Important: The following steps must be completed before using the symptom tables.
Perform the
Diagnostic System Check
before using the Symptom Tables
in order to verify that all of the following are true:
| • | The control modules can communicate via the serial data link. |
Visual/Physical Inspection
| • | Inspect the easily accessible or visible system components for
obvious damage or conditions which could cause the symptom. |
| • | Verify the A/C compressor clutch turns freely and is not seized. |
| • | Verify that the customer is using the correct key to enable personalization
and is not inadvertently activating steering wheel or passenger HVAC controls. |
| • | The A/C compressor will not operate in cold ambient air temperatures. |
| • | The following conditions may cause window fogging: |
| - | Blocked A/C evaporator drain tube |
| - | Maximum passenger capacity |
| - | Blocked body pressure relief valves |
| • | Inspect the air distribution system for causes of reduced air
flow: |
| • | Obstructed or dirty passenger compartment air filter, if equipped |
| • | Blocked or damaged air inlet or outlet vents |
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:
