Air Conditioning System (for Automatic Air Conditioning System)

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

HINT
* Use these procedures to troubleshoot the air conditioning system.
* *: Use the Techstream.
1. VEHICLE BROUGHT TO WORKSHOP

NEXT -- Continue to next step.

2. INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

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

NEXT -- Continue to next step.

3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Use the Techstream to check if the CAN communication system is functioning normally.





B -- GO TO CAN COMMUNICATION SYSTEM Service Precautions
A -- Continue to next step.

4. CHECK FOR DTC*

(a) Check for DTCs and note any codes that are output DTC Check / Clear.

(b) Clear the DTC DTC Check / Clear.

(c) 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.





B -- GO TO STEP 7
A -- Continue to next step.

5. PROBLEM SYMPTOMS TABLE

(a) Refer to the problem symptoms table Air Conditioning System (For Automatic Air Conditioning System).





B -- GO TO STEP 7
A -- Continue to next step.

6. OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) Actuator Check Actuator Check

(b) DATA LIST / ACTIVE TEST Air Conditioning System (for Automatic Air Conditioning System)

(c) Terminals of ECU Air Conditioning System (for Automatic Air Conditioning System)

(d) On-vehicle Inspection

(e) Inspection

NEXT -- Continue to next step.

7. ADJUST, REPAIR OR REPLACE

NEXT -- END