HVAC System Check
HVAC System CheckStep 1-7:
Customer Complaint Analysis
Record details of the problem (failure, complaint) and how it occurred as described by the customer.
For this purpose, use of such a questionnaire form will facilitate collecting information required for proper analysis and diagnosis.
NOTE: This form is a standard sample. It should be modified according to characteristics of each market.
Customer questionnaire (example)
Visual Inspection
As a preliminary step, be sure to perform visual check of the items that support proper functioning of the air conditioning system.
DTC Check
Refer to DTC Check DTC Check for checking procedure.
Troubleshooting for DTC
Perform applicable DTC troubleshooting and repair or replace faulty parts.
Check for Intermittent Problem
Check parts where intermittent trouble can easily occur (e.g., wire harness, connector, etc.) Intermittent Connection and Poor Contact Inspection.
Air Conditioning System Symptom Diagnosis
Check the parts or system suspected as a possible cause HVAC System Symptom Diagnosis.
Final Confirmation Test
Confirm that the problem symptom is gone and the air conditioning system is free from any abnormalities. If what has been repaired is related to DTC, clear DTC once, perform DTC confirmation procedure and confirm that no DTC is indicated.