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. CUSTOMER PROBLEM ANALYSIS

    Tech Tips


    • In troubleshooting, in order to check the problem symptoms accurately and judge correctly, avoid having any preconceptions. 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.

    • Gather as much information as possible for reference. Past malfunctions that seem unrelated may also help in some cases.

    • The following 5 items are important points for problem analysis:

      What Vehicle model, system name
      When Date and time, frequency, whether the problem occurred recently or has been occurring for a long time
      Where Whether the problem occurs at specified place
      Under what conditions? Whether the doors were locked or unlocked, whether the engine switch was on (IG), whether the engine was running
      How did it happen?

      Ask the customer for details about the vehicle operating conditions, environment and malfunction.

      Click here

    Result
    Proceed to
    NEXT

    NEXT

  3. INSPECT BATTERY VOLTAGE


    1. Inspect the battery voltage.

      Standard voltage
      11 to 14 V

      Tech Tips

      A simple method to determine whether the battery is depleted is to operate the horn.

      If the voltage is below 11 V, recharge or replace the 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)", heater operation may have been limited in the past. If the operation is still limited, the message "High Power Consumption Partial Limit On AC/Heater Operation" 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

  4. 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

  5. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*


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

      Click here

      Result
      Result Proceed to
      LIN communication system DTCs are not output A
      LIN communication system DTCs are output B

    B

    GO TO LIN COMMUNICATION SYSTEM Click here

    A

  6. 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

  7. CHECK INTEGRATION CONTROL AND PANEL ASSEMBLY


    1. Operate each switch on the integration control and panel assembly to check that the air conditioning system operates normally.

      Result
      Result Proceed to
      Air conditioning system operates notmally A
      Air conditioning system does not operate notmally B

    B

    ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH CUSTOMER PROBLEM ANALYSIS CHECK Click here

    A

  8. CHECK CHECK BLOWER FUNCTION


    1. Operate the blower switch on the air conditioning control assembly to check that the blower function is controlled normally.

      Result
      Result Proceed to
      Blower function is controlled notmally A
      Blower function is not controlled notmally B

    B

    ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH CUSTOMER PROBLEM ANALYSIS CHECK Click here

    A

  9. CHECK FRESH/RECIRCULATION CONTROL FUNCTION


    1. Operate the blower switch on the integration control and panel assembly to check that the fresh/recirculation control function is controlled normally.

      Result
      Result Proceed to
      Fresh/recirculation control function is controlled normally A
      Fresh/recirculation control function is not controlled normally B

    B

    ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH CUSTOMER PROBLEM ANALYSIS CHECK Click here

    A

  10. CHECK AIR OUTLET CHANGING FUNCTION


    1. Operate the MODE switch on the integration control and panel assembly to check that the air outlet changing function is controlled normally.

      Result
      Result Proceed to
      Air outlet changing function is controlled normally A
      Ar outlet changing function is not controlled normally B

    B

    ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH CUSTOMER PROBLEM ANALYSIS CHECK Click here

    A

  11. CHECK COOL AIR FUNCTION


    1. Operate the A/C switch on the multi-display and temperature adjustment switch on the integration control and panel assembly to check that the cooling performance is controlled normally.

      Result
      Result Proceed to
      Cooling performance is controlled normally A
      Cooling performance is not controlled normally B

    B

    ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH CUSTOMER PROBLEM ANALYSIS CHECK Click here

    A

  12. CHECK HEATER FUNCTION


    1. Operate the A/C switch on the multi-display and temperature adjustment switch on the integration control and panel assembly to check that the heating performance is controlled normally.

      Result
      Result Proceed to
      Heating performance is controlled normally A
      Heating performance is not controlled normally B

    B

    ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH CUSTOMER PROBLEM ANALYSIS CHECK Click here

    A

  13. USE SIMULATION METHOD TO CHECK

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  14. CONFIRMATION TEST

    Result
    Proceed to
    NEXT

    NEXT

    END