DTC C0297
Diagnostic Instructions
DTC Descriptor
| DTC C0297 02: Brake Applied Output Circuit
Short to Ground |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Brake Applied Output Signal
|
C0297 02
|
-
|
-
|
-
|
|
| |
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 provides a low
reference signal and a 5 V 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 a 12 V signal to the brake applied output circuit to the
engine control module.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The BCM detects a short to ground on the control circuit.
Conditions for Clearing the DTC
The condition for setting the DTC is not longer present.
Reference Information
Schematic Reference
Cruise Control Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Exterior Lighting Systems Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Verify that DTC C0277 is not set
If DTC is set, refer to
DTC C0277 or C0890 .
Circuit/System Testing
| 1. |
Ignition OFF, disconnect the
appropriate harness connector at the K20 Engine Control
Module. |
| 2. |
Connect a test lamp between
the appropriate harness connector terminal listed below and
ground: |
| |
• |
With LDE or LDD or LLU or LPV
or LPL control circuit harness connector terminal 25 X1
|
| |
• |
With LSF or LBS control
circuit harness connector terminal 38 X1 |
| |
• |
With LUJ control circuit
harness connector terminal 33 X1 |
| 3. |
Ignition ON, push and release
the brake pedal. The test lamp should turn ON and OFF when changed
between pushed an released brake pedal. |
| ⇒ |
If the test lamp is always ON, test the control
circuit for a short to voltage. If the circuit tests normal,
replace the K9 Body Control Module. |
| ⇒ |
If the test lamp is always OFF, test the control
circuit for a short to ground or an open/high resistance. If the
circuit tests normal, replace the K9 Body Control Module. |
| 4. |
If all circuits test normal,
replace the K20 Engine Control Module. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
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