C0161

DTC C0161

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach. Initial Inspection and Diagnostic Overview
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0161

Antilock Brake System (ABS) Brake Pedal Position Sensor Circuit Not Plausible

Circuit/System Description

The EBCM receives a serial data message from BCM that the brake pedal is applied and to ensure that the states of their feedback circuits agree.

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 9.5 volts.

Conditions for Setting the DTC

* The brake pedal is sensed as applied for 6 minutes.
* 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 switch is applied while accelerating.

Circuit/System Verification

1. Verify that the following DTC is not set: B3445.
^ If the DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code Descriptions

2. Ignition ON, observe the scan tool BCM Stoplamp relay command parameter. The reading should be ON when applied and OFF when unapplied.

Repair Verification

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests