C081

DTC C0281 or C081
Circuit Description
The stop lamp switch signal informs the electronic brake control module (EBCM) when the brake pedal is pressed.

DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0281 Stoplamp Switch Circuit

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 antilock brake system (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 DTCs function.

Diagnostic Aids
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction. Refer to the following:
^ Testing for Electrical Intermittents Component Tests and General Diagnostics
^ Testing for Intermittent Conditions and Poor Connections Component Tests and General Diagnostics
^ Wiring Repairs
^ Connector Repairs

Test Description
The numbers below refer to the step numbers on the diagnostic table.
4. This step tests for a shorted stop lamp switch.
5. This step tests for an open stop lamp switch.

Step 1 - Step 12: