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DTC U0100: Lost Communication with ECM; DTC U0129: Lost Communication with Brake System Control Module: Procedure

  1. RECONFIRM DTC 
    1. Clear the DTCs. Refer to DTC CHECK / CLEAR .
    2. Check for DTCs.

      OK

      DTC U0100 or U0129 is not output.

    NG → See step   3 

    OK → See step   2 

  2. CHECK FOR INTERMITTENT PROBLEMS. Refer to  ELECTRONIC CIRCUIT INSPECTION PROCEDURE 
  3. GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING