GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2008 🢒 Equinox 🢒 Power and Signal Distribution 🢒 Wiring Systems and Power Management 🢒 DTC C0297

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 Descriptor

DTC C0297 00: Brake Applied Output Circuit

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Brake Pedal Position Sensor 5-Volt Reference

C0277 06, C0890 03

C0277 06

1

--

Brake Pedal Position Sensor Signal

C0277 06

C0277 06

C0277 07

C0277 09

C0277 4B

Brake Applied Signal

C0297 00 and P0571 00

2

2

--

Brake Pedal Position Sensor Low Reference

--

C0277 07

1

--

1. Stop Lamps Malfunction

2. Cruise Control Malfunction

Circuit/System Description

The brake pedal position sensor is used to sense the action of the driver application of the brake pedal. The brake pedal position sensor provides an analog voltage signal that will increase as the brake pedal is applied. The body control module (BCM) provides a low reference signal and a 5-volt reference voltage to the brake pedal position sensor. When the variable signal reaches a voltage threshold indicating the brakes have been applied, the BCM will apply battery voltage to the stop lamp relay control circuit as well as the brake applied signal circuit to the engine control module (ECM) and the transmission control module (TCM).

Conditions for Running the DTC
    • Battery voltage must be between 9-16 volts.
    • Brakes APPLIED.

Conditions for Setting the DTC

DTC C0297 00 will set when the BCM detects a short to ground in the brake applied signal circuit.

Actions Taken When the DTC Sets
    • The BCM stores the DTC to memory.
    • The Service Brake Assist indicator is commanded ON.

Conditions for Clearing the DTC
    • The condition responsible for setting the DTC no longer exists.
    • A history DTC will clear once 50 malfunction-free ignition cycles have occurred.

Reference Information

Schematic Reference

Exterior Lights Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Exterior Lighting Systems Description and Operation

Electrical Information Reference

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

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Testing

With LNJ

  1. Ignition OFF, disconnect the X1 harness connector at the ECM.
  2. Connect a test lamp between the signal circuit terminal 9 and ground.
  3. Ignition ON, command the stop lamps ON and OFF by applying and releasing the brake pedal. The test lamp should turn ON and OFF when changing between the commanded states.
    4. ⇒If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
    ⇒If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  4. If all circuits test normal, replace the ECM.

With LY7

  1. Ignition OFF, disconnect the X2 harness connector at the ECM.
  2. Connect a test lamp between the signal circuit terminal 52 and ground.
  3. Ignition ON, command the stop lamps ON and OFF by applying and releasing the brake pedal. The test lamp should turn ON and OFF when changing between the commanded states.
    4. ⇒If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
    ⇒If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  4. Ignition OFF, connect a test lamp between the signal circuit terminal 52 at the ECM harness connector and the connector terminal at the ECM.
  5. Ignition ON, command the stop lamps ON and OFF by applying and releasing the brake pedal. The test lamp should turn ON and OFF when changing between the commanded states.
    6. ⇒If the test lamp does not illuminate ON and OFF when commanded, replace the ECM.
  6. Ignition OFF, connect the X2 harness connector at the ECM.
  7. Disconnect the harness connector at the TCM.
  8. Connect a test lamp between the signal circuit terminal 16 and ground.
  9. Ignition ON, command the stop lamps ON and OFF by applying and releasing the brake pedal. The test lamp should turn ON and OFF when changing between the commanded states.
    10. ⇒If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
    ⇒If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  10. If all circuits test normal, replace the TCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for BCM, ECM, or TCM replacement, setup, and programming