How To Proceed With Troubleshooting

HINT:

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

1. VEHICLE BROUGHT TO WORKSHOP 
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.

3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Use a Techstream to check if the CAN Communication System is functioning normally.

      Result 

      RESULT REFERENCE
      
      

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

   B: Go to CAN COMMUNICATION SYSTEM  (See PROBLEM SYMPTOMS TABLE )

   A: Go to next step 

4. CHECK FOR DTC* 
   1. Check for DTCs and note any codes that are output.

      HINT:

      Refer to the DTC CHECK / CLEAR  .

   2. Delete 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 REFERENCE
      
      

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

   B:  Go to step  7

   A: Go to next step 

5. PROBLEM SYMPTOMS TABLE 
   1. Refer to the 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  7

   A: Go to next step 

6. OVERALL ANALYSIS AND TROUBLESHOOTING* 
   1. DATA LIST / ACTIVE TEST (See DIAGNOSIS SYSTEM  )
   2. TERMINALS OF ECU (See TERMINALS OF ECU  )
   3. ON-VEHICLE INSPECTION
   4. INSPECTION
7. ADJUST, REPAIR OR REPLACE 

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