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AIR CONDITIONING SYSTEM (for Automatic Air Conditioning System) HOW TO PROCEED WITH TROUBLESHOOTING

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Click here
Tip:

  • Use the following procedure to troubleshoot the air conditioning system.

  • *: Use the intelligent tester.


  1. Click here

    VEHICLE BROUGHT TO WORKSHOP


    • NEXT
  2. Click here

    CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK


    • NEXT
  3. Click here

    INSPECT BATTERY VOLTAGE

    Standard voltage
    11 to 14 V

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


    • NEXT
  4. Click here

    CHECK CAN COMMUNICATION SYSTEM*


    1. Use the intelligent tester to check if the CAN communication system is functioning.

      Result
      Result Proceed to
      CAN DTC is not output A
      CAN DTC is output

      B

      (Click here)

      • B
      • GO TO CAN COMMUNICATION SYSTEM
      • A
  5. Click here

    CHECK FOR DTC


    1. Check for DTCs.


      1. Write down the DTCs.

    2. Clear the DTCs.

    3. Check whether the DTCs recur.


      1. Reproduce the problem symptoms in accordance with the DTCs that were written down, and check whether the DTCs recur.

        Tip:

        Refer to the DTC chart when any DTCs are output.

        Result
        Result Proceed to
        DTC is not output A
        DTC is output B

      • B
      • Go to step 8
      • A
  6. Click here

    REFER TO PROBLEM SYMPTOMS TABLE

    Result
    Result Proceed to
    Fault not listed in problem symptoms table A
    Fault listed in problem symptoms table B

    • B
    • Go to step 8
    • A
  7. Click here

    OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. DATA LIST / ACTIVE TEST (Click here)

    2. Panel diagnosis (indicator check) (Click here)

    3. Panel diagnosis (sensor check) (Click here)

    4. Panel diagnosis (actuator check) (Click here)

    5. Terminals of ECU (Click here)


      • NEXT
  8. Click here

    ADJUST, REPAIR OR REPLACE


    • NEXT
  9. Click here

    CONFIRMATION TEST


    • NEXT
    • END