How To Proceed With Troubleshooting

HINT:

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

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 11 to 14 V 

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

3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
   1. Use the 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 HOW TO PROCEED WITH TROUBLESHOOTING )

   A: Go to Next Step 

4. CHECK FOR DTC* 
   1. Check for DTCs and note any codes that are output (See DTC CHECK / CLEAR  ).
   2. Clear the DTC (See DTC CHECK / CLEAR  ).
   3. Recheck for DTCs. Based on the DTCs output above, try to force output of the air conditioning 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 (See 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. Actuator Check (See CHECK MODE PROCEDURE  )
   2. Data List/Active Test (See DATA LIST / ACTIVE TEST  )
   3. Terminals of ECU (See TERMINALS OF ECU  )
   4. On-vehicle Inspection
   5. Inspection
7. ADJUST, REPAIR OR REPLACE 

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