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 AND SYMPTOM CHECK

    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.

      Result
      Proceed to
      NEXT

    NEXT
  4. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*


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

      Result
      Result Proceed to
      CAN DTC is not output A
      CAN DTC is output (except 5L) B
      CAN DTC is output (for 5L) C

    B
    C
    A
  5. CHECK FOR DTC*


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

      Click here

    2. Clear the DTCs.

      Click here

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

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

    B
    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
    A
  7. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Terminals of ECU

      Click here

    2. Data List / Active Test

      Click here

    3. On-vehicle Inspection

    4. Inspection

      Result
      Proceed to
      NEXT

    NEXT
  8. ADJUST, REPAIR OR REPLACE

    Result
    Proceed to
    NEXT

    NEXT
  9. CONFIRMATION TEST

    Result
    Proceed to
    NEXT