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


    1. Measure the voltage of the battery.

      Standard voltage
      11 to 14 V

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

    2. Using the intelligent tester, inspect battery voltage reduction history "Battery Voltage Lo Record" in the Data List Click here.


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  3. CHECK LIN COMMUNICATION SYSTEM*


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

      OK
      LIN DTC is not output.

      NG

      Go to LIN COMMUNICATION SYSTEM Click here

      OK

  4. PROBLEM SYMPTOMS TABLE


    1. Refer to the 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