AIR CONDITIONING SYSTEM (for Manual Air Conditioning System) > HOW TO PROCEED WITH TROUBLESHOOTING

for Preparation Click here


HINT:
  1. Use these procedures to troubleshoot the air conditioning system.
  2. *: Use the intelligent tester.



1.VEHICLE BROUGHT TO WORKSHOP

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    2.CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK

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      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.


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      4.CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

      1. Use an 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
        		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).

        HINT:
        Refer to the DTC Check/Clear (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 8
      A


      6.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 8
      A


      7.OVERALL ANALYSIS AND TROUBLESHOOTING*

      1. Data List/Active Test (Click here)

      2. Terminals of ECU (Click here)

      3. On-vehicle Inspection

      4. Inspection


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      8.ADJUST, REPAIR OR REPLACE

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        END