C0161

DTC C0161

Circuit Description
The brake switch informs the EBCM when the brake is depressed. The brake switch is normally closed, supplying 12 volts to the EBCM when the brake is released. When the brake pedal is pressed, voltage on the TCC brake switch signal circuit is O volts.

Conditions for Running the DTC
Any of the following conditions may cause the DTC to run.
- The vehicle accelerates from 0 km/h (0 mph) to a speed greater than 56 km/h (35 mph).
- The vehicle experiences an ABS event involving all hydraulic circuits.

Conditions for Setting the DTC
Any of the following conditions may cause the DTC to set.
- Voltage on the TCC brake switch signal circuit is always low.
- Voltage on the TCC brake switch signal circuit is always high.

Action Taken When the DTC Sets
The EBCM stores this information-only DTC for as long as the condition is present.

Conditions for Clearing the DTC
The Conditions for Setting the DTC are no longer present you can then use the scan tool Clear DTCs function.

Diagnostic Aids
Thoroughly inspect connections or circuitry that may cause an intermittent malfunction.

DTC C0161 / Steps 1 - 5:

DTC C0161 / Steps 6 - 12:

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 stern tests for an oven stoplamp switch.