C0297

DTC C0297

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0297 00

-
Brake Applied Output Circuit

Diagnostic Fault Information






Circuit/System Description

The body control module (BCM) provides a 5 V 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. The BCM then applies a signal through the stop lamp switch signal circuit to the engine control module (ECM) and trailer provision (RPO V92).

Conditions for Running the DTC

* The engine must be ON.

* The brake must be applied.

Conditions for Setting the DTC

The BCM detects a short to ground in the brake applied output circuit.

Action Taken When the DTC Sets

* The BCM stores the DTC to memory.

* The Service Vehicle Soon indicator is commanded ON.

Conditions for Clearing the DTC

A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

Reference Information

Schematic Reference

* Exterior Lights Schematics Exterior Lights Schematics

* Engine Controls Schematics [1][2]Electrical Diagrams

Connector End View Reference

Component Connector End Views A/C Compressor Clutch

Description and Operation

Exterior Lighting Systems Description and Operation Exterior Lighting Systems

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Programming and Relearning for scan tool information

Circuit/System Verification

Ignition ON, press and release the brake pedal. The stop lamps should turn ON and OFF when changing between the selected states.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the X2 harness connector at the ECM.

2. Connect a test lamp between the ECM signal circuit terminal 52 and ground.

3. Ignition ON, press and release the brake pedal. The test lamp should turn ON and OFF when changing between the selected states.

• If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit test normal, replace the TCM.

4. If all circuit tests normal, replace the BCM.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

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