Antilock Brake System (With JL9)

DTC C0161 (With JL9)

Diagnostic Instructions

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

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

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

DTC Descriptor

DTC C0161 62

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Antilock Brake System (ABS) Brake Switch Actuator Stuck Open

DTC C0161 63

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Antilock Brake System (ABS) Brake Switch Actuator Stuck Closed

Circuit/System Description

The electronic brake control module (EBCM) receives a serial data message from body control module (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 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 [1][2]Antilock Brakes / Traction Control Systems

Connector End View Reference

Component Connector End Views 1-2 Shift Solenoid (SS) Valve (M30)

Description and Operation

ABS Description and Operation Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

Apply and release brake pedal. Verify brake lamps operate properly. If brake lamps do not operate properly, review brake pedal switch diagnostics in lighting. Refer to Symptoms - Lighting Symptoms - Lighting.