CAN COMMUNICATION SYSTEM DIAGNOSIS SYSTEM


  1. ECUS OR SENSORS WHICH COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM


    1. V Bus


      1. ECM

      2. Brake actuator assembly

      3. Main body ECU (Multiplex network body ECU)

      4. Air conditioning amplifier assembly

      5. Power steering ECU with motor assembly

      6. Smart key ECU assembly (Certification ECU)*1

      7. Airbag sensor assembly

      8. Steering sensor

      9. Clearance warning ECU assembly*2

      10. AFS ECU*3

      11. Combination meter assembly

      12. Navigation ECU sub-assembly*4

      13. Radio and display receiver assembly*5

    2. Sub Bus 1*6


      1. Main body ECU (Multiplex network body ECU)

      2. Multiplex tilt and telescopic ECU

        Tech Tips

        *1: w/ Smart entry and start system

        *2: w/ Toyota parking assist sensor system

        *3: w/ AFS ECU

        *4: for Navigation receiver type

        *5: for Radio and display type

        *6: w/ Power tilt and power telescopic steering column system

  2. CHECK FOR INSTALLED SYSTEMS (ECUS AND SENSORS) THAT ADOPT CAN COMMUNICATION


    1. The systems (ECUs and sensors) that adopt 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 intelligent tester display may differ from those shown in the DTC Table by ECU section that follows.

      ECU/Sensor Name intelligent Tester Display Applicability
      ECM ECM (Engine) Installed on all vehicles
      AFS ECU Headlight swivel (AFS) Vehicles with AFS
      Combination meter assembly Combination Meter Installed on all vehicles
      Main body ECU (Multiplex network body ECU) Main Body Installed on all vehicles
      Power steering ECU with motor assembly Power Steering (EPS) Installed on all vehicles
      Brake actuator assembly Skid Control (ABS/VSC/TRAC) Installed on all vehicles
      Steering sensor Spiral cable (Steering Angle Sensor) Installed on all vehicles
      Airbag sensor assembly Airbag Installed on all vehicles
      Smart key ECU assembly (Certification ECU) Certification (Smart) Vehicles with smart entry and start system
      Air conditioning amplifier assembly Air Conditioning Amplifier Installed on all vehicles
      Navigation ECU sub-assembly Display and Navigation (AVN1) Vehicles with navigation system
      Radio and display receiver assembly Display and Navigation (AVN1) Vehicles with audio and visual system
      Clearance warning ECU assembly Clearance warning (Clearance Sonar2) Vehicles with Toyota parking assist-sensor system
      Multiplex tilt and telescopic ECU Multiplex Tilt and Telescopic Vehicles with power tilt and power telescopic steering column system

  3. BUS CHECK (COMMUNICATION BUS CHECK)

    Tech Tips

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


    1. A01EVYD

      Select "Bus Check" from the "System Select" screen on the intelligent tester.

    2. A01EYNE

      Select "Communication Bus Check" from the "Bus Check" screen.

    3. A01ETNO

      The screen displays the ECUs and sensors that are properly connected to the CAN communication system.

      Tech Tips

      If any properly connected ECUs or sensors are not displayed, there is a communication stop in the system.

    4. A01EVXY

      "There is no system connected to the communication bus" is displayed if there are no ECUs or sensors connected to the CAN bus.

    5. A01EY54E02
      Text in Illustration
      *a Pull down menu
      *b List
      *c Example of displayed item
      *d Bus (V bus or sub bus) selected using pull down menu.

      The default item displayed in the pull down menu is "ALL". When checking the ECUs (sensors) connected to each bus, open the pull down menu and select the bus to be checked from the pull down menu. The pull down menu displays "ALL", "V Bus", and the names of the remaining buses.

      Pull Down Menu Display Content
      ALL All ECUs (sensors) connected to the CAN bus
      V Bus ECUs (sensors) connected to the V Bus
      Bus Name ECUs (sensors) connected to the selected bus

      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 Bus Check (Communication Bus Check) screen
      Bus Type Background Color Connection Status
      V Bus White Communication has been normal since the start of the communication bus check.
      Yellow Communication stop occurred at least once since the start of the communication bus check, but communication is currently occurring (unstable communication).
      Red Communication was established at least once since the start of the communication bus check, but communication is currently not occurring (unstable communication).
      Not displayed Communication stop has continued since the start of the communication bus check.*1

      Sub bus

      (gateway function equipped ECU that does not have history of connected ECUs)*2

      		 White Communication has been normal since the start of the communication bus check.
      Yellow Communication stop occurred at least once since the start of the communication bus check, but communication is currently occurring (unstable communication).
      Red Communication was established at least once since the start of the communication bus check, but communication is currently not occurring (unstable communication).
      Not displayed Communication stop has continued since the start of the communication bus check.*1

      Sub bus

      (gateway function equipped ECU that has history of connected ECUs)*3

      		 White Communication has been normal since the start of the communication bus check.
      Yellow Communication stop occurred at least once since the start of the communication bus check, but communication is currently occurring (unstable communication).
      Red

      Currently not communicating (either of the following):


      • Communication stop has continued since the start of the communication bus check.

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

      Either of the following:


      • If a gateway function equipped ECU cannot communicate, the sub bus and ECUs connected to the sub bus will not be displayed.

      • If no ECUs are connected to the sub bus, ''There is no system found on the Communication Bus'' will be displayed.

      Tech Tips


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

      • *1: ECUs that are present in the vehicle but are not displayed on the Communication Bus Check screen.

      • *2: Gateway function equipped ECU that does not memorize the sub bus ECUs that are connected to it.

      • *3: Gateway function equipped ECU that memorizes the sub bus ECUs that are connected to it.

      • If none of the connected ECUs are displayed, or there is no response from the vehicle to the intelligent tester, check the DLC3 branch and the V bus main bus lines for a malfunction.

    6. 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 communication bus check again.

  4. HOW TO INTERPRET BUS CHECK (COMMUNICATION BUS CHECK) SCREEN


    1. When a communication stop is currently occurring, the probable malfunctioning part can be determined from the communication 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 communication bus check rather than from communication DTCs.

      • Wait for approximately 2 minutes after turning the ignition switch to ON (or simulate the driving conditions that enable the malfunction to be reproduced) and select Bus Check (Communication 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 Communication Bus Check screen, a communication stop of the ECU or sensor is suspected.

      Example: Open in both CAN branch lines of ECU B on the V bus

      A01EWNFE01
      Text in Illustration
      *a V Bus *b Sub bus
      *c Terminating Resistor *d Location of malfunction
      *e Not displayed or background color changes to red or yellow *f Communication Bus Check screen

      Tech Tips

      When there are communication stops, ECUs are present in the vehicle even though they are not displayed on the Communication Bus Check screen.

    3. A01EUDBE01
      Text in Illustration
      *a Background color periodically changes to yellow or red
      *b Not displayed or background color is yellow or red
      *c Not displayed

      If communication errors for multiple ECUs or sensors are indicated on the Communication Bus Check screen, then a communication stop of the ECU or sensor that shows a more serious communication stop (an ECU or a sensor which is not displayed) is suspected.

      Example: Open in a CAN branch line for ECU D on the V bus

      Explanation of Bus Check (Communication Bus Check) screen
      Bus Type Background Color Connection Status
      V Bus White Communication has been normal since the start of the communication bus check.
      Yellow Communication stop occurred at least once since the start of the communication bus check, but communication is currently occurring (unstable communication).
      Red Communication was established at least once since the start of the communication bus check, but communication is currently not occurring (unstable communication).
      Not displayed Communication stop has continued since the start of the communication bus check.*1

      Sub bus

      (gateway function equipped ECU that does not have history of connected ECUs)*2

      		 White Communication has been normal since the start of the communication bus check.
      Yellow Communication stop occurred at least once since the start of the communication bus check, but communication is currently occurring (unstable communication).
      Red Communication was established at least once since the start of the communication bus check, but communication is currently not occurring (unstable communication).
      Not displayed Communication stop has continued since the start of the communication bus check.*1

      Sub bus

      (gateway function equipped ECU that has history of connected ECUs)*3

      		 White Communication has been normal since the start of the communication bus check.
      Yellow Communication stop occurred at least once since the start of the communication bus check, but communication is currently occurring (unstable communication).
      Red

      Currently not communicating (either of the following):


      • Communication stop has continued since the start of the communication bus check.

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

      Either of the following:


      • If a gateway function equipped ECU cannot communicate, the sub bus and ECUs connected to the sub bus will not be displayed.

      • If no ECUs are connected to the sub bus, ''There is no system found on the Communication Bus'' will be displayed.

      Tech Tips


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

      • *1: ECUs that are present in the vehicle but are not displayed on the Communication Bus Check screen.

      • *2: Gateway function equipped ECU that does not memorize the sub bus ECUs that are connected to it.

      • *3: Gateway function equipped ECU that memorizes the sub bus ECUs that are connected to it.

      • The example of the Communication 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 ECU D (output from the other branch line is unstable) and the communication of ECU C is also unstable. In addition, in this example, ECU C is equipped with a gateway function. Therefore, communication is also unstable between the sub bus ECUs of ECU C and the V bus.

      • The example in the illustration shows that ECU D is not displayed on the Communication Bus Check screen. This indicates a more significant communication stop. In this case, a communication stop of ECU D is suspected.

    4. A01ETTNE01
      Text in Illustration
      *a Not displayed or background color changes to red

      If a communication error is indicated on both the V bus and sub bus on the Communication Bus Check screen, suspect any communication stop displayed for the V bus first.

      Example: Open in both CAN branch lines of ECU C on the V bus

      Tech Tips


      • In the communication bus check, it is possible to confirm the communication status of ECUs connected to the V bus after connecting the intelligent tester to the DLC3. As for sub buses, it is possible to confirm which sub bus connected ECUs can communicate with a gateway function equipped ECU on the V 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 Communication Bus Check screen in the illustration shows that ECU C has a gateway function and a communication stop in ECU C is suspected.

    5. A01EXSFE01
      Text in Illustration
      *a Background color changes to red

      If the Communication 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 ECU G on the sub bus

      Tech Tips


      • A communication error in a sub bus does not affect the V bus or 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 V bus main bus lines are open, ECUs or sensors that are located farther away from the DLC3 than the open part will be displayed as a communication stop on the Communication Bus Check screen.

      (In this case, ECU A and B are not displayed or their background color changes to red.)

      A01EYFRE01
      Text in Illustration
      *a V Bus *b Sub Bus
      *c Terminating Resistor *d Location of malfunction
      *e Not displayed or background color is red *f Communication Bus Check screen

      Tech Tips

      If a communication error occurs in an ECU, it is not displayed on the Communication 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 Communication Bus Check screen.

      (In this case, ECU I and J are not displayed or their background color changes to red.)

      A01EXNIE01
      Text in Illustration
      *a V Bus *b Sub Bus
      *c Terminating Resistor *d Location of malfunction
      *e Not displayed or background color is red *f Communication Bus Check screen
      *g Gateway function equipped ECU - -
    8. A01ETGRE01
      Text in Illustration
      *a When any of the following malfunctions occur on the V bus
      *b When any of the following malfunctions occur on a sub bus
      *c Not displayed

      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 Communication 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

      Tech Tips


      • When a malfunction occurs on the V bus, almost all ECUs and sensors on the V 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 V 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 V bus or 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.

  5. BUS CHECK (COMMUNICATION MALFUNCTION DTC)

    Tech Tips

    Only CAN communication system DTCs for each ECU can be displayed on the intelligent tester.


    1. A01EVYD

      Select "Bus Check" from the "System Select" screen on the intelligent tester.

    2. A01EYNE

      Select "Communication Malfunction DTC" from the "Bus Check" screen, and then select "Enter".

    3. A01EYWF

      Select the system to be checked for DTCs and select "Details".

    4. A01EYYH

      CAN communication system DTCs are output.

  6. 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.

        A01EUIQE01
        Text in Illustration
        *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 line 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 intelligent tester 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.

        A01EV51E01
        Text in Illustration
        *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 line 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 sub bus that has a communication error, prioritize the communication stop DTCs stored in the gateway function equipped ECU.

      A01EWPDE01
      Text in Illustration
      *a Items to be checked *b ECM
      *c Gateway function equipped ECU *d Location of malfunction
      *e V Bus *f Sub bus

      Note

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

      Tech Tips


      • As gateway function equipped ECUs (sub bus monitor ECU) monitor signals from all ECUs that are connected to sub buses, 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 V bus 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 lines (CANH and CANL)

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

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

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

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

  7. DTC TABLE BY ECU

    Note

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

    Tech Tips


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

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

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


    1. ECM (for 1AZ-FE)

      Tech Tips

      The ECM is connected to the CAN Communication System, but CAN communication DTCs are not output.

    2. ECM (for 2AR-FE) / Intelligent Tester Display "Engine and ECT"

      Tech Tips


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

      • *1: Refer to U760E Automatic Transaxle System Click here.

      • *2: Refer to SFI System Click here.

      ECM (for 2AR-FE) / Intelligent Tester Display "Engine and ECT"
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter DTC Storage Method
      U0100*1 Lost Communication with ECM / PCM "A" The transmission control ECU does not receive data from the engine control ECU for 1.25 seconds or more.

