Important: The following steps must be completed before using the symptom tables.
- Perform the Vehicle System Check before using the symptom tables in order to verify that all of the following are true:
| • | The body control module (BCM) can communicate via the serial data link. |
- Review the system operation in order to familiarize yourself with the system functions. Refer to the following:
Visual/Physical Inspection
Several of the symptom procedures ask for a careful visual/physical check. This step is extremely important; it could lead to correcting a problem without further checks and can save valuable time. These checks include the following:
| • | Inspect the easily accessible or visible system components and harness connectors for obvious damage or conditions which could cause the symptom. |
| • | If only one lamp is inoperative, inspect and repair a poor connection or an open in the power feed or ground circuit before replacing the light bulb. Refer to
Circuit Testing
and
Wiring Repairs
. |
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose a symptom that does not set a DTC:
