Circuit/System Testing

Ignition OFF, disconnect the harness connector at the BPPS.
Connect a DMM between the BPPS 5-volt reference circuit and the negative terminal of the battery.
Ignition ON, test for 4.7-5.2 volts.
- If less then 4.7 volts, test the BPPS 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit/connections test normal, replace the BCM.
- If greater than 5.2 volts, test the BPPS 5-volt reference circuit for a short to voltage. If the circuit/connections test normal, replace the BCM.
Connect a DMM between the BPPS low reference circuit and the negative terminal of the battery.
Ignition ON, test for less than 0.1 volt.
- If greater than 0.1 volt, test the BPPS low reference circuit for a short to voltage or an open/high resistance.
  If the circuit/connections test normal, replace the BCM.
Disconnect the DMM. Install a scan tool. Install a 3-amp fused jumper wire between the BPPS circuit and the BPPS 5-volt reference circuit.
Verify the scan tool brake pedal position sensor parameter is between 4.7-5.2 volts
- If less then 4.7 volts, test the BPPS circuit for a short to ground or an open/high resistance. If the circuit/connections test normal, replace the BCM.
- If greater than 5.2 volts, test the BPPS circuit for a short to voltage. If the circuit/connections test normal, replace the BCM.
If the voltage is correct and all circuits/connections test normal, replace the BPPS.