WINDOW DEFOGGER SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

Tech Tips


  • Use these procedures to troubleshoot the window defogger 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 LIN COMMUNICATION SYSTEM


    1. Check if the LIN communication system is functioning normally.

      Result
      Result Proceed to
      LIN communication system is normal A
      LIN communication system is not normal B

      B

      GO TO LIN 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. Terminals of ECU Click here.

    2. Data List/Active Test Click here.


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  6. REPAIR OR REPLACE


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  7. CONFIRMATION TEST


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    END