does not receive data from the outer mirror control ECU assembly (for driver side) for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0200 Lost Communication with "Door Control Module B" The main body ECU (multiplex network body ECU) does not receive data from the outer mirror control ECU assembly (for front passenger side) for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0208 Lost Communication with "Seat Control Module A" The main body ECU (multiplex network body ECU) does not receive data from the position control ECU assembly RH for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U023A Lost Communication With Image Processing Module "A" The main body ECU (multiplex network body ECU) does not receive data from the forward recognition camera for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. Automatic high beam indicator light flashes. - DTC is stored until it is cleared using the GTS.
      U0327 Software Incompatibility with Vehicle Security Control Module The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for approximately 10 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U1106 Lost Communication with Electric Parking Brake Module The main body ECU (multiplex network body ECU) does not receive data from the brake actuator assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U1115 Lost Communication with Tilt & Telescopic Module The main body ECU (multiplex network body ECU) does not receive data from the multiplex tilt and telescopic ECU for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.

    9. Certification ECU (Smart Key ECU Assembly) / GTS Display "Entry&Start"


      1. Body Electrical > Entry&Start > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0100 Lost Communication With ECM/PCM "A" The certification ECU (smart key ECU assembly) does not receive data from the ECM for approximately 10 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse.

      • The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0142 Lost Communication with Body Control Module "B" The certification ECU (smart key ECU assembly) does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse.

      • The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module The certification ECU (smart key ECU assembly) does not receive data from the combination meter assembly for approximately 10 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 10 seconds or more elapse.

      • The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.

    10. Certification ECU (Smart Key ECU Assembly) / GTS Display "Power Source Control"


      1. Body Electrical > Power Source Control > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0100 ECM Communication The certification ECU (smart key ECU assembly) does not receive data from the ECM for approximately 4 seconds or more.

      Both conditions are met:


      • The ignition switch is ON.

      • The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 4 seconds. - - DTC is stored until it is cleared using the GTS.
      U0140 Lost Communication with Body Control Module The certification ECU (smart key ECU assembly) does not receive data from the main body ECU (multiplex network body ECU) for approximately 3 seconds or more.

      Both conditions are met:


      • The ignition switch is ON.

      • The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 3 seconds. - - DTC is stored until it is cleared using the GTS.
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module The certification ECU (smart key ECU assembly) does not receive data from the combination meter assembly for approximately 4 seconds or more.

      Both conditions are met:


      • The ignition switch is ON.

      • The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 4 seconds. - - DTC is stored until it is cleared using the GTS.

    11. Combination Meter Assembly / GTS Display "Combination Meter"


      1. Body Electrical > Combination Meter > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U010087 Lost Communication with ECM/PCM "A" Missing Message The combination meter assembly does not receive data from the ECM for approximately 4 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 7 seconds. MIL illuminates. - DTC is stored until it is cleared using the GTS.
      U012987 Lost Communication with Brake System Control Module Missing Message The combination meter assembly does not receive data from the brake actuator assembly for approximately 4 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 7 seconds.

      • Brake warning light / red (malfunction) illuminates.

      • VSC OFF indicator light illuminates.

      • ABS warning light illuminates.

      		 - DTC is stored until it is cleared using the GTS.
      U013187 Lost Communication with Power Steering Control Module Missing Message The combination meter assembly does not receive data from the rack and pinion power steering gear assembly for approximately 4 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 7 seconds. EPS warning light illuminates. - DTC is stored until it is cleared using the GTS.
      U014287 Lost Communication with Body Control Module "B" Missing Message The combination meter assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.
      U015187 Lost Communication with Restraints Control Module Missing Message The combination meter assembly does not receive data from the airbag sensor assembly for approximately 10 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 10 seconds. SRS warning light illuminates. - DTC is stored until it is cleared using the GTS.
      U016387 Lost Communication with Navigation Control Module Missing Message The combination meter assembly does not receive data from the radio and display receiver assembly for approximately 5 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 5 seconds. - - DTC is stored until it is cleared using the GTS.
      U016487 Lost Communication with HVAC Control Module Missing Message The combination meter assembly does not receive data from the air conditioning amplifier assembly for approximately 5 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.
      U018287 Lost Communication with Lighting Control Module Front Missing Message The combination meter assembly does not receive data from the headlight ECU sub-assembly LH for approximately 5 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.
      U023387 Lost Communication with Side Obstacle Detection Control Module Right Missing Message The combination meter assembly does not receive data from the blind spot monitor sensor RH for approximately 5 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.
      U023587 Lost Communication with Cruise Control Front Distance Range Sensor Missing Message The combination meter assembly does not receive data from the millimeter wave radar sensor assembly for approximately 5 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. PCS warning light illuminates. - DTC is stored until it is cleared using the GTS.
      U023A87 Lost Communication with Image Processing Module "A" Missing Message The combination meter assembly does not receive data from the forward recognition camera or millimeter wave radar sensor assembly for approximately 5 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 5 seconds. - - DTC is stored until it is cleared using the GTS.
      U032787 Software Incompatibility with Vehicle Security Control Module Missing Message The combination meter assembly does not receive data from the certification ECU (smart key ECU assembly) for approximately 5 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.
      U110687 Lost Communication with Electric Parking Brake Module Missing Message The combination meter assembly does not receive data from the brake actuator assembly for approximately 4 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 7 seconds. Brake warning light / yellow (minor malfunction) illuminates. - DTC is stored until it is cleared using the GTS.
      U111087 Lost Communication with Clearance Sonar Module Missing Message The combination meter assembly does not receive data from the clearance warning ECU assembly for approximately 5 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.
      U111287 Lost Communication with Combination Switch Module Missing Message The combination meter assembly does not receive data from the steering sensor for approximately 10 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 13 seconds. - - DTC is stored until it is cleared using the GTS.
      U113387 Lost Communication with PMN Module Missing Message The combination meter assembly does not receive data from the certification ECU (smart key ECU assembly) for approximately 5 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and approximately 3 seconds or more elapse.

      • The power source voltage of the combination meter assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.

    12. Meter Mirror Sub-assembly / GTS Display "Head Up Display"


      1. Body Electrical > Head Up Display > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U010087 Lost Communication with ECM/PCM "A" Missing Message The meter mirror sub-assembly does not receive data from the ECM for approximately 4 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the meter mirror sub-assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 7 seconds. - - DTC is stored until it is cleared using the GTS.
      U012987 Lost Communication with Brake System Control Module Missing Message The meter mirror sub-assembly does not receive data from the brake actuator assembly for approximately 4 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the meter mirror sub-assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 7 seconds. - - DTC is stored until it is cleared using the GTS.
      U014287 Lost Communication with Body Control Module "B" Missing Message The meter mirror sub-assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the meter mirror sub-assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.
      U015587 Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message The meter mirror sub-assembly does not receive data from the combination meter assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the meter mirror sub-assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.
      U016387 Lost Communication with Navigation Control Module Missing Message The meter mirror sub-assembly does not receive data from the radio and display receiver assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the meter mirror sub-assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.
      U016487 Lost Communication with HVAC Control Module Missing Message The meter mirror sub-assembly does not receive data from the air conditioning amplifier assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the meter mirror sub-assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.
      U023587 Lost Communication with Cruise Control Front Distance Range Sensor Missing Message The meter mirror sub-assembly does not receive data from the millimeter wave radar sensor assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the meter mirror sub-assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.
      U023A87 Lost Communication with Image Processing Module "A" Missing Message The meter mirror sub-assembly does not receive data from the forward recognition camera for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the meter mirror sub-assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.
      U111087 Lost Communication with Clearance Sonar Module Missing Message The meter mirror sub-assembly does not receive data from the clearance warning ECU assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the meter mirror sub-assembly is 10.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.

    13. Air Conditioning Amplifier Assembly / GTS Display "Air Conditioner"


      1. Body Electrical > Air Conditioner > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0100 Lost Communication With ECM/PCM "A" The air conditioning amplifier assembly does not receive data from the ECM for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON.

      • The power source voltage of the air conditioning amplifier assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.
      U0131 Lost Communication With Power Steering Control Module The air conditioning amplifier assembly does not receive data from the rack and pinion power steering gear assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON.

      • The power source voltage of the air conditioning amplifier assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.
      U0142 Lost Communication With Body Control Module "B" The air conditioning amplifier assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON.

      • The power source voltage of the air conditioning amplifier assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.
      U0151 Lost Communication With Restraints Control Module The air conditioning amplifier assembly does not receive data from the airbag sensor assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON.

      • The power source voltage of the air conditioning amplifier assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.
      U0155 Lost Communication With Instrument Panel Cluster (IPC) Control Module The air conditioning amplifier assembly does not receive data from the combination meter assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON.

      • The power source voltage of the air conditioning amplifier assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.
      U0163 Lost Communication With Navigation Control Module The air conditioning amplifier assembly does not receive data from the radio and display receiver assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON.

      • The power source voltage of the air conditioning amplifier assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.

    14. ECM (for 2AR-FE, w/ Cruise Control System) / GTS Display "Cruise Control"


      1. Powertrain > Cruise Control > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0122 Lost Communication with Vehicle Dynamics Control Module The ECM does not receive data from the brake actuator assembly for approximately 3 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The cruise control main switch is on.

      • The power source voltage of the ECM is 10.5 V or more.

      		 Turn the cruise control main switch on and wait for at least approximately 4 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.

    15. ECM (for 2GR-FKS, w/ Cruise Control System) / GTS Display "Cruise Control"


      1. Powertrain > Cruise Control > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U012287 Lost Communication with Vehicle Dynamics Control Module Missing Message The ECM does not receive data from the brake actuator assembly for approximately 3 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The cruise control main switch is on.

      • The power source voltage of the ECM is 10.5 V or more.

      		 Turn the cruise control main switch on and wait for at least approximately 4 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.

    16. ECM (for 2AR-FE, w/ Dynamic Radar Cruise Control System) / GTS Display "Radar Cruise1"


      1. Powertrain > Radar Cruise1 > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0100 Lost Communication with ECM/PCM "A" The brake actuator assembly does not receive data from the ECM for approximately 1 second or more.

      All conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The cruise control main switch is on.

      • The power source voltage of the ECM is 10.5 V or more.

      • Vehicle speed is 5 km/h (3 mph) or more.

      		 Drive the vehicle at a speed of 5 km/h (3 mph) or more with the cruise control main switch on for approximately 2 seconds or more. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0104 Lost Communication with Cruise Control Module The ECM does not receive data from the millimeter wave radar sensor assembly for approximately 2 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The cruise control main switch is on.

      • The power source voltage of the ECM is 10.5 V or more.

      		 Turn the cruise control main switch on and wait for at least approximately 3 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0122 Lost Communication with Vehicle Dynamics Control Module The ECM does not receive data from the brake actuator assembly for approximately 3 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The cruise control main switch is on.

      • The power source voltage of the ECM is 10.5 V or more.

      		 Turn the cruise control main switch on and wait for at least approximately 4 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.

    17. ECM (for A25A-FKS, w/ Dynamic Radar Cruise Control System) / GTS Display "Radar Cruise1"


      1. Powertrain > Cruise Control > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U010087 Lost Communication with ECM/PCM "A" Missing Message The brake actuator assembly does not receive data from the ECM for approximately 1 second or more.

      All conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The cruise control main switch is on.

      • The power source voltage of the ECM is 10.5 V or more.

      • Vehicle speed is 5 km/h (3 mph) or more.

      		 Drive the vehicle at a speed of 5 km/h (3 mph) or more with the cruise control main switch on for approximately 2 seconds or more. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U010487 Lost Communication with Cruise Control Module Missing Message The ECM does not receive data from the millimeter wave radar sensor assembly for approximately 2 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The cruise control main switch is on.

      • The power source voltage of the ECM is 10.5 V or more.

      		 Turn the cruise control main switch on and wait for at least approximately 3 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U012287 Lost Communication with Vehicle Dynamics Control Module Missing Message The ECM does not receive data from the brake actuator assembly for approximately 3 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The cruise control main switch is on.

      • The power source voltage of the ECM is 10.5 V or more.

      		 Turn the cruise control main switch on and wait for at least approximately 4 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.

    18. Millimeter Wave Radar Sensor Assembly / GTS Display "Radar Cruise2"


      1. Powertrain > Radar Cruise2 > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0100 Lost Communication with ECM/PCM "A" The millimeter wave radar sensor assembly does not receive data from the ECM for approximately 1 second or more.

      All conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The cruise control main switch is on.

      • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

      • Vehicle speed is 5 km/h (3 mph) or more.

      		 Drive the vehicle at a speed of 5 km/h (3 mph) or more with the cruise control main switch on for approximately 2 seconds or more. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0125 Lost Communication with Yaw Rate Sensor Module The millimeter wave radar sensor assembly does not receive data from the airbag sensor assembly for approximately 1 second or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The cruise control main switch is on.

      • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

      • Vehicle speed is 5 km/h (3 mph) or more.

      		 Drive the vehicle at a speed of 5 km/h (3 mph) or more with the cruise control main switch on for approximately 4 seconds or more. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module The millimeter wave radar sensor assembly does not receive data from the steering sensor for approximately 6 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The cruise control main switch is on.

      • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

      • Vehicle speed is 5 km/h (3 mph) or more.

      		 Drive the vehicle at a speed of 5 km/h (3 mph) or more with the cruise control main switch on for approximately 7 seconds or more. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0129 Lost Communication with Brake System Control Module The millimeter wave radar sensor assembly does not receive data from the brake actuator assembly for approximately 2 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 2 seconds or more.

      • The cruise control main switch is on.

      • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

      • Vehicle speed is 5 km/h (3 mph) or more.

      		 Drive the vehicle at a speed of 5 km/h (3 mph) or more with the cruise control main switch on for approximately 4 seconds or more. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.

    19. Millimeter Wave Radar Sensor Assembly / GTS Display "Pre-Collision 2"


      1. Body Electrical > Pre-Collision 2 > Trouble Codes


      Tip:

      • This ECU uses the CAN communication system for DTC communication.

      • *: Refer to Pre-Collision System.

        Click here

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0100 Lost Communication with ECM/PCM "A" The millimeter wave radar sensor assembly does not receive data from the ECM for approximately 4 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • Vehicle speed is 5 km/h (3 mph) or more.

      • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

      		 Drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 7 seconds or more. PCS warning light blinks. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0125 Lost Communication with Yaw Rate Sensor Module The millimeter wave radar sensor assembly does not receive data from the airbag sensor assembly for approximately 1 second or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • Vehicle speed is 5 km/h (3 mph) or more.

      • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

      		 Drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 4 seconds or more. PCS warning light blinks. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module The millimeter wave radar sensor assembly does not receive data from the steering sensor for approximately 4 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 7 seconds. PCS warning light blinks. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0129 Lost Communication with Brake System Control Module The millimeter wave radar sensor assembly does not receive data from the brake actuator assembly for approximately 6 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 9 seconds. PCS warning light blinks. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module The millimeter wave radar sensor assembly does not receive data from the combination meter assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. PCS warning light blinks. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0235* Lost Communication with Cruise Control Front Distance Range Sensor The brake actuator assembly does not receive data from the millimeter wave radar sensor assembly for approximately 2 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 2 seconds or more.

      • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 4 seconds. PCS warning light blinks. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U023A* Lost Communication with Image Processing Module "A" The millimeter wave radar sensor assembly does not receive data from the forward recognition camera for approximately 1 second or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 4 seconds. PCS warning light blinks. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U1002* Lost Communication with Gateway Module The millimeter wave radar sensor assembly does not receive data from the forward recognition camera for approximately 1 second or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the millimeter wave radar sensor assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 4 seconds. PCS warning light blinks. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.

    20. Forward Recognition Camera / GTS Display "LKA/LDA"


      1. Chassis > LKA/LDA > Trouble Codes


      Tip:

      • This ECU uses the CAN communication system for DTC communication.

      • *: Refer to Lane Departure Alert System.

        Click here

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0100 Lost Communication with ECM/PCM "A" The forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      • Vehicle speed is 5 km/h (3 mph) or more.

      		 Drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 8 seconds or more. Lane departure alert indicator (yellow) illuminates. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0123 Lost Communication with Yaw Rate Sensor Module The forward recognition camera does not receive data from the airbag sensor assembly for approximately 5 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      • Vehicle speed is 5 km/h (3 mph) or more.

      		 Drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 8 seconds or more. Lane departure alert indicator (yellow) illuminates. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module The forward recognition camera does not receive data from the steering sensor for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. Lane departure alert indicator (yellow) illuminates. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0129 Lost Communication with Brake System Control Module The forward recognition camera does not receive data from the brake actuator assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. Lane departure alert indicator (yellow) illuminates. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0131 Lost Communication with Power Steering Control Module The forward recognition camera does not receive data from the rack and pinion power steering gear assembly for approximately 5 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      • Vehicle speed is 5 km/h (3 mph) or more.

      		 Drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 8 seconds or more. Lane departure alert indicator (yellow) illuminates. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0142 Lost Communication with Body Control Module "B" The forward recognition camera does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. Lane departure alert indicator (yellow) illuminates. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module (Combination Meter) The forward recognition camera does not receive data from the combination meter assembly for approximately 50 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 53 seconds. Lane departure alert indicator (yellow) illuminates. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0235* Lost Communication with Cruise Control Front Distance Range Sensor The forward recognition camera does not receive data from the millimeter wave radar sensor assembly for approximately 5 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      • Vehicle speed is 5 km/h (3 mph) or more.

      		 Drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 8 seconds or more. Lane departure alert indicator (yellow) illuminates. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U023A* Lost Communication with Image Processing Module "A" The rack and pinion power steering gear assembly does not receive data from the forward recognition camera for approximately 5 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      • Vehicle speed is 5 km/h (3 mph) or more.

      		 Drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 8 seconds or more. Lane departure alert indicator (yellow) illuminates. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.

    21. Forward Recognition Camera / GTS Display "Front Recognition Camera"


      1. Chassis > Front Recognition Camera > Trouble Codes


      Tip:

      • This ECU uses the CAN communication system for DTC communication.

      • *: Refer to Forward Recognition Camera System.

        Click here

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0100 Lost Communication with ECM/PCM "A" The forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      • Vehicle speed is 1 km/h or 1 mph or more.

      		 Drive the vehicle at a speed of 1 km/h or 1 mph or more for approximately 8 seconds or more. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0101 Lost Communication with TCM The forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      • Vehicle speed is 1 km/h or 1 mph or more.

      		 Drive the vehicle at a speed of 1 km/h or 1 mph or more for approximately 8 seconds or more. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0123 Lost Communication with Yaw Rate Sensor Module The forward recognition camera does not receive data from the airbag sensor assembly for approximately 5 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      • Vehicle speed is 1 km/h or 1 mph or more.

      		 Drive the vehicle at a speed of 1 km/h or 1 mph or more for approximately 8 seconds or more. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module The forward recognition camera does not receive data from the steering sensor for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0129 Lost Communication with Brake System Control Module The forward recognition camera does not receive data from the brake actuator assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0131 Lost Communication with Power Steering Control Module The forward recognition camera does not receive data from the rack and pinion power steering gear assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0142 Lost Communication with Body Control Module "B" The forward recognition camera does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module The forward recognition camera does not receive data from the combination meter assembly for approximately 50 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 53 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0235* Lost Communication with Cruise Control Front Distance Range Sensor The forward recognition camera does not receive data from the millimeter wave radar sensor assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U023A* Lost Communication with Image Processing Module "A" The rack and pinion power steering gear assembly does not receive data from the forward recognition camera for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the forward recognition camera is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 8 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.

    22. Blind Spot Monitor Sensor RH / GTS Display "Blind Spot Monitor Master"


      1. Body Electrical > Blind Spot Monitor Master > Trouble Codes


      Tip:

      • This ECU uses the CAN communication system for DTC communication.

      • *: Refer to Blind Spot Monitor System.

        Click here

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0100 Lost Communication with ECM/PCM "A" The blind spot monitor sensor RH does not receive data from the ECM for approximately 11 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The blind spot monitor main switch is on.

      • The power source voltage of the blind spot monitor sensor RH is 10 V or more.

      		 Turn the ignition switch to ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 14 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0125 Lost Communication with Yaw Rate Sensor Module The blind spot monitor sensor RH does not receive data from the airbag sensor assembly for approximately 4 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The blind spot monitor main switch is on.

      • The power source voltage of the blind spot monitor sensor RH is 10 V or more.

      		 Turn the ignition switch to ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 7 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module The blind spot monitor sensor RH does not receive data from the steering sensor for approximately 6 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The blind spot monitor main switch is on.

      • The power source voltage of the blind spot monitor sensor RH is 10 V or more.

      		 Turn the ignition switch to ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 9 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0129 Lost Communication with Brake System Control Module The blind spot monitor sensor RH does not receive data from the brake actuator assembly for approximately 6 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 2 seconds or more.

      • The blind spot monitor main switch is on.

      • The power source voltage of the blind spot monitor sensor RH is 10 V or more.

      		 Turn the ignition switch to ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 8 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0142 Lost Communication with Body Control Module "B" The blind spot monitor sensor RH does not receive data from the main body ECU (multiplex network body ECU) for approximately 13 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The blind spot monitor main switch is on.

      • The power source voltage of the blind spot monitor sensor RH is 10 V or more.

      		 Turn the ignition switch to ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 14 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0232* Lost Communication with Blind Spot Monitor Slave Module The blind spot monitor sensor RH does not receive data from the blind spot monitor sensor LH for approximately 13 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The blind spot monitor main switch is on.

      • The power source voltage of the blind spot monitor sensor RH is 10 V or more.

      		 Turn the ignition switch to ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 14 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0233* Lost Communication with Blind Spot Monitor Master Module The blind spot monitor sensor LH does not receive data from the blind spot monitor sensor RH for approximately 13 seconds or more.

      All conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The blind spot monitor main switch is on.

      • The power source voltage of the blind spot monitor sensor RH is 10 V or more.

      		 Turn the ignition switch to ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 14 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U1331* Software Incompatibility with Body Control Module "B" Destination information of the main body ECU (multiplex network body ECU) and blind spot monitor sensor RH do not match.

      All conditions are met:


      • The ignition switch is ON for approximately 1 second or more.

      • The blind spot monitor main switch is on.

      • The power source voltage of the blind spot monitor sensor RH is 10 V or more.

      		 Turn the ignition switch to ON, turn the blind spot monitor system on using the blind spot monitor main switch (ON/OFF switch) and wait for at least approximately 1 second. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.

    23. Tire Pressure Warning ECU and Receiver / GTS Display "Tire Pressure Monitor"


      1. Chassis > Tire Pressure Monitor > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0129 Lost Communication with Brake System Control Module The tire pressure warning ECU and receiver does not receive data from the brake actuator assembly for approximately 60 seconds or more. The ignition switch is ON for approximately 1 second or more. Turn the ignition switch to ON and wait for at least approximately 61 seconds. - - DTC remains stored only while malfunction is occurring.

    24. Radio and Display Receiver Assembly / GTS Display "Navigation System"


      1. Body Electrical > Navigation System > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0073 Sending Malfunction (Navigation to APGS) The radio and display receiver assembly does not send/receive data for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0100 Engine ECU Communication The radio and display receiver assembly does not receive data from the ECM for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0129 VSC(ECB)ECU Communication The radio and display receiver assembly does not receive data from the brake actuator assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0140 Lost Communication with Body Control Module The radio and display receiver assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0155 Meter ECU Communication The radio and display receiver assembly does not receive data from the combination meter assembly for approximately 30 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 30 seconds or more.

      • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 60 seconds. - - DTC is stored until it is cleared using the GTS.
      U0164 Air Conditioner ECU Communication The radio and display receiver assembly does not receive data from the air conditioning amplifier assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0265 Lost Communication with Image Processing Sensor A The radio and display receiver assembly does not receive data from the rear television camera assembly for approximately 12 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 12 seconds or more.

      • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 24 seconds. - - DTC is stored until it is cleared using the GTS.
      U1110 Clearance Sonar ECU Communication The radio and display receiver assembly does not receive data from the clearance warning ECU assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 10 seconds or more.

      • The power source voltage of the radio and display receiver assembly is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.

    25. Rear Television Camera Assembly / GTS Display "Parking Assist Camera"


      1. Chassis > Parking Assist Camera > Trouble Codes


      Tip:

      • This ECU uses the CAN communication system for DTC communication.

      • *: The rear television camera assembly stores U1000 if an internal error related to the CAN communication system is detected.

