PRE-CRASH SAFETY SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use the following procedure to troubleshoot the pre-crash safety system.

  • The intelligent tester should be used in steps 2, 3, 4 and 6.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. CHECK MULTIPLEX COMMUNICATION SYSTEM


    1. Use the intelligent tester to check if the multiplex communication system (MPX) is functioning normally.

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

      B

      GO TO MULTIPLEX COMMUNICATION SYSTEM Click here

      A

  3. CHECK CAN COMMUNICATION SYSTEM


    1. Use the intelligent tester to check if the CAN communication system is functioning normally.

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

      B

      GO TO CAN COMMUNICATION SYSTEM Click here

      A

  4. CHECK FOR DTC


    1. Check for DTCs.


      1. Record the DTCs.

    2. Clear the DTCs.

    3. Recheck for DTCs.


      1. Attempt to duplicate the malfunction and check if the DTCs are output again Click here.

        Result
        DTC Condition Proceed to
        DTC is not output A
        DTC is output B
        No DTC is output, and malfunction cannot be duplicated or checked C

      B

      GO TO DTC CHART Click here

      C

      GO TO SYMPTOM SIMULATION Click here

      A

  5. PROBLEM SYMPTOMS TABLE

    Refer to Problem Symptoms Table Click here.

    Result
    Result Proceed to
    Fault is not listed in problem symptoms table A
    Fault is listed in problem symptoms table B

    B

    Go to step 7
    A

  6. OVERALL ANALYSIS AND TROUBLESHOOTING


    1. Data List / Active Test Click here

    2. Terminals of ECU Click here


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  7. ADJUST, REPAIR OR REPLACE


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  8. CONFIRMATION TEST


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    END