Test Description

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

2. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
4. This step is checking for DTCs in the BCM.
5. This step is checking for RAP specific DTCs.

Fig 1: Diagnostic System Check - Retained Accessory Power
Courtesy of GENERAL MOTORS CORP.

Fig 2: Scan Tool Output Controls
Courtesy of GENERAL MOTORS CORP.

Fig 3: Scan Tool Data List
Courtesy of GENERAL MOTORS CORP.