How to Proceed with Troubleshooting

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

HINT
* Use the following procedure to troubleshoot the air conditioning system.
* *: Use 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 Techstream to check if the CAN communication system is functioning.

Result:





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

5. CHECK FOR DTC

(a) Check for DTCs.

(1) Write down the DTCs.

(b) Clear the DTCs.

(c) Check whether the DTCs recur.

(1) Reproduce the problem symptoms in accordance with the DTCs that were written down, and check whether the DTCs recur.

HINT
Refer to the DTC chart when any DTCs are output.

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 Automatic Air Conditioning System)

(b) Panel diagnosis (indicator check) Check Mode Procedure

(c) Panel diagnosis (sensor check) Check Mode Procedure

(d) Panel diagnosis (actuator check) Check Mode Procedure

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

NEXT -- Continue to next step.

8. ADJUST, REPAIR OR REPLACE

NEXT -- Continue to next step.

9. CONFIRMATION TEST

NEXT -- END