C0281

Antilock Brake System

Diagnostic Information and Procedures

DTC C0281

Circuit Description

The stop lamp switch signal informs the EBCM when the brake pedal is pressed.

Conditions for Running the DTC

Either of the following conditions will cause the DTC to run:

The ignition is ON and the vehicle achieves at least 56 km/h (35 mph) before coming to a stop.
The ignition is ON and the vehicle experiences an ABS event lasting at least 1 second.

Conditions for Setting the DTC

The EBCM detects an open or shorted brake switch or brake switch circuit.

Action Taken When the DTC Sets

This information-only DTC is stored in EBCM memory until it is cleared by using the specified procedure.

Conditions for Clearing the DTC

The conditions for setting the DTC are no longer present and you use the scan tool Clear DTC's function.

Diagnostic Aids

Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to Testing for Electrical Intermittents,
Testing for Intermittent and Poor Connections, Wiring Repairs and Connector Repairs in Wiring Systems.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

4. This step tests for a shorted stoplamp switch.
5. This step tests for an open stoplamp switch.

DTC C0281 Steps 1 - 5:

DTC C0281 (cont'd) Steps 6 - 12: