CAN COMMUNICATION SYSTEM(for RHD) DIAGNOSIS SYSTEM


  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 on the vehicle.

      Tech Tips

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

      Bus ECU/Sensor Name GTS Display Installed on
      V Bus Central gateway ECU (network gateway ECU) CAN gateway1 All vehicles
      Bus 2 ECM ECM (Engine) All vehicles
      Parking brake ECU assembly Electric Parking Brake All vehicles
      Air conditioning amplifier assembly Air Conditioning Amplifier All vehicles
      Torque vectoring differential ECU assembly TVD All vehicles
      Brake actuator assembly (skid control ECU) Skid Control (ABS/VSC/TRC) All vehicles
      Main body ECU (multiplex network body ECU) Main Body All vehicles
      Spiral cable with sensor sub-assembly (steering angle sensor) Spiral cable (Steering Angle Sensor) All vehicles
      Certification ECU (smart key ECU assembly) Certification (Smart) All vehicles
      Yaw rate and acceleration sensor (yaw rate sensor) Yaw Rate Sensor All vehicles
      Headlight light control ECU sub-assembly LH Headlight swivel (AFS) All vehicles
      Airbag ECU assembly Airbag All vehicles
      Stereo component equalizer assembly ASC All vehicles
      Combination meter mirror ECU Head Up Display Vehicles with a headup display
      Power steering ECU assembly Power Steering (EPS) All vehicles
      Combination meter assembly Combination Meter All vehicles
      Bus 3 Radio receiver assembly Display and Navigation (AVN1) All vehicles
      Bus 4 ECM ECM (Engine) All vehicles
      Roll rate and vertical acceleration sensor (yaw rate sensor) Vertical Acceleration Sensor All vehicles
      Driving support ECU assembly Driving Support (Cruise Control-ACC) Vehicles with a pre-crash safety system
      Brake actuator assembly (skid control ECU) Skid Control (ABS/VSC/TRC) All vehicles
      Torque vectoring differential ECU assembly TVD All vehicles
      Bus 5 Blind spot monitor sensor RH Blind Spot Monitor Master Vehicles with a blind spot monitor system
      Clearance warning ECU assembly Clearance Warning (Clearance Sonar) Vehicles with a LEXUS parking assist-sensor system
      Forward recognition camera Front Camera Module Vehicles with a pre-crash safety system
      Driving support ECU assembly Driving Support (Cruise Control-ACC) Vehicles with a pre-crash safety system
      Millimeter wave radar sensor assembly Front Radar Vehicles with a pre-crash safety system
      Absorber control ECU Suspension Control (Air Suspension) All vehicles
      Sub Bus 1 Main body ECU (multiplex network body ECU) Main Body All vehicles
      Luggage closer motor assembly Back Door Vehicles with a power trunk lid system
      Multiplex network door ECU Back Door Vehicles without a power trunk lid system
      Position control ECU and switch assembly RH D-Seat All vehicles
      Position control ECU and switch assembly LH P-Seat All vehicles
      Front multiplex network door ECU LH Front Door LH (FL-Door2) All vehicles
      Front multiplex network door ECU RH Front Door RH (FR-Door2) All vehicles
      Multiplex tilt and telescopic ECU Multiplex Tilt and Telescopic All vehicles

  2. CAN BUS CHECK

    Tech Tips

    The ECUs and sensors that are properly connected to the CAN communication system can be displayed using the GTS.


    1. Using the GTS, select the CAN Bus Check screen.


      CAN Bus Check

      Note


      • It may be possible to select buses that do not have ECUs or sensors from the bus selection pull-down menu. This is not a malfunction. (This occurs when optional devices are not on a sub bus that is monitored by a gateway function equipped ECU.)

      • In the bus selection pull down menu, all buses applicable to the model are displayed (e.g. LIN communication buses are also displayed). Therefore, refer to the wiring diagrams to check the names of sub buses for CAN communication.

        Click here

      Tech Tips

      Different connection statuses are indicated by the background color of ECUs and sensors that are displayed.

      Explanation of CAN 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 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, 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 and V bus (the bus that connects the DLC3 to the central gateway ECU) for malfunctions.

    2. Observe the connection response screen for approximately 2 minutes to check for a change in connection status of the connected ECUs and sensors.

      Tech Tips


      • If an open occurs in one of the lines of a CAN branch (except DLC3), output from the other branch line (the line that is not open) will be unstable and it may interfere with the response (display) of other ECUs and sensors.

      • If the connection status changes during the inspection, repair the open in the branch line of the ECU or sensor that does not respond (is not detected) and then perform the CAN bus check again.

  3. HOW TO INTERPRET CAN BUS CHECK SCREEN


    1. When a communication stop is currently occurring, the probable malfunctioning part can be determined from the CAN bus check and by using the following methods.

      Note

      The following CAN bus wiring diagram is provided only as an example. This wiring diagram is different from the actual wiring diagram for this vehicle.

      Tech Tips


      • When a communication stop is currently occurring, it is easier to determine the probable malfunctioning part from the CAN bus check rather than from communication DTCs.

      • Wait for approximately 2 minutes after turning the ignition switch on (IG) (or simulate the driving conditions that enable the malfunction to be reproduced) and select "CAN Bus Check". Then observe the communication status of each ECU on the screen.

    2. If a communication error of only 1 ECU or sensor is indicated on the CAN Bus Check screen, a communication stop of the ECU or sensor is suspected.

      Open in both CAN branch lines of HV on the bus 4

      B002DRWC01
      *a Bus 2 *b Bus 4
      *c Sub Bus *d V Bus
      *e Location of Malfunction *f Background color is red

      Tech Tips

      When there are communication stops, ECUs that are present in the vehicle may not be displayed on the CAN Bus Check screen.

    3. If communication errors for multiple ECUs or sensors are indicated on the CAN Bus Check screen, then a communication stop of the ECU or sensor that shows a more serious communication stop (an ECU or sensor whose background color is red) is suspected.

      Example: Open in a CAN branch line for HV on the bus 4

      B002DMNC01
      *a Background color is red *b Background color intermittently becomes yellow or red
      *c Not displayed or background color is yellow or red - -
      Explanation of CAN 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.

      • The example of the CAN Bus Check screen in the illustration shows the result of electrical noise on the CAN bus which is caused by an open in a CAN branch line of HV is also unstable. In addition, in this example, MB is equipped with a gateway function. Therefore, communication is also unstable between the Sub bus ECUs of MB and the bus 4.

      • The example in the illustration shows that HV has a red background color on the CAN Bus Check screen. This indicates a more significant communication stop. In this case, a communication stop of HV is suspected.

    4. If a communication error is indicated on both the bus 4 and Sub bus on the CAN Bus Check screen, suspect any communication stop displayed for the bus 4 first.

      Example: Open in both CAN branch lines of MB on the bus 4

      B002COPC01
      *a Background color is red *b Not displayed

      Tech Tips


      • In the CAN bus check, it is possible to confirm the communication status of ECUs connected to the bus after connecting the GTS to the DLC3. As for sub bus, it is possible to confirm which sub bus connected ECUs can communicate with a gateway function equipped ECU on the bus.

      • If a gateway function equipped ECU has a communication error, ECUs connected to the gateway function equipped ECU are also affected, and communication stops will be indicated.

      • The CAN Bus Check screen in the illustration shows that ECU G has a gateway function and a communication stop in ECU G is suspected.

    5. If the CAN Bus Check screen indicates a communication stop only in the sub bus, a communication stop in the sub bus is suspected.

      Example: Open in both CAN branch lines of MIR-R on the sub bus

      B002COBC01
      *a Background color is red - -

      Tech Tips


      • A communication error in a sub bus does not affect the other buses.

      • When a gateway function equipped ECU has memorized the ECUs that are connected to the sub bus, if any of the ECUs connected to the gateway function equipped ECU has a communication error, the background color changes to yellow or red. (The displayed name will not disappear.)

    6. If both of the bus 2 main bus lines are open, ECUs or sensors that are located farther away from the central gateway ECU than the open part will be displayed as a communication stop on the CAN Bus Check screen.

      (In this case, HVB, R-MGC and ENG background color changes to red.)

      B002ENGC01
      *a Bus 2 *b Bus 4
      *c Sub Bus *d V Bus
      *e Location of Malfunction *f Background color is red

      Tech Tips

      If a communication error occurs in an ECU, it is not displayed on the CAN Bus Check screen even though the ECU is present.

    7. If both of the sub bus main bus lines are open, ECUs that are located farther away from the gateway function equipped ECU than the open part will be displayed as a communication stop on the CAN Bus Check screen.

      (In this case, MIR-L background color changes to red.)

      B002DZZC01
      *a Bus 2 *b Bus 4
      *c Sub Bus *d V Bus
      *e Location of Malfunction *f Background color is red

    8. When any of the following malfunctions occur, CAN communication cannot be established and almost all ECUs and sensors on the bus show a communication error on the CAN Bus Check screen.

      Details of Malfunction
      Short between CAN lines (CANH and CANL)
      Short between a CAN line (CANH or CANL) and +B
      Short between a CAN line (CANH or CANL) and ground
      Open in a CAN main bus line
      B002DH0C01
      *a When any of the following malfunctions occur on the bus 4 *b When any of the following malfunctions occur on a sub bus
      *c Background color is red *d Not displayed

      Tech Tips


      • When a malfunction occurs in the bus, almost all ECUs and sensors on the bus and sub bus indicate a communication error (almost all ECUs are not displayed). As communication with the gateway function equipped ECU that is connected to the bus stops, communication from the ECUs connected to the sub bus that is monitored by the gateway function equipped ECU also stops (these ECUs are not displayed).

      • When a malfunction occurs in a sub bus, almost all ECUs connected to the sub bus indicate a communication error.

      • A communication error in a sub bus does not affect the other buses.

      • The malfunctioning part can be determined by checking for a short circuit between CAN bus lines or between a CAN bus line and ground or +B short using an electrical tester.

    9. If a communication error of all ECUs and sensors is indicated on the CAN Bus Check screen, a communication stop of the V bus (DLC3 - central gateway ECU) is suspected.

      Open in both CAN branch lines in the V bus

      B002D1IC01
      *a Bus 2 *b Bus 4
      *c Sub Bus *d V Bus
      *e Location of Malfunction *f Not displayed

      Tech Tips

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

  4. HOW TO INTERPRET COMMUNICATION DTCS (DTCS THAT START WITH U)


    1. If a CAN communication error cannot be reproduced, determine the suspected malfunctioning part using the DTCs stored in ECUs that are connected to the CAN buses by following the procedure below.

      Tech Tips

      Communication DTCs (DTCs that start with U) indicate a communication error between the ECU that stores the DTC and the ECU that is indicated by the DTC.


      1. If multiple ECUs store a communication DTC for a particular ECU, a communication stop of the ECU is suspected.

        B002F0MC04
        *a Items to be checked - -

        Note


        • This DTC table is from another model, and is only used here to show an example of DTCs that are output when there is an open in a CAN branch wire for the main body ECU. This table does not show DTCs applicable to this vehicle.

        • Even though a DTC title may indicate a communication error with a specific ECU, the ECU name used in the DTC name on the GTS may differ depending on the ECU that stores the DTC. (Regarding output DTCs, refer to step 6 and the DTC chart for each ECU.)

        Tech Tips

        As multiple ECUs indicate a communication stop with the main body ECU, the possibility of a communication stop of the main body ECU is high.

      2. If almost all of the communication DTCs of an ECU are stored, a communication stop of the ECU is suspected.

        B002CF0C01
        *a Items to be checked - -

        Note

        This DTC table is from another model, and is only used here to show an example of DTCs that are output when there is an open in a CAN branch wire for the main body ECU. This table does not show DTCs applicable to this vehicle.

        Tech Tips


        • If almost all of the DTCs of the main body ECU are stored, the possibility of a communication stop of the main body ECU is high.

        • When a CAN communication error occurs, many DTCs are output. DTCs other than communication error DTCs (such as DTCs that start with C or B) and communication DTCs for the ABS system are important DTCs, however it may be easier to determine the malfunctioning part by examining the overall situation without considering these DTCs.

    2. To help determine the part of the non-bus 2 that has a communication error, prioritize the communication stop DTCs stored in the gateway function equipped ECU.

      B002EC0C02
      *a Items to be checked *b ECM
      *c Gateway Function Equipped ECU *d Location of Malfunction
      *e Bus 2 *f Non-bus 2

      Note

      This DTC table is from another model, and is only used here to show the ECUs connected to both the bus 2 and a non-bus 2. It shows DTCs output when there is an open in the main wires for the ECM on the non-bus 2. This table does not show DTCs applicable to this vehicle.

      Tech Tips


      • As gateway function equipped ECUs (non-bus 2 monitor ECU) monitor signals from all ECUs that are connected to non-bus 2, gateway function equipped ECUs can detect ECUs with a communication stop more accurately.

      • When there is a communication stop for the gateway function equipped ECU (gateway), communication with ECUs connected to other buses such as the bus 2 stops. Therefore, communication DTCs for ECUs connected to other buses are also stored.

    3. When any of the following malfunctions occurs, many DTCs are likely to be output from many ECUs. Because of this, it may be difficult to determine the probable malfunctioning part.


      • Short between CAN wires (CANH and CANL)

      • Short between a CAN wire (CANH or CANL) and ground

      • Short between a CAN wire (CANH or CANL) and +B

      • Open in a CAN branch wire (CANH or CANL) of an ECU or sensor

      • Open in a CAN main wire (CANH or CANL) between 2 ECUs that have a terminating resistor

  5. DTC TABLE BY ECU

    Tech Tips


    • 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 trouble cannot be determined solely from the DTCs. Perform troubleshooting according to "How to Proceed with Troubleshooting".

      Click here

    • If system function temporarily returns to normal, DTCs may not be output again even though the following DTC check procedures are used.


    1. ECM / GTS Display "Engine"


      Powertrain > Engine > Trouble Codes

      Tech Tips


      • DTC communication uses the CAN communication system.

      • *1: Refer to SFI System.

        w/ Canister Pump Module: Click here

        w/o Canister Pump Module: Click here

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0101*1 Lost Communication with TCM The ECM does not receive data from the TCM for approximately 2 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG) for 1 second or more.

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

      		 Turn the engine switch on (IG) and wait at least approximately 3 seconds. MIL illuminates. - DTC is stored until it is cleared using the GTS.

    2. Brake actuator assembly (skid control ECU) / GTS Display "ABS/VSC/TRC"


      Chassis > ABS/VSC/TRC > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0073 Control Module Communication Bus OFF

      One of the following conditions is met:


      • Delayed reception of data from the spiral cable with sensor sub-assembly (steering angle sensor) and yaw rate and acceleration sensor (yaw rate sensor) continues for approximately 1 second or more.

      • The following condition occurs 10 times or more within approximately 60 seconds:


        • Delayed reception of data from the spiral cable with sensor sub-assembly (steering angle sensor) and yaw rate and acceleration sensor (yaw rate sensor) occurs once or more within approximately 5 seconds.

      • The following condition occurs 10 times in succession:


        • The brake actuator assembly (skid control ECU) cannot send/receive data (bus off) once or more within approximately 1 second.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 1 second or more.

      • The power source voltage (+BS terminal voltage) of the brake actuator assembly (skid control ECU) is between 10 and 17.4 V.

      		 Turn the engine switch on (IG) and wait at least approximately 60 seconds.

      • ABS warning light illuminates.

      • SLIP indicator light illuminates.

      • Brake warning light illuminates.

      		 - DTC is stored until it is cleared using the GTS.
      U0100 Lost Communication with ECM / PCM The brake actuator assembly (skid control ECU) does not receive data from the ECM for approximately 2 seconds or more.

      All conditions are met:


      • The engine switch is on (IG) for approximately 1 second or more.

      • Vehicle speed is 15 km/h (9 mph) or more.

      • The power source voltage (+BS terminal voltage) of the brake actuator assembly (skid control ECU) is between 10 and 17.4 V.

      		 Turn the engine switch on (IG) and drive the vehicle at a speed of 15 km/h (9 mph) or more for approximately 3 seconds or more. Check that the warning light remains off after the initial light check. SLIP indicator light illuminates. - DTC is stored until it is cleared using the GTS.
      U0123 Lost Communication with Yaw Rate Sensor Module

      Either of the following conditions is met:


      • The brake actuator assembly (skid control ECU) does not receive data from the yaw rate and acceleration sensor (yaw rate sensor) for approximately 1 second or more.

      • The following condition occurs 10 times or more within approximately 60 seconds:


        • The brake actuator assembly (skid control ECU) does not receive data from the yaw rate and acceleration sensor (yaw rate sensor) once or more within approximately 5 seconds.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 1 second or more.

      • The power source voltage (+BS terminal voltage) of the brake actuator assembly (skid control ECU) is between 10 and 17.4 V.

      		 Turn the engine switch on (IG) and wait at least approximately 60 seconds. SLIP indicator light illuminates. - DTC is stored until it is cleared using the GTS.
      U0124 Lost Communication with Lateral Acceleration Sensor Module

      Either of the following conditions is met:


      • The brake actuator assembly (skid control ECU) does not receive data from the yaw rate and acceleration sensor (yaw rate sensor) for approximately 1 second or more.

      • The following condition occurs 10 times or more within approximately 60 seconds:


        • The brake actuator assembly (skid control ECU) does not receive data from the yaw rate and acceleration sensor (yaw rate sensor) once or more within approximately 5 seconds.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 1 second or more.

      • The power source voltage (+BS terminal voltage) of the brake actuator assembly (skid control ECU) is between 10 and 17.4 V.

      		 Turn the engine switch on (IG) and wait at least approximately 60 seconds.

      • ABS warning light illuminates.

      • SLIP indicator light illuminates.

      		 - DTC is stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module

      Either of the following conditions is met:


      • The brake actuator assembly (skid control ECU) does not receive data from the spiral cable with sensor sub-assembly (steering angle sensor) for approximately 1 second or more.

      • The following condition occurs 10 times or more within approximately 60 seconds:


        • The brake actuator assembly (skid control ECU) does not receive data from the spiral cable with sensor sub-assembly (steering angle sensor) once or more within approximately 5 seconds.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 1 second or more.

      • The power source voltage (+BS terminal voltage) of the brake actuator assembly (skid control ECU) is between 10 and 17.4 V.

      		 Turn the engine switch on (IG) and wait at least approximately 60 seconds. SLIP indicator light illuminates. - DTC is stored until it is cleared using the GTS.

    3. Combination meter assembly / GTS Display "Combination Meter"


      Body Electrical > Combination Meter > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 Lost Communication with ECM / PCM "A" The combination meter assembly does not receive data from the ECM for approximately 2 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The power source voltage of the combination meter assembly is 9.5 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 2 seconds. - - DTC is stored until it is cleared using the GTS.
      U0129 Lost Communication with Brake System Control Module The combination meter assembly does not receive data from the brake actuator assembly (skid control ECU) for approximately 3 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The power source voltage of the combination meter assembly is 9.5 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 3 seconds. - - DTC is stored until it is cleared using the GTS.
      U0131 Lost Communication with Power Steering Control Module The combination meter assembly does not receive data from the power steering ECU assembly for approximately 3 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The power source voltage of the combination meter assembly is 9.5 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 3 seconds. EPS warning light illuminates. - DTC is stored until it is cleared using the GTS.
      U0142 Lost Communication with Body Control Module "B" The combination meter 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 engine switch is on (IG).

      • The power source voltage of the combination meter assembly is 9.5 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 3 seconds. - - DTC is stored until it is cleared using the GTS.
      U0151 Lost Communication with Restraints Control Module The combination meter assembly does not receive data from the airbag ECU assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The power source voltage of the combination meter assembly is 9.5 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 10 seconds. SRS warning light illuminates. Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U0163 Lost Communication with Navigation Control Module The combination meter assembly does not receive data from the radio receiver assembly for approximately 3 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The power source voltage of the combination meter assembly is 9.5 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 3 seconds. - - DTC is stored until it is cleared using the GTS.
      U0182 Lost Communication with Lighting Control Module Front The combination meter assembly does not receive data from the headlight light control ECU sub-assembly LH for approximately 10 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The power source voltage of the combination meter assembly is 9.5 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.
      U023A Lost Communication with Front Camera Module The combination meter assembly does not receive data from the forward recognition camera for approximately 10 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The power source voltage of the combination meter assembly is 9.5 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 10 seconds. - Displays messages on the multi-information display. DTC is stored until it is cleared using the GTS.
      U1104 Lost Communication with Driving Support ECU The combination meter assembly does not receive data from the driving support ECU assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The power source voltage of the combination meter assembly is 9.5 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 10 seconds. PCS warning light flashes. - DTC is stored until it is cleared using the GTS.

