METER / GAUGE SYSTEM, Diagnostic DTC:U0100, U0129

DTC Code DTC Name
U0100 Lost Communication with ECM / PCM "A"
U0129 Lost Communication with Skid Control ECU

DESCRIPTION

The combination meter assembly communicates with the ECM and skid control ECU via the CAN communication system.

DTC No. DTC Detection Condition Trouble Area
U0100

When either of the following conditions is detected:


  1. Vehicle speed is 5 km/h (3.1 mph) or more and IG voltage is 9.5 V or more

  2. No communication with ECM continues for 3 seconds or more (No communication with ECM continues for 60 seconds or more)

  • ECM

  • CAN communication system

  • Combination meter assembly
U0129

When either of the following conditions is detected:


  1. 15 seconds have elapsed since engine started and IG voltage is 9.5 V or more

  2. No communication with skid control ECU continues for 3 seconds or more (No communication with skid control ECU continues for 60 seconds or more)

  • Skid control ECU

  • CAN communication system

  • Combination meter assembly

INSPECTION PROCEDURE

PROCEDURE


  1. CONFIRM DTC OUTPUT


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Trouble Codes.

    5. Clear the stored DTCs.

    6. Drive the vehicle at more than 5 km/h (3.1 mph) for at least 60 seconds.

    7. Stop the vehicle.

    8. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC is output. A
      DTC is not output. B

      Tech Tips

      If CAN communication system DTC U0100 or U0129 and another DTC are output at the same time, perform troubleshooting for CAN communication system DTC U0100 or U0129 first.


    B

    USE SIMULATION METHOD TO CHECK Click here

    A

    GO TO CAN COMMUNICATION SYSTEM Click here