C0161

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
- Antilock Brake System (ABS) Brake Switch Circuit




Circuit/System Description

The electronic brake control module (EBCM) monitors inputs when the vehicle is stopping that it sees the brake pedal is pressed, the brake pressure increases, and the vehicle is slowing down, or when the vehicle is accelerating, the brake pedal is not pressed and the brake pressure does not increase.


Conditions for Running the DTC

* The vehicle speed is greater than 16 km/h (10 mph).
* The ignition voltage is greater than 9.5 volts.



Conditions for Setting the DTC

* The brake pedal is sensed as applied for 1 minute.
* The vehicle speed is greater than 21 km/h (13 mph).



Action Taken When the DTC Sets

The ABS/TCS/VSES if equipped, remains functional.


Conditions for Clearing the DTC

* The condition for the DTC is no longer present.
* The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.



Diagnostic Aids

The DTC C0161 00 can be set if the brake pedal is applied while accelerating.


Reference Information
Schematic Reference

Antilock Brake System Schematics ([1][2]Antilock Brakes / Traction Control Systems)
Connector End View Reference

Component Connector End Views
Description and Operation

ABS Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing
* Connector Repairs
* Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information


Circuit/System Verification

1. Ignition ON, observe the scan tool EBCM BPP parameter while applying and releasing the brake pedal. The reading should change between Applied and Released.
2. Verify that DTC C0277, C0297, or B3445 is not set.

• If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle




Repair Verification

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.