      Both conditions are met:


      • The ignition switch is ON.

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

      		 Turn the ignition switch to ON and wait 5 seconds or more. MIL illuminates. DTC remains stored only while malfunction is occurring.
      U0101*2 Lost Communication with TCM The engine control ECU does not receive data from the transmission control ECU for 1.25 seconds or more.

      Both conditions are met:


      • The ignition switch is ON.

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

      		 Turn the ignition switch to ON and wait 5 seconds or more. MIL illuminates. DTC remains stored only while malfunction is occurring.

    3. ECM (for 2GR-FE) / Intelligent Tester Display "Engine"

      Tech Tips


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

      • *1: Refer to SFI System Click here.

      ECM (for 2GR-FE) / Intelligent Tester Display "Engine"
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter DTC Storage Method
      U0101*1 Lost Communication with TCM The ECM does not receive data from the TCM for 1.25 seconds or more.

      Both conditions are met:


      • The engine switch is turned on (IG).

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

      		 Turn the engine switch on (IG) and wait 5 seconds or more. MIL illuminates. DTC remains stored only while malfunction is occurring.

    4. TCM (for 2GR-FE) / Intelligent Tester Display "ECT"

      Tech Tips


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

      • *1: Refer to U660E Automatic Transaxle System Click here.

      TCM / Intelligent Tester Display "ECT"
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter DTC Storage Method
      U0100*1 Lost Communication with ECM / PCM "A" The TCM does not receive data from the ECM for 1.25 seconds or more.

      Both conditions are met:


      • The engine switch is turned on (IG).

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

      		 Turn the engine switch on (IG) and wait 5 seconds or more. MIL illuminates. DTC remains stored only while malfunction is occurring.

    5. Power Steering ECU with Motor Assembly / Intelligent Tester Display "EMPS"

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

      Power Steering ECU with Motor Assembly / Intelligent Tester Display "EMPS"
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter DTC Storage Method
      U0100 Lost Communication with ECM / PCM "A" The power steering ECU with motor assembly does not receive data from the ECM for 5 minutes or more.

      All conditions are met:


      • The ignition switch is turned to ON and 2 seconds elapse.

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

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

      		 Drive the vehicle at a speed of 20 km/h (12 mph) or more for at least 5 minutes. EPS warning light illuminates. DTC remains stored only while malfunction is occurring.
      U0129 Lost Communication with Brake System Control Module The power steering ECU with motor assembly cannot receive data from the brake actuator assembly for 2.34 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 3 seconds elapse.

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

      		 Turn the ignition switch to ON and wait at least 6 seconds. EPS warning light illuminates. DTC remains stored only while malfunction is occurring.

    6. Brake Actuator Assembly / Intelligent Tester Display "ABS/VSC/TRC"

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

      Brake Actuator Assembly / Intelligent Tester Display "ABS/VSC/TRC"
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter DTC Storage Method
      U0073 Control Module Communication Bus OFF Bus off is judged for 0.1 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 1 second elapses.

      • The power source voltage of the brake actuator assembly (+BS terminal voltage) is between 9.6 and 16.5 V.

      		 Turn the ignition switch to ON and check that the initial light check illumination turns off, and then wait at least 3 seconds.

      • ABS warning light illuminates.

      • Slip indicator light illuminates.

      • Brake warning light illuminates.

      		 DTC is stored until it is cleared using the intelligent tester.
      U0100 Lost Communication with ECM / PCM The brake actuator assembly does not receive data from the ECM for 2.5 seconds or more.

      All conditions are met:


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

      • The ignition switch is turned to ON and 1 second elapses.

      • The power source voltage of the brake actuator assembly (+BS terminal voltage) is between 9.6 and 16.5 V.

      		 Turn the ignition switch to ON and drive the vehicle at a speed of 6 km/h (4 mph) or more for 6 seconds or more. Check that the warning light remains off after turning off following the initial light check. Slip indicator light illuminates. DTC is stored until it is cleared using the intelligent tester.
      U0123 Lost Communication with Yaw Rate Sensor Module The brake actuator assembly does not receive data from the airbag sensor assembly for 1.1 seconds or more.

      All conditions are met:


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

      • The ignition switch is turned to ON and 1 second elapses.

      • The power source voltage of the brake actuator assembly (+BS terminal voltage) is between 9.6 and 16.5 V.

      		 Turn the ignition switch to ON and drive the vehicle at a speed of 6 km/h (4 mph) or more for 3 seconds or more. Check that the warning light remains off after turning off following the initial light check. Slip indicator light illuminates. DTC is stored until it is cleared using the intelligent tester.
      U0126 Lost Communication with Steering Angle Sensor Module The brake actuator assembly does not receive data from the steering sensor for 1.1 seconds or more.

      All conditions are met:


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

      • The ignition switch is turned to ON and 1 second elapses.

      • The power source voltage of the brake actuator assembly (+BS terminal voltage) is between 9.6 and 16.5 V.

      		 Turn the ignition switch to ON and drive the vehicle at a speed of 6 km/h (4 mph) or more for 3 seconds or more. Check that the warning light remains off after turning off following the initial light check. Slip indicator light illuminates. DTC is stored until it is cleared using the intelligent tester.

    7. Steering Sensor / Intelligent Tester Display "Steering Angle Sensor"

      Tech Tips

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

    8. Airbag Sensor Assembly / Intelligent Tester Display "SRS Airbag"

      Tech Tips

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

    9. Main Body ECU (Multiplex network body ECU) / Intelligent Tester Display "Main Body"

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

      Main Body ECU (Multiplex network body ECU) / Intelligent Tester Display "Main Body"
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter 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 10 seconds or more.

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

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

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

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

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

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

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

      		 Turn the ignition switch to ON and wait at least 10 seconds. - DTC is stored until it is cleared using the intelligent tester.
      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 10 seconds or more.

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

      		 Turn the ignition switch to ON and wait at least 10 seconds. - DTC is stored until it is cleared using the intelligent tester.
      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 10 seconds or more.

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

      		 Turn the ignition switch to ON and wait at least 10 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0182 Lost Communication with AFS ECU The main body ECU (multiplex network body ECU) does not receive data from the AFS ECU for 5 seconds or more.

      Both conditions are met:


      • 5 seconds have elapsed after connection of the battery.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

      		 Turn the ignition switch to ON and wait at least 5 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0327 Software Incompatibility with Vehicle Security Control Module The main body ECU (multiplex network body ECU) does not receive data from the smart key ECU assembly (certification ECU) for 10 seconds or more.

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

      		 Turn the ignition switch to ON and wait at least 10 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U1002 Lost Communication with Gateway Module (Main body) The main body ECU (multiplex network body ECU) does not receive data from ECUs with a sub bus 1 connection record for 10 seconds or more.

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

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

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

      • The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.

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

    10. Smart Key ECU Assembly (Certification ECU) / Intelligent Tester Display "Entry & Start"

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

      Smart Key ECU Assembly (Certification ECU) / Intelligent Tester Display "Entry & Start"
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter DTC Storage Method
      U0100 Lost Communication with ECM / PCM The smart key ECU assembly (certification ECU) does not receive data from the ECM for 10 seconds or more.

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

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

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

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

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

      		 Turn the ignition switch to ON and wait at least 20 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0155 Lost Communication with Combination Meter The smart key ECU assembly (certification ECU) does not receive data from the combination meter assembly for 10 seconds or more.

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

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

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

    11. Smart Key ECU Assembly (Certification ECU) / Intelligent Tester Display "Power Source Control "

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

      Smart Key ECU Assembly (Certification ECU) / Intelligent Tester Display "Power Source Control "
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter DTC Storage Method
      U0100 Lost Communication with ECM / PCM The smart key ECU assembly (certification ECU) does not receive data from the ECM for 10 seconds or more.

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

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

      		 Turn the ignition switch to ON and wait at least 20 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0140 Lost Communication with Main Body ECU The smart key ECU assembly (certification ECU) does not receive data from the main body ECU (multiplex network body ECU) for 3 seconds or more.

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

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

      		 Turn the ignition switch to ON and wait at least 20 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0155 Lost Communication with Combination Meter The smart key ECU assembly (certification ECU) does not receive data from the combination meter assembly for 10 seconds or more.

      Both conditions are met:


      • 10 seconds have elapsed after connection of the battery.

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

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

    12. Air Conditioning Amplifier Assembly / Intelligent Tester Display "Air Conditioner"

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

      Air Conditioning Amplifier Assembly / Intelligent Tester Display "Air Conditioner"
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter DTC Storage Method
      U0100 Lost Communication with ECM The air conditioning amplifier assembly does not receive data from the ECM for 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON

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

      		 Turn the ignition switch to ON and wait at least 5 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0131 Lost Communication with Electric Power Steering ECU The air conditioning amplifier assembly does not receive data from the power steering ECU with motor assembly for 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON

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

      		 Turn the ignition switch to ON and wait at least 5 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0142 Lost Communication with Main Body ECU The air conditioning amplifier assembly does not receive data from the Main body ECU (multiplex network body ECU) for 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON

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

      		 Turn the ignition switch to ON and wait at least 5 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0155 Lost Communication with Combination Meter The air conditioning amplifier assembly does not receive data from the combination meter assembly for 5 seconds or more.

      Both conditions are met:


      • The ignition switch is ON

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

      		 Turn the ignition switch to ON and wait at least 5 seconds. - DTC is stored until it is cleared using the intelligent tester.

    13. Combination Meter Assembly / Intelligent Tester Display "Combination Meter"

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

      Combination Meter Assembly / Intelligent Tester Display "Combination Meter"
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter DTC Storage Method
      U0100 Lost Communication with ECM / PCM "A" The combination meter assembly does not receive data from the ECM for 2 seconds or more.

      Both conditions are met:


      • The ignition switch is ON

      • The power source voltage of the combination meter assembly is between 9.5 and 11.5 V.

      		 Turn the ignition switch to ON and wait at least 2 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0129 Lost Communication with Skid Control ECU The combination meter assembly does not receive data from the brake actuator assembly for 3 seconds or more.

      Both conditions are met:


      • The ignition switch is ON

      • The power source voltage of the combination meter assembly is between 9.5 and 11.5 V.

      		 Turn the ignition switch to ON and wait at least 3 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0131 Lost Communication with Power Steering Control Module The combination meter assembly does not receive data from the power steering ECU with motor assembly for 3 seconds or more.

      Both conditions are met:


      • The ignition switch is ON

      • The power source voltage of the combination meter assembly is between 9.5 and 11.5 V.

      		 Turn the ignition switch to ON and wait at least 3 seconds. EPS warning light illuminates. DTC is stored until it is cleared using the intelligent tester.
      U0142 Lost Communication with Main Body ECU The combination meter assembly does not receive data from the Main body ECU (multiplex network body ECU) for 3 seconds or more.

      Both conditions are met:


      • The ignition switch is ON

      • The power source voltage of the combination meter assembly is between 9.5 and 11.5 V.

      		 Turn the ignition switch to ON and wait at least 3 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0151 Lost Communication with Airbag ECU The combination meter assembly does not receive data from the airbag sensor assembly for 10 seconds or more.

      Both conditions are met:


      • The ignition switch is ON

      • The power source voltage of the combination meter assembly is between 9.5 and 11.5 V.

      		 Turn the ignition switch to ON and wait at least 10 seconds. SRS warning light illuminates. DTC is stored until it is cleared using the intelligent tester.

    14. Navigation ECU Sub-Assembly (for Navigation receiver type) / Intelligent Tester Display "Navigation System"

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

      Navigation ECU Sub-Assembly (for Navigation receiver type) / Intelligent Tester Display "Navigation System"
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter DTC Storage Method
      U0073 Sending Malfunction (Navigation to APGS) The navigation ECU sub-assembly does not send/receive data 10 times in succession.

      Both conditions are met:


      • The ignition switch is turned to ACC and 1 second elapses.

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

      		 Turn the ignition switch to ACC and wait at least 11 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0100 Lost Communication with ECM The navigation ECU sub-assembly does not receive data from the ECM for 4 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 1 second elapses.

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

      		 Turn the ignition switch to ON and wait at least 5 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0126 Lost Communication with Steering Angle Sensor Module The navigation ECU sub-assembly does not receive data from the steering sensor for 1.12 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 1 second elapses.

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

      		 Turn the ignition switch to ON and wait at least 2.12 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0140 Lost Communication with Body Control Module The navigation ECU sub-assembly does not receive data from the main body ECU (multiplex network body ECU) for 3 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 1 second elapses.

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

      		 Turn the ignition switch to ON and wait at least 4 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0155 Meter ECU Communication The navigation ECU sub-assembly does not receive data from the combination meter assembly for 30 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 1 second elapses.

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

      		 Turn the ignition switch to ON and wait at least 31 seconds. - DTC is stored until it is cleared using the intelligent tester.

    15. Radio and Display Receiver Assembly (for Radio and display type) / Intelligent Tester Display "Navigation System"

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

      Radio and Display Receiver Assembly (for Radio and display type) / Intelligent Tester Display "Navigation System"
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter DTC Storage Method
      U0073 Sending Malfunction (Navigation to APGS) The radio and display receiver assembly does not send/receive data 10 times in succession.

      Both conditions are met:


      • The ignition switch is turned to ACC and 1 second elapses.

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

      		 Turn the ignition switch to ACC and wait at least 11 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0100 Lost Communication with ECM The radio and display receiver assembly does not receive data from the ECM for 4 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 1 second elapses.

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

      		 Turn the ignition switch to ON and wait at least 5 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0140 Lost Communication with Body Control Module The radio and display receiver assembly does not receive data from the main body ECU (multiplex network body ECU) for 3 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 1 second elapses.

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

      		 Turn the ignition switch to ON and wait at least 4 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0155 Meter ECU Communication The radio and display receiver assembly does not receive data from the combination meter assembly for 30 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 1 second elapses.

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

      		 Turn the ignition switch to ON and wait at least 31 seconds. - DTC is stored until it is cleared using the intelligent tester.

    16. AFS ECU / Intelligent Tester Display "AFS"

      Tech Tips


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

      • *1: Refer to Adaptive Front- Lighting System Click here.

      AFS ECU / Intelligent Tester Display "AFS"
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter DTC Storage Method
      U0073 Control Module Communication Bus Off The AFS ECU does not send/receive data 10 times in succession.

      Both conditions are met:


      • The ignition switch is turned to ON and 3 seconds elapse.

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

      		 Turn the ignition switch to ON and wait at least 13 seconds. - DTC is stored until it is cleared using the intelligent tester.
      U0100 Lost Communication with ECM The AFS ECU does not receive data from the ECM for 10 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 3 seconds elapse.

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

      		 Turn the ignition switch to ON and wait at least 13 seconds. AFS warning light illuminates. DTC is stored until it is cleared using the intelligent tester.
      U0101 Lost Communication with TCM The AFS ECU does not receive data from the TCM for 10 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 3 seconds elapse.

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

      		 Turn the ignition switch to ON and wait at least 13 seconds. AFS warning light illuminates. DTC is stored until it is cleared using the intelligent tester.
      U0126 Lost Communication with Steering Angle Sensor Module The AFS ECU does not receive data from the steering sensor for 5 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 3 seconds elapse.

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

      		 Turn the ignition switch to ON and wait at least 8 seconds. AFS warning light illuminates. DTC is stored until it is cleared using the intelligent tester.
      U0129 Lost Communication with Skid Control ECU The AFS ECU does not receive data from the brake actuator assembly for 5 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 3 seconds elapse.

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

      		 Turn the ignition switch to ON and wait at least 13 seconds. AFS warning light illuminates. DTC is stored until it is cleared using the intelligent tester.
      U0142 Lost Communication with Main Body ECU The AFS ECU does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 3 seconds elapse.

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

      		 Turn the ignition switch to ON and wait at least 13 seconds. AFS warning light illuminates. DTC is stored until it is cleared using the intelligent tester.
      U1000*1 Can Communication Failure(Message Registry) The AFS ECU does not send/receive data 10 times in succession.

      Both conditions are met:


      • The ignition switch is turned to ON and 3 seconds elapse.

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

      		 Turn the ignition switch to ON and wait at least 13 seconds. AFS warning light illuminates. DTC is stored until it is cleared using the intelligent tester.

    17. Clearance Warning ECU Assembly / Intelligent Tester Display "Clearance Sonar"

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

      Clearance Warning ECU Assembly / Intelligent Tester Display "Clearance Sonar"
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter DTC Storage Method
      U0100 Lost Communication with ECM / PCM "A" The clearance warning ECU assembly does not receive data from the ECM for 5.75 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 2 seconds elapse.

      • The power source voltage of the clearance warning ECU assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait at least 7.75 seconds or more. - DTC is stored until it is cleared using the intelligent tester.
      U0101 Lost Communication with TCM The clearance warning ECU assembly does not receive data from the TCM for 8.07 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 2 seconds elapse.

      • The power source voltage of the clearance warning ECU assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait at least 10.07 seconds or more. - DTC is stored until it is cleared using the intelligent tester.
      U0142 Lost Communication with Body Control Module "B" The clearance warning ECU assembly does not receive data from the main body ECU (multiplex network body ECU) for 5.9 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 2 seconds elapse.

      • The power source voltage of the clearance warning ECU assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait at least 7.9 seconds or more. - DTC is stored until it is cleared using the intelligent tester.
      U0155 Lost Communication with Instrument Panel Cluster Control Module (Combination Meter) The clearance warning ECU assembly does not receive data from the combination meter assembly for 6.5 seconds or more.

      Both conditions are met:


      • The ignition switch is turned to ON and 2 seconds elapse.

      • The power source voltage of the clearance warning ECU assembly is 10 V or more.

      		 Turn the ignition switch to ON and wait at least 8.5 seconds or more. - DTC is stored until it is cleared using the intelligent tester.

    18. Multiplex Tilt and Telescopic ECU / Intelligent Tester Display "Tilt & Telescopic"

      Tech Tips

      This ECU uses the CAN communication system for DTC communication.

      Multiplex Tilt and Telescopic ECU / Intelligent Tester Display "Tilt & Telescopic"
      DTC Detection Item DTC Detection Condition DTC Detection Pre-condition DTC Check Procedure Warning Indication in Meter DTC Storage Method
      U0142 Lost Communication with Main Body ECU The multiplex tilt and telescopic ECU does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more. The power source voltage of the multiplex tilt and telescopic ECU is 10.1 V or more. Turn the ignition switch to ON and wait at least 10 seconds or more. - DTC is stored until it is cleared using the intelligent tester.

  8. DTC COMBINATION TABLE (OPEN IN CAN BRANCH OF V BUS, PAST COMMUNICATION ERROR)


    1. Regarding a past communication error of an ECU or sensor connected to the V bus (in this case, normal is displayed when performing the communication bus check, but communication DTCs are output), the probable CAN branch that had a malfunction can be determined based on the following DTC combination table.

      Tech Tips


      • Based on the table below and DTCs output from ECUs connected via CAN communication, the probable part for which communication stop occurred can be determined.

      • Regarding an open in a CAN branch and a communication stop that is currently occurring, the malfunctioning part can be confirmed easily by performing the communication bus check using the intelligent tester because the ECU or sensor connected to the CAN branch does not respond (the ECU or sensor name will not be displayed on the screen).

      • If an open in a CAN main bus line, a short between the CAN bus lines (CANH and CANL) or a +B or ground short in the CAN bus occurs, DTCs of almost all ECUs (or sensors) on the CAN bus may be output, or a message indicating a communication error may be displayed on the intelligent tester screen. In this case, check the resistance of the CAN bus (steps 7 to 9) first Click here.

      • If an open occurs in just one of the lines of a CAN branch, DTCs which are not related to malfunctioning parts may be output (DTCs may be displayed randomly), or a message indicating a communication error may be displayed.

      for LHD
      - Trouble Mode
      V Bus (Open in one CAN branch line)
      Output ECU Output DTC

      Center Airbag Sensor Communication Stop Mode Click here

      Air Conditioning Amplifier Communication Stop Mode Click here

      AFS ECU Communication Stop Mode Click here

      Navigation ECU Communication Stop Mode Click here

      V Bus Airbag Sensor Assembly - - - - -
      Air Conditioning Amplifier Assembly U0100 - ○ - -
      U0131 - ○ - -
      U0142 - ○ - -
      U0155 - ○ - -
      AFS ECU U0073 - - - -
      U0100 - - ○ -
      U0101 - - ○ -
      U0126 - - ○ -
      U0129 - - ○ -
      U0142 - - ○ -

      • Navigation ECU Sub-assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 - - - ○
      U0100 - - - ○
      U0126*2 X X X ○
      U0140 - - - ○
      U0155 - - - ○
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - - - -
      U0101 - - - -
      U0120 - - - -
      U0151 ○ - - -
      U0155 - - - -
      U0164 - ○ - -
      U0182 - - ○ -
      U0327 - - - -
      V Bus Clearance Warning ECU Assembly U0100 - - - -
      U0101 - - - -
      U0142 - - - -
      U0155 - - - -
      ECM - - - - -
      Power Steering ECU with Motor Assembly U0100 - - - -
      U0129 - - - -
      Smart Key ECU Assembly (Certification ECU) U0100 - - - -
      U0140 - - - -
      U0142 - - - -
      U0155 - - - -
      Combination Meter Assembly U0100 - - - -
      U0129 - - - -
      U0131 - - - -
      U0142 - - - -
      U0151 ○ - - -
      Steering Sensor - - - - -
      Brake Actuator Assembly U0073 - - - -
      U0100 ○ ○ ○ ○
      U0123 ○ ○ ○ ○
      U0126 ○ ○ ○ ○
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 - - - -
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 - - - -
      U1115 - - - -
      - Trouble Mode
      V Bus (Open in one CAN branch line)
      Output ECU Output DTC

      Audio Receiver Assembly Communication Stop Mode Click here

      Main Body ECU Communication Stop Mode Click here

      Clearance Warning ECU Communication Stop Mode Click here

      V Bus Airbag Sensor Assembly - - - -
      Air Conditioning Amplifier Assembly U0100 - - -
      U0131 - - -
      U0142 - ○ -
      U0155 - - -
      AFS ECU U0073 - - -
      U0100 - - -
      U0101 - - -
      U0126 - - -
      U0129 - - -
      U0142 - ○ -
      V Bus

      • Navigation ECU Sub-assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 ○ - -
      U0100 ○ - -
      U0126*2 ○ X X
      U0140 ○ ○ -
      U0155 ○ - -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - ○ -
      U0101 - ○ -
      U0120 - ○ -
      U0151 - ○ -
      U0155 - ○ -
      U0164 - ○ -
      U0182 - ○ -
      U0327 - ○ -
      Clearance Warning ECU Assembly U0100 - - ○
      U0101 - - ○
      U0142 - ○ ○
      U0155 - - ○
      ECM - - - -
      Power Steering ECU with Motor Assembly U0100 - - -
      U0129 - - -
      Smart Key ECU Assembly (Certification ECU) U0100 - - -
      U0140 - ○ -
      U0142 - ○ -
      U0155 - - -
      Combination Meter Assembly U0100 - - -
      U0129 - - -
      U0131 - - -
      U0142 - ○ -
      U0151 - - -
      Steering Sensor - - - -
      Brake Actuator Assembly U0073 - - -
      U0100 ○ ○ ○
      U0123 ○ ○ ○
      U0126 ○ ○ ○
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 - - -
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 - - -
      U1115 - - -
      - Trouble Mode (Open in one CAN branch line)
      V Bus
      Output ECU Output DTC

      Power Steering ECU Communication Stop Mode Click here

      Certification ECU Communication Stop Mode Click here

      Steering Angle Sensor Communication Stop Mode Click here

      V Bus Airbag Sensor Assembly - - - -
      Air Conditioning Amplifier Assembly U0100 - - -
      U0131 ○ - -
      U0142 - - -
      U0155 - - -
      AFS ECU U0073 - - -
      U0100 - - -
      U0101 - - -
      U0126 - - ○
      U0129 - - -
      U0142 - - -

      • Navigation ECU Sub-assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 - - -
      U0100 - - -
      U0126*2 X X ○
      U0140 - - -
      U0155 - - -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - - -
      U0101 - - -
      U0120 - ○ -
      U0151 - - -
      U0155 - - -
      U0164 - - -
      U0182 - - -
      U0327 - ○ -
      Clearance Warning ECU Assembly U0100 - - -
      U0101 - - -
      U0142 - - -
      U0155 - - -
      ECM - - - -
      Power Steering ECU with Motor Assembly U0100 ○ - -
      U0129 ○ - -
      Smart Key ECU Assembly (Certification ECU) U0100 X ○ -
      U0140 - ○ -
      U0142 - ○ -
      U0155 - ○ -
      V Bus Combination Meter Assembly U0100 - - -
      U0129 X - -
      U0131 ○ - -
      U0142 - - -
      U0151 - - -
      Steering Sensor - - - -
      Brake Actuator Assembly U0073 - - -
      U0100 ○ ○ ○
      U0123 ○ ○ ○
      U0126 ○ ○ ○
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 - - -
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 - - -
      U1115 - - -
      - Trouble Mode (Open in one CAN branch line)
      V Bus
      Output ECU Output DTC

      Skid Control ECU Communication Stop Mode Click here

      		DLC3
      V Bus Airbag Sensor Assembly - - -
      Air Conditioning Amplifier Assembly U0100 - -
      U0131 - -
      U0142 - -
      U0155 - -
      AFS ECU U0073 - -
      U0100 - -
      U0101 - -
      U0126 - -
      U0129 ○ -
      U0142 - -

      • Navigation ECU Sub-assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 - -
      U0100 - -
      U0126*2 X X
      U0140 - -
      U0155 - -
      V Bus Main Body ECU (Multiplex Network Body ECU)*1 U0100 - -
      U0101 - -
      U0120 - -
      U0151 - -
      U0155 - -
      U0164 - -
      U0182 - -
      U0327 - -
      Clearance Warning ECU Assembly U0100 - -
      U0101 - -
      U0142 - -
      U0155 - -
      ECM - - -
      Power Steering ECU with Motor Assembly U0100 - -
      U0129 ○ -
      Smart Key ECU Assembly (Certification ECU) U0100 X -
      U0140 - -
      U0142 - -
      U0155 - -
      Combination meter assembly U0100 - -
      U0129 ○ -
      U0131 - -
      U0142 - -
      U0151 - -
      Steering Sensor - - -
      Brake Actuator Assembly U0073 ○ -
      U0100 ○ ○
      U0123 ○ ○
      U0126 ○ ○
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 - -
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 - -
      U1115 - -

      Tech Tips


      • ○: Set

      • X: Not set or may be set according to the malfunctioning part when one line of a CAN branch is open.

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

      • *2: w/ Parking assist monitor system.

      for LHD
      - Trouble Mode (Open in both CAN branch lines)
      V Bus
      Output ECU Output DTC

      Center Airbag Sensor Communication Stop Mode Click here

      Air Conditioning Amplifier Communication Stop Mode Click here

      AFS ECU Communication Stop Mode Click here

      Navigation ECU Communication Stop Mode Click here

      V Bus Airbag Sensor Assembly - - - - -
      Air Conditioning Amplifier Assembly U0100 - ○ - -
      U0131 - ○ - -
      U0142 - ○ - -
      U0155 - ○ - -
      AFS ECU U0073 - - ○ -
      U0100 - - ○ -
      U0101 - - ○ -
      U0126 - - ○ -
      U0129 - - ○ -
      U0142 - - ○ -

      • Navigation ECU Sub-assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 - - - ○
      U0100 - - - ○
      U0126*2 - - - ○
      U0140 - - - ○
      U0155 - - - ○
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - - - -
      U0101 - - - -
      U0120 - - - -
      U0151 ○ - - -
      U0155 - - - -
      U0164 - ○ - -
      U0182 - - ○ -
      U0327 - - - -
      Clearance Warning ECU Assembly U0100 - - - -
      U0101 - - - -
      U0142 - - - -
      U0155 - - - -
      ECM - - - - -
      Power Steering ECU with Motor Assembly U0100 - - - -
      U0129 - - - -
      V Bus Smart Key ECU Assembly (Certification ECU) U0100 - - - -
      U0140 - - - -
      U0142 - - - -
      U0155 - - - -
      Combination Meter Assembly U0100 - - - -
      U0129 - - - -
      U0131 - - - -
      U0142 - - - -
      U0151 ○ - - -
      Steering Sensor - - - - -
      Brake Actuator Assembly U0073 - - - -
      U0100 - - - -
      U0123 ○ - - -
      U0126 - - - -
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 - - - -
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 - - - -
      U1115 - - - -
      - Trouble Mode (Open in both CAN branch lines)
      V Bus
      Output ECU Output DTC

      Audio Receiver Assembly Communication Stop Mode Click here

      Main Body ECU Communication Stop Mode Click here

      Clearance Warning ECU Communication Stop Mode Click here

      V Bus Airbag Sensor Assembly - - - -
      Air Conditioning Amplifier Assembly U0100 - - -
      U0131 - - -
      U0142 - ○ -
      U0155 - - -
      AFS ECU U0073 - - -
      U0100 - - -
      U0101 - - -
      U0126 - - -
      U0129 - - -
      U0142 - ○ -
      V Bus

      • Navigation ECU Sub-assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 ○ - -
      U0100 ○ - -
      U0126*2 ○ - -
      U0140 ○ ○ -
      U0155 ○ - -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - ○ -
      U0101 - ○ -
      U0120 - ○ -
      U0151 - ○ -
      U0155 - ○ -
      U0164 - ○ -
      U0182 - ○ -
      U0327 - ○ -
      Clearance Warning ECU Assembly U0100 - - ○
      U0101 - - ○
      U0142 - ○ ○
      U0155 - - ○
      ECM - - - -
      Power Steering ECU with Motor Assembly U0100 - - -
      U0129 - - -
      Smart Key ECU Assembly (Certification ECU) U0100 - - -
      U0140 - ○ -
      U0142 - ○ -
      U0155 - - -
      Combination Meter Assembly U0100 - - -
      U0129 - - -
      U0131 - - -
      U0142 - ○ -
      U0151 - - -
      Steering Sensor - - - -
      Brake Actuator Assembly U0073 - - -
      U0100 - - -
      U0123 - - -
      U0126 - - -
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 - - -
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 - - -
      U1115 - - -
      - Trouble Mode (Open in both CAN branch lines)
      V Bus
      Output ECU Output DTC

      Power Steering ECU Communication Stop Mode Click here

      Certification ECU Communication Stop Mode Click here

      Steering Angle Sensor Communication Stop Mode Click here

      V Bus Airbag Sensor Assembly - - - -
      Air Conditioning Amplifier Assembly U0100 - - -
      U0131 ○ - -
      U0142 - - -
      U0155 - - -
      AFS ECU U0073 - - -
      U0100 - - -
      U0101 - - -
      U0126 - - ○
      U0129 - - -
      U0142 - - -

      • Navigation ECU Sub-assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 - - -
      U0100 - - -
      U0126*2 - - ○
      U0140 - - -
      U0155 - - -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - - -
      U0101 - - -
      U0120 - ○ -
      U0151 - - -
      U0155 - - -
      U0164 - - -
      U0182 - - -
      U0327 - ○ -
      Clearance Warning ECU Assembly U0100 - - -
      U0101 - - -
      U0142 - - -
      U0155 - - -
      V Bus ECM - - - -
      Power Steering ECU with Motor Assembly U0100 ○ - -
      U0129 ○ - -
      Smart Key ECU Assembly (Certification ECU) U0100 - ○ -
      U0140 - ○ -
      U0142 - ○ -
      U0155 - ○ -
      Combination Meter Assembly U0100 - - -
      U0129 - - -
      U0131 ○ - -
      U0142 - - -
      U0151 - - -
      Steering Sensor - - - -
      Brake Actuator Assembly U0073 - - -
      U0100 - - ○
      U0123 - - -
      U0126 - - ○
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 - - -
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 - - -
      U1115 - - -
      - Trouble Mode (Open in both CAN branch lines)
      V Bus
      Output ECU Output DTC

      Skid Control ECU Communication Stop Mode Click here

      		DLC3
      V Bus Airbag Sensor Assembly - - -
      Air Conditioning Amplifier Assembly U0100 - -
      U0131 - -
      U0142 - -
      U0155 - -
      AFS ECU U0073 - -
      U0100 - -
      U0101 - -
      U0126 - -
      U0129 ○ -
      U0142 - -

      • Navigation ECU Sub-assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 - -
      U0100 - -
      U0126*2 - -
      U0140 - -
      U0155 - -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - -
      U0101 - -
      U0120 - -
      U0151 - -
      U0155 - -
      U0164 - -
      U0182 - -
      U0327 - -
      Clearance Warning ECU Assembly U0100 - -
      U0101 - -
      U0142 - -
      U0155 - -
      ECM - - -
      Power Steering ECU with Motor Assembly U0100 - -
      U0129 ○ -
      V Bus Smart Key ECU Assembly (Certification ECU) U0100 - -
      U0140 - -
      U0142 - -
      U0155 - -
      Combination Meter Assembly U0100 - -
      U0129 ○ -
      U0131 - -
      U0142 - -
      U0151 - -
      Steering Sensor - - -
      Brake Actuator Assembly U0073 ○ -
      U0100 ○ -
      U0123 ○ -
      U0126 ○ -
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 - -
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 - -
      U1115 - -

      Tech Tips


      • ○: Set

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

      • *2: w/ Parking assist monitor system.

      for LHD
      - Trouble Mode (Open in one CAN main bus line)
      V Bus
      Output ECU Output DTC

      Combination Meter ECU Communication Stop Mode Click here

      		CAN No. 1 J/C to CAN No. 2 J/C

      ECM Communication Stop Mode Click here

      V Bus Airbag Sensor Assembly - - - -
      Air Conditioning Amplifier Assembly U0100 - - ○
      U0131 - - ○
      U0142 - ○ -
      U0155 - ○ -
      AFS ECU U0073 - - -
      U0100 - ○ ○
      U0101 - ○ ○
      U0126 - - -
      U0129 - ○ -
      U0142 - - -
      V Bus

      • Navigation ECU Sub-assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 - ○ -
      U0100 - - ○
      U0126*2 X ○ X
      U0140 X ○ -
      U0155 ○ ○ -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - ○ ○
      U0101 - ○ ○
      U0120 - ○ -
      U0151 - - -
      U0155 ○ - -
      U0164 - ○ -
      U0182 - - -
      U0327 - ○ -
      Clearance Warning ECU Assembly U0100 - - ○
      U0101 - - ○
      U0142 - ○ -
      U0155 ○ ○ -
      ECM - - - -
      Power Steering ECU with Motor Assembly U0100 - ○ ○
      U0129 - ○ -
      Smart Key ECU Assembly (Certification ECU) U0100 - - ○
      U0140 - - -
      U0142 - - -
      U0155 ○ ○ -
      Combination Meter Assembly U0100 ○ ○ ○
      U0129 ○ ○ -
      U0131 ○ - -
      U0142 ○ - -
      U0151 ○ - -
      Steering Sensor - - - -
      Brake Actuator Assembly U0073 - - -
      U0100 ○ ○ ○
      U0123 ○ ○ ○
      U0126 ○ ○ ○
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 - - -
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 - - -
      U1115 - - -

      Tech Tips


      • ○: Set

      • X: Not set or may be set according to the malfunctioning part when one line of a CAN branch is open.

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

      • *2: w/ Parking assist monitor system.

      for LHD
      - Trouble Mode (Open in both CAN main bus lines)
      V Bus
      Output ECU Output DTC

      Combination Meter ECU Communication Stop Mode Click here

      		CAN No. 1 J/C to CAN No. 2 J/C

      ECM Communication Stop Mode Click here

      V Bus Airbag Sensor Assembly - - - -
      Air Conditioning Amplifier Assembly U0100 - - ○
      U0131 - ○ -
      U0142 - ○ -
      U0155 ○ ○ -
      AFS ECU U0073 - - -
      U0100 - ○ ○
      U0101 - ○ ○
      U0126 - - -
      U0129 - ○ -
      U0142 - - -

      • Navigation ECU Sub-assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 - - -
      U0100 - - ○
      U0126*2 - ○ -
      U0140 - ○ -
      U0155 ○ ○ -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - ○ ○
      U0101 - ○ ○
      U0120 - ○ -
      U0151 - - -
      U0155 ○ - -
      U0164 - ○ -
      U0182 - - -
      U0327 - ○ -
      Clearance Warning ECU Assembly U0100 - - ○
      U0101 - - ○
      U0142 - ○ -
      U0155 ○ ○ -
      ECM - - - -
      Power Steering ECU with Motor Assembly U0100 - ○ ○
      U0129 - ○ -
      V Bus Smart Key ECU Assembly (Certification ECU) U0100 - - ○
      U0140 - - -
      U0142 - - -
      U0155 ○ ○ -
      Combination Meter Assembly U0100 ○ ○ ○
      U0129 ○ ○ -
      U0131 ○ - -
      U0142 ○ - -
      U0151 ○ - -
      Steering Sensor - - - -
      Brake Actuator Assembly U0073 - - -
      U0100 - ○ ○
      U0123 - ○ -
      U0126 - ○ -
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 - - -
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 - - -
      U1115 - - -

      Tech Tips


      • ○: Set

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

      • *2: w/ Parking assist monitor system.

      for LHD
      - Trouble Mode (CAN bus line short circuit or short to GND)
      V Bus
      Output ECU Output DTC CAN No. 1 J/C to CAN No. 2 J/C
      V Bus Airbag Sensor Assembly - -
      Air Conditioning Amplifier Assembly U0100 ○
      U0131 ○
      U0142 ○
      U0155 ○
      AFS ECU U0073 ○
      U0100 ○
      U0101 ○
      U0126 ○
      U0129 ○
      U0142 ○
      V Bus

      • Navigation ECU Sub-assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 ○
      U0100 ○
      U0126*2 ○
      U0140 ○
      U0155 ○
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 ○
      U0101 ○
      U0120 ○
      U0151 ○
      U0155 ○
      U0164 ○
      U0182 ○
      U0327 ○
      Clearance Warning ECU Assembly U0100 ○
      U0101 ○
      U0142 ○
      U0155 ○
      ECM - -
      Power Steering ECU with Motor Assembly U0100 ○
      U0129 ○
      Smart Key ECU Assembly (Certification ECU) U0100 ○
      U0140 ○
      U0142 ○
      U0155 ○
      Combination Meter Assembly U0100 ○
      U0129 ○
      U0131 ○
      U0142 ○
      U0151 ○
      Steering Sensor - -
      Brake Actuator Assembly U0073 ○
      U0100 ○
      U0123 ○
      U0126 ○
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 -
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 -
      U1115 -

      Tech Tips


      • ○: Set

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

      • *2: w/ Parking assist monitor system.

      for RHD
      - Trouble Mode
      V Bus (Open in one CAN branch line)
      Output ECU Output DTC

      Center Airbag Sensor Communication Stop Mode Click here

      Air Conditioning Amplifier Communication Stop Mode Click here

      Audio Receiver Assembly Communication Stop Mode Click here

      Main Body ECU Communication Stop Mode Click here

      V Bus Airbag Sensor Assembly - - - - -
      Air Conditioning Amplifier Assembly U0100 - ○ - -
      U0131 - ○ - -
      U0142 - ○ - ○
      U0155 - ○ - -
      Radio and Display Receiver Assembly (for Radio and Display Type) U0073 - - ○ -
      U0100 - - ○ -
      U0140 - - ○ ○
      U0155 - - ○ -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - - - ○
      U0101 - - - ○
      U0120 - - - ○
      U0151 ○ - - ○
      U0155 - - - ○
      U0164 - ○ - ○
      U0327 - - - ○
      Clearance Warning ECU Assembly U0100 - - - -
      U0101 - - - -
      U0142 - - - ○
      U0155 - - - -
      ECM - - - - -
      Power Steering ECU with Motor Assembly U0100 - - - -
      U0129 ○ ○ ○ ○
      Smart Key ECU Assembly (Certification ECU) U0100 - - - -
      U0140 - - - ○
      U0142 - - - ○
      U0155 - - - -
      Combination Meter Assembly U0100 - - - -
      U0129 ○ ○ ○ ○
      U0131 - - - -
      U0142 - - - ○
      U0151 ○ - - -
      Steering Sensor - - - - -
      Brake Actuator Assembly U0073 - - - -
      U0100 ○ ○ ○ ○
      U0123 ○ ○ ○ ○
      U0126 ○ ○ ○ ○
      - Trouble Mode (Open in one CAN branch line)
      V Bus
      Output ECU Output DTC

      Clearance Warning ECU Communication Stop Mode Click here

      Power Steering ECU Communication Stop Mode Click here

      Certification ECU Communication Stop Mode Click here

      Steering Angle Sensor Communication Stop Mode Click here

      V Bus Airbag Sensor Assembly - - - - -
      Air Conditioning Amplifier Assembly U0100 - - - -
      U0131 - ○ - -
      U0142 - - - -
      U0155 - - - -
      Radio and Display Receiver Assembly (for Radio and Display Type) U0073 - - - -
      U0100 - - - -
      U0140 - - - -
      U0155 - - - -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - - - -
      U0101 - - - -
      U0120 - - ○ -
      U0151 - - - -
      U0155 - - - -
      U0164 - - - -
      U0327 - - ○ -
      Clearance Warning ECU Assembly U0100 ○ - - -
      U0101 ○ - - -
      U0142 ○ - - -
      U0155 ○ - - -
      ECM - - - - -
      Power Steering ECU with Motor Assembly U0100 - ○ - -
      U0129 ○ ○ ○ ○
      Smart Key ECU Assembly (Certification ECU) U0100 - - ○ -
      U0140 - - ○ -
      U0142 - - ○ -
      U0155 - - ○ -
      Combination Meter Assembly U0100 - - - -
      U0129 ○ ○ ○ ○
      U0131 - ○ - -
      U0142 - - - -
      U0151 - - - -
      Steering Sensor - - - - -
      Brake Actuator Assembly U0073 - - - -
      U0100 ○ ○ ○ ○
      U0123 ○ ○ ○ ○
      U0126 ○ ○ ○ ○
      - Trouble Mode (Open in one CAN branch line)
      V Bus
      Output ECU Output DTC

      Skid Control ECU Communication Stop Mode Click here

      		DLC3
      V Bus Airbag Sensor Assembly - - -
      Air Conditioning Amplifier Assembly U0100 - -
      U0131 - -
      U0142 - -
      U0155 - -
      Radio and Display Receiver Assembly (for Radio and Display Type) U0073 - -
      U0100 - -
      U0140 - -
      U0155 - -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - -
      U0101 - -
      U0120 - -
      U0151 - -
      U0155 - -
      U0164 - -
      U0327 - -
      Clearance Warning ECU Assembly U0100 - -
      U0101 - -
      U0142 - -
      U0155 - -
      ECM - - -
      Power Steering ECU with Motor Assembly U0100 - -
      U0129 ○ ○
      Smart Key ECU Assembly (Certification ECU) U0100 - -
      U0140 - -
      U0142 - -
      U0155 - -
      Combination meter assembly U0100 - -
      U0129 ○ ○
      U0131 - -
      U0142 - -
      U0151 - -
      Steering Sensor - - -
      Brake Actuator Assembly U0073 ○ -
      U0100 ○ ○
      U0123 ○ ○
      U0126 ○ ○

      Tech Tips


      • ○: Set

      • X: Not set or may be set according to the malfunctioning part when one line of a CAN branch is open.

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

      for RHD
      - Trouble Mode (Open in both CAN branch lines)
      V Bus
      Output ECU Output DTC

      Center Airbag Sensor Communication Stop Mode Click here

      Air Conditioning Amplifier Communication Stop Mode Click here

      Audio Receiver Assembly Communication Stop Mode Click here

      Main Body ECU Communication Stop Mode Click here

      V Bus Airbag Sensor Assembly - - - - -
      Air Conditioning Amplifier Assembly U0100 - ○ - -
      U0131 - ○ - -
      U0142 - ○ - ○
      U0155 - ○ - -
      Radio and Display Receiver Assembly (for Radio and Display Type) U0073 - - ○ -
      U0100 - - ○ -
      U0140 - - ○ ○
      U0155 - - ○ -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - - - ○
      U0101 - - - ○
      U0120 - - - ○
      U0151 ○ - - ○
      U0155 - - - ○
      U0164 - ○ - ○
      U0327 - - - ○
      Clearance Warning ECU Assembly U0100 - - - -
      U0101 - - - -
      U0142 - - - ○
      U0155 - - - -
      ECM - - - - -
      Power Steering ECU with Motor Assembly U0100 - - - -
      U0129 ○ ○ ○ ○
      Smart Key ECU Assembly (Certification ECU) U0100 - - - -
      U0140 - - - ○
      U0142 - - - ○
      U0155 - - - -
      Combination Meter Assembly U0100 - - - -
      U0129 ○ ○ ○ ○
      U0131 - - - -
      U0142 - - - ○
      U0151 ○ - - -
      Steering Sensor - - - - -
      Brake Actuator Assembly U0073 - - - -
      U0100 - - - -
      U0123 ○ - - -
      U0126 - - - -
      - Trouble Mode (Open in both CAN branch lines)
      V Bus
      Output ECU Output DTC

      Clearance Warning ECU Communication Stop Mode Click here

      Power Steering ECU Communication Stop Mode Click here

      Certification ECU Communication Stop Mode Click here

      Steering Angle Sensor Communication Stop Mode Click here

      V Bus Airbag Sensor Assembly - - - - -
      Air Conditioning Amplifier Assembly U0100 - - - -
      U0131 - ○ - -
      U0142 - - - -
      U0155 - - - -
      Radio and Display Receiver Assembly (for Radio and Display Type) U0073 - - - -
      U0100 - - - -
      U0140 - - - -
      U0155 - - - -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - - - -
      U0101 - - - -
      U0120 - - ○ -
      U0151 - - - -
      U0155 - - - -
      U0164 - - - -
      U0327 - - ○ -
      Clearance Warning ECU Assembly U0100 ○ - - -
      U0101 ○ - - -
      U0142 ○ - - -
      U0155 ○ - - -
      ECM - - - - -
      Power Steering ECU with Motor Assembly U0100 - ○ - -
      U0129 ○ ○ ○ ○
      Smart Key ECU Assembly (Certification ECU) U0100 - - ○ -
      U0140 - - ○ -
      U0142 - - ○ -
      U0155 - - ○ -
      Combination Meter Assembly U0100 - - - -
      U0129 ○ ○ ○ ○
      U0131 - ○ - -
      U0142 - - - -
      U0151 - - - -
      Steering Sensor - - - - -
      Brake Actuator Assembly U0073 - - - -
      U0100 - - - ○
      U0123 - - - -
      U0126 - - - ○
      - Trouble Mode (Open in both CAN branch lines)
      V Bus
      Output ECU Output DTC

      Skid Control ECU Communication Stop Mode Click here

      		DLC3
      V Bus Airbag Sensor Assembly - - -
      Air Conditioning Amplifier Assembly U0100 - -
      U0131 - -
      U0142 - -
      U0155 - -
      Radio and Display Receiver Assembly (for Radio and Display Type) U0073 - -
      U0100 - -
      U0140 - -
      U0155 - -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - -
      U0101 - -
      U0120 - -
      U0151 - -
      U0155 - -
      U0164 - -
      U0327 - -
      Clearance Warning ECU Assembly U0100 - -
      U0101 - -
      U0142 - -
      U0155 - -
      ECM - - -
      Power Steering ECU with Motor Assembly U0100 - -
      U0129 ○ ○
      Smart Key ECU Assembly (Certification ECU) U0100 - -
      U0140 - -
      U0142 - -
      U0155 - -
      Combination Meter Assembly U0100 - -
      U0129 ○ ○
      U0131 - -
      U0142 - -
      U0151 - -
      Steering Sensor - - -
      Brake Actuator Assembly U0073 ○ -
      U0100 ○ -
      U0123 ○ -
      U0126 ○ -

      Tech Tips


      • ○: Set

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

      for RHD
      - Trouble Mode (Open in one CAN main bus line)
      V Bus
      Output ECU Output DTC

      Combination Meter ECU Communication Stop Mode Click here

      		CAN No. 1 J/C to CAN No. 2 J/C

      ECM Communication Stop Mode Click here

      V Bus Airbag Sensor Assembly - - - -
      Air Conditioning Amplifier Assembly U0100 - - ○
      U0131 - - ○
      U0142 - - -
      U0155 ○ ○ -
      Radio and Display Receiver Assembly (for Radio and Display Type) U0073 - - -
      U0100 - - ○
      U0140 X - -
      U0155 ○ ○ -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - - ○
      U0101 - - ○
      U0120 - - -
      U0151 - - -
      U0155 ○ - -
      U0164 - ○ -
      U0327 - - -
      Clearance Warning ECU Assembly U0100 - ○ ○
      U0101 - ○ ○
      U0142 - ○ -
      U0155 ○ - -
      ECM - - - -
      Power Steering ECU with Motor Assembly U0100 - ○ ○
      U0129 - ○ ○
      Smart Key ECU Assembly (Certification ECU) U0100 - - ○
      U0140 - ○ -
      U0142 - ○ -
      U0155 ○ - -
      Combination Meter Assembly U0100 ○ ○ ○
      U0129 ○ ○ ○
      U0131 ○ ○ -
      U0142 ○ ○ -
      U0151 ○ ○ -
      Steering Sensor - - - -
      Brake Actuator Assembly U0073 - - -
      U0100 ○ ○ ○
      U0123 ○ ○ ○
      U0126 ○ ○ ○

      Tech Tips


      • ○: Set

      • X: Not set or may be set according to the malfunctioning part when one line of a CAN branch is open.

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

      for RHD
      - Trouble Mode (Open in both CAN main bus lines)
      V Bus
      Output ECU Output DTC

      Combination Meter ECU Communication Stop Mode Click here

      		CAN No. 1 J/C to CAN No. 2 J/C

      ECM Communication Stop Mode Click here

      V Bus Airbag Sensor Assembly - - - -
      Air Conditioning Amplifier Assembly U0100 - - ○
      U0131 - - -
      U0142 - - -
      U0155 ○ ○ -
      Radio and Display Receiver Assembly (for Radio and Display Type) U0073 - - -
      U0100 - - ○
      U0140 - - -
      U0155 ○ ○ -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - - ○
      U0101 - - ○
      U0120 - - -
      U0151 - - -
      U0155 ○ ○ -
      U0164 - - -
      U0327 - ○ -
      Clearance Warning ECU Assembly U0100 - ○ ○
      U0101 - ○ ○
      U0142 - ○ -
      U0155 ○ - -
      ECM - - - -
      Power Steering ECU with Motor Assembly U0100 - - ○
      U0129 ○ ○ ○
      Smart Key ECU Assembly (Certification ECU) U0100 - ○ ○
      U0140 - ○ -
      U0142 - ○ -
      U0155 ○ - -
      Combination Meter Assembly U0100 ○ ○ ○
      U0129 ○ ○ ○
      U0131 ○ ○ -
      U0142 ○ ○ -
      U0151 ○ ○ -
      Steering Sensor - - - -
      Brake Actuator Assembly U0073 - - -
      U0100 - ○ ○
      U0123 - ○ -
      U0126 - - -

      Tech Tips


      • ○: Set

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

      for RHD
      - Trouble Mode (CAN bus line short circuit or short to GND)
      V Bus
      Output ECU Output DTC CAN No. 1 J/C to CAN No. 2 J/C
      V Bus Airbag Sensor Assembly - -
      Air Conditioning Amplifier Assembly U0100 ○
      U0131 ○
      U0142 ○
      U0155 ○
      Radio and Display Receiver Assembly (for Radio and Display Type) U0073 ○
      U0100 ○
      U0140 ○
      U0155 ○
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 ○
      U0101 ○
      U0120 ○
      U0151 ○
      U0155 ○
      U0164 ○
      U0327 ○
      Clearance Warning ECU Assembly U0100 ○
      U0101 ○
      U0142 ○
      U0155 ○
      ECM - -
      Power Steering ECU with Motor Assembly U0100 ○
      U0129 ○
      Smart Key ECU Assembly (Certification ECU) U0100 ○
      U0140 ○
      U0142 ○
      U0155 ○
      Combination Meter Assembly U0100 ○
      U0129 ○
      U0131 ○
      U0142 ○
      U0151 ○
      Steering Sensor - -
      Brake Actuator Assembly U0073 ○
      U0100 ○
      U0123 ○
      U0126 ○

      Tech Tips


      • ○: Set

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

  9. DTC COMBINATION TABLE (OPEN IN CAN BRANCH OF SUB BUS, PAST COMMUNICATION ERROR)


    1. Regarding a past communication error of ECUs and sensors connected to sub bus 1 (in this case, normal is displayed when performing the communication bus check, but communication DTCs are output), determine the part that had a malfunction based on DTCs output from the Main Body ECU (Multiplex Network Body ECU).

      Tech Tips


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

      • DTCs output from ECUs other than the main body ECU (multiplex network body ECU) (gateway function equipped ECU) are shown only as a reference.

      • Regarding a communication stop that is currently occurring in sub bus 1, the malfunctioning part can be confirmed easily by performing the communication bus check using the intelligent tester.

      • If an open occurs in just one of the lines of a CAN branch, DTCs which are not related to malfunctioning parts may be output (DTCs may be displayed randomly), or a message indicating a communication error may be displayed.

      for LHD
      - Trouble Mode (Open in one CAN branch line)
      Sub bus 1
      Output ECU Output DTC

      Multiplex tilt and telescopic ECU Click here

      V Bus Airbag Sensor Assembly - -
      Air Conditioning Amplifier Assembly U0100 -
      U0131 -
      U0142 -
      U0155 -
      AFS ECU U0073 -
      U0100 -
      U0101 -
      U0126 -
      U0129 -
      U0142 -
      V Bus

      • Navigation ECU Sub-Assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 -
      U0100 -
      U0126*2 -
      U0140 -
      U0155 -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 -
      U0101 -
      U0120 -
      U0151 -
      U0155 -
      U0164 -
      U0182 -
      U0327 -
      Clearance Warning ECU Assembly U0100 -
      U0101 -
      U0142 -
      U0155 -
      ECM - -
      Power Steering ECU with Motor Assembly U0100 -
      U0129 -
      Smart Key ECU Assembly (Certification ECU) U0100 -
      U0140 -
      U0142 -
      U0155 -
      Combination meter assembly U0100 -
      U0129 -
      U0131 -
      U0142 -
      U0151 -
      Steering Sensor - -
      Brake Actuator Assembly U0073 -
      U0100 -
      U0123 -
      U0126 -
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 ○
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 ○
      U1115 ○

      Tech Tips


      • ○: Set

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

      • *2: w/ Parking assist monitor system.

      for LHD
      - Trouble Mode (Open in both CAN branch lines)
      Sub bus 1
      Output ECU Output DTC

      Multiplex tilt and telescopic ECU Click here

      V Bus Airbag Sensor Assembly - -
      Air Conditioning Amplifier Assembly U0100 -
      U0131 -
      U0142 -
      U0155 -
      AFS ECU U0073 -
      U0100 -
      U0101 -
      U0126 -
      U0129 -
      U0142 -

      • Navigation ECU Sub-Assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 -
      U0100 -
      U0126*2 -
      U0140 -
      U0155 -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 -
      U0101 -
      U0120 -
      U0151 -
      U0155 -
      U0164 -
      U0182 -
      U0327 -
      Clearance Warning ECU Assembly U0100 -
      U0101 -
      U0142 -
      U0155 -
      ECM - -
      Power Steering ECU with Motor Assembly U0100 -
      U0129 -
      Smart Key ECU Assembly (Certification ECU) U0100 -
      U0140 -
      U0142 -
      U0155 -
      Combination Meter Assembly U0100 -
      U0129 -
      U0131 -
      U0142 -
      U0151 -
      Steering Sensor - -
      V Bus Brake Actuator Assembly U0073 -
      U0100 -
      U0123 -
      U0126 -
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 ○
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 ○
      U1115 ○

      Tech Tips


      • ○: Set

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

      • *2: w/ Parking assist monitor system.

      for LHD
      - Trouble Mode (Open in one CAN main bus line)
      Sub bus 1
      Output ECU Output DTC

      Main Body ECU (Multiplex Network Body ECU) Click here

      		CAN No. 3 J/C to CAN No. 4 J/C CAN No. 5 J/C
      V Bus Airbag Sensor Assembly - - - -
      Air Conditioning Amplifier Assembly U0100 - - -
      U0131 - - -
      U0142 - - -
      U0155 - - -
      AFS ECU U0073 - - -
      U0100 - - -
      U0101 - - -
      U0126 - - -
      U0129 - - -
      U0142 - - -

      • Navigation ECU Sub-Assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 - - -
      U0100 - - -
      U0126*2 - - -
      U0140 - - -
      U0155 - - -
      V Bus Main Body ECU (Multiplex Network Body ECU)*1 U0100 - - -
      U0101 - - -
      U0120 - - -
      U0151 - - -
      U0155 - - -
      U0164 - - -
      U0182 - - -
      U0327 - - -
      Clearance Warning ECU Assembly U0100 - - -
      U0101 - - -
      U0142 - - -
      U0155 - - -
      ECM - - - -
      Power Steering ECU with Motor Assembly U0100 - - -
      U0129 - - -
      Smart Key ECU Assembly (Certification ECU) U0100 - - -
      U0140 - - -
      U0142 - - -
      U0155 - - -
      Combination Meter Assembly U0100 - - -
      U0129 - - -
      U0131 - - -
      U0142 - - -
      U0151 - - -
      Steering Sensor - - - -
      Brake Actuator Assembly U0073 - - -
      U0100 - - -
      U0123 - - -
      U0126 - - -
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 ○ - -
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 ○ ○ ○
      U1115 ○ ○ ○

      Tech Tips


      • ○: Set

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

      • *2: w/ Parking assist monitor system.

      for LHD
      - Trouble Mode (Open in both CAN main bus lines)
      Sub bus 1
      Output ECU Output DTC

      Main Body ECU (Multiplex Network Body ECU) Click here

      		CAN No. 3 J/C to CAN No. 4 J/C CAN No. 5 J/C
      V Bus Airbag Sensor Assembly - - - -
      Air Conditioning Amplifier Assembly U0100 - - -
      U0131 - - -
      U0142 - - -
      U0155 - - -
      AFS ECU U0073 - - -
      U0100 - - -
      U0101 - - -
      U0126 - - -
      U0129 - - -
      U0142 - - -

      • Navigation ECU Sub-Assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 - - -
      U0100 - - -
      U0126*2 - - -
      U0140 - - -
      U0155 - - -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 - - -
      U0101 - - -
      U0120 - - -
      U0151 - - -
      U0155 - - -
      U0164 - - -
      U0182 - - -
      U0327 - - -
      Clearance Warning ECU Assembly U0073 - - -
      U0101 - - -
      U0142 - - -
      U0155 - - -
      ECM - - - -
      Power Steering ECU with Motor Assembly U0100 - - -
      U0129 - - -
      Smart Key ECU Assembly (Certification ECU) U0100 - - -
      U0140 - - -
      U0142 - - -
      U0155 - - -
      Combination Meter Assembly U0100 - - -
      U0129 - - -
      U0131 - - -
      U0142 - - -
      U0151 - - -
      Steering Sensor - - - -
      V Bus Brake Actuator Assembly U0073 - - -
      U0100 - - -
      U0123 - - -
      U0126 - - -
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 ○ - -
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 ○ - -
      U1115 ○ ○ -

      Tech Tips


      • ○: Set

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

      • *2: w/ Parking assist monitor system.

      for LHD
      - Trouble Mode (CAN bus line short circuit or short to GND)
      Sub bus 1
      Output ECU Output DTC CAN No. 3 J/C to CAN No. 4 J/C
      V Bus Airbag Sensor Assembly - -
      Air Conditioning Amplifier Assembly U0100 -
      U0131 -
      U0142 -
      U0155 -
      AFS ECU U0073 -
      U0100 -
      U0101 -
      U0126 -
      U0129 -
      U0142 -

      • Navigation ECU Sub-Assembly (for Navigation Receiver Type)

      • Radio and Display Receiver Assembly (for Radio and Display Type)

      		 U0073 -
      U0100 -
      U0126*2 -
      U0140 -
      U0155 -
      Main Body ECU (Multiplex Network Body ECU)*1 U0100 -
      U0101 -
      U0120 -
      U0151 -
      U0155 -
      U0164 -
      U0182 -
      U0327 -
      V Bus Clearance Warning ECU Assembly U0100 -
      U0101 -
      U0142 -
      U0155 -
      ECM - -
      Power Steering ECU with Motor Assembly U0100 -
      U0129 -
      Smart Key ECU Assembly (Certification ECU) U0100 -
      U0140 -
      U0142 -
      U0155 -
      Combination Meter Assembly U0100 -
      U0129 -
      U0131 -
      U0142 -
      U0151 -
      Steering Sensor - -
      Brake Actuator Assembly U0073 -
      U0100 -
      U0123 -
      U0126 -
      Sub bus 1 Multiplex Tilt and Telescopic ECU U0142 -
      Main Body ECU (Multiplex Network Body ECU)*1 U1002 ○
      U1115 ○

      Tech Tips


      • ○: Set

      • -: DTC is not output.

      • *1: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

      • *2: w/ Parking assist monitor system.

  10. CAN BUS WAVEFORMS

    A01EWQME02

    Tech Tips


    • This waveform is measured between terminals CANH and GND, and terminals CANL and GND of the DLC3. (Use this as a reference for diagnosis of CAN communication lines.)

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

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

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


    1. CAN bus waveforms (Group 1)


      1. A01EVUPE04

        Normal waveform

      2. A01ESW2E02

        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 communication bus check.

      3. A01EYXOE02

        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

      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.)


      1. A01EUEYE03

        Open in a CAN branch line (CANH)

        Tech Tips


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

        • Narrow down the malfunctioning part by checking DTCs or performing a communication bus check, or by checking waveform changes when ECUs or sensors are disconnected (disconnecting connectors from the CAN junction connector enables a quick inspection). The waveform will change to one for an open in both sides of a CAN branch when the ECU or sensor with an open CAN branch line is disconnected.

      2. A01EXKQE02

        Open in a CAN branch line (CANL)

        Tech Tips


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

        • Narrow down the malfunctioning part by checking DTCs or performing a communication bus check, or by checking waveform changes when ECUs or sensors are disconnected (disconnecting connectors from the CAN junction connector enables a quick inspection). The waveform will change to one for an open in both sides of a CAN branch when the ECU or sensor with an open CAN branch line is disconnected.

      3. A01EZ48E02

        Open in a CAN main bus line (CANH)

        Tech Tips


        • Waveforms of ECUs or sensors that are closer to the DLC3 than the open part are almost normal.

        • Waveforms of ECUs or sensors that are on the opposite side of the DLC3 from the open part are abnormal.