        Click here

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0100 Lost Communication with ECM/PCM "A" The rear television camera assembly does not receive data from the ECM for approximately 11 seconds or more. The ignition switch is ON for approximately 3 seconds or more. Turn the ignition switch to ON and wait for at least approximately 14 seconds. - - DTC is stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module The rear television camera assembly does not receive data from the steering sensor for approximately 11 seconds or more. The ignition switch is ON for approximately 3 seconds or more. Turn the ignition switch to ON and wait for at least approximately 14 seconds. - - DTC is stored until it is cleared using the GTS.
      U0140 Lost Communication with Body Control Module The rear television camera assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 11 seconds or more. The ignition switch is ACC for approximately 3 seconds or more. Turn the ignition switch to ON and wait for at least approximately 14 seconds. - - DTC is stored until it is cleared using the GTS.
      U0163 Lost Communication with Navigation Control Module The rear television camera assembly does not receive data from the radio and display receiver assembly for approximately 11 seconds or more. The ignition switch is ACC for approximately 3 seconds or more. Turn the ignition switch to ON and wait for at least approximately 14 seconds. - - DTC is stored until it is cleared using the GTS.
      U0233 Lost Communication with Blind Spot Monitor Master Module The rear television camera assembly does not receive data from the blind spot monitor sensor RH for approximately 11 seconds or more. The ignition switch is ON for approximately 3 seconds or more. Turn the ignition switch to ON and wait for at least approximately 14 seconds. - - DTC is stored until it is cleared using the GTS.
      U1000* CAN Communication Failure(Message Registry) When the ignition switch is turned to ON, a CAN communication malfunction is detected. The ignition switch is ON. Turn the ignition switch to ON. - - DTC remains stored only while malfunction is occurring.
      U1110 Lost Communication with Clearance Sonar Module The rear television camera assembly does not receive data from the clearance warning ECU assembly for approximately 11 seconds or more. The ignition switch is ON for approximately 3 seconds or more. Turn the ignition switch to ON and wait for at least approximately 14 seconds. - - DTC is stored until it is cleared using the GTS.

    26. Clearance Warning ECU Assembly / GTS Display "IPA/ICS/Clearance Sonar"


      1. Body Electrical > IPA/ICS/Clearance Sonar > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0100 Lost Communication with ECM/PCM "A" The clearance warning ECU assembly does not receive data from the ECM for approximately 2 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 5 seconds or more.

      • The power source voltage of the clearance warning ECU assembly is 10.2 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 7 seconds. - - DTC is stored until it is cleared using the GTS.
      U0101 Lost Communication with TCM The clearance warning ECU assembly does not receive data from the ECM for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 5 seconds or more.

      • The power source voltage of the clearance warning ECU assembly is 10.2 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.
      U0142 Lost Communication with Body Control Module "B" The clearance warning ECU assembly does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 5 seconds or more.

      • The power source voltage of the clearance warning ECU assembly is 10.2 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.
      U0155 Lost Communication With Instrument Panel Cluster (IPC) Control Module The clearance warning ECU assembly does not receive data from the combination meter assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 5 seconds or more.

      • The power source voltage of the clearance warning ECU assembly is 10.2 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.

    27. Headlight ECU Sub-assembly LH / GTS Display "HL AutoLeveling"


      1. Body Electrical > HL AutoLeveling > Trouble Codes


      Tip:

      • This ECU uses the CAN communication system for DTC communication.

      • *: Refer to Lighting System.

        Click here

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0073 Control Module Communication Bus Off The headlight ECU sub-assembly LH does not send/receive data.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 3 seconds. - - DTC is stored until it is cleared using the GTS.
      U0100 Lost Communication with ECM/PCM "A" The headlight ECU sub-assembly LH does not receive data from the ECM for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 13 seconds. - - DTC is stored until it is cleared using the GTS.
      U0101 Lost Communication with TCM The headlight ECU sub-assembly LH does not receive data from the ECM for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 13 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module The headlight ECU sub-assembly LH does not receive data from the steering sensor for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 13 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0129 Lost Communication with Brake System Control Module The headlight ECU sub-assembly LH does not receive data from the brake actuator assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 13 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0142 Lost Communication with Body Control Module "B" The headlight ECU sub-assembly LH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 13 seconds. - - DTC is stored until it is cleared using the GTS.
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module The headlight ECU sub-assembly LH does not receive data from the combination meter assembly for approximately 30 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 33 seconds. - - DTC is stored until it is cleared using the GTS.
      U0242 Lost Communication With Headlamp Control Module "B" The headlight ECU sub-assembly LH does not receive data from the headlight ECU sub-assembly RH for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 13 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U1000* CAN Communication Failure(Message Registry) CAN communication malfunction (message register)

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the headlight ECU sub-assembly LH is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 3 seconds. - - DTC is stored until it is cleared using the GTS.

    28. Headlight ECU Sub-assembly RH / GTS Display "HL AutoLeveling (Sub)"


      1. Body Electrical > HL AutoLeveling (Sub) > Trouble Codes


      Tip:

      • This ECU uses the CAN communication system for DTC communication.

      • *: Refer to Lighting System.

        Click here

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0073 Control Module Communication Bus Off The headlight ECU sub-assembly RH does not send/receive data.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the headlight ECU sub-assembly RH is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 3 seconds. - - DTC is stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module The headlight ECU sub-assembly RH does not receive data from the steering sensor for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the headlight ECU sub-assembly RH is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 13 seconds. - - DTC is stored until it is cleared using the GTS.
      U0142 Lost Communication with Body Control Module "B" The headlight ECU sub-assembly RH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the headlight ECU sub-assembly RH is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 13 seconds. - - DTC is stored until it is cleared using the GTS.
      U0182 Lost Communication With Lighting Control Module Front The headlight ECU sub-assembly RH does not receive data from the headlight ECU sub-assembly LH for approximately 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the headlight ECU sub-assembly RH is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 13 seconds. - - DTC is stored until it is cleared using the GTS.
      U1000* CAN Communication Failure (Message Registry) CAN communication malfunction (message register)

      Both conditions are met:


      • The ignition switch is ON for approximately 3 seconds or more.

      • The power source voltage of the headlight ECU sub-assembly RH is 9.5 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 3 seconds. - - DTC is stored until it is cleared using the GTS.

    29. Multiplex Tilt and Telescopic ECU / GTS Display "Tilt&Telescopic"


      1. Body Electrical > Tilt&Telescopic > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U014287 Lost Communication with Body Control Module "B" Missing Message The multiplex tilt and telescopic ECU does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more. The power source voltage of the multiplex tilt and telescopic ECU is 9 V or more. Turn the ignition switch to ON and wait for at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.
      U015587 Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message The multiplex tilt and telescopic ECU does not receive data from the combination meter assembly for approximately 10 seconds or more. The power source voltage of the multiplex tilt and telescopic ECU is 9 V or more. Turn the ignition switch to ON and wait for at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.
      U020887 Lost Communication with "Seat Control Module A" Missing Message The multiplex tilt and telescopic ECU does not receive data from the position control ECU assembly RH for approximately 10 seconds or more. The power source voltage of the multiplex tilt and telescopic ECU is 9 V or more. Turn the ignition switch to ON and wait for at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.

