2010 Cadillac Truck SRX FWD V6-3.0L Page 792

2010 Cadillac Truck SRX FWD V6-3.0L Page 792

The body control module (BCM) monitors the brake pedal position sensor and sends a serial data message when the brake pedal is applied. When

the vehicle is stopping, the electronic brake control module (EBCM) monitors for the brake pedal applied serial data message from the BCM, with

the brake pressure increasing and the vehicle slowing down, or when the vehicle is accelerating, the brake pedal is not applied and brake pressure is

not increasing.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

* The EBCM detects 4 accelerations from standstill to a vehicle speed greater 40 km/h (26 MPH) without any brake light switch signal

changes.

* The EBCM detects the vehicle speed is greater than 20 km/h (13 MPH), the brake pedal is applied for 360 s, and brake pressure is less than

15 bar (218 PSI).

Conditions for Clearing the DTC

A current DTC clears when the diagnostic runs and passes.

Action Taken When the DTC Sets

No actions were taken.

Diagnostic Aids

The DTC C0161 5A can be set if the brake pedal is applied while accelerating or the brake pedal position sensor is out of adjustment.

Reference Information

Schematic Reference

Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)

Description and Operation

ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

Ignition ON, observe the stop lamps while applying and releasing the brake pedal. Verify the stop lamps operate properly.

If the stop lamps do not operate properly, refer to Symptoms - Lighting (See: Lighting and Horns/Testing and Inspection/Symptom Related

Diagnostic Procedures/Symptoms - Lighting).

Circuit/System Testing

1. Ignition OFF, inspect the B22 Brake Pedal Position Sensor for correct installation.

瀚慖f loose or incorrect installation is diagnosed, correct the installation of the component.

2. Ignition ON, perform the Brake Pedal Position Sensor Calibration () and verify the DTC does not reset.

瀚慖f the DTC resets, replace the K17 Electronic Brake Control Module (EBCM).