DTC Descriptor
DTC C0161 00: Antilock Brake System (ABS) Brake Switch/Sensor Circuit
Diagnostic Fault Information
Important: Always perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
Circuit/System Description
The brake pedal position (BPP) sensor is an input to the body control module (BCM). The BCM then sends a 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 IPM supplies the 5-volt reference to the BPP.
Conditions for Running the DTC
| • | 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. |
| • | The vehicle speed is greater than 40 km/h (25 mph). |
| • | The vehicles acceleration exceeds 8 km/h per second (5 mph per second). |
| • | Brake pedal is not applied. |
| • | Master cylinder pressure is greater than 150 psi. |
| • | The vehicle speed is greater than 24 km/h (14 mph). |
| • | The vehicles deceleration exceeds 11.5 km/h per second (7 mph per second). |
Action Taken When the DTC Sets
| • | The EBCM disables the DRP for the duration of the ignition cycle. |
| • | The ABS remains functional. |
Conditions for Clearing the DTC
| • | The condition for the DTC is no longer present and the DTC is cleared with a scan tool. |
| • | 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 vehicle has been driven with the brake applied during acceleration.
Reference Information
Scan Tool Reference
Scan Tool Data List
for EBCM
Circuit/System Verification
With the ignition ON, use a scan tool to display DTCs for the body control module (BCM).
| ⇒ | If no DTCs are present, go to Diagnostic Aids. |
Repair Verification
Diagnostic Repair Verification