    30. Outer Mirror Control ECU Assembly (for Driver Side) / GTS Display "Mirror R"


      1. Body Electrical > Mirror R > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0142 Lost Communication With Body Control Module "B" The outer mirror control ECU assembly (for driver side) does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected.

      • The power source voltage of the outer mirror control ECU assembly (for driver side) is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.

    31. Outer Mirror Control ECU Assembly (for Front Passenger Side) / GTS Display "Mirror L"


      1. Body Electrical > Mirror L > Trouble Codes


      Tip:

      This ECU uses the CAN communication system for DTC communication.

      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Displayed DTC Storage Method
      Indication in Meter Multi-information Display
      U0142 Lost Communication With Body Control Module "B" The outer mirror control ECU assembly (for front passenger side) does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

      Both conditions are met:


      • Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected.

      • The power source voltage of the outer mirror control ECU assembly (for front passenger side) is 10 V or more.

      		 Turn the ignition switch to ON and wait for at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.

    32. Position Control ECU Assembly RH / GTS Display "Driver Seat"

      Tip:

      The position control ECU assembly RH is connected to the CAN communication system, but the position control ECU assembly RH does not store or output CAN communication DTCs.

    33. Central Gateway ECU (Network Gateway ECU) / GTS Display "Central Gateway"

      Tip:

      The central gateway ECU (network gateway ECU) is connected to the CAN communication system, but the central gateway ECU (network gateway ECU) does not store or output CAN communication DTCs.

    34. Steering Sensor / GTS Display "Steering Angle Sensor"

      Tip:

      The steering sensor is connected to the CAN communication system, but the steering sensor does not store or output CAN communication DTCs.

  8. B006YT0E02

    CAN BUS WAVEFORMS

    Tip:

    • The following waveforms are measured between terminals CANH and GND, and terminals CANL and GND of the central gateway ECU (network gateway ECU). (Use this as a reference for diagnosis of CAN communication lines.)

    • When malfunctions in multiple ECUs are suspected based on the CAN bus check and DTCs checked using the GTS, check the resistance of the CAN bus using an ohmmeter first. If no problems are found, check the following waveforms.

      Click here

    • If a waveform is not similar to one of the following 3 patterns (Group 1), then an open in a CAN main bus line, an open in a CAN branch line, or a short between a CAN line (CANH or CANL) and ground is suspected (Group 2).

    • Wiggle the connector and wire harness to check if the waveform changes.


    1. CAN bus waveforms (Group 1)


      1. B006XY8N07
        Table 5.
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Normal waveform

      2. B006Y4NN05
        Table 6.
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Open in both of the lines (CANH and CANL) of a CAN branch

        Tip:

        • Waveforms (waveforms shown using dotted lines) are not present from an ECU or sensor connected to a CAN branch with an open circuit in both lines. (Waveforms from other ECUs or sensors are normal.)

        • Because this waveform is similar to a normal waveform, instead of using the waveform, the malfunctioning part can be narrowed down by performing a CAN bus check.

      3. B00701VN05
        Table 7.
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Short between the CAN bus lines (CANH and CANL)

        Tip:

        • Waveforms disappear.

        • If the malfunction is in an ECU, disconnecting the ECU will change the waveform. If the waveform does not change, a malfunction in the wire harness is suspected.

    2. CAN bus waveforms (reference) (Group 2)

      Note:

      The following CAN bus waveforms can be used only as reference. The actual measured waveform may differ significantly depending on the location of the open or short circuit.


      1. B006Z0MN05
        Table 8.
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Open in a CAN branch line (CANH)

        Tip:

        • An abnormal waveform is output from an ECU with an open in one of its CAN branch lines. Because this abnormal output interferes with the signals from other ECUs, the output of other ECUs will also appear abnormal.

        • Narrow down the malfunctioning part by checking DTCs or performing a CAN bus check, or by checking waveform changes when ECUs or sensors are disconnected. The waveform will change to one for an open in both sides of a CAN branch when the ECU or sensor with an open CAN branch line is disconnected.

      2. B006XC5N05
        Table 9.
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Open in a CAN branch line (CANL)

        Tip:

        • An abnormal waveform is output from an ECU with an open in one of its CAN branch lines. Because this abnormal output interferes with the signals from other ECUs, the output of other ECUs will also appear abnormal.

        • Narrow down the malfunctioning part by checking DTCs or performing a CAN bus check, or by checking waveform changes when ECUs or sensors are disconnected. The waveform will change to one for an open in both sides of a CAN branch when the ECU or sensor with an open CAN branch line is disconnected.

      3. B006YTIN05
        Table 10.
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Open in a CAN main bus line (CANH)

        Tip:

        • Waveforms of ECUs or sensors that are closer to the central gateway ECU (network gateway ECU) than the open part are almost normal.

        • Waveforms of ECUs or sensors that are on the opposite side of the central gateway ECU (network gateway ECU) from the open part are abnormal.

        • An open in a CAN main bus line can be confirmed by measuring the resistance between the CANH and CANL terminals of any CAN branch.

      4. B0071IQN05
        Table 11.
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Short between a CAN bus line (CANH) and ground

        Tip:

        • Narrow down the shorted part by checking for waveform changes when disconnecting connectors from the CAN junction connectors or when disconnecting ECUs or sensors.

        • A short to ground in the CANH line can be confirmed by measuring the resistance between CANH and ground using an ohmmeter.

      5. B006YWFN05
        Table 12.
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Short between a CAN bus line (CANL) and ground

        Tip:

        • Narrow down the shorted part by checking for waveform changes when disconnecting connectors from the CAN junction connectors or when disconnecting ECUs or sensors.

        • A short to ground in the CANL line can be confirmed by measuring the resistance between CANL and ground using an ohmmeter.

  9. DATA SENDING/RECEIVING TABLE


    1. Data sending/receiving table

      Tip:

      If Data List items related to sent/received data are not displayed properly, the part for which communication is interrupted can be determined using the table below.

