DTC C0161. Cadillac DTS 2007

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2007 🢒 DTS 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 DTC C0161

Diagnostic Instructions

•	Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0161 00 : TCS Brake Switch Circuit

The brake pedal position (BPP) sensor is an input to the body control module (BCM). The BCM then sends a GMLAN serial data message to the electronic brake control module (EBCM) and other electronic control modules. The BPP sensor is a potentiometer type sensor with a 5 volt reference circuit and a low reference circuit. The BCM supplies the 5 volt reference to the BPP.

Conditions for Running the DTC

•	The ignition is ON.

•	The vehicle speed is greater than 16 km/h (10 mph).

•	The ignition voltage is greater than 8 volts.

Conditions for Setting the DTC

•	The brake pedal is sensed as applied during moderate to high vehicle acceleration.

•	With the vehicle decelerating, the brake pedal is sensed as released and the master cylinder pressure is greater than 90 psi.

Action Taken When the DTC Sets

•	The EBCM disables the traction control system (TCS) and vehicle stability enhancement system (VSES) for the duration of the ignition cycle.

•	The vehicle dynamics caution (VDC) indicator turns ON

•	The driver information center (DIC) displays the SERVICE TRACTION CONTROL message

•	The antilock brake system (ABS) remains functional.

Conditions for Clearing the MIL/DTC

•	The ABS indicator may remain illuminated after repairs are made and DTCs are cleared, until the vehicle is operated at speeds greater than 13 km/h (8 mph) and the self test is completed.

•	The condition for setting the DTC is no longer present.

•	The EBCM will clear a history DTC when a malfunction is not detected in 100 consecutive drive cycles.

Diagnostic Aids

The DTC C0161 00 can be set if the vehicle has been driven with the brake applied during acceleration.

Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Antilock Brake System Connector End Views

Electrical Information Reference

•	Circuit Testing

•	Connector Repairs

•	Testing for Intermittent Conditions and Poor Connections

•	Wiring Repairs

Scan Tool Reference

Scan Tool Data List

Circuit/System Verification

With the ignition ON, use a scan tool to display DTCs for the body control module (BCM).

⇒	If DTC C0277 is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle .

⇒	If no DTCs are present, go to Diagnostic Aids.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.