C0297
DTC C0297Diagnostic Instructions
^ Perform the [Diagnostic System Check - Vehicle Diagnostic Information] prior to using this diagnostic procedure. Diagnostic System Check - Vehicle Diagnostic Information
^ Review [Strategy Based Diagnosis] for an overview of the diagnostic approach. Strategy Based Diagnosis
^ [Diagnostic Procedure Instructions - Vehicle Diagnostic Information] provides an overview of each diagnostic category. Diagnostic Procedure Instructions - Vehicle Diagnostic Information
DTC Descriptor
DTC C0297 00 Brake Applied Output Circuit.
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) applies a ground through the brake pedal position sensor low reference circuit to the brake pedal position sensor (BPP). The BCM supplies a 5-volt reference through the brake sensor reference voltage circuit to the BPP. When the brake pedal is being applied, the BPP then sends a variable voltage through the brake sensor signal circuit to the BCM. The BCM then applies a signal to the brake signal circuit to the engine control module (ECM) and transmission control module (TCM).
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The BCM detects a short to ground on the brake signal circuit.
Action Taken When the DTC Sets
The ECM and TCM will not function correctly.
Conditions for Clearing the DTC
The BCM clears these codes from current when the fault is removed from the system.
Circuit/System Verification
Ignition ON, press and release the brake pedal. The stop lamps should illuminate then go out.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the ECM, and TCM.
2. Connect a DMM at the ECM, between the brake signal circuit and the positive terminal of the battery.
3. Ignition ON, test for less than 0.1 volt
^ If greater than the specified range, test the brake signal circuit for a short to ground. If the circuit/connections test normal, replace the BCM.
4. Leave the DMM connected, connect the TCM harness connector.
5. Ignition ON, test for less than 0.1 volt
^ If greater than the specified range, replace the TCM
6. If the voltage is correct and all circuits/connections test normal, replace the ECM.
Repair Instructions
Perform the [Diagnostic Repair Verification - Vehicle Diagnostic Information] after completing the diagnostic procedure. Diagnostic Repair Verification - Vehicle Diagnostic Information
^ [Brake Pedal Position Sensor Replacement]
^ [Brake Pedal Position Sensor Calibration]
^ [Control Module References] for BCM, TCM and ECM replacement, setup and programming Programming and Relearning