METER / GAUGE SYSTEM, Diagnostic DTC:U0129

DTC Code DTC Name
U0129 Lost Communication with Brake System Control Module

DESCRIPTION

The No. 1 meter ECU communicates with the skid control ECU via the CAN line.

DTC Code DTC Detection Condition Trouble Area
U0129

When either of following conditions is detected:


  • 15 seconds have elapsed since engine started and IG voltage 10.5 V or more

  • No communication with skid control ECU continues for 3 seconds or more (No communication with ECM or skid control ECU continues for 60 seconds or more)

 CAN communication system

WIRING DIAGRAM

A01GJ3FE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check for DTCs and note any codes that are output Click here.

    2. Clear the DTC Click here.

    3. Recheck for DTC Click here.

      Result:
      Result Proceed to
      CAN communication system DTC is not output A
      CAN communication system (for LHD) DTC is output B
      CAN communication system (for RHD) DTC is output C

      Tech Tips

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


    B

    Go to CAN COMMUNICATION SYSTEM Click here

    C

    Go to CAN COMMUNICATION SYSTEM Click here

    A

    USE SIMULATION METHOD TO CHECK Click here