Symptom Diagnosis: Notes

WARNING: This page is about a different car, the 2002 Pontiac Sunfire, 2002 Chevrolet Cavalier, 2001 Pontiac Sunfire, and 2001 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The following steps must be completed before using the symptom tests. Perform the diagnostic system check before using the symptom tests in order to verify that all of the following are true:

There are no DTCs set.
The control modules can communicate via the serial data link.

Review the system operation in order to familiarize yourself with the system functions. See DESCRIPTION & OPERATION .