    4. Air conditioning amplifier assembly / GTS Display "Air Conditioner"


      Body Electrical > Air Conditioner > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 Lost Communication With ECM/PCM "A" The air conditioning amplifier assembly is unable to receive certain data from the ECM for approximately 5 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The air conditioning amplifier assembly power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 5 seconds. - - The DTC remains stored until it is cleared using the GTS.
      U0131 Lost Communication With Power Steering Control Module The air conditioning amplifier assembly is unable to receive certain data from the power steering ECU assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The air conditioning amplifier assembly power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 5 seconds. - - The DTC remains stored until it is cleared using the GTS.
      U0142 Lost Communication With Body Control Module "B" The air conditioning amplifier assembly is unable to receive certain data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The air conditioning amplifier assembly power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 5 seconds. - - The DTC remains stored until it is cleared using the GTS.
      U0155 Lost Communication With Instrument Panel Cluster (IPC) Control Module The air conditioning amplifier assembly is unable to receive certain data from the combination meter assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The air conditioning amplifier assembly power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 5 seconds. - - The DTC remains stored until it is cleared using the GTS.
      U0163 Lost Communication with Navigation Control Module The air conditioning amplifier assembly is unable to receive certain data from the radio receiver assembly for approximately 5 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The air conditioning amplifier assembly power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 5 seconds. - - The DTC remains stored until it is cleared using the GTS.

    5. Power steering ECU assembly / GTS Display "EMPS"


      Chassis > EMPS > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 Lost Communication with ECM / PCM "A" The power steering ECU assembly does not receive data from the ECM for approximately 5 minutes or more.

      All conditions are met:


      • The engine switch is on (IG) for approximately 3 seconds or more.

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

      • The power source voltage of the power steering ECU assembly is 9 V or more.

      		 Drive the vehicle at a speed of 20 km/h (12 mph) or more for approximately 5 minutes or more. EPS warning light illuminates. - DTC remains stored only while malfunction is occurring.
      U0129 Lost Communication with Brake System Control Module The power steering ECU assembly does not receive data from the brake actuator assembly (skid control ECU) for approximately 3 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 3 seconds or more.

      • The power source voltage of the power steering ECU assembly is 9 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 6 seconds. EPS warning light illuminates. - DTC remains stored only while malfunction is occurring.
      U0132 Lost Communication with Ride Level Control Module The power steering ECU assembly is unable to receive certain data from the absorber control ECU for approximately 7 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 3 seconds or more.

      • The power source voltage of the power steering ECU assembly is 9 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 10 seconds. - - DTC remains stored only while malfunction is occurring.
      U1104 Lost Communication with Driving Support ECU The power steering ECU assembly does not receive data from the forward recognition camera for approximately 2 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 3 seconds or more.

      • The power source voltage of the power steeringECU assembly is 9 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 5 seconds. - - DTC remains stored only while malfunction is occurring.

    6. Headlight Light Control ECU Sub-assembly LH / GTS Display "AFS"


      Body Electrical > AFS > Trouble Codes

      Tech Tips


      • DTC communication uses the CAN communication system.

      • *1: Refer to Lighting System.

        Click here

      DTC No. Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0073 Control Module Communication Bus OFF The headlight light control ECU sub-assembly LH does not send/receive data.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 3 seconds or more.

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

      		 Turn the engine switch on (IG) 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 light control ECU sub-assembly LH does not receive data from the ECM for approximately 10 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 3 seconds or more.

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

      		 Turn the engine switch on (IG) 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 light control ECU sub-assembly LH does not receive data from the ECM for approximately 10 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 3 seconds or more.

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

      		 Turn the engine switch on (IG) and wait for at least approximately 13 seconds. - - DTC is stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module The headlight light control ECU sub-assembly LH does not receive data from the spiral cable with sensor sub-assembly (steering angle sensor) for approximately 5 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 3 seconds or more.

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

      		 Turn the engine switch on (IG) and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.
      U0129 Lost Communication with Brake System Control Module The headlight light control ECU sub-assembly LH does not receive data from the brake actuator assembly (skid control ECU) for approximately 5 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 3 seconds or more.

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

      		 Turn the engine switch on (IG) and wait for at least approximately 8 seconds. - - DTC is stored until it is cleared using the GTS.
      U0142 Lost Communication with Body Control Module "B" The headlight light control 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 engine switch is on (IG) for approximately 3 seconds or more.

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

      		 Turn the engine switch on (IG) and wait for at least approximately 13 seconds. - - DTC is stored until it is cleared using the GTS.
      U023A Lost Communication with Image Processing Module "A" The headlight light control ECU sub-assembly LH does not receive data from the forward recognition camera assembly for approximately 10 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 3 seconds or more.

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

      		 Turn the engine switch on (IG) and wait for at least approximately 13 seconds. - - DTC is stored until it is cleared using the GTS.
      U0242*1 Lost Communication with Headlamp Control Module "B" The headlight light control ECU sub-assembly LH does not receive data from the headlight light control ECU sub-assembly RH for approximately 10 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 3 seconds or more.

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

      		 Turn the engine switch on (IG) and wait for at least approximately 13 seconds. - - DTC is stored until it is cleared using the GTS.
      U1000*1 CAN Communication Failure (Message Registry) When the engine switch is turned on (IG), a CAN communication malfunction is detected.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 3 seconds or more.

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

      		 Turn the engine switch on (IG) and wait for at least approximately 3 seconds. - - DTC remains stored only while malfunction is occurring.

    7. Main body ECU (multiplex network body ECU) / GTS Display "Main Body"


      Body Electrical > Main Body > Trouble Codes

      Tech Tips


      • DTC communication uses the CAN communication system.

      • *1: w/ Power Trunk Lid System

      • *2: w/o Power Trunk Lid System

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      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:


      • 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 V or more.

      		 Turn the engine switch on (IG) and wait 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:


      • 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 V or more.

      		 Turn the engine switch on (IG) and wait 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 V or more.

      		 Turn the engine switch on (IG) and wait 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 (skid control 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 main body ECU (multiplex network body ECU) is 10 V or more.

      		 Turn the engine switch on (IG) and wait 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 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 V or more.

      		 Turn the engine switch on (IG) and wait 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 V or more.

      		 Turn the engine switch on (IG) and wait 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:


      • 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 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0182 Lost Communication with Lighting Control Module Front The main body ECU (multiplex network body ECU) does not receive data from the headlight light control ECU sub-assembly LH 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 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 20 seconds. - - 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 front multiplex network door ECU RH 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 V or more.

      		 Turn the engine switch on (IG) and wait 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 front multiplex network door ECU LH 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 V or more.

      		 Turn the engine switch on (IG) and wait 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 and switch assembly RH 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 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0209 Lost Communication with "Seat Control Module B" The main body ECU (multiplex network body ECU) does not receive data from the position control ECU and switch assembly LH 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 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U0230 Lost Communication with Rear Gate Module

      • The main body ECU (multiplex network body ECU) does not receive data from the luggage closer motor assembly for approximately 10 seconds or more.*1

      • The main body ECU (multiplex network body ECU) does not receive data from the multiplex network door ECU for approximately 10 seconds or more.*2

      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 V or more.

      		 Turn the engine switch on (IG) and wait 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:


      • 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 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 20 seconds. - - 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 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.
      U1002 Lost Communication with Gateway Module (Main body) The main body ECU (multiplex network body ECU) detects communication errors between itself and the position control ECU and switch assembly LH, position control ECU and switch assembly RH, luggage closer motor assembly*3, multiplex network door ECU*4, position control ECU and switch assembly LH, position control ECU and switch assembly RH and multiplex tilt and telescopic ECU.

      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 V or more.

      		 Turn the engine switch on (IG) and wait 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 parking brake 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 V or more.

      		 Turn the engine switch on (IG) and wait 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:


      • 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 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 20 seconds. - - DTC is stored until it is cleared using the GTS.

    8. Certification ECU (smart key ECU assembly) / GTS Display "Entry&Start"


      Body Electrical > Entry&Start > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 Lost Communication With ECM/PCM "A" The certification ECU (smart key ECU assembly) is unable to receive certain data from the ECM for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 10 seconds or more elapse after a power source mode change is detected (+B changes from off to on, ACC changes between on and off, or IG changes between on and off).

      • The certification ECU (smart key ECU assembly) power supply voltage is 10 V or higher.

      		 Wait approximately 20 seconds after turning the engine switch on (ACC) or on (IG). - - The DTC remains stored until it is cleared using the GTS.
      U0142 Lost Communication with Body Control Module "B" The certification ECU (smart key ECU assembly) is unable to receive certain data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 10 seconds or more elapse after a power source mode change is detected (+B changes from off to on, ACC changes between on and off, or IG changes between on and off).

      • The certification ECU (smart key ECU assembly) power supply voltage is 10 V or higher.

      		 Wait approximately 20 seconds after turning the engine switch on (ACC) or on (IG). - - The DTC remains 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) is unable to receive certain data from the combination meter assembly for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 10 seconds or more elapse after a power source mode change is detected (+B changes from off to on, ACC changes between on and off, or IG changes between on and off).

      • The certification ECU (smart key ECU assembly) power supply voltage is 10 V or higher.

      		 Wait approximately 20 seconds after turning the engine switch on (ACC) or on (IG). - - The DTC remains stored until it is cleared using the GTS.

    9. Certification ECU (smart key ECU assembly) / GTS Display "Power Source Control"


      Body Electrical > Power Source Control > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 ECM Communication The certification ECU (smart key ECU assembly) is unable to receive certain data from the ECM for approximately 4 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The certification ECU (smart key ECU assembly) power supply voltage is 9.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 4 seconds. - - The DTC remains stored until it is cleared using the GTS.
      U0140 Lost Communication with Body Control Module The certification ECU (smart key ECU assembly) is unable to receive certain data from the main body ECU (multiplex network body ECU) for approximately 3 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The certification ECU (smart key ECU assembly) power supply voltage is 9.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 3 seconds. - - The DTC remains 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) is unable to receive certain data from the combination meter assembly for approximately 4 seconds or more.

      Both conditions are met:


      • The engine switch is on (IG).

      • The certification ECU (smart key ECU assembly) power supply voltage is 9.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 4 seconds. - - The DTC remains stored until it is cleared using the GTS.

    10. Certification ECU (smart key ECU assembly) / GTS Display "Starting Control"


      Body Electrical > Starting Control > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 ECM Communication The certification ECU (smart key ECU assembly) is unable to receive certain data from the ECM for approximately 2 seconds or more. The engine switch is on (IG). Turn the engine switch on (IG) and wait at least approximately 2 seconds. - - The DTC remains stored until it is cleared using the GTS.

    11. Radio receiver assembly / GTS Display "Navigation System"


      Body Electrical > Navigation System > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0073 Sending Malfunction (Navigation to APGS) The radio receiver assembly is unable to send or receive data 10 times consecutively. - Turn the engine switch on (IG) and wait at least approximately 1 second. - - The DTC remains stored until it is cleared using the GTS.
      U0100 Engine ECU Communication

      Either condition is met:


      • The radio receiver assembly is unable to receive certain data from the ECM for approximately 12 seconds or more.

      • While the vehicle is being driven at a speed of 20 km/h (12 mph) or more after the navigation system starts, the radio receiver assembly is unable to receive certain data from the ECM for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 1 second or more elapses after turning the engine switch on (IG).

      • The radio receiver assembly power supply voltage is 9.5 V or higher.

      		 Drive the vehicle for approximately 10 seconds or more at a speed of 20 km/h (12 mph) or more. - - The DTC remains stored until it is cleared using the GTS.
      U0126 Steering Sensor Communication The radio receiver assembly is unable to receive certain data from the spiral cable with sensor sub-assembly (steering angle sensor) for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 1 second or more elapses after turning the engine switch on (IG).

      • The radio receiver assembly power supply voltage is 9.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 11 seconds. - - The DTC remains stored until it is cleared using the GTS.
      U0129 VSC (ECB) ECU Communication The radio receiver assembly is unable to receive certain data from the brake actuator assembly (skid control ECU) for 4 seconds or more.

      Both conditions are met:


      • Approximately 1 second or more elapses after turning the engine switch on (IG).

      • The radio receiver assembly power supply voltage is 9.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 5 seconds. - - The DTC remains stored until it is cleared using the GTS.
      U0140 Lost Communication with Body Control Module The radio receiver assembly is unable to receive certain data from the main body ECU (multiplex network body ECU) for approximately 3 seconds or more.

      Both conditions are met:


      • Approximately 1 second or more elapses after turning the engine switch on (IG).

      • The radio receiver assembly power supply voltage is 9.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 4 seconds. - - The DTC remains stored until it is cleared using the GTS.
      U0155 Meter ECU Communication The radio receiver assembly is unable to receive certain data from the combination meter assembly for approximately 30 seconds or more.

      Both conditions are met:


      • Approximately 1 second or more elapses after turning the engine switch on (IG).

      • The radio receiver assembly power supply voltage is 9.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 31 seconds. - - The DTC remains stored until it is cleared using the GTS.
      U0164 Air Conditioner ECU Communication The radio receiver assembly is unable to receive certain data from the air conditioning amplifier assembly for approximately 15 seconds or more.

      Both conditions are met:


      • Approximately 1 second or more elapses after turning the engine switch on (IG).

      • The radio receiver assembly power supply voltage is 9.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 16 seconds. - - The DTC remains stored until it is cleared using the GTS.
      U0233 Lost Communication with Blind Spot Monitor Master Module The radio receiver assembly is unable to receive certain data from the blind spot monitor sensor RH for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 1 second or more elapses after turning the engine switch on (IG).

      • The radio receiver assembly power supply voltage is 9.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 11 seconds. - - The DTC remains stored until it is cleared using the GTS.
      U1110 Clearance Sonar ECU Communication The radio receiver assembly is unable to receive certain data from the clearance warning ECU assembly for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 1 second or more elapses after turning the engine switch on (IG).

      • The radio receiver assembly power supply voltage is 9.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 11 seconds. - - The DTC remains stored until it is cleared using the GTS.

    12. Driving support ECU assembly (w/ Pre-crash Safety System) / GTS Display "Radar Cruise"


      Powertrain > Radar Cruise > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 Lost Communication with ECM/PCM "A" The driving support ECU assembly is unable to receive certain data from the ECM for approximately 1 second or more.

      All conditions are met:


      • Approximately 1 second or more elapse after turning the engine switch on (IG).

      • The vehicle speed is 36 km/h (22 mph) or more.

      • The driving support ECU assembly power supply voltage is 10 V or higher.

      		 Drive the vehicle for approximately 2 seconds or more at a speed of 36 km/h (22 mph) or more. - Displays messages on the multi-information display. The DTC remains stored until it is cleared using the GTS.
      U0125 Lost Communication with Yaw Rate Sensor Module The driving support ECU assembly is unable to receive certain data from the yaw rate and acceleration sensor (yaw rate sensor) for approximately 1 second or more.

      All conditions are met:


      • Approximately 3 seconds or more elapse after turning the engine switch on (IG).

      • The vehicle speed is 36 km/h (22 mph) or more.

      • The driving support ECU assembly power supply voltage is 10 V or higher.

      		 Drive the vehicle for approximately 4 seconds or more at a speed of 36 km/h (22 mph) or more. - Displays messages on the multi-information display. The DTC remains stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module The driving support ECU assembly is unable to receive certain data from the spiral cable with sensor sub-assembly (steering angle sensor) for approximately 6 seconds or more.

      All conditions are met:


      • Approximately 1 second or more elapse after turning the engine switch on (IG).

      • The vehicle speed is 36 km/h (22 mph) or more.

      • The driving support ECU assembly power supply voltage is 10 V or higher.

      		 Drive the vehicle for approximately 7 seconds or more at a speed of 36 km/h (22 mph) or more. - Displays messages on the multi-information display. The DTC remains stored until it is cleared using the GTS.
      U0129 Lost Communication with Brake System Control Module The driving support ECU assembly is unable to receive certain data from the brake actuator assembly (skid control ECU) for approximately 2 seconds or more.

      All conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch on (IG).

      • The vehicle speed is 36 km/h (22 mph) or more.

      • The driving support ECU assembly power supply voltage is 10 V or higher.

      		 Drive the vehicle for approximately 4 seconds or more at a speed of 36 km/h (22 mph) or more. - Displays messages on the multi-information display. The DTC remains stored until it is cleared using the GTS.
      U0235 Lost Communication with Cruise Control Front Distance Range Sensor The driving support ECU assembly is unable to receive certain data from the millimeter wave radar sensor assembly for approximately 2 seconds or more.

      All conditions are met:


      • Approximately 1 second or more elapse after turning the engine switch on (IG).

      • The vehicle speed is 36 km/h (22 mph) or more.

      • The driving support ECU assembly power supply voltage is 10 V or higher.

      		 Drive the vehicle for approximately 3 seconds or more at a speed of 36 km/h (22 mph) or more. - Displays messages on the multi-information display. The DTC remains stored until it is cleared using the GTS.
      U1104 Lost Communication with Driving Support ECU The driving support ECU assembly data sent to the millimeter wave radar sensor assembly is lost for approximately 1 second or more.

      All conditions are met:


      • Approximately 1 second or more elapse after turning the engine switch on (IG).

      • The vehicle speed is 36 km/h (22 mph) or more.

      • The driving support ECU assembly power supply voltage is 10 V or higher.

      		 Drive the vehicle for approximately 2 seconds or more at a speed of 36 km/h (22 mph) or more. - Displays messages on the multi-information display. The DTC remains stored until it is cleared using the GTS.

    13. Driving support ECU assembly (w/ Pre-crash Safety System) / GTS Display "Pre-crash 2"


      Body Electrical > Pre-Crash 2 > Trouble Codes

      Tech Tips


      • DTC communication uses the CAN communication system.

      • *1: Refer to Pre-crash Safety System

        Click here

      • *2: w/ Adaptive High Beam System

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 Lost Communication with ECM/PCM "A" The driving support ECU assembly is unable to receive certain data from the ECM for approximately 4 seconds or more.

      All conditions are met:


      • Approximately 3 seconds or more elapse after turning the engine switch on (IG).

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

      • The driving support ECU assembly power supply voltage is 10 V or higher.

      		 Drive the vehicle for approximately 7 seconds or more at a speed of 5 km/h (3 mph) or more. The PCS indicator blinks. Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U0125 Lost Communication with Yaw Rate Sensor Module The driving support ECU assembly is unable to receive certain data from the yaw rate and acceleration sensor (yaw rate sensor) for approximately 1 second or more.

      Both conditions are met:


      • Approximately 3 seconds or more elapse after turning the engine switch on (IG).

      • The driving support ECU assembly power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 4 seconds. The PCS indicator blinks. Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U0126 Lost Communication with Steering Angle Sensor Module The driving support ECU assembly is unable to receive certain data from the spiral cable with sensor sub-assembly (steering angle sensor) for approximately 4 seconds or more.

      Both conditions are met:


      • Approximately 3 seconds or more elapse after turning the engine switch on (IG).

      • The driving support ECU assembly power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 7 seconds. The PCS indicator blinks. Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U0129 Lost Communication with Brake System Control Module The driving support ECU assembly is unable to receive certain data from the brake actuator assembly (skid control ECU) for approximately 3 seconds or more.

      Both conditions are met:


      • Approximately 3 seconds or more elapse after turning the engine switch on (IG).

      • The driving support ECU assembly power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 6 seconds. The PCS indicator blinks. Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U0235 Lost Communication with Cruise Control Front Distance Range Sensor The driving support ECU assembly is unable to receive certain data from the millimeter wave radar sensor assembly for approximately 1 second or more.

      Both conditions are met:


      • Approximately 3 seconds or more elapse after turning the engine switch on (IG).

      • The driving support ECU assembly power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 4 seconds. The PCS indicator blinks. Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U023A Lost Communication with Image Processing Module "A" The driving support ECU assembly is unable to receive certain data from the forward recognition camera for approximately 3 seconds or more.

      Both conditions are met:


      • Approximately 3 seconds or more elapse after turning the engine switch on (IG).

      • The driving support ECU assembly power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 6 seconds. The PCS indicator blinks. Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U1002*1 Lost Communication with Gateway Module The driving support ECU assembly detects a problem when communicating with the millimeter wave radar sensor assembly and forward recognition camera.

      Both conditions are met:


      • Approximately 3 seconds or more elapse after turning the engine switch on (IG).

      • The driving support ECU assembly power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 3 seconds. The PCS indicator blinks. Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U1104 Lost Communication with Driving Support ECU The driving support ECU assembly data sent to each ECU (sensor) is lost for approximately 3 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch on (IG).

      • The driving support ECU assembly power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 5 seconds. The PCS indicator blinks. Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.

    14. Clearance warning ECU assembly (w/ LEXUS Parking Assist-sensor System) / GTS Display "Clearance Sonar"


      Body Electrical > Clearance Sonar > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0101 Lost Communication with TCM The clearance warning ECU assembly is unable to receive certain data from the ECM for approximately 5 seconds or more.

      Both conditions are met:


      • Approximately 5 seconds or more elapse after turning the engine switch on (IG).

      • The clearance warning ECU assembly power supply voltage is 10.2 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 10 seconds. - - The DTC remains stored until it is cleared using the GTS.
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module The clearance warning ECU assembly is unable to receive certain data from the combination meter assembly for approximately 5 seconds or more.

      Both conditions are met:


      • Approximately 5 seconds or more elapse after turning the engine switch on (IG).

