2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 592
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, command the LED Backlighting ON and OFF with a scan tool. The ignition switch halo lamp should turn ON and OFF when
changing between the commanded states.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the S38 ignition mode switch.
2. Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 10 ohm
between the ground circuit terminal 4 and ground.
瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.
3. Connect a test lamp between the control circuit terminal 8 and the ground circuit terminal 4.
4. Command the LED Backlighting ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the
commanded states.
瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.
瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace
the K9 BCM.
5. If all circuits test normal, test or replace the S38 ignition mode switch.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Ignition and Start Switch Replacement (See: Powertrain Management/Ignition System/Sensors and Switches - Ignition System/Ignition
Switch/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, programming and setup
B2699
DTC B2575 or B2699
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 Descriptor
DTC B2575 01
- Left Headlamp Control Circuit Short to Battery
DTC B2575 02
- Left Headlamp Control Circuit Short to Ground
DTC B2575 04
- Left Headlamp Control Circuit Open
DTC B2699 01
- Right Headlamp Control Circuit Short to Battery
DTC B2699 02
- Right Headlamp Control Circuit Short to Ground
DTC B2699 04
- Right Headlamp Control Circuit Open
