2010 Cadillac Truck SRX AWD V6-3.0L Page 577
Circuit/System Verification
Ignition ON, command the High Beams ON and OFF with a scan tool. The high beam headlamps should turn ON and OFF when changing between
the commanded states.
Circuit/System Testing
1. Ignition OFF, disconnect the X5 harness connector at the K9 BCM.
2. Ignition ON, test for greater than 10V between the control circuit terminal 18 and ground.
瀚慖f less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the X50A underhood fuse block.
3. If all circuits test normal, replace the K9 BCM.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Fuse Block Replacement (See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service and Repair/Removal and Replacement/Fuse
Block Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM, replacement, programming and setup
B2585
DTC B2585 or B3867
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* 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 Descriptors
DTC B2585 02
- Park Lamps Control Circuit Short to Ground
DTC B3867 02
- Right Park Lamp Control Circuit Short to Ground
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) energizes the park lamps by applying voltage to the park lamp control circuit. When the park lamp control circuit
is energized, the park lamps are illuminated.
Conditions for Running the DTC
Headlamp switch in park or low beam position.
Conditions for Setting the DTC
B2585 02
The BCM detects a short to ground on the left side park lamp control circuit.
