2010 Cadillac Truck SRX FWD V6-3.0L Page 596

2010 Cadillac Truck SRX FWD V6-3.0L Page 596

change between Active and Inactive.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the S30 headlamp switch.

2. Ignition ON, test for greater than 10V between the 12 V reference circuit terminal 1 and ground.

瀚慖f less than the specified range, test the 12 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the K9 BCM.

3. Test for 0.4K ohm to 1K ohm between the signal circuit terminal 12 and ground.

瀚慖f greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal,

replace the K9 BCM.

瀚慖f less than the specified range, test the signal circuit for a short to ground. If the circuit tests normal, replace the K9 BCM.

4. If all circuits test normal, test or replace the S30 headlamp switch.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Headlamp Switch Replacement (See: Lighting and Horns/Headlamp/Headlamp Switch/Service and Repair)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup and programming

B2745

DTC B2745

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 B2745 02

- Traction Control Switch Circuit Short to Ground

Diagnostic Fault Information

Circuit/System Description

The body control module (BCM) monitors the traction control switch. When the traction control switch is pressed once, the BCM will request the

electronic brake control module (EBCM) via serial data to disable the traction control. When the traction control switch is pressed for 5 seconds,

the BCM will request the EBCM to disable the stability control. The EBCM will request the instrument cluster via serial data to turn the traction

control off and stability control off indicator ON to notify the driver of the deactivation.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

The BCM detects a short to ground on the signal circuit.

Action Taken When the DTC Sets

The BCM ignores the traction control switch signal input.