How To Proceed With Troubleshooting

HINT:

• Use these procedures to troubleshoot the air conditioning system.
• *: Use Techstream.

1. VEHICLE BROUGHT TO WORKSHOP 
2. CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK 
3. INSPECT BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

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

4. CHECK CAN COMMUNICATION SYSTEM* 
   1. Use Techstream to check if the CAN communication system is functioning.

      Result 

      RESULT REFERENCE
      
      

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

   B: Go to CAN COMMUNICATION SYSTEM

   A: Go to next step 

5. CHECK DTC OR CHECK SENSOR CHECK CODE THROUGH PANEL DIAGNOSIS* 
   1. Check 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 REFERENCE
         
         

         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: Go to next step 

6. REFER TO PROBLEM SYMPTOMS TABLE 

   Result 

   RESULT REFERENCE
   
   

   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: Go to next step 

7. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. DATA LIST / ACTIVE TEST (see DATA LIST / ACTIVE TEST  )
   2. Panel diagnosis (indicator check) (see CHECK MODE PROCEDURE  )
   3. Panel diagnosis (sensor check) (see CHECK MODE PROCEDURE  )
   4. Panel diagnosis (actuator check) (see CHECK MODE PROCEDURE  )
   5. Terminals of ECU (see TERMINALS OF ECU  )
8. ADJUST, REPAIR OR REPLACE 
9. CONFIRMATION TEST 

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