C0277
DTC C0277
CIRCUIT DESCRIPTION
The body control module (BCM) applies a ground through the brake sensor reference low circuit to the brake pedal position sensor. The BCM supplies a 10-volt reference through the brake sensor reference voltage circuit to the brake pedal position sensor. When the brake pedal is being applied, the brake pedal position sensor then sends a variable voltage signal through the brake sensor signal circuit to the BCM.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC C0277 Brake Pedal Position Sensor Circuit
CONDITIONS FOR RUNNING THE DTC
The battery voltage must be between 9-16 volts.
CONDITIONS FOR SETTING THE DTC
- A short to ground or an open in the stop lamp switch signal circuit is present.
- A short to battery positive voltage or an open in the 10-volt reference circuit on the brake pedal position sensor.
- A short to ground in the I/P dimming voltage reference circuit.
- A malfunctioning brake pedal position sensor or BCM.
ACTION TAKEN WHEN THE DTC SETS
The stop lamps will not function correctly.
CONDITIONS FOR CLEARING THE DTC
- The DTC will clear on current status after the condition for setting the fault is corrected.
- A history DTC will clear after 100 consecutive ignition cycles without a fault present.
- A History or current DTC can be cleared using a scan tool.
DIAGNOSTIC AIDS
Perform a visual inspection for loose or poor connections at all related components.
TEST