      • The clearance warning ECU assembly power supply voltage is 10.2 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 10 seconds. - - The DTC remains stored until it is cleared using the GTS.

    15. Multiplex tilt and telescopic ECU / GTS Display "Tilt&Telescopic"


      Body Electrical > Tilt&Telescopic > Trouble Codes

      Tech Tips


      • DTC communication uses the CAN communication system.

      • *1: Refer to Power Steering System

        Click here

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0142 Lost Communication with Body ECU

      Either condition is met:


      • The multiplex tilt and telescopic ECU is unable to receive certain data from the main body ECU (multiplex network body ECU) for approximately 4 seconds or more.

      • The multiplex tilt and telescopic ECU is unable to receive certain data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 4 seconds or more elapse after a power source mode change is detected (+B changes from off to on, ACC changes between on and off, or IG changes between on and off).

      • The multiplex tilt and telescopic ECU power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 14 seconds. - - The DTC is stored only while the malfunction is present.
      U0208 Lost Communication with D-Seat ECU The multiplex tilt and telescopic ECU is unable to receive certain data from the position control ECU and switch assembly RH for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 10 seconds or more elapse after a power source mode change is detected (+B changes from off to on, ACC changes between on and off, or IG changes between on and off).

      • The multiplex tilt and telescopic ECU power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 20 seconds. - - The DTC is stored only while the malfunction is present.
      B2624*1 Vehicles Speed

      Either condition is met:


      • The multiplex tilt and telescopic ECU is unable to receive certain data from the combination meter assembly for 10 seconds or more.

      • While the vehicle speed signal is being received, the conditions for auto-away/return control occur twice consecutively.

      All conditions are met:


      • A power source mode change is detected (+B changes from off to on, ACC changes between on and off, or IG changes between on and off).

      • The vehicle speed is between 4 and 10 km/h (2.4 and 6 mph).

      • The multiplex tilt and telescopic ECU power supply voltage is 10 V or higher.

      		 Drive the vehicle at a speed between 4 and 10 km/h (2.4 and 6 mph) for approximately 10 seconds. - - The DTC is stored only while the malfunction is present.

    16. Front multiplex network door ECU RH / GTS Display "Mirror R"


      Body Electrical > Mirror R > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0142 Lost Communication With Body Control Module "B" The front multiplex network door ECU RH is unable to receive certain data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 10 seconds or more elapse after a power source mode change is detected (+B changes from off to on, ACC changes between on and off, or IG changes between on and off).

      • The front multiplex network door ECU RH power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 20 seconds. - - The DTC remains stored until it is cleared using the GTS.

    17. Front multiplex network door ECU LH / GTS Display "Mirror L"


      Body Electrical > Mirror L > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0142 Lost Communication With Body Control Module "B" The front multiplex network door ECU RH is unable to receive certain data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 10 seconds or more elapse after a power source mode change is detected (+B changes from off to on, ACC changes between on and off, or IG changes between on and off).

      • The front multiplex network door ECU RH power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 20 seconds. - - The DTC remains stored until it is cleared using the GTS.

    18. Parking brake ECU assembly / GTS Display "Electric Parking Brake"


      Chassis > Electric Parking Brake > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0073 Control Module Communication Bus OFF The parking brake ECU assembly is unable to send or receive data 10 times consecutively. The engine switch is on (IG). Turn the engine switch on (IG) and wait at least approximately 2 seconds. The brake warning light / yellow (minor malfunction) illuminates. - The DTC remains stored until it is cleared using the GTS.
      U0100 Lost Communication With ECM/PCM "A" The parking brake ECU assembly is unable to receive certain data from the ECM for approximately 10 seconds or more.

      All conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch on (IG).

      • The vehicle speed is 15 km/h (9 mph) or more.

      • The parking brake ECU assembly power supply voltage is 10.5 V or higher.

      		 Drive the vehicle for approximately 12 seconds or more at a speed of 15 km/h (9 mph) or more. The brake warning light / yellow (minor malfunction) illuminates. - The DTC remains stored until it is cleared using the GTS.
      U0124 Lost Communication With Lateral Acceleration Sensor Module The parking brake ECU assembly is unable to receive certain data from the yaw rate and acceleration sensor (yaw rate sensor) for approximately 1 second or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch on (IG).

      • The parking brake ECU assembly power supply voltage is 10.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 3 seconds. The brake warning light / yellow (minor malfunction) illuminates. - The DTC remains stored until it is cleared using the GTS.
      U0129 Lost Communication With Brake System Control Module The parking brake ECU assembly is unable to receive certain data from the brake actuator assembly (skid control ECU) for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch on (IG).

      • The parking brake ECU assembly power supply voltage is 10.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 12 seconds. The brake warning light / yellow (minor malfunction) illuminates. - The DTC remains stored until it is cleared using the GTS.

    19. Blind spot monitor sensor RH (w/ Blind Spot Monitor System) / GTS Display "Blind Spot Monitor Master"


      Body Electrical > Blind Spot Monitor Master > Trouble Codes

      Tech Tips


      • DTC communication uses the CAN communication system.

      • *1: Refer to Blind Spot Monitor System.

        Click here

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 Lost Communication with ECM/PCM "A" The blind spot monitor sensor RH is unable to receive certain data from the ECM for approximately 11 seconds or more.

      All conditions are met:


      • Approximately 1 second elapses after turning the engine switch on (IG).

      • The blind spot monitor main switch is on.

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

      • The blind spot monitor sensor RH power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG), turn the blind spot monitor main switch on, and drive the vehicle at a speed of 5 km/h (3 mph) or more for approximately 12 seconds or more. - Displays messages on the multi-information display. The DTC remains stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module The blind spot monitor sensor RH is unable to receive information from the spiral cable with sensor sub-assembly (steering angle sensor) for approximately 11 seconds or more.

      All conditions are met:


      • Approximately 1 second elapses after turning the engine switch on (IG).

      • The blind spot monitor main switch is on.

      • The blind spot monitor sensor RH power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and turn the blind spot monitor main switch on, and then wait approximately 12 seconds or more. - Displays messages on the multi-information display. The DTC remains stored until it is cleared using the GTS.
      U0129 Lost Communication with Brake System Control Module The blind spot monitor sensor RH is unable to receive certain data from the brake actuator assembly (skid control ECU) for approximately 3 seconds or more.

      All conditions are met:


      • Approximately 2 second elapses after turning the engine switch on (IG).

      • The blind spot monitor main switch is on.

      • The blind spot monitor sensor RH power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and turn the blind spot monitor main switch on, and then wait approximately 5 seconds or more. - Displays messages on the multi-information display. The DTC remains stored until it is cleared using the GTS.
      U0142 Lost Communication with Body Control Module "B" The blind spot monitor sensor RH is unable to receive certain data from the main body ECU (multiplex network body ECU) for approximately 11 seconds or more.

      All conditions are met:


      • Approximately 1 second elapses after turning the engine switch on (IG).

      • The blind spot monitor main switch is on.

      • The blind spot monitor sensor RH power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and turn the blind spot monitor main switch on, and then wait approximately 12 seconds or more. - Displays messages on the multi-information display. The DTC remains stored until it is cleared using the GTS.
      U0232*1 Lost Communication with Blind Spot Monitor Slave Module The blind spot monitor sensor RH is unable to receive information from the blind spot monitor sensor LH for approximately 11 seconds or more.

      All conditions are met:


      • Approximately 1 second elapses after turning the engine switch on (IG).

      • The blind spot monitor sensor RH power supply voltage is 10 V or higher.

      		 Turn the engine switch on (IG) and turn the blind spot monitor main switch on, and then wait approximately 12 seconds or more. - Displays messages on the multi-information display. The DTC remains stored until it is cleared using the GTS.

    20. Stereo component equalizer assembly / GTS Display "ASC"


      Body Electrical > ASC > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 Lost Communication With ECM/PCM "A" The stereo component equalizer assembly is unable to receive certain data from the ECM for approximately 6 seconds or more.

      Both conditions are met:


      • Approximately 3 seconds elapse after turning the engine switch on (IG).

      • The stereo component equalizer assembly power supply voltage is 9.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 9 seconds. - - The DTC remains stored until it is cleared using the GTS.
      U0122 Lost Communication With Vehicle Dynamics Control Module The stereo component equalizer assembly is unable to receive certain data from the brake actuator assembly (skid control ECU) for approximately 2 seconds or more.

      Both conditions are met:


      • Approximately 3 seconds elapse after turning the engine switch on (IG).

      • The stereo component equalizer assembly power supply voltage is 9.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 5 seconds. - - The DTC remains stored until it is cleared using the GTS.
      U0142 Lost Communication With Body Control Module "B" The stereo component equalizer assembly is unable to receive certain data from the main body ECU (multiplex network body ECU) for approximately 4 seconds or more.

      Both conditions are met:


      • Approximately 3 seconds elapse after turning the engine switch on (IG).

      • The stereo component equalizer assembly power supply voltage is 9.5 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 7 seconds. - - The DTC remains stored until it is cleared using the GTS.

    21. Torque vectoring differential ECU assembly / GTS Display "TVD"


      Chassis > TVD > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 Lost Communication with ECM / PCM The torque vectoring differential ECU assembly does not receive data from the ECM for approximately 1 second or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 1 second or more.

      • The power source voltage of the torque vectoring differential ECU assembly is 10 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 2 seconds. - Displays messages on the multi-information displays. DTC is stored until it is cleared using the GTS.
      U0122 Lost Communication with Vehicle Dynamics Control Module The torque vectoring differential ECU assembly does not receive data from the brake actuator assembly (skid control ECU) for approximately 1 second or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 1 second or more.

      • The power source voltage of the torque vectoring differential ECU assembly is 10 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 2 seconds. - Displays messages on the multi-information displays. DTC is stored until it is cleared using the GTS.
      U0123 Lost Communication with Yaw Rate Sensor Module The torque vectoring differential ECU assembly does not receive data from the yaw rate and acceleration sensor (yaw rate sensor) for approximately 1 second or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 1 second or more.

      • The power source voltage of the torque vectoring differential ECU assembly is 10 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 2 seconds. - Displays messages on the multi-information displays. DTC is stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module The torque vectoring differential ECU assembly does not receive data from the spiral cable with sensor sub-assembly (steering angle sensor) for approximately 1 second or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 1 second or more.

      • The power source voltage of the torque vectoring differential ECU assembly is 10 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 2 seconds. - Displays messages on the multi-information displays. DTC is stored until it is cleared using the GTS.
      U0131 Lost Communication with Power Steering Control Module The stereo component equalizer assembly does not receive data from the power steering ECU assembly for approximately 1 second or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 1 second or more.

      • The power source voltage of the torque vectoring differential ECU assembly is 10 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 2 seconds. - Displays messages on the multi-information displays. DTC is stored until it is cleared using the GTS.
      U1172 Lost Communication with Vehicle Dynamics Control Module (ch2) The torque vectoring differential ECU assembly does not receive data from the brake actuator assembly (skid control ECU) for approximately 1 second or more.

      Both conditions are met:


      • The engine switch is on (IG) for approximately 1 second or more.

      • The power source voltage of the torque vectoring differential ECU assembly is 10 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 2 seconds. - Displays messages on the multi-information displays. DTC is stored until it is cleared using the GTS.

    22. Forward recognition camera (w/ Pre-crash Safety System) / GTS Display "Front Recognition Camera"


      Chassis > Front Recognition Camera > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 Lost Communication with ECM/PCM "A" The forward recognition camera is unable to receive certain data from the ECM for approximately 5 seconds or more.

      All conditions are met:


      • Approximately 2 seconds elapses after turning the engine switch is on (IG).

      • The vehicle speed is 1 km/h (1 mph) or more.

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Drive the vehicle for approximately 7 seconds at a speed of 1 km/h (1 mph) or more. - - The DTC is stored only while the malfunction is present.
      U0101 Lost Communication with TCM The forward recognition camera is unable to receive certain data from the ECM for approximately 5 seconds or more.

      All conditions are met:


      • Approximately 2 seconds elapses after turning the engine switch is on (IG).

      • The vehicle speed is 1 km/h (1 mph) or more.

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Drive the vehicle for approximately 7 seconds at a speed of 1 km/h (1 mph) or more. - - The DTC is stored only while the malfunction is present.
      U0123 Lost Communication with Yaw Rate Sensor Module The forward recognition camera is unable to receive certain data from the yaw rate and acceleration sensor (yaw rate sensor) for approximately 5 seconds or more.

      All conditions are met:


      • Approximately 2 seconds elapses after turning the engine switch is on (IG).

      • The vehicle speed is 1 km/h (1 mph) or more.

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Drive the vehicle for approximately 7 seconds at a speed of 1 km/h (1 mph) or more. - - The DTC is stored only while the malfunction is present.
      U0126 Lost Communication with Steering Angle Sensor Module The forward recognition camera is unable to receive certain data from the spiral cable with sensor sub-assembly (steering angle sensor) for approximately 5 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch is on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 7 seconds. - - The DTC is stored only while the malfunction is present.
      U0129 Lost Communication with Brake System Control Module The forward recognition camera is unable to receive certain data from the brake actuator assembly (skid control ECU) for approximately 5 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch is on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 7 seconds. - - The DTC is stored only while the malfunction is present.
      U0142 Lost Communication with Body Control Module "B" The forward recognition camera is unable to receive certain data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch is on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 7 seconds. - - The DTC is stored only while the malfunction is present.
      U0182 Lost Communication with Lighting Control Module Front The forward recognition camera is unable to receive certain data from the headlight light control ECU sub-assembly LH for 5 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch is on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 7 seconds. - - The DTC is stored only while the malfunction is present.
      U0155 Lost Communication with Instrument Panel Cluster (IPC) Control Module The forward recognition camera is unable to receive certain data from the combination meter assembly for approximately 50 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch is on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 60 seconds. - - The DTC is stored only while the malfunction is present.
      U0235 Lost Communication with Cruise Control Front Distance Range Sensor The forward recognition camera is unable to receive certain data from the millimeter wave radar sensor assembly for approximately 5 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch is on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 7 seconds. - - The DTC is stored only while the malfunction is present.
      U1104 Lost Communication with Driving Support ECU The forward recognition camera data sent to each ECU (sensor) is lost for approximately 5 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch is on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 7 seconds. - - The DTC is stored only while the malfunction is present.

    23. Forward recognition camera (w/ Pre-crash Safety System) / GTS Display "LKA/LDA"


      Chassis > LKA/LDA > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 Lost Communication with ECM/PCM "A" The forward recognition camera is unable to receive certain data from the ECM for approximately 5 seconds or more.

      All conditions are met:


      • Approximately 2 seconds elapses after turning the engine switch is on (IG).

      • The vehicle speed is 1 km/h (1 mph) or more.

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Drive the vehicle for approximately 7 seconds at a speed of 1 km/h (1 mph) or more. - Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U0101 Lost Communication with TCM The forward recognition camera is unable to receive certain data from the ECM for approximately 5 seconds or more.

      All conditions are met:


      • Approximately 2 seconds elapses after turning the engine switch is on (IG).

      • The vehicle speed is 1 km/h (1 mph) or more.

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Drive the vehicle for approximately 7 seconds at a speed of 1 km/h (1 mph) or more. - Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U0123 Lost Communication with Yaw Rate Sensor Module The forward recognition camera is unable to receive certain data from the yaw rate and acceleration sensor (yaw rate sensor) for approximately 5 seconds or more.

      All conditions are met:


      • Approximately 2 seconds elapses after turning the engine switch is on (IG).

      • The vehicle speed is 1 km/h (1 mph) or more.

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Drive the vehicle for approximately 7 seconds at a speed of 1 km/h (1 mph) or more. - Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U0126 Lost Communication with Steering Angle Sensor Module The forward recognition camera is unable to receive certain data from the spiral cable with sensor sub-assembly (steering angle sensor) for approximately 5 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch is on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 7 seconds. - Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U0129 Lost Communication with Brake System Control Module The forward recognition camera is unable to receive certain data from the brake actuator assembly (skid control ECU) for approximately 5 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch is on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 7 seconds. - Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U0131 Lost Communication with Electric Power Steering ECU The forward recognition camera is unable to receive certain data from the power steering ECU assembly for approximately 5 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapses after turning the engine switch on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 7 seconds. - Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U0142 Lost Communication with Body Control Module "B" The forward recognition camera is unable to receive certain data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch is on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 7 seconds. - Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U0155 Lost Communication With Instrument Panel Cluster (IPC) Control Module The forward recognition camera is unable to receive certain data from the combination meter assembly for approximately 50 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch is on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 60 seconds. - Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U0235 Lost Communication with Cruise Control Front Distance Range Sensor The forward recognition camera is unable to receive certain data from the millimeter wave radar sensor assembly for approximately 5 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch is on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 7 seconds. - Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U023A Lost Communication with Front Camera Module The forward recognition camera is unable to receive certain data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapses after turning the engine switch on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 7 seconds. - Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.
      U1104 Lost Communication with Driving Support ECU The forward recognition camera data sent to each ECU (sensor) is lost for approximately 5 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch is on (IG).

      • The forward recognition camera power supply voltage is 8 to 16 V.

      		 Turn the engine switch is on (IG) and wait at least approximately 7 seconds. - Displays messages on the multi-information display. The DTC is stored only while the malfunction is present.

    24. Combination meter mirror ECU (w/ Headup Display) / GTS Display "Head Up Display"


      Body Electrical > Head Up Display > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC No. Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 Lost Communication with ECM/PCM The combination meter mirror ECU is unable to receive certain data from the ECM for approximately 3 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch on (IG).

      • The meter mirror sub-assembly power supply voltage is 10.5 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 6 seconds. - - DTC is stored until it is cleared using the GTS.
      U0142 Lost Communication with Body Control Module The combination meter mirror ECU is unable to receive certain data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch on (IG).

      • The meter mirror sub-assembly power supply voltage is 10.5 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 13 seconds. - - DTC is stored until it is cleared using the GTS.
      U0163 Lost Communication with Navigation Control Module The combination meter mirror ECU is unable to receive certain data from the radio receiver assembly for approximately 3 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch on (IG).

      • The meter mirror sub-assembly power supply voltage is 10.5 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 6 seconds. - - DTC is stored until it is cleared using the GTS.
      U023A Lost Communication with Image Processing Module "A" The combination meter mirror ECU is unable to receive certain data from the forward recognition camera for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch on (IG).

      • The meter mirror sub-assembly power supply voltage is 10.5 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 13 seconds. - - DTC is stored until it is cleared using the GTS.
      U1104 Lost Communication with Driving Support ECU The combination meter mirror ECU is unable to receive certain data from the driving support ECU assembly for approximately 10 seconds or more.

      Both conditions are met:


      • Approximately 2 seconds or more elapse after turning the engine switch on (IG).

      • The meter mirror sub-assembly power supply voltage is 10.5 V or more.

      		 Turn the engine switch on (IG) and wait at least approximately 10 seconds. - - DTC is stored until it is cleared using the GTS.

    25. Absorber control ECU / GTS Display "Air suspension"


      Chassis > Air suspension > Trouble Codes

      Tech Tips

      DTC communication uses the CAN communication system.

      DTC Detection Item DTC Detection Condition DTC Detection Precondition DTC Check Procedure Warning Indication in Meter Multi-information Display DTC Storage Method
      U0100 Lost Communication with ECM/PCM "A" The absorber control ECU is unable to receive certain data from the ECM for approximately 3 seconds or more.

      All conditions are met:


      • Approximately 1 second or more elapses after turning the engine switch on (IG).

      • The vehicle speed is 30 km/h (18 mph) or more.

      • The absorber control ECU power supply is 10 V or higher.

      		 Drive the vehicle for approximately 3 seconds or more at a speed of 30 km/h (18 mph) or more. - - DTC is stored until it is cleared using the GTS.
      U0101 Lost Communication with TCM The absorber control ECU is unable to receive certain data from the ECM for approximately 6 seconds or more.

      All conditions are met:


      • Approximately 1 second or more elapses after turning the engine switch on (IG).

      • The vehicle speed is 30 km/h (18 mph) or more.

      • The absorber control ECU power supply is 10 V or higher.

      		 Drive the vehicle for approximately 6 seconds or more at a speed of 30 km/h (18 mph) or more. - - DTC is stored until it is cleared using the GTS.
      U0122 Lost Communication with Vehicle Dynamics Control Module The absorber control ECU is unable to receive certain data from the brake actuator assembly (skid control ECU) for approximately 3 seconds or more.

      Both conditions are met:


      • Approximately 2 second or more elapses after turning the engine switch on (IG).

      • The absorber control ECU power supply is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 5 seconds. - - DTC is stored until it is cleared using the GTS.
      U0124 Lost Communication with Lateral Acceleration Sensor Module The absorber control ECU is unable to receive certain data from the yaw rate sensor for approximately 3 seconds or more.

      Both conditions are met:


      • Approximately 1 second or more elapses after turning the engine switch on (IG).

      • The absorber control ECU power supply is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 4 seconds. - - DTC is stored until it is cleared using the GTS.
      U0126 Lost Communication with Steering Angle Sensor Module The absorber control ECU is unable to receive certain data from the steering angle sensor for approximately 3 seconds or more.

