AIR CONDITIONING SYSTEM HOW TO PROCEED WITH TROUBLESHOOTING

VEHICLE BROUGHT TO WORKSHOP

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INSPECT AUXILIARY BATTERY VOLTAGE

1. Inspect the auxiliary battery voltage.

   Standard voltage
   11 to 14 V

   If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.

2. Using the GTS, inspect auxiliary battery voltage reduction history "Battery Control Count (Body ECU)" in the Data List Click here.

   
   

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CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

1. Use the GTS 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 FOR DTC*

1. Check for DTCs and note any code that is output Click here.

2. Clear the DTCs Click here.

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

   Result

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

   
   

   B

   GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

   A

PROBLEM SYMPTOMS TABLE

1. Refer to 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. Panel diagnosis (indicator check, sensor check) Click here

2. Data List / Active Test Click here

3. Terminals of ECU Click here

4. On-vehicle Inspection

5. Inspection

   
   

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ADJUST, REPAIR OR REPLACE

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