Air Conditioning System Check
Air Conditioning System CheckStep 1-8:
Description for Each Step
STEP 1. Customer complaint analysis
Talk to customer, and then record details of the problem.
Customer questionnaire (Example)
NOTE: The form is a standard sample. It should be modified according to conditions characteristic of each market.
STEP 2. Visual inspection
As a preliminary step, be sure to perform visual check of the items that support proper function of the air conditioning system referring to Visual Inspection:Auto A/C. Visual Inspection
STEP 3. DTC check Check
Check DTC referring to DTC Check:Auto A/C. DTC Check
STEP 4. DTC troubleshooting
Based on the DTC, perform an applicable DTC diagnostic flow and locate the cause of the trouble, namely in a sensor, wire harness, connector, actuator, HVAC control module or other part and repair faulty parts.
STEP 5. A/C system performance inspection
Inspect A/C system suspected to be a possible cause referring to A/C System Performance Inspection:Manual A/C. A/C System Performance Inspection
STEP 6. A/C system symptom diagnosis
Check any part or system suspected to be a possible cause referring to A/C System Symptom Diagnosis:Auto A/C. Automatic A/C
STEP 7. Check for intermittent problem
Check any part where an intermittent trouble is easy to occur (e.g., wire harness, connector, etc.), referring to Intermittent and Poor Connection Inspection and related circuit of trouble cord recorded. Intermittent and Poor Connection Inspection and related circuit of trouble cord recorded.
STEP 8. Final confirmation test
Confirm if the problem symptom is troubleshoot and the A/C system is free from any abnormal conditions. If there existed DTC, clear the DTC. Then, check if the DTC is still detected and if there is any other DTC.