Diagnostic Aids
WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
- If the DTC B2628 is a history DTC, the fault may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
- An intermittent short to voltage in the following conditions may cause an intermittent malfunction to occur:
- The instrument panel lamps supply voltage circuit of the illumination lamps
- The BCM
DTC B2628
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Schematics | |||
| 1 | Did you perform the Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 | Do the instrument panel lamps turn ON with the headlamp switch in the PARK position? | Go to Diagnostic Aids | Go to Step 3 |
| 3 |
|
Go to Step 4 | Go to Step 5 |
| 4 | Repair a short to battery positive voltage in the instrument panel lamps supply voltage circuit of the illumination lamps. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 6 | - |
| 5 |
IMPORTANT:
Perform the set up procedure for the body control module (BCM). Refer to Body Control Module (BCM) Programming/RPO Configuration
in Body Control Systems. Replace the BCM. Refer to Body Control Module Replacement
in Body Control System.Did you complete the replacement? |
Go to Step 6 | - |
| 6 |
|
System OK | Go to Step 3 |