      Data Content Data Detected and Sent by Data Received by Relevant Data List Item
      Can be Checked in the Data List Cannot be Checked in the Data List Selected System*9 Data List Items
      Accelerator position ECM

      • Brake actuator assembly

      • Millimeter wave radar sensor assembly

      • Forward recognition camera

      • Radio and display receiver assembly

      		 Engine and ECT*4 Accelerator Position
      Engine*5*6 Accelerator Position
      ABS/VSC/TRC Accelerator Opening Angle %
      Radar Cruise2 Vehicle Acceleration
      Engine speed ECM

      • Certification ECU (smart key ECU assembly)

      • Combination meter assembly

      • Brake actuator assembly

      • Air conditioning amplifier assembly

      • Main body ECU (multiplex network body ECU)

      • Airbag sensor assembly

      • Radio and display receiver assembly

      		 Engine and ECT*4 Engine Speed
      Engine*5*6 Engine Speed
      Starting Control Engine Speed
      Combination Meter Engine RPM
      ABS/VSC/TRC Engine Revolutions
      Engine coolant temperature ECM

      • Combination meter assembly

      • Air conditioning amplifier assembly

      		 Radio and display receiver assembly Engine and ECT*4 Coolant Temp
      Engine*5*6 Coolant Temperature
      Combination Meter Coolant Temperature
      Air Conditioner Engine Coolant Temp
      Vehicle speed Brake actuator assembly

      • Rack and pinion power steering gear assembly

      • Combination meter assembly

      • Occupant detection ECU

      • Radio and display receiver assembly

      • ECM

      • Millimeter wave radar sensor assembly

      • Main body ECU (multiplex network body ECU)

      • Airbag sensor assembly

      • Forward recognition camera

      		 ABS/VSC/TRC Vehicle Speed
      EMPS Meter Vehicle Velocity
      Combination Meter Vehicle Speed Meter
      Occupant Detection VSC Vehicle Speed
      Navigation System Vehicle Speed
      Engine and ECT*4 Vehicle Speed
      Engine*5*6 Vehicle Speed
      Radar Cruise2 Vhcl Spd-Brake ECU
      Combination meter assembly*3

      • Meter mirror sub-assembly

      • Position control ECU assembly RH

      • Multiplex tilt and telescopic ECU

      • Air conditioning amplifier assembly

      • Main body ECU (multiplex network body ECU)

      • Certification ECU (smart key ECU assembly)

      • Clearance warning ECU assembly

      		 Combination Meter Vehicle Speed Meter
      Head Up Display Vehicle Speed Meter
      Driver Seat Vehicle Speed
      Tilt&Telescopic Vehicle Speed
      Wheel speed Brake actuator assembly Rack and pinion power steering gear assembly

      • Airbag sensor assembly

      • Blind spot monitor sensor RH

      • Forward recognition camera

      • Millimeter wave radar sensor assembly

      • Radio and display receiver assembly

      • ECM

      		 ABS/VSC/TRC FR Wheel Speed
      FL Wheel Speed
      RR Wheel Speed
      RL Wheel Speed
      EMPS Wheel Speed Right
      Wheel Speed Left
      Shift position ECM

      • Blind spot monitor sensor RH

      • Certification ECU (smart key ECU assembly)

      • Radio and display receiver assembly

      • Clearance warning ECU assembly

      • Position control ECU assembly RH

      • Main body ECU (multiplex network body ECU)

      • Combination meter assembly*2

      • Airbag sensor assembly

      • Tire pressure warning ECU and receiver

      • Rear television camera assembly

      • Forward recognition camera

      • Millimeter wave radar sensor assembly

      • Meter mirror sub-assembly

      • Headlight ECU sub-assembly LH

      		 Engine and ECT*4 Neutral Position SW Signal
      Engine*5*6 Shift SW Status (P Range)
      Shift SW Status (R Range)
      Shift SW Status (N Range)
      Shift SW Status (N,P Range)
      Shift SW Status (D Range)
      Blind Spot Monitor Master Reverse (Only for AT/CVT)
      Power Source Control Shift P Signal
      Navigation System Reverse Signal
      IPA/ICS/Clearance Sonar Parking Signal
      Reverse Signal
      Driver Seat Shift SW Position
      Ambient temperature Air conditioning amplifier assembly

      • Combination meter assembly

      • ECM

      • Meter mirror sub-assembly

      • Main body ECU (multiplex network body ECU)

      • Rack and pinion power steering gear assembly

      • Forward recognition camera

      • Radio and display receiver assembly

      • Clearance warning ECU assembly

      • Brake actuator assembly

      		 Air Conditioner Ambient Temp Sensor
      Combination Meter Ambient Temperature (Celsius)
      Ambient Temperature (Fahrenheit)
      Engine and ECT*4 Ambient Temp for A/C
      Engine*5*6 Ambient Temp for A/C
      Head Up Display Ambient Temperature (Celsius)
      Ambient Temperature (Fahrenheit)
      Driver door courtesy switch Main body ECU (multiplex network body ECU) -

      • Certification ECU (smart key ECU assembly)

      • Combination meter assembly*2

      • Radio and display receiver assembly

      • ECM

      • Brake actuator assembly

      		 Main Body FR Door Courtesy SW*8
      FL Door Courtesy SW*7
      Steering angle Steering sensor

      • Blind spot monitor sensor RH

      • Rack and pinion power steering gear assembly

      • Brake actuator assembly

      • Millimeter wave radar sensor assembly

      • Headlight ECU sub-assembly LH

      • Main body ECU (multiplex network body ECU)

      • Airbag sensor assembly

      • Rear television camera assembly

      • Forward recognition camera

      • Radio and display receiver assembly

      • ECM

      		 Blind Spot Monitor Master Steering Angle
      EMPS Steering Angle Velocity
      ABS/VSC/TRC Steering Angle Sensor
      Radar Cruise2 Steering Angle
      HL AutoLeveling Steering Sensor Signal
      Yaw rate Airbag sensor assembly

      • Brake actuator assembly

      • Blind spot monitor sensor RH

      • Millimeter wave radar sensor assembly

      • Rack and pinion power steering gear assembly

      • Forward recognition camera

      • Radio and display receiver assembly

      • ECM*4

      		 ABS/VSC/TRC Yaw Rate Sensor
      Blind Spot Monitor Master Yaw Rate Sensor
      Radar Cruise2 Yaw Rate Sensor
      Acceleration Airbag sensor assembly

