AIR CONDITIONING SYSTEM (for Automatic 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.
   

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Standard voltage:

11 to 14 V


If the voltage is below 11 V, recharge or replace the battery before proceeding.

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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	B

B.	Go to CAN COMMUNICATION SYSTEM (Click here)
A

1. Check for DTCs or sensor check codes.
   

   1. Write down the DTCs or sensor check codes.
      

2. Clear the DTCs or sensor check codes.
   

3. Check whether the DTCs or sensor check codes recur.
   

   1. Reproduce the problem symptoms in accordance with the DTCs or sensor check codes that were written down, and check whether the DTCs or sensor check codes recur.
      

      HINT:

      Refer to the DTC chart when any DTCs or sensor check codes are output.

      Result 

      Result	Proceed to
      DTC or sensor check code is not output	A
      DTC or sensor check code is output	B

B.	Go to step 8
A

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

1. Data List / Active Test (Click here)
   

2. Diagnosis system (Click here)
   

   1. Panel diagnosis (indicator check)
      

   2. Panel diagnosis (actuator check)
      

3. Terminals of ECU (Click here)
   

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