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.

    2. Check the fuses and relays.

    3. Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

    4. Using the GTS, check the Data List item "Operation Limitation Control History Count".

      Click here


      Body Electrical > Air Conditioner > Data List
      Tester Display
      Operation Limitation Control History Count (Level1)
      Operation Limitation Control History Count (Level2)

      Tech Tips

      If a value other than zero is displayed for "Operation Limitation Control History Count (Level1)" or "Operation Limitation Control History Count (Level2)", PTC heater operation may have been limited in the past. If the operation is still limited, the message "Operation of Electrical Items Restricted." will be displayed on the multi-information display in the combination meter assembly. In this case, inspect the charging system.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*


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

      Click here

      Result
      Result Proceed to
      CAN communication system DTCs are not output A
      CAN communication system 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.

      Click here


      Body Electrical > Air Conditioner > Trouble Codes

    2. Clear the DTCs.

      Click here


      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.

      Click here


      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 PROBLEM SYMPTOMS TABLE Click here

    A

  6. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Panel diagnosis (indicator check, sensor check).

      Click here

    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