CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM, Diagnostic DTC:U0129

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

DESCRIPTION

The ECM receives signals sent from the skid control ECU via CAN communication. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding ECU or sensor.

DTC Code

DTC Detection Condition

  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

Trouble Area

U0129

  1. The ignition switch is ON.

  2. There is no communication between the ECM and skid control ECU.

  3. 2.22 seconds

  4. 1-trip detection logic

  • CAN communication system

  • Brake actuator assembly (Skid control ECU)

  • ECM

PROCEDURE

  1. CLEAR DTC AND PERFORM ROAD TEST

    1. Clear the DTCs (Click here).

      Tip:

      Write down the currently output DTCs before clearing them.

    2. Start the engine and drive the vehicle at a low speed.

  2. CHECK DTC OUTPUT (DTC U0129)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

    5. Read the DTCs using the GTS.

      Table 1. Result

      Result

      Proceed to

      DTC U0129 is not output

      A

      DTC U0129 is output

      B

    CHECK FOR INTERMITTENT PROBLEMS

    (Click here)

    GO TO CAN COMMUNICATION SYSTEM

    (Click here)