Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Durango. However, it is still accessible from the selected car via links, so may be relevant.

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, erase the DTCs.
4. Start the vehicle.
5. Apply the brake pedal several times.
6. With the scan tool, read the ABS DTCs.
  Is the DTC active at this time?
  
  Yes
  - Go To 2
  No
  - Perform the ABS INTERMITTENT CONDITION TEST. Refer to ABS INTERMITTENT CONDITION .
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. Refer to SENSOR, STOP LAMP, INSTALLATION .
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Go To 3
BRAKE PEDAL POSITION (BPP) SENSOR VOLTAGE
1. Turn the ignition on.
2. With the scan tool, under "Data Display" monitor the Brake Pedal Sensor voltage.
3. Press the brake pedal slowly.
  Did the Brake Pedal Sensor voltage change smoothly?
  
  Yes
  - Go To 5
  No
  - Go To 4
BRAKE SYSTEM SIGNALS
1. Turn the ignition on.
2. With the scan tool, under "Data Display" monitor the Master Cylinder Brake Pressure and the Brake Pedal Sensor voltage.
3. Press the brake pedal slowly.
  Did the Master Cylinder Brake Pressure and the Brake Pedal Sensor voltage change smoothly?
  
  Yes
  - Go To 5
  No
  - Replace the Anti-lock Brake System (ABS) Module in accordance with the Service Information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM, REMOVAL .
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
BRAKE PEDAL POSITION (BPP) SENSOR
1. Turn the ignition off.
2. Disconnect the BPP Sensor harness connector.
3. Turn the ignition on.
4. Measure the voltage at the BPP Sensor harness connector between the (B237) BPP Sensor Feed and the (B937) BPP Sensor Return.
  Is the voltage above 4.75 volts?
  
  Yes
  - Replace the Brake Pedal Position (BPP) Sensor in accordance with the Service Information. Refer to SENSOR, STOP LAMP, REMOVAL .
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Replace the Anti-lock Brake System (ABS) Module in accordance with the service information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM, REMOVAL .
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .