2010 Cadillac Truck SRX AWD V6-3.0L Page 580
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC B2600 01
- Left Daytime Running Lamps Control Circuit Short to Battery
DTC B2600 02
- Left Daytime Running Lamps Control Circuit Short to Ground
DTC B2600 04
- Left Daytime Running Lamps Control Circuit Open
DTC B2605 01
- Right Daytime Running Lamps Control Circuit Short to Battery
DTC B2605 02
- Right Daytime Running Lamps Control Circuit Short to Ground
DTC B2605 04
- Right Daytime Running Lamps Control Circuit Open
Diagnostic Fault Information
Circuit/System Description
When the headlight switch is in the Auto position and the ambient light sensor detects sunlight, the body control module (BCM) will command the
daytime running lamps to illuminate by providing 12 volts to the daytime running lamp control circuit.
Conditions for Running the DTC
* The engine is running.
* Headlamp switch in AUTO position.
* The ambient light is day.
Conditions for Setting the DTC
B2600 01 or B2605 01
The BCM detects a short to voltage on the daytime running lamp control circuit
B2600 02 or B2605 04
The BCM detects a short to ground on the daytime running lamp control circuit
B2600 04 or B2605 04
The BCM detects an open/high resistance on the daytime running lamp control circuit
Action Taken When the DTC Sets
B2600 01 or B2605 01
The daytime running lamp will be continuously illuminated.
B2600 02, B2600 04, B2605 02 or B2605 04
The daytime running lamp will be inoperative
Conditions for Clearing the DTC
* The DTC will be current for as long as the fault is present.
