Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs and record on the repair order.
  Is the DTC active or pending?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE (B137) BPP SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the BPP Sensor harness connector.
3. Disconnect the ABS Module harness connector.
4. Check for continuity between ground and the (B137) BPP Sensor Signal circuit at the BPP Sensor harness connector.
  Is there continuity between ground and the (B137) BPP Sensor circuit?
  
  Yes
  - Repair the (B137) BPP Sensor Signal circuit for a short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
CHECK FOR THE (B137) BPP SENSOR SIGNAL CIRCUIT SHORTED TO THE (B937) BPP SENSOR RETURN CIRCUIT
1. Check for continuity between the (B137) BPP Sensor Signal circuit and the (B937) BPP Sensor Return circuit at the BPP Sensor harness connector.
  Is there continuity between the (B137) BPP Sensor Signal circuit and the (B937) BPP Sensor Return circuit?
  
  Yes
  - Repair the short between the (B137) BPP Sensor Signal circuit and the (B937) BPP Sensor Return circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
CHECK THE (B137) BPP SENSOR SIGNAL CIRCUIT FOR AN OPEN/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 3.0 Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the (B137) BPP Sensor Signal circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
VERIFY THE ABILITY OF THE ABS MODULE TO READ THE BPP SENSOR SIGNAL CIRCUIT
1. Reconnect the ABS Module harness connector.
2. Connect a jumper between the (B137) BPP Sensor Signal circuit and the (B237) BPP Sensor 5-Volt Supply circuit at the BPP Sensor harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs in the ABS Module.
  NOTE:
  The P057D-BRAKE PEDAL POSITION SENSOR CIRCUIT HIGH DTC should be active or pending with the jumper in place.
  
  Does the scan tool display as described above?
  
  Yes
  - Verify that there is good pin to terminal contact at the BPP Sensor connector and ABS Module connector. Replace the BPP Sensor if no problems were found in the connector.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 6
CHECK THE ANTI-LOCK BRAKE MODULE FOR BRAKE PEDAL SENSOR FAULTS
1. With the scan tool, read DTCs in the ABS Module.
  Is the ABS Module setting any DTCs against the Brake Pedal Sensor?
  
  Yes
  - Perform the diagnostic procedure in the ABS Module. Refer to DIAGNOSTIC CODE INDEX .
  No
  - Replace the ABS Module in accordance with the Service Information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM (ABS), REMOVAL AND INSTALLATION .