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

      4. A01EW0VE02

        Short between a CAN bus line (CANH) and ground

        Tech Tips


        • Narrow down the shorted part by checking for waveform changes when disconnecting connectors from the CAN junction connector 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. A01EY73E02

        Short between a CAN bus line (CANL) and ground

        Tech Tips


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

  11. 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)

      Relevant Data List Item

      [Selected System]
      Accelerator position ECM (1AZ-FE/2AR-FE/2GR-FE) Brake actuator assembly Airbag sensor assembly

      • Accelerator Position (for 2AR-FE) [Engine and ECT]

      • Accelerator Position (for 2GR-FE) [Engine]

      • Accelerator Position (for 1AZ-FE) [Engine and ECT]

      • Accelerator Opening Angle % [ABS/VSC/TRC]
      Engine speed ECM (1AZ-FE/2AR-FE/2GR-FE)

      • Power steering ECU with motor assembly

      • Brake actuator assembly

      • Combination meter assembly

      • Smart key ECU assembly (certification ECU)

      • Airbag sensor assembly

      • Air conditioning amplifier assembly

      • Navigation ECU sub-assembly (for navigation receiver type)

      • Radio and display receiver assembly (for radio and display type)

      • Main body ECU (multiplex network body ECU)

      • Engine Speed (for 2AR-FE) [Engine and ECT]

      • Engine Speed (for 2GR-FE) [Engine]

      • Engine Speed (for 1AZ-FE) [Engine and ECT]

      • Engine Revolution (for 2GR-FE) [EMPS]

      • Engine Revolutions [ABS/VSC/TRC]

      • Engine Rpm [Combination Meter]

      • Engine Speed [Starting Control]
      Engine coolant temperature ECM (1AZ-FE/2AR-FE/2GR-FE)

      • Air conditioning amplifier assembly

      • Combination meter assembly

      		 -

      • Coolant Temp (2AR-FE) [Engine and ECT]

      • Coolant Temp (2GR-FE) [Engine]

      • Coolant Temp (1AZ-FE) [Engine and ECT]

      • Engine Coolant Temp [Air Conditioner]

      • Coolant Temperature [Combination Meter]
      Vehicle speed Brake actuator assembly

      • ECM (1AZ-FE/2AR-FE/2GR-FE)

      • Power steering ECU with motor assembly

      • Combination meter assembly

      		 Airbag sensor assembly

      • Vehicle Speed [ABS/VSC/TRC]

      • Vehicle Speed (for 2GR-FE) [Engine]

      • Vehicle Speed (for 2AR-FE) [Engine and ECT]

      • Vehicle Speed (for 1AZ-FE) [Engine and ECT]

      • Meter Vehicle Velocity [EMPS]

      • Vehicle Speed Meter [Combination Meter]
      Combination meter assembly *3

      • Clearance warning ECU assembly

      • Smart key ECU assembly (certification ECU)

      • Multiplex tilt and telescopic ECU

      • Air conditioning amplifier assembly

      • Main body ECU (multiplex network body ECU)

      • Vehicle Speed Meter [Combination Meter]

      • Vehicle Speed Info [Clearance Sonar]

      • Vehicle Speed Signal [Power Source Control]

      • Freeze Speed Info [Tilt & Telescopic]
      Wheel speed Brake actuator assembly AFS ECU

      • ECM (1AZ-FE/2AR-FE/2GR-FE)

      • Power steering ECU with motor assembly

      • FR Wheel Speed [AFS]

      • FL Wheel Speed [AFS]

      • FR Wheel Speed [ABS/VSC/TRC]

      • FL Wheel Speed [ABS/VSC/TRC]

      • RR Wheel Speed [ABS/VSC/TRC]

      • RL Wheel Speed [ABS/VSC/TRC]
      Shift position ECM (1AZ-FE/2AR-FE/2GR-FE)

      • Clearance warning ECU assembly

      • Navigation ECU sub-assembly (for navigation receiver type)

      • Radio and display receiver assembly (for radio and display type)

      • Smart key ECU assembly (certification ECU)

      • Brake actuator assembly

      • Airbag sensor assembly

      • Combination meter assembly

      • Main body ECU (multiplex network body ECU)

      • AFS ECU

      • Neutral Position SW Signal (for 2AR-FE) [Engine and ECT]

      • Neutral Position SW Signal (for 2GR-FE) [Engine]

      • Neutral Position SW Signal (for 1AZ-FE) [Engine and ECT]

      • Parking Signal [Clearance Sonar]

      • Reverse Signal [Clearance Sonar]

      • Reverse Signal [Navigation System]

      • Shift P Signal [Power Source Control]

      • Shift Lever Position [ABS/VSC/TRC]
      Ambient temperature Air conditioning amplifier assembly

      • ECM (1AZ-FE/2AR-FE/2GR-FE)

      • Combination meter assembly

      • Main body ECU (multiplex network body ECU)

      • Clearance warning ECU assembly

      • Ambient Temp Sensor [Air Conditioner]

      • Ambient Temp for A/C (for 2AR-FE) [Engine and ECT]

      • Ambient Temp for A/C (for 2GR-FE) [Engine]

      • Ambient Temp for A/C (for 1AZ-FE) [Engine and ECT]

      • Ambient Temperature [Combination Meter]
      FR door courtesy switch Main body ECU (multiplex network body ECU) -

      • Smart key ECU assembly (certification ECU)

      • Combination meter assembly *2

      		 FR Door Courtesy [Main Body]
      Steering angle sensor Steering sensor

      • Power steering ECU with motor assembly

      • Brake actuator assembly

      • AFS ECU

      • Airbag sensor assembly

      • Navigation ECU sub-assembly (for navigation receiver type)

      • Radio and display receiver assembly (for radio and display type)

      • Steering Angle Velocity [EMPS]

      • Steering Angle Sensor [ABS/VSC/TRC]

      • Steering Sens Signal [AFS]
      Yaw rate sensor Airbag sensor assembly Brake actuator assembly

      • ECM (1AZ-FE/2AR-FE/2GR-FE)

      • AFS ECU

      		 Yaw Rate Sensor [ABS/VSC/TRC]
      Deceleration sensor Airbag sensor assembly Brake actuator assembly ECM (1AZ-FE/2AR-FE/2GR-FE)

      • Deceleration Sensor [ABS/VSC/TRC]

      • Deceleration Sensor2 [ABS/VSC/TRC]
      Headlight switch Main body ECU (multiplex network body ECU) AFS ECU Combination meter assembly*2

      • Headlight Low Beam State [AFS]

      • Head Light SW (Head) [Main Body]
      Combination meter assembly power source voltage*1 Combination meter assembly - - +B Voltage Value [Combination Meter]
      Power steering ECU with motor assembly power source voltage*1 Power steering ECU with motor assembly - - IG Power Supply [EMPS]
      Solar sensor*1 Air conditioning amplifier assembly - - Solar Sensor (D side) [Air Conditioner]
      Ignition switch condition*1 Smart key ECU assembly (certification ECU) - - Ignition Switch [Entry & Start]
      Clearance sonar main switch*1 Clearance warning ECU assembly - - Main Switch [Clearance Sonar]
      ECM power source voltage*1 ECM (1AZ-FE/2AR-FE/2GR-FE) - -

      • Battery Voltage (for 2AR-FE) [Engine and ECT]

      • Battery Voltage (for 2GR-FE) [Engine]

      • Battery Voltage (for 1AZ-FE) [Engine and ECT]
      AFS off switch condition*1 AFS ECU - - AFS OFF Switch [AFS]
      Tilt up switch condition*1 Multiplex tilt and telescopic ECU - - Tilt Up Switch [Tilt & Telescopic]
      Navigation ECU sub-assembly power source voltage*1 Navigation ECU sub-assembly - - Battery Voltage [Navigation System]
      Radio and display receiver assembly*1 Radio and display receiver assembly - - Battery Voltage [Navigation System]

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

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

      *3: The combination meter assembly receives a vehicle speed signal from the Brake actuator assembly and sends the signal to other ECUs.

    2. Details of relevant Data List items (Selected system: Engine and ECT) (for 1AZ-FE)

      Tech Tips

      Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

      Tech Tips

      Normal Condition: If no conditions are specifically stated for "idling", the shift lever should be in N or P, the A/C switch should be off and all accessory switches should be off.


      1. Warm up the engine.

      2. Turn the A/C switch off.

      3. Turn the ignition switch off.

      4. Connect the intelligent tester to the DLC3.

      5. Turn the ignition switch to ON.

      6. Turn the intelligent tester on.

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

      8. Read the Data List according to the display on the intelligent tester.

        Engine and ECT
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Vehicle Speed

        Vehicle speed/

        Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)

        		 Actual vehicle speed

        • This is the current vehicle speed.

        • The vehicle speed is detected using the wheel speed sensors.


          • Vehicle speed data is delayed when it is displayed. Therefore, even if the vehicle speed listed in the freeze frame data is 0 km/h (0 mph), this does not always mean that the malfunction occurred when the vehicle was stopped.
        Engine Speed

        Engine speed/

        Min.: 0 rpm, Max.: 16383 rpm

        		 610 to 710 rpm: Idling When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.
        Coolant Temp

        Coolant temperature/

        Min.: -40°C (-40°F), Max.: 140°C (284°F)

        		 75 to 100°C (167 to 212°F): After warming up

        This is the engine coolant temperature.

        Tech Tips


        • After warming up the engine, the engine coolant temperature is 75 to 100°C (167 to 212°F).

        • After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature are approximately equal.

        • If the value is -40°C (-40°F) or 140°C (284°F), the sensor circuit is open or shorted.

        • Check if the engine overheats when the value indicates 140°C (284°F).
        Battery Voltage

        Battery voltage/

        Min.: 0 V, Max.: 65.535 V

        		 11 to 14 V: Idling If 11 V or less, characteristics of some electrical components may change.
        Accelerator Position

        Accelerator pedal position/

        Min.: 0%, Max.: 399.9%

        		 Actual accelerator pedal position This is the accelerator pedal position defined using the learned fully released position (sensor output) of accelerator pedal position sensor No. 1 as 0% and the fully depressed position as 100%.
        Neutral Position SW Signal

        Park/Neutral position switch status/

        ON or OFF

        		 ON: Shift lever in P or N -
        Ambient Temp for A/C

        Ambient temperature for A/C/

        Min.: -40°C (-40°F),

        Max.: 215°C (419°F)

        		 - -

    3. Details of relevant Data List items (Selected system: Engine and ECT) (for 2AR-FE)

      Tech Tips

      Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

      Tech Tips

      Normal Condition: If no conditions are specifically stated for "idling", the shift lever should be in N or P, the A/C switch should be off and all accessory switches should be off.


      1. Warm up the engine.

      2. Turn the A/C switch off.

      3. Turn the ignition switch off.

      4. Connect the intelligent tester to the DLC3.

      5. Turn the ignition switch to ON.

      6. Turn the intelligent tester on.

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

      8. Read the Data List according to the display on the intelligent tester.

        Engine and ECT
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Vehicle Speed

        Vehicle speed/

        Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)

        		 Actual vehicle speed

        • This is the current vehicle speed.

        • The vehicle speed is detected using the wheel speed sensors.


          • Vehicle speed data is delayed when it is displayed. Therefore, even if the vehicle speed listed in the freeze frame data is 0 km/h (0 mph), this does not always mean that the malfunction occurred when the vehicle was stopped.
        Engine Speed

        Engine speed/

        Min.: 0 rpm, Max.: 16383 rpm

        		 610 to 710 rpm: Idling When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.
        Coolant Temp

        Coolant temperature/

        Min.: -40°C (-40°F), Max.: 140°C (284°F)

        		 75 to 100°C (167 to 212°F): After warming up

        This is the engine coolant temperature.

        Tech Tips


        • After warming up the engine, the engine coolant temperature is 75 to 100°C (167 to 212°F).

        • After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature are approximately equal.

        • If the value is -40°C (-40°F) or 140°C (284°F), the sensor circuit is open or shorted.

        • Check if the engine overheats when the value indicates 140°C (284°F).
        Battery Voltage

        Battery voltage/

        Min.: 0 V, Max.: 65.535 V

        		 11 to 14 V: Idling If 11 V or less, characteristics of some electrical components may change.
        Accelerator Position

        Accelerator pedal position/

        Min.: 0%, Max.: 399.9%

        		 Actual accelerator pedal position This is the accelerator pedal position defined using the learned fully released position (sensor output) of accelerator pedal position sensor No. 1 as 0% and the fully depressed position as 100%.
        Neutral Position SW Signal

        Park/neutral position switch status/

        ON or OFF

        		 ON: Shift lever in P or N -
        Ambient Temp for A/C

        Ambient temperature for A/C/

        Min.: -40°C (-40°F),

        Max.: 215°C (419°F)

        		 - -

    4. Details of relevant Data List items (Selected system: Engine) (for 2GR-FE)

      Tech Tips

      Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      Note

      The actual values may differ from the values listed in the chart under "Results of real-vehicle check" due to climate, weather conditions, etc.

      Tech Tips

      Normal Condition: If no conditions are specifically stated for "idling", the shift lever should be in N or P, the A/C switch should be off and all accessory switches should be off.


      1. Warm up the engine.

      2. Turn the A/C switch off.

      3. Turn the engine switch off.

      4. Connect the intelligent tester to the DLC3.

      5. Turn the engine switch on (IG).

      6. Turn the intelligent tester on.

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

      8. Read the Data List according to the display on the intelligent tester.

        Engine
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Vehicle Speed

        Vehicle speed/

        Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)

        		 Actual vehicle speed

        • This is the current vehicle speed.

        • The vehicle speed is detected using the wheel speed sensors.


          • Vehicle speed data is delayed when it is displayed. Therefore, even if the vehicle speed listed in the freeze frame data is 0 km/h (0 mph), this does not always mean that the malfunction occurred when the vehicle was stopped.

          • To accurately confirm whether the vehicle was stopped or not, use "SPD (NO)", which is the automatic transaxle output speed.
        Engine Speed

        Engine speed/

        Min.: 0 rpm, Max.: 16383 rpm

        		 600 to 700 rpm: Idling When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.
        Coolant Temp

        Coolant temperature/

        Min.: -40°C (-40°F), Max.: 140°C (284°F)

        		 75 to 100°C (167 to 212°F): After warming up

        This is the engine coolant temperature.

        Tech Tips


        • After warming up the engine, the engine coolant temperature is 75 to 100°C (167 to 212°F).

        • After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature are approximately equal.

        • If the value is -40°C (-40°F) or 140°C (284°F), the sensor circuit is open or shorted.

