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 procedures to troubleshoot the air conditioning system.

  • *: Use the intelligent tester.

PROCEDURE


  1. VEHICLE BROUGHT TO WORKSHOP

    Result
    Proceed to
    NEXT

    NEXT

  2. 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.

      Result
      Proceed to
      NEXT

    NEXT

  3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*


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

      Result
      Result Proceed to
      CAN DTC is not output A
      CAN DTC is output (w/ Toyota Safety Sense) B
      CAN DTC is output (w/o Toyota Safety Sense) C

    B

    GO TO CAN COMMUNICATION SYSTEM (w/Toyota Safety Sense) Click here

    C

    CAN COMMUNICATION SYSTEM (w/o Toyota Safety Sense) Click here

    A

  4. CHECK FOR DTC*


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

      Click here

    2. Clear the DTCs.

    3. Recheck for DTCs. Based on the DTCs output above, try to force output of the A/C system DTC by simulating the operation indicated by the DTC.

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

    B

    GO TO STEP 7 Click here

    A

  5. PROBLEM SYMPTOMS TABLE


    1. Refer to the 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 STEP 7 Click here

    A

  6. OVERALL ANALYSIS AND TROUBLESHOOTING*


    1. Panel diagnosis (refrigerant shortage check)*1

      Click here


      • *1: w/ Cooler

    2. Data List / Active Test

      Click here

    3. Terminals of ECU

      Click here

    4. On-Vehicle Inspection

    5. Inspection

    6. Check for DTCs after checking harness and connector.

      Click here

      Result
      Proceed to
      NEXT

    NEXT

  7. ADJUST, REPAIR OR REPLACE

    Result
    Proceed to
    NEXT

    NEXT

    END