For 1990-2009 cars only
Important: Review the system operation in order to familiarize yourself with the HVAC Aotomatic system functions. Refer to HVAC Blower Controls Circuit Description , the HVAC Compressor Controls Circuit Description and the HVAC Air Delivery/Temperature Control Circuit Description .
Visual/Physical Inspection
| • | Inspect for aftermarket devices which could affect the operation of theHVAC System. Refer to Checking Aftermarket Accessories in Wiring Systems. |
| • | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. |
| • | If equipped, inspect the passenger compartment air filter for complaints of insufficient air flow. |
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
