C0042-2A

C0042-2A-BRAKE PEDAL POSITION SENSOR - STUCK





For a complete wiring diagram, refer to the Wiring Information.

- When Monitored:
Ignition on.

- Set Condition:
The brake pedal position sensor rationality checks both failure modes of the brake pedal position sensor. The brake pedal position sensor stuck on test checks for a high vehicle speed condition where the brake pedal position sensor is continually pressed.





NOTE: If any other DTCs are present, repair them first before continuing with this diagnostic procedure.

1. VERIFY THE DTC IS ACTIVE

NOTE: This DTC must be active for the results of this test to be valid.

1. Turn the ignition on.
2. With the scan tool, read and record the DTCs.
3. With the scan tool, read and record the Environmental Data to help identify the conditions in which the DTC was set.
4. With the scan tool, erase the DTCs.
5. Perform the ABS VERIFICATION TEST. ABS Verification Test.
6. With the scan tool, read the DTCs.

Is the DTC active at this time?

Yes

- Go To 2

No

- Perform the ABS-INTERMITTENT CONDITION TEST. Testing and Inspection.

2. BRAKE PEDAL POSITION (BPP) SENSOR NOT APPLIED VOLTAGE
1. Start the engine.
2. With the scan tool, under "Data Display" monitor the BPP voltage and Stoplamp Switch while pressing the brake pedal slowly.

Does the voltage increase and the stoplamp switch status change when the BPP voltage reaches 0.3 volt while the brake pedal is being applied?

Yes

- Perform the ABS-INTERMITTENT CONDITION TEST. Testing and Inspection.

No

- Go To 3

3. INSPECT THE BRAKE PEDAL POSITION (BPP) SENSOR FOR INCORRECT INSTALLATION, DAMAGE OR MECHANICAL FAILURE
1. Turn the ignition off.
2. Visually inspect the BPP Sensor for Improper installation, damage or mechanical failure. Stop Lamp Switch - Installation.

Were any problems found?

Yes

- Repair as necessary.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Go To 4

4. BRAKE PEDAL POSITION (BPP) SENSOR
1. Replace the Brake Pedal Position (BPP) Sensor.
2. Perform the ABS VERIFICATION TEST. ABS Verification Test.

WARNING: To avoid possible serious or fatal injury, check brake capability is available before road testing.

3. Test drive the vehicle on mainly straight road conditions at a velocity above 20 km/h (12 mph).
4. With the scan tool, read the DTCs.

Does the DTC remain active?

Yes

- Replace the Anti-lock Brake System (ABS) Module. Anti-Lock Brake System Module - Removal
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Test complete.