Multiplex Communication System How To Proceed With Troubleshooting

Communication System. Lexus Is250, Is220D. Gse20 Ale20
Multiplex Communication. Lexus Is250, Is220D. Gse20 Ale20

  1. VEHICLE BROUGHT TO WORKSHOP

  2. CHECK FOR DTC

  3. OVERALL ANALYSIS AND TROUBLESHOOTING

  4. ADJUST, REPAIR OR REPLACE

  5. CONFIRMATION TEST

Multiplex Communication System -- How To Proceed With Troubleshooting


HINT:
  1. Use this procedure to troubleshoot the multiplex communication system.
  2. The intelligent tester should be used in step 2.


1.VEHICLE BROUGHT TO WORKSHOP

    NEXT


    2.CHECK FOR DTC

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

    2. Delete 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
    A


    3.OVERALL ANALYSIS AND TROUBLESHOOTING

    1. Terminals of ECU (Click here).


    NEXT


    4.ADJUST, REPAIR OR REPLACE

      NEXT


      5.CONFIRMATION TEST

        NEXT

        END