C0277
DTC C0277 or DTC C0890
CIRCUIT DESCRIPTION
The body control module (BCM) applies a ground through the brake sensor reference low circuit to the brake pedal position (BPP) sensor. The BCM supplies a 5-volt reference through the brake sensor reference voltage circuit to the brake position sensor. When the brake pedal is being applied, the BPP sensor then sends a variable voltage signal through the brake sensor signal circuit to the BCM.
DTC DESCRIPTORS
This diagnostic procedure supports the following DTCs:
- DTC C0870 Device Voltage Reference Output Circuit
- 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
C0277 06
A short to ground or an open in the BPP sensor circuit is present.
C0277 07
A short to battery positive voltage in the BPP sensor circuit or the BPP sensor low reference circuit is present.
C0277 09
A malfunctioning BPP sensor or BCM.
C0277 4B
BPP sensor circuit calibration not learned.
C0890 03
A short to ground or an open in the BPP sensor voltage reference circuit is present.
C0890 07
A short to battery positive voltage in the BPP sensor voltage reference circuit is present.
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. Refer to Testing for Intermittent Conditions and Poor Connections. Component Tests and General Diagnostics
- If DTC C0277 09 is set, replace the BPP Sensor. If the DTC resets, replace the BCM.
TEST
