AIR CONDITIONING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

VEHICLE BROUGHT TO WORKSHOP

NEXT

INSPECT BATTERY VOLTAGE

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

NEXT

INSPECT ELECTRIC POWER CONTROL SYSTEM*

1. Using the intelligent tester, check the electric power control system's load control history Click here.

   
   

   NEXT

CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

1. Use the intelligent tester to check if the LIN communication system is functioning normally.

   Result

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

   
   

   B

   GO TO LIN COMMUNICATION SYSTEM Click here

   A

CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

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 (for LHD)	B
   CAN DTC is output (for RHD)	C

   
   

   B

   GO TO CAN COMMUNICATION SYSTEM (for LHD Click here)

   C

   GO TO CAN COMMUNICATION SYSTEM (for RHD Click here)

   A

CHECK FOR DTC*

1. Check for DTCs and note any codes that are output.

2. Delete the DTC.

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 DTC CHART Click here

   A

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 9

   A

OVERALL ANALYSIS AND TROUBLESHOOTING*

1. Actuator Check Click here

2. Data List / Active Test Click here

3. Terminals of ECU Click here

4. On-vehicle Inspection

5. Inspection

   
   

   NEXT

ADJUST, REPAIR OR REPLACE

NEXT