ANTI-LOCK BRAKE SYSTEM, Diagnostic DTC:U0073, U0142

DTC Code DTC Name
U0073 Control Module Communication Bus OFF
U0142 Lost Communication with Main Body ECU

DESCRIPTION

The skid control ECU receives the signals from the ECM via the CAN communication system.

DTC NO. DTC Detection Condition Trouble Area
U0073

When any of the following is detected:


  1. When the IG1 terminal voltage is between 10 and 17.4 V, after the output of data from the skid control ECU is completed, the sending continues for 5 seconds or more.

  2. The condition that bus OFF state occurs once or more within 0.1 seconds occurs 10 times in succession. (Sent signals cannot be received.)

 CAN communication system
U0142 No communication with main body ECU:

  • CAN communication system

  • Main body ECU

CAUTION / NOTICE / HINT

Tech Tips

When DTC indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.

PROCEDURE


  1. CHECK DTC


    1. Clear the DTC Click here.

    2. Start the engine.

    3. Check the DTC Click here.

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

    A

    HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS Click here

    B

    CHECK CAN COMMUNICATION SYSTEM Click here