AIR CONDITIONING SYSTEM(for Manual 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, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. 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 problems 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, time, occurrence frequency
      Where Road conditions
      Under what conditions? Driving conditions, weather conditions
      How did it happen? Problem symptoms
    Result
    Proceed to
    NEXT

    NEXT

  3. INSPECT BATTERY VOLTAGE


    1. Inspect the battery voltage.

      Standard Voltage
      11 to 14 V

      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.

      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 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

  6. CHECK AIR CONDITIONING CONTROL ASSEMBLY


    1. Operate each switch on the air conditioning control assembly and check that the switches of the air conditioning system operate normally.

      Result
      Proceed to
      OK
      NG

    NG

    GO TO PROBLEM SYMPTOMS TABLE Click here

    OK

  7. CHECK BLOWER CONTROL


    1. Operate the blower switch on the air conditioning control assembly and check that the blower control operates normally.

      Result
      Proceed to
      OK
      NG

    NG

    GO TO PROBLEM SYMPTOMS TABLE Click here

    OK

  8. CHECK AIR INLET CONTROL


    1. Operate the recirculation/fresh switch on the air conditioning control assembly and check that the air inlet control operates normally.

      Result
      Proceed to
      OK
      NG

    NG

    GO TO PROBLEM SYMPTOMS TABLE Click here

    OK

  9. CHECK AIR OUTLET CONTROL


    1. Operate the air outlet mode switch on the air conditioning control assembly and check that the air outlet control operates normally.

      Result
      Proceed to
      OK
      NG

    NG

    GO TO PROBLEM SYMPTOMS TABLE Click here

    OK

  10. CHECK COOLING FUNCTION


    1. Operate the temperature adjustment switches on the air conditioning control assembly and check that cool air is blown from the registers.

      Result
      Proceed to
      OK
      NG

    NG

    GO TO PROBLEM SYMPTOMS TABLE Click here

    OK

  11. CHECK HEATER FUNCTION


    1. Operate the temperature adjustment switches on the air conditioning control assembly and check that warm air is blown from the registers.

      Result
      Proceed to
      OK
      NG

    NG

    GO TO PROBLEM SYMPTOMS TABLE Click here

    OK

  12. USE SIMULATION METHOD TO CHECK

    Click here

    Result
    Proceed to
    NEXT

    NEXT

  13. CONFIRMATION TEST

    Result
    Proceed to
    NEXT

    NEXT

    END