      • Brake actuator assembly

      • Occupant detection ECU

      • Rack and pinion power steering gear assembly

      • Forward recognition camera

      • Millimeter wave radar sensor assembly

      • Radio and display receiver assembly

      • ECM

      		 ABS/VSC/TRC Deceleration Sensor
      Deceleration Sensor2
      Occupant Detection Yaw Rate/G Sensor Invalid Flag1
      Yaw Rate/G Sensor Invalid Flag2
      Ignition switch condition Main body ECU (multiplex network body ECU) Multiplex tilt and telescopic ECU

      • Certification ECU (smart key ECU assembly)

      • Rear television camera assembly

      • Radio and display receiver assembly

      • Meter mirror sub-assembly

      • Position control ECU assembly RH

      • Headlight ECU sub-assembly LH

      • Headlight ECU sub-assembly RH

      • Outer mirror control ECU assembly (for driver side)

      • Outer mirror control ECU assembly (for front passenger side)

      		 Main Body IG SW
      Tilt&Telescopic Ignition Switch (CAN)
      Side turn signal Combination meter assembly

      • Blind spot monitor sensor RH

      • Forward recognition camera

      • Millimeter wave radar sensor assembly

      • Main body ECU (multiplex network body ECU)

      • Radio and display receiver assembly

      • Headlight ECU sub-assembly LH

      • Headlight ECU sub-assembly RH

      		 Combination Meter Turn Signal Switch (Left)
      Turn Signal Switch (Right)
      Blind Spot Monitor Master Turn Switch State
      LKA/LDA Turn Signal Switch (Right)
      Turn Signal Switch (Left)
      Pre-Collision 2 Turn Light RH
      Turn Light LH
      Solar sensor Main body ECU (multiplex network body ECU) Air conditioning amplifier assembly - Air Conditioner Solar Sensor (D Side)
      Solar Sensor (P Side)
      ECM power source voltage*1 ECM - - Engine and ECT*4 Battery Voltage
      Engine*5*6 BATT Voltage
      Combination meter assembly power source voltage*1 Combination meter assembly - - Combination Meter +B Voltage
      Rack and pinion power steering gear assembly power source voltage*1 Rack and pinion power steering gear assembly - - EMPS IG Power Supply
      Driver door touch sensor*1 Certification ECU (smart key ECU assembly) - - Entry&Start D-Door Touch Sensor
      Radio and display receiver assembly power source voltage*1 Radio and display receiver assembly - - Navigation System Battery Voltage
      Meter mirror sub-assembly power source voltage*1 Meter mirror sub-assembly - - Head Up Display +B Voltage
      Outer mirror control ECU assembly (for driver side) power source voltage*1 Outer mirror control ECU assembly (for driver side) - - Mirror R +B Voltage Input Value
      Outer mirror control ECU assembly (for front passenger side) power source voltage*1 Outer mirror control ECU assembly (for front passenger side) - - Mirror L +B Voltage Input Value
      Position control ECU assembly RH power source voltage*1 Position control ECU assembly RH - - Driver Seat Battery Voltage Value
      Headlight ECU sub-assembly LH power source voltage*1 Headlight ECU sub-assembly LH - - HL AutoLeveling +B Voltage Value
      Headlight ECU sub-assembly RH power source voltage*1 Headlight ECU sub-assembly RH - - HL AutoLeveling (Sub) +B Voltage Value
      Multiplex tilt and telescopic ECU power source voltage*1 Multiplex tilt and telescopic ECU - - Tilt&Telescopic ECU Power Source Voltage

      • *1: Whether the ECU that sends data is functioning or not can be judged by using the GTS to check items such as switches or sensors that send signals to the ECU via direct lines.

      • *2: Although the received contents cannot be checked in the Data List, whether or not the data is received normally can be checked by observing the combination meter assembly.

      • *3: The combination meter assembly receives a vehicle speed signal from the skid control ECU and sends the signal to other ECUs.

      • *4: for 2AR-FE

      • *5: for 2GR-FKS

      • *6: for A25A-FKS

      • *7: for LHD

      • *8: for RHD

      • *9: According to the display on the GTS, read the Data List.


        • Enter the following menus: Powertrain / Engine and ECT / Data List.

          Click here

        • Enter the following menus: Powertrain / Engine / Data List.

          for 2GR-FKS:Click here

          for A25A-FKS:Click here

        • Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

          Click here

        • Enter the following menus: Chassis / EMPS / Data List.

          Click here

        • Enter the following menus: Body Electrical / Combination Meter / Data List.

          Click here

        • Enter the following menus: Body Electrical / Air Conditioner / Data List.

          Click here

        • Enter the following menus: Body Electrical / Navigation System / Data List.

          for Audio and Visual System:Click here

          for Navigation System:Click here

        • Enter the following menus: Body Electrical / Blind Spot Monitor Master / Data List.

          Click here

        • Enter the following menus: Body Electrical / Power Source Control / Data List.

          Click here

        • Enter the following menus: Body Electrical / Starting Control / Data List.

          Click here

        • Enter the following menus: Body Electrical / Main Body / Data List.

          Click here

        • Enter the following menus: Chassis / LKA/LDA / Data List.

          Click here

        • Enter the following menus: Body Electrical / Occupant Detection / Data List.

          Click here

        • Enter the following menus: Powertrain / Radar Cruise2 / Data List.

          for 2AR-FE:Click here

          except 2AR-FE:Click here

        • Enter the following menus: Body Electrical / SRS Airbag / Data List.

          Click here

        • Enter the following menus: Body Electrical / Entry&Start / Data List.

          Click here

        • Enter the following menus: Body Electrical / Pre-Collision 2 / Data List.

          Click here

        • Enter the following menus: Body Electrical / IPA/ICS/Clearance Sonar / Data List.

          Click here

        • Enter the following menus: Body Electrical / Head Up Display / Data List.

          Click here

        • Enter the following menus: Body Electrical / HL AutoLeveling / Data List.

          Click here

        • Enter the following menus: Body Electrical / HL AutoLeveling (Sub) / Data List.

          Click here

        • Enter the following menus: Body Electrical / Driver Seat / Data List.

          Click here

        • Enter the following menus: Body Electrical / Tilt&Telescopic / Data List.

          Click here

        • Enter the following menus: Body Electrical / Mirror L / Data List.

          Click here

        • Enter the following menus: Body Electrical / Mirror R / Data List.

          Click here