For 1990-2009 cars only
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 C0277: Brake Pedal Position Sensor CircuitDiagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Ignition | C0277 | C0277 | -- | -- |
Signal | C0277 | C0277 | C0277 | -- |
Circuit/System Description
The brake pedal switch provides a high side discrete input to the instrument panel cluster (IPC).
Conditions for Running the DTC
Battery voltage must be between 9-16 volts.
Conditions for Setting the DTC
| • | The brake pedal switch input to the IPC does not become active when vehicle conditions indicate it should be. |
| • | The brake pedal switch input to the IPC is active when vehicle conditions indicate it should not be. |
Conditions for Clearing the DTC
The current DTC clears when the fault is no longer present.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Special Tools
Circuit/System Verification
- Verify proper adjustment of the brake pedal switch assembly. Refer to Stop Lamp Switch Adjustment.
- Ignition ON, observe the scan tool Brake Pedal Switch parameter while pressing and releasing the brake pedal. The reading should change between Applied and Released.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the brake pedal switch.
- Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 3 and ground.
- Verify the scan tool Brake Pedal Switch parameter is Released.
- Install a 3A fused jumper wire between the signal circuit terminal 1 and the ignition circuit terminal 3. Verify the scan tool Brake Pedal Switch parameter is Applied.
- If all circuits test normal, test or replace the brake pedal switch assembly.
| ⇒ | If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, test the signal circuit terminal 1 for a short to ground. |
| ⇒ | If not the specified value, test the signal circuit terminal 1 for a short to voltage. If the circuit tests normal, replace the IPC. |
| ⇒ | If not the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the IPC. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for IPC replacement, Programming, and setup. |
