MULTIPLEX COMMUNICATION SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use this procedure to troubleshoot the multiplex communication system.

  • *: Use the intelligent tester.


  1. VEHICLE BROUGHT TO WORKSHOP


    NEXT

  2. CHECK FOR DTC*


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

    2. Clear the DTC.

    3. Recheck for DTCs. Try to prompt the DTC by simulating the original activity that the DTC suggests.

      Result
      Result Proceed to
      DTC does not reoccur A
      DTC reoccurs B

      B

      GO TO DTC CHART Click here.
      A

  3. OVERALL ANALYSIS AND TROUBLESHOOTING


    1. Terminals of ECU Click here.


      NEXT

  4. REPAIR OR REPLACE


    NEXT

  5. CONFIRMATION TEST


    NEXT
    END