For 1990-2009 cars only
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: ABS/TCS Brake Switch CircuitDTC C0161 5A: ABS/TCS Brake Switch Plausibility Failure
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.
Reference Information
Schematic Reference
Antilock Brake System Schematics
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for Scan Tool Information
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 Verification
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
