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 depressed. The brake pedal position sensor stuck off test checks for brake pressure present with the brake pedal position sensor saying not 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. Start the engine.
6. With the scan tool, read and record the DTCs.

Is the DTC active at this time?

Yes

- Go To 2

No

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

2. THE BRAKE PEDAL POSITION (BPP) SENSOR FOR DAMAGE OR MECHANICAL FAILURE
1. Turn the ignition off.
2. Visually inspect the BPP Sensor for damage or mechanical failure.

Were any problems found?

Yes

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

No

- Go To 3

3. (B237) BPP SENSOR SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE




1. Disconnect the BPP Sensor haness connector.
2. Disconnect the ABS Module haness connector.
3. Measure the resistance of the (B237) BPP Sensor Supply circuit between the BPP Sensor harness connector and the ABS Module harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Go To 4

No

- Repair the (B237) BPP Sensor Supply circuit for an open circuit or high resistance.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

4. (B137) BPP SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE




1. Measure the resistance of the (B137) BPP Sensor Signal circuit between the BPP Sensor harness connector and the ABS Module harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Go To 5

No

- Repair the (B137) BPP Sensor Signal circuit for an open circuit or high resistance.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

5. (B937) BPP SENSOR SIGNAL SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE




1. Measure the resistance of the (B937) BPP Sensor Return circuit between the BPP Sensor harness connector and the ABS Module harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Go To 6

No

- Repair the (B937) BPP Sensor Signal Return circuit for an open circuit or high resistance.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

6. 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 between 15 and 35 km/h (9 and 22 mph).
4. With the scan tool, read the DTCs.

Does the DTC remain active?

Yes

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

No

- Test complete.