How To Proceed With Troubleshooting

AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual 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. CUSTOMER PROBLEM ANALYSIS AND SYMPTOM CHECK

NEXT -- Continue to next step.

3. 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.

4. CHECK CAN COMMUNICATION SYSTEM*

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

Result:





B -- Go to CAN COMMUNICATION SYSTEM
A -- Continue to next step.

5. CHECK DTC*

(a) Check for DTCs and write down any DTCs that are output.

(b) Clear the DTCs.

(c) Recheck for DTCs. Based on the DTCs output above, try to cause output of the air conditioning system DTC by simulating the operation indicated by the DTC.

Result:





B -- Go to step 8
A -- Continue to next step.

6. REFER TO PROBLEM SYMPTOMS TABLE

Result:





B -- Go to step 8
A -- Continue to next step.

7. OVERALL ANALYSIS AND TROUBLESHOOTING*

(a) DATA LIST / ACTIVE TEST Air Conditioning System (for Manual Air Conditioning System)

(b) Terminals of ECU Air Conditioning System (for Manual Air Conditioning System)

NEXT -- Continue to next step.

8. ADJUST, REPAIR OR REPLACE

NEXT -- Continue to next step.

9. CONFIRMATION TEST

NEXT -- END