AIR CONDITIONING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

DTC Code DTC Name
HOW TO PROCEED WITH TROUBLESHOOTING

CAUTION / NOTICE / HINT

Tech Tips


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

  • *: Use the GTS.

PROCEDURE


  1. VEHICLE BROUGHT TO WORKSHOP

    Result
    Proceed to
    NEXT

    NEXT

  2. INSPECT AUXILIARY BATTERY VOLTAGE


    1. Inspect the auxiliary battery voltage with the power switch off.

      Standard Voltage
      11 to 14 V

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

      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*


    1. Using the GTS, check for CAN communication system DTCs.

      Result
      Result Proceed to
      CAN DTCs are not output A
      CAN DTCs are output B

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  4. CHECK FOR DTC*


    1. Check for DTCs and note any codes that are output.


      Body Electrical > Air Conditioner > Trouble Codes

    2. Clear the DTCs.


      Body Electrical > Air Conditioner > Clear DTCs

    3. Recheck for DTCs. Based on the DTCs output above, try to force output of the air conditioning system DTC by simulating the operation indicated by the DTC.


      Body Electrical > Air Conditioner > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      DTCs are output B

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  5. 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 7 Click here

    A

  6. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Panel diagnosis (indicator check, sensor check)

    2. Data List / Active Test.

      Click here

    3. Terminals of ECU.

      Click here

    4. On-vehicle Inspection

    5. Inspection

      Result
      Proceed to
      NEXT

    NEXT

  7. ADJUST , REPAIR OR REPLACE

    Result
    Proceed to
    NEXT

    NEXT

    END