        • Check if the engine overheats when the value indicates 140°C (284°F).
        Battery Voltage

        Battery voltage/

        Min.: 0 V, Max.: 65.535 V

        		 11 to 14 V: Idling If 11 V or less, characteristics of some electrical components may change.
        Accelerator Position

        Accelerator pedal position/

        Min.: 0%, Max.: 399.9%

        		 Actual accelerator pedal position This is the accelerator pedal position defined using the learned fully released position (sensor output) of accelerator pedal position sensor No. 1 as 0% and the fully depressed position as 100%.
        Neutral Position SW Signal

        Park/neutral position switch/

        ON or OFF

        		 ON: Shift lever in P or N -
        Ambient Temp for A/C

        Ambient temperature for A/C/

        Min.: -40°C (-40°F),

        Max.: 215°C (419°F)

        		 - -

    5. Details of relevant Data List items (Selected system: ABS/VSC/TRC)

      Tech Tips

      Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


      1. Warm up the engine.

      2. Turn the ignition switch off.

      3. Connect the intelligent tester to the DLC3.

      4. Turn the ignition switch to ON.

      5. Turn the intelligent tester on.

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

      7. Read the Data List according to the display on the intelligent tester.

        ABS/VSC/TRC
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Deceleration Sensor

        Acceleration sensor reading / Min.: -18.525 m/s2, Max.: 18.387 m/s2

        		- During deceleration/acceleration: Changes continuously
        Deceleration Sensor2

        Acceleration sensor 2 reading / Min.: -18.525 m/s2, Max.: 18.387 m/s2

        		- During deceleration/acceleration: Changes continuously
        Yaw Rate Sensor Yaw rate sensor / Min.: -128 °/s, Max.: 127 °/s

        Vehicle stopped: 0 °/s

        Turning right: -128 to 0 °/s

        Turning left: 0 to 127 °/s

        		 -
        Steering Angle Sensor Steering angle sensor / Min.: -3276.8°, Max.: 3276.7°

        Turning left: Increase

        Turning right: Decrease

        		 -
        FR Wheel Speed Front wheel speed sensor RH reading / Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
        FL Wheel Speed Front wheel speed sensor LH reading / Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
        RR Wheel Speed Rear wheel speed sensor RH reading / Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
        RL Wheel Speed Rear wheel speed sensor LH reading / Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
        Shift Lever Position Shift lever position information / P,N, R, D/M, 1st-6th/B or Fail Actual shift lever position -
        Vehicle Speed Maximum wheel speed sensor reading / Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
        Engine Revolutions Engine speed / Min.: 0 rpm, Max.: 65535 rpm Engine stopped: 0 rpm When engine speed is constant: No large fluctuations
        Accelerator Opening Angle % Percentage of accelerator pedal opening angle / Min.: 0.0%, Max.: 128.0% When the accelerator pedal is released: 0.0% During accelerator pedal operation: Changes in proportion with the pedal movement

    6. Details of relevant Data List items (Selected system: EMPS)

      Tech Tips

      Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


      1. Turn the ignition switch off.

      2. Connect the intelligent tester to the DLC3.

      3. Turn the ignition switch to ON.

      4. Turn the intelligent tester on.

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

      6. Read the Data List according to the display on the intelligent tester.

        EMPS
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Meter Vehicle Velocity

        Vehicle speed from meter/

        Min.: 0.0 km/h (0.0mph)

        Max.: 300.0 km/h (186.4 mph)

        		 0 km/h (0 mph) Engine running and vehicle stopped
        No significant fluctuation Engine running and vehicle driven at constant speed
        Steering Angle Velocity

        Steering angle speed/

        Min.: -32768 deg/s

        Max.: 32767 deg/s

        Value changes in proportion to steering speed

        - The value increases when turning left and decreases when turning right

        		 Engine running and steering wheel being turned
        IG Power Supply

        IG power source voltage/

        Min.: 0.0000 V

        Max.: 20.1531 V

        		 9 to 16 V Ignition switch ON

    7. Details of relevant Data List items (Selected system: Navigation System)

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

      Tech Tips

      Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.


      1. Connect the intelligent tester to the DLC3.

      2. Turn the ignition switch to ON.

      3. Turn the intelligent tester on.

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

      5. Read the Data List according to the display on the intelligent tester.

        Navigation System
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Battery Voltage Battery voltage/ Min.: 0 V, Max.:24 V 11 to 14 V -
        Reverse Signal Reverse Signal/ON or OFF

        ON: Reverse selected

        OFF: Reverse not selected

        		 -

    8. Details of relevant Data List items (Selected system: Clearance Sonar)

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

      Tech Tips

      Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.


      1. Connect the intelligent tester to the DLC3.

      2. Turn the ignition switch to ON.

      3. Turn the clearance sonar main switch on.

      4. Turn the intelligent tester on.

      5. Enter the following menus: Body / Clearance Sonar / Data List.

      6. Read the Data List according to the display on the intelligent tester.

        Clearance Sonar
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Main Switch Clearance sonar main switch/OFF or ON

        OFF: Clearance sonar main switch off

        ON: Clearance sonar main switch on

        		 -
        Parking Signal Parking signal/OFF or ON

        OFF: Shift lever in any position other than P

        ON: Shift lever in P

        		 -
        Reverse Signal Reverse signal/OFF or ON

        OFF: Shift lever in any position other than R

        ON: Shift lever in R

        		 -
        Vehicle Speed Info Vehicle speed signal/Snr Stop or Snr Work

        Snr Stop: Vehicle speed approximately 13 km/h (8.1 mph) or more (when accelerating) or approximately 9 km/h (5.6 mph) or more (when decelerating)

        Snr Work: Vehicle speed less than approximately 13 km/h (8.1 mph) (when accelerating) or less than approximately 9 km/h (5.6 mph) (when decelerating)

        		 -

    9. Details of relevant Data List items (Selected system: Entry & Start)

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

      Tech Tips


      • Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      • When using the intelligent tester with the ignition switch off to troubleshoot:

        Connect the intelligent tester to the DLC3 and turn a courtesy light switch on and off at 1.5-second intervals until communication between the intelligent tester and vehicle begins.


      1. Connect the intelligent tester to the DLC3.

      2. Turn the engine switch on (IG).

      3. Turn the intelligent tester on.

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

      5. Read the Data List according to the display on the intelligent tester.

        Entry & Start
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Ignition Switch Engine switch ON / ON or OFF

        ON: Engine switch ON

        OFF: Engine switch off

        • Displays whether the IG power source signal input is on or off.

        • Use this Data List item to help determine the cause when all smart entry and start system/wireless functions do not operate.

        • If the electrical key transmitter sub-assembly is brought inside the vehicle and the engine switch is pressed twice without depressing the brake pedal, the engine switch will turn ON. At this time, the key ID code transmitted from the electrical key transmitter sub-assembly and the key ID code stored in the smart key ECU assembly (certification ECU) are compared, and the L code stored in the smart key ECU assembly (certification ECU) and the code stored in the steering lock ECU (steering lock actuator assembly) are compared, and if all codes match, the power source mode is considered ON at that time.*1

        • If the electrical key transmitter sub-assembly is brought inside the vehicle and the engine switch is pressed twice without depressing the brake pedal, the engine switch will turn ON. At this time, the key ID code transmitted from the electrical key transmitter sub-assembly and the key ID code stored in the smart key ECU assembly (certification ECU) are compared, and the S code stored in the smart key ECU assembly (certification ECU) and the code stored in the steering lock ECU (steering lock actuator assembly) are compared, and if all codes match, the power source mode is considered ON at that time.*2

        *1: w/ Wireless Door Lock Buzzer Answer Back Function

        *2: w/o Wireless Door Lock Buzzer Answer Back Function

    10. Details of relevant Data List items (Selected system: Power Source Control)

      Tech Tips

      Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


      1. Connect the intelligent tester to the DLC3.

      2. Turn the ignition switch to ON.

      3. Turn the intelligent tester on.

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

      5. Read the Data List according to the display on the intelligent tester.

        Power Source Control
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Shift P Signal Shift position P/ON or OFF

        ON: Shift lever in P

        OFF: Shift lever not in P

        • Use this item to determine if the shift position switch is malfunctioning.

        • The engine cannot be started when this item is "OFF".
        Vehicle Speed Signal Vehicle being driven or stopped/Stop or Run

        Stop: Vehicle stopped

        Run: Vehicle being driven at 5 km/h (3 mph) or more

        		 -

    11. Details of relevant Data List items (Selected system: Starting Control)

      Tech Tips

      Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


      1. Connect the intelligent tester to the DLC3.

      2. Turn the ignition switch to ON.

      3. Turn the intelligent tester on.

      4. Enter the following menus: Body / Staring Control / Data List.

      5. Read the Data List according to the display on the intelligent tester.

        Starting Control
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Engine Speed Engine speed/0 to 16383 r/min Fluctuates in accordance with engine speed -

    12. Details of relevant Data List items (Selected system: Combination Meter)

      Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


      1. Warm up the engine.

      2. Turn the ignition switch off.

      3. Connect the intelligent tester to the DLC3.

      4. Turn the ignition switch to ON.

      5. Turn the intelligent tester on.

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

      7. Read the Data List according to the display on the intelligent tester.

        Combination Meter
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Vehicle Speed Meter Vehicle speed/Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph) Almost the same as actual vehicle speed -
        Engine Rpm Engine speed/Min.: 0 rpm, Max.: 12750 rpm

        • 600 to 700 rpm: Idling (2GR-FE)

        • 610 to 710 rpm: Idling (2AR-FE)

        		 -
        Coolant Temperature Engine coolant temperature/-40 to 127.5°C (-40 to 261.5°F) After warming up: 75 to 100°C (167 to 212°F)

        Tech Tips


        • After warming up the engine, the engine coolant temperature is 75 to 100°C (167 to 212°F).

        • After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature are approximately equal.

        • If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted.

        • Check if the engine overheats when the value indicates higher than 135°C (275°F).
        +B Voltage Value Battery voltage/Min.: 0 V, Max.: 25.5 V 11 to 14 V -
        Ambient Temperature Outside temperature/Min.: -40°C (-40°F), Max.: 87.5°C (189.5°F) Almost the same as actual outside temperature The temperature displayed on the multi-information display is -40 to 50°C (-40 to 122°F)

    13. Details of relevant Data List items (Selected system: Air Conditioner)

      Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


      1. Connect the intelligent tester to the DLC3.

      2. Turn the ignition switch to ON.

      3. Turn the intelligent tester on.

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

      5. Read the Data List according to the display on the intelligent tester.

        Air Conditioner
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Ambient Temp Sensor

        Ambient temperature sensor (thermistor assembly) /

        Min.: -23.30°C (-9.94°F)

        Max.: 65.95°C (150.71°F)

        		 Actual ambient temperature displayed -
        Solar Sensor (D side)

        Driver side automatic light control sensor (solar sensor) /

        Min.: 0

        Max.: 255

        		 Driver side automatic light control sensor (solar sensor) value increases as brightness increases -
        Engine Coolant Temp

        Engine coolant temperature sensor /

        Min.: 1.30°C (34.34°F)

        Max.: 90.55°C (194.99°F)

        		 Actual engine coolant temperature displayed -

    14. Details of relevant Data List items (Selected system: Main Body ECU) (Multiplex Network Body ECU)

      Tech Tips

      Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


      1. Connect the intelligent tester to the DLC3.

      2. Turn the ignition switch to ON.

      3. Turn the intelligent tester on.

      4. Enter the following menus: Body / Main Body / Data List.

      5. Read the Data List according to the display on the intelligent tester.

        Main Body
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        FR Door Courtesy Front door courtesy light switch RH signal / ON or OFF

        ON: Front door RH closed

        OFF: Front door RH open

        		 -

    15. Details of relevant Data List items (Selected system: Tilt & Telescopic)

      Tech Tips

      Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


      1. Connect the intelligent tester to the DLC3.

      2. Turn the ignition switch to ON.

      3. Turn the intelligent tester on.

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

      5. Read the Data List according to the display on the intelligent tester.

        Tilt & Telescopic
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Freeze Speed Info

        Vehicle speed data/

        Min.: 0 km/h (0 mph)

        Max.: 255 km/h (158 mph)

        		 Stop → Drive → Stop 0 km/h (0 mph) → Same speed as indicated on speedometer → 0 km/h (0 mph)

    16. Details of relevant Data List items (Selected system: AFS)

      Tech Tips

      Using the intelligent tester to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.


      1. Connect the intelligent tester to the DLC3.

      2. Turn the ignition switch to ON.

      3. Turn the intelligent tester on.

      4. Enter the following menus: Body / AFS / Data List.

      5. Read the Data List according to the display on the intelligent tester.

        AFS
        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        Headlight Low Beam State Low beam headlight state/ON or OFF

        ON: Low beam headlights on

        OFF: Low beam headlights off

        		 -
        Steering Sens Signal Steering angle sensor signal value/-384.0 deg to 382.5 deg Approx. 0 deg (When steering wheel is straight) Value changes according to steering wheel position
        FR Wheel Speed Front right wheel speed/0.00 to 327.67 km/h (203.61 mph) Condition can be displayed -
        FL Wheel Speed Front left wheel speed/0.00 to 327.67 km/h (203.61 mph) Condition can be displayed -
        Vehicle Speed Vehicle speed/0.00 to 327.67 km/h (203.61 mph) Condition can be displayed -