AIR CONDITIONING SYSTEM (for Manual Air Conditioning System) HOW TO PROCEED WITH TROUBLESHOOTING

VEHICLE BROUGHT TO WORKSHOP

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INSPECT BATTERY VOLTAGE

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

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CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

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

   
   

   • for LHD: Click here.

   • for RHD: Click here.

   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 Click here

   C

   GO TO CAN COMMUNICATION SYSTEM Click here

   A

CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

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

   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 FOR DTC*

1. Check for DTCs Click here.

2. Clear the DTCs Click here.

3. Based on the DTCs output above, try to force output of the air conditioning system DTC by simulating the conditions indicated by the DTC. Then recheck for DTCs.

   Result

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

   
   

   B

   GO TO DIAGNOSTIC TROUBLE CODE 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

   ADJUST, REPAIR OR REPLACE IN ACCORDANCE WITH PROBLEM SYMPTOMS TABLE

   A

OVERALL ANALYSIS AND TROUBLESHOOTING*

1. Terminals of ECU Click here

2. Data List/Active Test Click here

3. On-vehicle Inspection

4. Inspection

   
   

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ADJUST, REPAIR OR REPLACE

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CONFIRMATION TEST

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