Important: Review the system operation in order to familiarize yourself with the
system functions. Refer to the following:
| • | Control Assembly Description |
| • | HVAC Blower Controls Circuit Description |
| • | Relays and Sensors Description |
Visual/Physical Inspection
| • | Inspect the easily accessible or visible system components for
obvious damage or conditions which could cause the symptom. |
| • | Inspect all related ground points for being clean and tight. |
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:
| • | System Performance Test |
| • | TXV A/C System Diagnosis (Insufficient Cooling) |
| • | Heat Excessive (Heater Mode) |
| • | Heat Excessive (Vent Mode) |
| • | Noise Diagnosis - A/C System |
| • | High or Low Temperature Control Effort |
