How To Proceed With Troubleshooting

AIR CONDITIONING: AIR CONDITIONING SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
- Use these procedures to troubleshoot the air conditioning system.
- *: Use Techstream.

1. VEHICLE BROUGHT TO WORKSHOP
NEXT -- Continue to next step.

2. CUSTOMER PROBLEM ANALYSIS
(a) Confirm the problem symptoms.
NEXT -- Continue to next step.

3. CHECK AND CLEAR DTCS*
NEXT -- Continue to next step.

4. PROBLEM SYMPTOM CONFIRMATION

Result





B -- GO TO STEP 6
A -- Continue to next step.

5. SYMPTOM SIMULATION
NEXT -- Continue to next step.

6. CHECK MULTIPLEX COMMUNICATION SYSTEM*
(a) Check for the DTC outputs.

Result





B -- GO TO MULTIPLEX COMMUNICATION SYSTEM
7. CHECK CAN COMMUNICATION SYSTEM*

Result





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

8. DTC CHECK (OTHER THAN MULTIPLEX DTC)*

Result





B -- GO TO STEP 10
A -- Continue to next step.

9. DTC CHART
NEXT -- Continue to next step.

10. PROBLEM SYMPTOMS TABLE
NEXT -- Continue to next step.

11. TERMINALS OF ECU
NEXT -- Continue to next step.

12. CIRCUIT INSPECTION
NEXT -- Continue to next step.

13. IDENTIFICATION OF PROBLEM
NEXT -- Continue to next step.

14. REPAIR OR REPLACE
NEXT -- Continue to next step.

15. CONFIRMATION TEST
NEXT -- END