Diagnostic Aids
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
- The park brake must be unapplied and the transaxle must be in gear for the DRL to operate properly.
- If the DTC is a history DTC, the problem may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections .
DTC B2603
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Headlights/Daytime Running Lights (DRL) Schematics | |||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle |
| 2 |
|
Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
| 3 |
|
Go to Step 4 | Go to Step 5 |
| 4 |
|
Go to Step 5 | Go to Step 6 |
| 5 | Inspect for poor connections at the DRL relay. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 10 | Go to Step 8 |
| 6 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
. Did you find and correct the condition? |
Go to Step 10 | Go to Step 9 |
| 7 | Repair a short to voltage in the DRL relay control circuit. Refer to Circuit Testing
and Wiring Repairs
. Did you complete the repair? |
Go to Step 10 | - |
| 8 | Replace the DRL relay. Did you complete the replacement? |
Go to Step 10 | - |
| 9 | Replace the BCM. Refer to Control Module References
for replacement, setup, and programming. Did you complete the replacement? |
Go to Step 10 | - |
| 10 |
|
Go to Step 3 | System OK |