Step
| Action
| Value(s)
| Yes
| No
|
1
| Did you perform the DRL System
Check?
| --
|
Go to Step 2
| Go to
Daytime Running Lights (DRL) System Check
|
2
|
- Connect a scan tool to the vehicle.
- Perform the Body Control Module Diagnostic System Check. Refer
to
Diagnostic System Check - Body Control System
in Body Control System. Return to this step if the system check
reports System Normal.
- Select Body Control Module.
- Read the Ambient Light status.
Does the Ambient Light display show the specified value?
| DARK
|
Go to Step 3
|
Go to Step 6
|
3
|
- Select Body Control Module.
- Read the Auto Headlamps Enabled status.
- Ensure that the park brake is not applied.
- Turn the ignition switch to the RUN position.
Does the Auto Headlamps Enabled display show the specified value?
| YES
|
Go to Step 4
|
Go to Step 5
|
4
| Locate and repair the open in CKT 103 (WHT) between
the BCM and the underhood fuse block.
Is the repair complete?
| --
| Go to
Daytime Running Lights (DRL) System Check
| --
|
5
| Replace the BCM. Refer to
Body Control Module Replacement
in Body Control System.
Is the repair complete?
| --
| Go to
Daytime Running Lights (DRL) System Check
| --
|
6
|
- Cover the ambient light sensor. Ensure that no light reaches the
sensor.
- Select Body Control Module.
- Read the Ambient Light status.
Does the Ambient Light display show the specified value?
| DARK
|
Go to Step 8
|
Go to Step 7
|
7
| Replace the ambient light sensor.
Is the repair complete?
| --
| Go to
Daytime Running Lights (DRL) System Check
| --
|
8
| Did the headlamps illuminate?
| --
| Go to
Daytime Running Lights (DRL) System Check
|
Go to Step 3
|
