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

DTC Code DTC Name
HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

Tech Tips


  • Use these procedures to troubleshoot the air conditioning system.

  • *: Use the intelligent tester.

PROCEDURE


  1. VEHICLE BROUGHT TO WORKSHOP

    Result
    Proceed to
    NEXT

    NEXT

  2. CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK

    Result
    Proceed to
    NEXT

    NEXT

  3. INSPECT BATTERY VOLTAGE

    Standard voltage
    11 to 14 V

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

    Result
    Proceed to
    NEXT

    NEXT

  4. CHECK LIN COMMUNICATION SYSTEM*


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

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

    B

    GO TO LIN COMMUNICATION SYSTEM Click here

    A

  5. 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

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  6. CHECK DTCs OR CHECK SENSOR CHECK CODES THROUGH PANEL DIAGNOSIS


    1. Check DTCs or sensor check codes.


      1. Write down the DTCs or sensor check codes.

    2. Clear the DTCs or sensor check codes.

    3. Check whether the DTCs or sensor check codes recur.


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

        Tech Tips

        Refer to the DTC chart when any DTCs or sensor check codes are output.

      Result
      Result Proceed to
      DTC or sensor check code is not output A
      DTC or sensor check code is output B

    B

    GO TO STEP 9 Click here

    A

  7. REFER TO PROBLEM SYMPTOMS TABLE


    1. Problem Symptoms Table.

      Click here

      Result
      Result Proceed to
      Fault not listed in Problem Symptoms Table A
      Fault listed in Problem Symptoms Table B

    B

    GO TO STEP 9 Click here

    A

  8. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Data List/Active Test

      Click here

    2. Diagnosis system

      Click here


      1. Panel diagnosis (indicator check)

      2. Panel diagnosis (actuator check)

    3. Panel diagnosis (refrigerant shortage check)

      Click here

    4. Terminals of ECU

      Click here

    5. Check for DTCs after checking harness and connector

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  9. ADJUST, REPAIR OR REPLACE

    Result
    Proceed to
    NEXT

    NEXT

  10. CONFIRMATION TEST

    Result
    Proceed to
    NEXT

    NEXT

    END