Air Conditioning System Check

Air Conditioning System Check



1. Customer complaint analysis

Perform
"Customer complaint analysis".

Was customer complaint analysis performed?
YES
Go to Step 2.
NO
Perform customer complaint analysis.

2. Visual inspection

Perform
"Visual inspection".

Is there any faulty condition?
YES
Repair or replace malfunction part.
NO
Go to Step 3.

3. DTC check

Perform
"DTC check".

Is there any DTC code?
YES
Go to Step 4.
NO
Go to Step 5.

4. DTC troubleshooting

Perform
"DTC Troubleshooting".

Is there any faulty condition?
YES
Repair or replace malfunction part, and go to Step 7.
NO
Go to Step 5.

5. A/C system performance inspection

Perform
"A/C system performance inspection".

Is there any faulty condition?
YES
Repair or replace malfunction part, and go to Step 8.
NO
Go to Step 6.

6. Perform A/C system symptom diagnosis

Inspect and repair referring to A/C System Symptom Diagnosis A/C System Symptom Diagnosis:Auto A/C.

Is there any faulty condition?
YES
Repair or replace malfunction part, and go to Step 7.
NO
Go to Step 8.

7. Check for intermittent problem

Check for intermittent troubles referring to Intermittent and Poor Connection Inspection Intermittent and Poor Connection Inspection.

Is there any faulty condition?
YES
Repair or replace malfunction part, and go to Step 8.
NO
Go to Step 8.

8. Final confirmation test

Perform
"Final confirmation test".

Is there any malfunction code?
YES
Go to Step 4.
NO
End.

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 Visual Inspection:Auto A/C.

Step 3. DTC check

Check DTC referring to DTC Check DTC Check:Auto A/C.

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 A/C System Performance Inspection:Auto A/C.

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 A/C System Symptom Diagnosis:Auto 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 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.