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 B2618 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 locations may cause an intermittent malfunction to occur:
- The courtesy lamps supply voltage circuit of the interior lamps
- The BCM
DTC B2618
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Interior Lights Schematics Connector End View Reference: Master Electrical Component List |
|||
| 1 | Did you perform the Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Lighting Systems |
| 2 | Turn the ignition to the RUN position. Do the interior lamps illuminate when the IP dimmer switch is in the ON position? |
Go to Diagnostic Aids | Go to Step 3 |
| 3 |
|
Go to Step 4 | Go to Step 5 |
| 4 | Test for and repair a short to voltage in the courtesy lamps supply voltage circuit of the interior 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 |