Window Defogger System (For Automatic Air Conditioning System) How To Proceed With Troubleshooting

Vehicle Exterior. Corolla. Zre142 Aze141
Window Glass. Corolla. Zre142 Aze141

  1. VEHICLE BROUGHT TO WORKSHOP

  2. CUSTOMER PROBLEM ANALYSIS

  3. INSPECT BATTERY VOLTAGE

  4. PROBLEM SYMPTOMS TABLE

  5. OVERALL ANALYSIS AND TROUBLESHOOTING

  6. REPAIR OR REPLACE

  7. CONFIRMATION TEST

Window Defogger System (For Automatic Air Conditioning System) -- How To Proceed With Troubleshooting


HINT:
  1. Use the following procedure to troubleshoot the defogger system.
  2. The Techstream should be used in step 5.


1.VEHICLE BROUGHT TO WORKSHOP

    NEXT


    2.CUSTOMER PROBLEM ANALYSIS

      HINT:
      1. In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
      2. Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
      3. The following 5 items are important points in the problem analysis:

      What
      		Vehicle model, system name
      When
      		Date, time, occurrence frequency
      Where
      		Road conditions
      Under what conditions?
      		Driving conditions, weather conditions
      How did it happen?
      		Problem symptoms

    NEXT


    3.INSPECT BATTERY VOLTAGE

    1. Measure the battery voltage.

      Standard Voltage:
      11 to 14 V
      If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

    NEXT


    4.PROBLEM SYMPTOMS TABLE
      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 (COROLLA_ZRE142 RM000000WPS09EX.html)

    2. Data List / Active Test (COROLLA_ZRE142 RM000000WPV05RX.html)

    3. On-vehicle Inspection (COROLLA_ZRE142 RM000000U8V067X.html)


    NEXT


    6.REPAIR OR REPLACE

      NEXT


      7.CONFIRMATION TEST

        NEXT

        END