C0042-11

C0042-11-BRAKE PEDAL POSITION SENSOR - CIRCUIT SHORT TO GROUND





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

- When Monitored:
Ignition on.

- Set Condition:
When the Anti-lock Brake System (ABS) Module detects a short from the Brake Pedal Position (BPP) Sensor.





NOTE: If DTC C1246-1C is present, perform the diagnostics for this DTC before continuing with this diagnostic procedure.

1. VERIFY THE DTC IS ACTIVE
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. Slowly press the brake pedal completely.
7. 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. 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 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. (B137) BPP SENSOR SIGNAL CIRCUIT SHORTED TO GROUND




1. Measure the resistance between ground and the (B137) BPP Sensor Signal circuit in the BPP Sensor harness connector.

Is the resistance above 5 Ohms?

Yes

- Go To 6

No

- Repair the (137) BPP Signal Signal circuit for a short to ground.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

6. (B137) BPP SENSOR SIGNAL CIRCUIT SHORTED TO THE (B937) BPP SENSOR RETURN CIRCUIT




1. Measure the resistance between ground and the (B937) BPP Sensor Return circuit and the (B137) BPP Sensor Signal circuit in the BPP Sensor harness connector.

Is the resistance above 5 Ohms?

Yes

- Go To 7

No

- Repair the (B137) BPP Sensor Signal circuit and the (B937) BPP Sensor Return circuit for a short.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

7. 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. Anti-Lock Brake System Module - Removal.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Test complete.