      Both conditions are met:


      • Approximately 1 second or more elapses after turning the engine switch on (IG).

      • The absorber control ECU power supply is 10 V or higher.

      		 Turn the engine switch on (IG) and wait at least approximately 4 seconds. - - DTC is stored until it is cleared using the GTS.

    26. Spiral cable with sensor sub-assembly (steering angle sensor)

      Tech Tips

      The spiral cable with sensor sub-assembly (steering angle sensor) is connected to the CAN communication system but CAN communication DTCs are not stored.

    27. Airbag ECU assembly

      Tech Tips

      The airbag ECU assembly is connected to the CAN communication system but CAN communication DTCs are not stored.

    28. Position control ECU and switch assembly LH

      Tech Tips

      The position control ECU and switch assembly LH is connected to the CAN communication system but CAN communication DTCs are not stored.

    29. Position control ECU and switch assembly RH

      Tech Tips

      The position control ECU and switch assembly RH is connected to the CAN communication system but CAN communication DTCs are not stored.

    30. Luggage closer motor assembly (w/ Power Trunk Lid System)

      Tech Tips

      The luggage closer motor assembly is connected to the CAN communication system but CAN communication DTCs are not stored.

    31. Multiplex network door ECU (w/o Power Trunk Lid System)

      Tech Tips

      The multiplex network door ECU is connected to the CAN communication system but CAN communication DTCs are not stored.

    32. Roll rate and vertical acceleration sensor (yaw rate sensor)

      Tech Tips

      The roll rate and vertical acceleration sensor (yaw rate sensor) is connected to the CAN communication system but CAN communication DTCs are not stored.

    33. Millimeter wave radar sensor assembly (w/ Pre-crash Safety System)

      Tech Tips

      The millimeter wave radar sensor assembly is connected to the CAN communication system but CAN communication DTCs are not stored.

    34. Yaw rate and acceleration sensor (yaw rate sensor)

      Tech Tips

      The yaw rate and acceleration sensor (yaw rate sensor) is connected to the CAN communication system but CAN communication DTCs are not stored.

    35. Central gateway ECU (network gateway ECU)

      Tech Tips

      The central gateway ECU (network gateway ECU) is connected to the CAN communication system but CAN communication DTCs are not stored.

  6. CAN BUS WAVEFORMS

    B002EROE07

    Tech Tips


    • This waveform is measured between terminals CANH and GND, and terminals CANL and GND of the central 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 wire, an open in a CAN branch wire, or a short between a CAN wire (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. B002DRNN11
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Normal waveform

      2. B002CHZN08
        *a 1 V/DIV.
        *b 50 μs/DIV.

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

        Tech Tips


        • 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. B002CEKN08
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Short between the CAN bus lines (CANH and CANL)

        Tech Tips


        • 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 a reference. The actual measured waveform may differ significantly depending on the location of the open or short circuit.


      1. B002D13N11
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Open in a CAN branch wire (CANH)

        Tech Tips


        • An abnormal waveform is output from an ECU with an open in one of its CAN branch wires. 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 wire is disconnected.

      2. B002D0CN10
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Open in a CAN branch wire (CANL)

        Tech Tips


        • An abnormal waveform is output from an ECU with an open in one of its CAN branch wires. 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 wire is disconnected.

      3. B002DETN10
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Open in a CAN main wire (CANH)

        Tech Tips


        • Waveforms of ECUs or sensors that are closer to the central 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 from the open part are abnormal.

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

      4. B002CDAN10
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Short between a CAN bus line (CANH) and ground

        Tech Tips


        • Narrow down the shorted part by checking for waveform changes when disconnecting connector(s) from the CAN junction connector(s) 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. B002EIIN09
        *a 1 V/DIV.
        *b 50 μs/DIV.

        Short between a CAN bus line (CANL) and ground

        Tech Tips


        • Narrow down the shorted part by checking for waveform changes when disconnecting connector(s) from the CAN junction connector(s) 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.

  7. DATA SENDING/RECEIVING TABLE


    1. Data sending/receiving table

      Tech Tips

      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 from

      (Can be Checked in Data List)

      Data Received

      (Cannot be Checked in Data List)

      		 Selected System Relevant Data List Item Link
      Accelerator position ECM

      • Brake actuator assembly (skid control ECU)

      • Stereo component equalizer assembly

      • Airbag ECU assembly

      • Radio receiver assembly

      • Parking brake ECU assembly

      • Driving support ECU assembly

      • Forward recognition camera

      • Torque vectoring differential ECU assembly

      		 Engine (w/ Canister Pump Module) Accelerator Position

      Click here

      Engine (w/o Canister Pump Module) Accelerator Position

      Click here

      ABS/VSC/TRC Accelerator Opening Angle %

      Click here

      ASC Accelerator Position

      Click here

      Engine speed ECM

      • Combination meter assembly

      • Brake actuator assembly (skid control ECU)

      • Power steering ECU assembly

      • Stereo component equalizer assembly

      • Torque vectoring differential ECU assembly

      • Combination meter mirror ECU

      • Absorber control ECU

      • Airbag ECU assembly

      • Air conditioning amplifier assembly

      • Radio receiver assembly

      • Main body ECU (multiplex network body ECU)

      • Certification ECU (smart key ECU assembly)

      		 Engine (w/ Canister Pump Module) Engine Speed

      Click here

      Engine (w/o Canister Pump Module) Engine Speed

      Click here

      Combination Meter Engine Rpm

      Click here

      ABS/VSC/TRC Engine Revolutions

      Click here

      EMPS Engine Revolution

      Click here

      ASC Engine Revolution

      Click here

      TVD Engine Speed

      Click here

      Head Up Display Engine Rpm

      Click here

      Air suspension Engine Speed

      Click here

      Intake air ECM - Brake actuator assembly (skid control ECU) Engine (w/ Canister Pump Module) Intake Air

      Click here

      Engine (w/o Canister Pump Module) Intake Air

      Click here

      Engine coolant temperature ECM

      • Air conditioning amplifier assembly

      • Combination meter assembly

      • Torque vectoring differential ECU assembly

      		 Power steering ECU assembly Engine (w/ Canister Pump Module) Coolant Temp

      Click here

      Engine (w/o Canister Pump Module) Coolant Temp

      Click here

      Air Conditioner Engine Coolant Temp

      Click here

      Combination Meter Coolant Temperature

      Click here

      TVD Coolant Temperature

      Click here

      Shift position P ECM

      • Parking brake ECU assembly

      • Clearance warning ECU assembly

      • Position control ECU and switch assembly LH

      • Position control ECU and switch assembly RH

      • Torque vectoring differential ECU assembly

      • Luggage closer motor assembly

      • Multiplex network door ECU

      • Airbag ECU assembly

      • Main body ECU (multiplex network body ECU)

      • Radio receiver assembly

      • Combination meter assembly*1

      • Headlight light control ECU sub-assembly LH

      • Combination meter mirror ECU

      • Driving support ECU assembly

      • Forward recognition camera

      		 Engine (w/ Canister Pump Module) Shift SW Status (P Range)

      Click here

      Engine (w/o Canister Pump Module) Shift SW Status (P Range)

      Click here

      Electric Parking Brake P Position

      Click here

      Clearance Sonar Parking Signal

      Click here

      Driver Seat Shift SW Position

      Click here

      Passenger Seat Shift SW Position

      Click here

      TVD P Position

      Click here

      Shift position R ECM

      • Parking brake ECU assembly

      • Clearance warning ECU assembly

      • Blind spot monitor sensor RH

      • Torque vectoring differential ECU assembly

      • Airbag ECU assembly

      • Radio receiver assembly

      • Main body ECU (multiplex network body ECU)

      • Combination meter assembly*1

      • Headlight light control ECU sub-assembly LH

      • Combination meter mirror ECU

      • Driving support ECU assembly

      • Forward recognition camera

      		 Engine (w/ Canister Pump Module) Shift SW Status (R Range)

      Click here

      Engine (w/o Canister Pump Module) Shift SW Status (R Range)

      Click here

      Electric Parking Brake R Position

      Click here

      Clearance Sonar Reverse Signal

      Click here

      Blind Spot Monitor Master Reverse

      Click here

      TVD R Position

      Click here

      Shift position N ECM

      • Parking brake ECU assembly

      • Torque vectoring differential ECU assembly

      • Airbag ECU assembly

      • Radio receiver assembly

      • Main body ECU (multiplex network body ECU)

      • Combination meter assembly*1

      • Clearance warning ECU assembly

      • Headlight light control ECU sub-assembly LH

      • Combination meter mirror ECU

      • Driving support ECU assembly

      • Forward recognition camera

      		 Engine (w/ Canister Pump Module) Shift SW Status (N Range)

      Click here

      Engine (w/o Canister Pump Module) Shift SW Status (N Range)

      Click here

      Electric Parking Brake N Position

      Click here

      TVD N Position

      Click here

      Shift position D ECM

      • Parking brake ECU assembly

      • Torque vectoring differential ECU assembly

      • Airbag ECU assembly

      • Radio receiver assembly

      • Main body ECU (multiplex network body ECU)

      • Combination meter assembly*1

      • Clearance warning ECU assembly

      • Headlight light control ECU sub-assembly LH

      • Combination meter mirror ECU

      • Driving support ECU assembly

      • Forward recognition camera

      		 Engine (w/ Canister Pump Module) Shift SW Status (D Range)

      Click here

      Engine (w/o Canister Pump Module) Shift SW Status (D Range)

      Click here

      Electric Parking Brake D Position

      Click here

      TVD D Position

      Click here

      Stop light switch signal Brake actuator assembly (skid control ECU)

      • ECM

      • Parking brake ECU assembly

      • Torque vectoring differential ECU assembly

      • Absorber control ECU

      • Luggage closer motor assembly

      • Multiplex network door ECU

      • Airbag ECU assembly

      • Radio receiver assembly

      • Driving support ECU assembly

      • Forward recognition camera

      		 ABS/VSC/TRC Stop Light SW

      Click here

      Engine (w/ Canister Pump Module) Stop Light Switch

      Click here

      Engine (w/o Canister Pump Module) Stop Light Switch

      Click here

      Electric Parking Brake Stop Light Switch

      Click here

      TVD Stop Light SW

      Click here

      Air suspension Stop Light Switch

      Click here

      FL wheel speed Brake actuator assembly (skid control ECU)

      • Parking brake ECU assembly

      • Torque vectoring differential ECU assembly

      • Headlight light control ECU sub-assembly LH

      • ECM

      • Power steering ECU assembly

      • Driving support ECU assembly

      • Forward recognition camera

      		 ABS/VSC/TRC FL Wheel Speed

      Click here

      Electric Parking Brake FL Wheel Speed

      Click here

      TVD FL Wheel Speed

      Click here

      AFS FL Wheel Speed

      Click here

      FR wheel speed Brake actuator assembly (skid control ECU)

      • Parking brake ECU assembly

      • Torque vectoring differential ECU assembly

      • Headlight light control ECU sub-assembly LH

      • ECM

      • Power steering ECU assembly

      • Driving support ECU assembly

      • Forward recognition camera

      		 ABS/VSC/TRC FR Wheel Speed

      Click here

      Electric Parking Brake FR Wheel Speed

      Click here

      TVD FR Wheel Speed

      Click here

      AFS FR Wheel Speed

      Click here

      RL wheel speed Brake actuator assembly (skid control ECU)

      • Parking brake ECU assembly

      • Torque vectoring differential ECU assembly

      • ECM

      • Power steering ECU assembly

      • Driving support ECU assembly

      • Forward recognition camera

      • Headlight light control ECU sub-assembly LH

      		 ABS/VSC/TRC RL Wheel Speed

      Click here

      Electric Parking Brake RL Wheel Speed

      Click here

      TVD RL Wheel Speed

      Click here

      RR wheel speed Brake actuator assembly (skid control ECU)

      • Parking brake ECU assembly

      • Torque vectoring differential ECU assembly

      • ECM

      • Power steering ECU assembly

      • Driving support ECU assembly

      • Forward recognition camera

      • Headlight light control ECU sub-assembly LH

      		 ABS/VSC/TRC RR Wheel Speed

      Click here

      Electric Parking Brake RR Wheel Speed

      Click here

      TVD RR Wheel Speed

      Click here

      SLIP indicator light signal Brake actuator assembly (skid control ECU) - Combination meter assembly ABS/VSC/TRC Slip Indicator Light

      Click here

      Vehicle speed Brake actuator assembly (skid control ECU)

      • ECM

      • Parking brake ECU assembly

      • Power steering ECU assembly

      • Combination meter assembly

      • Driving support ECU assembly

      • Blind spot monitor sensor RH

      • Torque vectoring differential ECU assembly

      • Stereo component equalizer assembly

      • Combination meter mirror ECU

      • Radio receiver assembly

      • Spiral cable with sensor sub-assembly (steering angle sensor)

      • Forward recognition camera

      		 ABS/VSC/TRC Vehicle Speed

      Click here

      Engine (w/ Canister Pump Module) Vehicle Speed

      Click here

      Engine (w/o Canister Pump Module) Vehicle Speed

      Click here

      Electric Parking Brake Vehicle Speed

      Click here

      EMPS Meter Vehicle Velocity

      Click here

      Combination Meter Vehicle Speed Meter

      Click here

      Radar Cruise Vhcl Spd-Brake ECU

      Click here

      Blind Spot Monitor Master Vehicle Speed

      Click here

      ASC Vehicle Speed

      Click here

      TVD Vehicle Speed

      Click here

      Head Up Display Vehicle Speed Meter

      Click here

      Vehicle speed Combination meter assembly*2

      • Position control ECU and switch assembly LH

      • Position control ECU and switch assembly RH

      • Multiplex tilt and telescopic ECU

      • Luggage closer motor assembly

      • Multiplex network door 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

      Click here

      Driver Seat Vehicle Speed

      Click here

      Passenger Seat Vehicle Speed

      Click here

      Tilt & Telescopic Freeze Speed Info

      Click here

      Hazard switch signal Combination meter assembly -

      • Radio receiver assembly

      • Brake actuator assembly (skid control ECU)

      		 Combination Meter Hazard Flasher Switch

      Click here

      Turn signal Combination meter assembly Blind spot monitor sensor RH - Combination Meter

      • Turn Signal Switch (Left)

      • Turn Signal Switch (Right)

      Click here

      Blind Spot Monitor Master Turn Switch State

      Click here

      Driver side buckle switch signal Airbag ECU assembly - Main body ECU (multiplex network body ECU) SRS Airbag Left Side Buckle SW

      Click here

      Main body ECU (multiplex network body ECU)*3 Position control ECU and switch assembly RH

      • Combination meter assembly

      • Forward recognition camera

      		 Driver Seat Driver Seat Buckle

      Click here

      Ambient temperature Air conditioning amplifier assembly

      • ECM

      • Combination meter assembly

      • Torque vectoring differential ECU assembly

      • Radio receiver assembly

      • Main body ECU (multiplex network body ECU)

      • Parking brake ECU assembly

      • Power steering ECU assembly

      • Brake actuator assembly (skid control ECU)

      • Driving support ECU assembly

      • Forward recognition camera

      • Combination meter mirror ECU

      		 Air Conditioner Ambient Temp Sensor

      Click here

      Engine (w/ Canister Pump Module) Ambient Temp for A/C

      Click here

      Engine (w/o Canister Pump Module) Ambient Temp for A/C

      Click here

      Combination Meter Ambient Temperature

      Click here

      TVD Outside Temperature

      Click here

      Yaw rate sensor Yaw rate and acceleration sensor (yaw rate sensor)

      • Brake actuator assembly (skid control ECU)

      • Parking brake ECU assembly

      • Driving support ECU assembly

      • Torque vectoring differential ECU assembly

      • Spiral cable with sensor sub-assembly (steering angle sensor)

      • Forward recognition camera

      • Headlight light control ECU sub-assembly LH

      		 ABS/VSC/TRC

      • Yaw Rate Sensor

      • Yaw Rate Sensor2

      Click here

      Electric Parking Brake

      • Deceleration Sensor 1

      • Deceleration Sensor 2

      • Forward and Rearward G

      Click here

      Radar Cruise Yaw Rate Sensor

      Click here

      TVD

      • Yaw Rate Value

      • Back and Forth G

      • Right and Left G

      Click here

      Steering angle sensor Spiral cable with sensor sub-assembly (steering angle sensor)

      • Power steering ECU assembly

      • Brake actuator assembly (skid control ECU)

      • Driving support ECU assembly

      • Blind spot monitor sensor RH

      • Torque vectoring differential ECU assembly

      • Absorber control ECU

      • Radio receiver assembly

      • Forward recognition camera

      		 EMPS Steering Angle

      Click here

      ABS/VSC/TRC Steering Angle Sensor

      Click here

      Radar Cruise Steering Angle

      Click here

      Blind Spot Monitor Master Steering Angle

      Click here

      TVD Steering Angle

      Click here

      Air suspension Steering Angle

      Click here

      Driver seat memory switch signal Front multiplex network door ECU RH Position control ECU and switch assembly RH Main body ECU (multiplex network body ECU) Front Right Door

      • Seat Memory Switch1

      • Seat Memory Switch2

      • Seat Memory Switch3

      • Seat Memory Set SW

      • Seat Memory SW Cancel

      Click here

      Driver Seat

      • SET Switch

      • M1 Switch

      • M2 Switch

      • M3 Switch

      Click here

      Passenger seat memory switch signal Front multiplex network door ECU LH Position control ECU and switch assembly LH Main body ECU (multiplex network body ECU) Front Left Door

      • Seat Memory Switch1

      • Seat Memory Switch2

      • Seat Memory Switch3

      • Seat Memory Set SW

      • Seat Memory SW Cancel

      Click here

      Passenger Seat

      • SET Switch

      • M1 Switch

      • M2 Switch

      • M3 Switch

      Click here

      FL door courtesy switch signal Main body ECU (multiplex network body ECU) -

      • Radio receiver assembly

      • Certification ECU (smart key ECU assembly)

      • Combination meter assembly

      • Front multiplex network door ECU LH

      • Position control ECU and switch assembly LH

      		 Main Body FL Door Courtesy SW

      Click here

      FR door courtesy switch signal Main body ECU (multiplex network body ECU) -

      • Radio receiver assembly

      • Certification ECU (smart key ECU assembly)

      • Combination meter assembly

      • Front multiplex network door ECU RH

      • Forward recognition camera

      		 Main Body FR Door Courtesy SW

      Click here

      RL door courtesy switch signal Main body ECU (multiplex network body ECU) -

      • Radio receiver assembly

      • Certification ECU (smart key ECU assembly)

      • Combination meter assembly

      		 Main Body RL Door Courtesy SW

      Click here

      RR door courtesy switch signal Main body ECU (multiplex network body ECU) -

      • Radio receiver assembly

      • Certification ECU (smart key ECU assembly)

      • Combination meter assembly

      		 Main Body RR Door Courtesy SW

      Click here

      FL door lock position switch signal Main body ECU (multiplex network body ECU) -

      • Radio receiver assembly

      • Certification ECU (smart key ECU assembly)

      		 Main Body FL Door Lock Pos

      Click here

      FR door lock position switch signal Main body ECU (multiplex network body ECU) -

      • Radio receiver assembly

      • Certification ECU (smart key ECU assembly)

      		 Main Body FR Door Lock Pos

      Click here

      RL door lock position switch signal Main body ECU (multiplex network body ECU) -

      • Radio receiver assembly

      • Certification ECU (smart key ECU assembly)

      		 Main Body RL Door Lock Pos

      Click here

      RR door lock position switch signal Main body ECU (multiplex network body ECU) -

      • Radio receiver assembly

      • Certification ECU (smart key ECU assembly)

      		 Main Body RR Door Lock Pos

      Click here

      Clearance sonar main switch signal Clearance warning ECU assembly - Combination meter assembly Clearance Sonar Main Switch

      Click here

      Front sensor LH signal Clearance warning ECU assembly -

      • Radio receiver assembly

      • Combination meter assembly

      		 Clearance Sonar Fr Left Sensor

      Click here

      Front sensor RH signal Clearance warning ECU assembly -

      • Radio receiver assembly

      • Combination meter assembly

      		 Clearance Sonar Fr Right Sensor

      Click here

      Rear center sensor signal Clearance warning ECU assembly -

      • Radio receiver assembly

      • Combination meter assembly

      		 Clearance Sonar

      • Rr Left Center Sensor

      • Rr Right Center Sensor

      Click here

      Rear sensor LH signal Clearance warning ECU assembly -

      • Radio receiver assembly

      • Combination meter assembly

      		 Clearance Sonar Rr Left Sensor

      Click here

      Rear sensor RH signal Clearance warning ECU assembly -

      • Radio receiver assembly

      • Combination meter assembly

      		 Clearance Sonar Rr Right Sensor

      Click here


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

      • *3: The main body ECU (multiplex network body ECU) receives a driver seat buckle switch signal from the center airbag sensor assembly and sends the signal to other ECUs.