LIGHTING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use these procedures to troubleshoot the lighting system.

  • *: Use the intelligent tester.


  1. VEHICLE BROUGHT TO WORKSHOP


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  2. INSPECT BATTERY VOLTAGE

    Standard voltage
    11 to 14 V

    If the voltage is below 11 V, recharge or replace the battery before proceeding.


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  3. CHECK COMMUNICATION FUNCTION OF COMMUNICATION SYSTEM*


    1. Check for DTCs and make a note of any codes that are output Click here.

    2. Clear the DTCs.

    3. Recheck for DTCs. Based on the DTCs output above, try to cause the output of the same CAN communication system DTC or lighting system DTC by reproducing the symptoms indicated by the DTC.

      Result
      Result Proceed to
      DTC output does not reoccur A
      CAN communication system DTC output reoccurs B

      B

      Go to CAN COMMUNICATION SYSTEM Click here

      A

  4. PROBLEM SYMPTOMS TABLE


    1. 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 6
      A

  5. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Operation Check Click here.

    2. Terminals of ECU Click here.

    3. Data List / Active Test Click here.


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  6. ADJUST, REPAIR OR REPLACE


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  7. CONFIRMATION TEST


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    END