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 BATTERY VOLTAGE


    1. Inspect the battery voltage with the engine switch off.

      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 "Operation Limitation Control History Count (Level 1)" and "Operation Limitation Control History Count (Level 2)".

      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 (w/ PTC Heater), seat heater system (w/ Seat Heater System) and climate control seat system (w/ Climate Control Seat System) 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.

      for 8AR-FTS:

      Click here

      for 3ZR-FAE:

      Click here

    3. Clear the "Operation Limitation Control History Count (Level 1)" and "Operation Limitation Control History Count (Level 2)".


      Body Electrical > Air Conditioner > Utility
      Tester Display
      A/C Operation Limitation History Count Clear
      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*


    1. Use the GTS to check if the LIN communication system is functioning normally.

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

    B

    GO TO LIN COMMUNICATION SYSTEM Click here

    A

  4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*


    1. Use the GTS to check if the CAN communication system is functioning normally.

      Result
      Result Proceed to
      CAN DTC is not output A
      CAN DTC is 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.

      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
      DTC is not output A
      DTC is output B

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    A

  6. 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

    ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE

    A

  7. 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

  8. ADJUST, REPAIR OR REPLACE

    Result
    Proceed to
    NEXT

    NEXT

    END