GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2007 🢒 Monte Carlo 🢒 Body Systems 🢒 Lighting 🢒 DTC C0277

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    •  Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0277 06: Brake Pedal Position Sensor Circuit Short to Ground or Open

DTC C0277 07: Brake Pedal Position Sensor Circuit Voltage Above Threshold

DTC C0277 09: Brake Pedal Position Sensor Circuit Rate of Change Above Threshold

DTC C0277 4B: Brake Pedal Position Sensor Calibration Not Learned

Diagnostic Fault Information

Circuit

Short to Ground

Open or High Resistance

Short to Voltage

Signal Performance

Brake Position Sensor Signal

C0277 06

C0277 06

C0277 07

C0277 09, C0277 4B

5-Volt Reference

C0277 06, C0890 03

C0277 06

C0277 07, 1

--

Low Reference

--

C0277 07, 1

--

--

1. Stop lamps are always ON

Circuit/System Description

The body control module (BCM) provides a 5-volt reference voltage and a low reference signal to the brake pedal position sensor (BPPS). When the brake pedal is applied, the BPPS sends a variable voltage signal, that will increase as the brake pedal is applied, through the stop lamp switch signal circuit to the BCM. In response to this signal, the BCM applies battery positive voltage to the stop lamps, center high mounted stop lamp (CHMSL), transmission control module (TCM), and engine control module (ECM). The stop lamps will not operate unless the ignition is in the ON position.

Conditions for Running the DTC

Battery voltage must be between 9-16 volts.

Conditions for Setting the DTC

C0277 06

The BCM detects a short to ground or an open on the brake pedal position sensor signal circuit for 0.5 second or greater.

C0277 07

The BCM detects a short to battery voltage in the brake pedal position sensor signal or low reference circuits for 0.5 second or greater.

C0277 09

The BCM detects the BPPS reading is erroneous.

C0277 4B

The BCM detect that the BPPS is not calibrated.

Action Taken When the DTC Sets
    • The Service Vehicle Soon indicator is commanded ON.
    • When DTC C0277 is set as current, the vehicle will not start.
    • If the DTC sets while the vehicle is running, the BCM will activate the brake lights when the vehicles transmission is not in the PARK position and the vehicle is not accelerating.

Conditions for Clearing the MIL/DTC
    • The condition responsible for setting the DTC no longer exists.
    • A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Diagnostic Aids

Important: The stop lamps will not illuminate unless the ignition is in the ON position. For more detailed information concerning stop lamp operation, refer to Exterior Lighting Systems Description and Operation .

Reference Information

Schematic Reference

Exterior Lights Schematics

Connector End View Reference

Lighting Systems Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs
    •  Connector Repairs

Scan Tool Reference

    •  Scan Tool Output Controls
    •  Scan Tool Data List
    •  Scan Tool Data Definitions

Circuit/System Testing

C0277 06 and C0277 07

  1. Ignition OFF, disconnect the harness connector at the brake pedal position sensor.
  2. Ignition OFF, verify that a test lamp illuminates between the low reference circuit terminal C and B+.
    3. ⇒If the test lamp does not illuminate, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the BCM.
  3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground.
    4. ⇒If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
    ⇒If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the BCM.
  4. Verify the scan tool BPP Sensor parameter is less than 2 counts.
    5. ⇒If greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the BCM.
  5. Install a 3A fused jumper wire between the signal circuit terminal B and the 5-volt reference circuit terminal A. Verify the scan tool BPP Sensor parameter is greater than 800 counts.
    6. ⇒If less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  6. If all circuits test normal, test or replace the brake pedal position sensor.

C0277 09

  1. Replace the brake pedal position sensor.
  2. Perform the scan tool BPP Sensor Calibration procedure.
  3. Operate the vehicle within the Conditions for Running and Setting the DTC and verify the DTC does not reset.
    4. ⇒If the DTC resets, replace the BCM.

C0277 4B

  1. Ignition ON, verify that no other brake pedal position sensor DTCs are set.
    2. ⇒If other brake pedal sensor DTCs are set, diagnosis those DTCs first.
  2. Ignition ON, perform the scan tool BPP Sensor Calibration procedure. Refer to Brake Pedal Position Sensor Calibration .
  3. Observe the scan tool BPPS Status parameter. The reading should be Learned.
    4. ⇒If not the specified value, replace the brake pedal position sensor. If the DTC resets, replace the BCM.

Repair Instructions

Important: Perform the Brake Pedal Position Sensor Calibration after replacement of the brake pedal position sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Brake Pedal Position Sensor Replacement
    •  Control Module References for BCM replacement, setup, and programming