Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. 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 STANDARD PROCEDURE .
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 SWITCH, STOP LAMP, INSTALLATION .
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 3
BRAKE PEDAL POSITION (BPP) SENSOR NOT APPLIED VOLTAGE
1. Start the engine.
2. With the scan tool, under "Data Display" read the BPP voltage with brake pedal not pressed.
3. Press the brake pedal several times.
4. Lightly pull upward on the brake pedal.
  Was the brake pedal not applied BPP voltage change greater than 0.3 volt?
  
  Yes
  - Go To 4
  No
  - Replace the Brake Pedal Position Sensor in accordance with the Service Information. Refer to SWITCH, STOP LAMP, REMOVAL .
BRAKE PEDAL POSITION (BPP) SENSOR
1. Replace the Brake Pedal Position Sensor in accordance with the Service Information. Refer to SWITCH, STOP LAMP, REMOVAL .
2. Turn the ignition on.
  NOTE:
  When performing the Brake Pedal Calibration routine, make sure the brake pedal is not pressed.
3. With the scan tool, under "Miscellaneous Functions" run the Brake Pedal Calibration routine.
4. With the scan tool, erase the DTCs.
5. With the scan tool, read the DTCs.
  Does the DTC remain active?
  
  Yes
  - 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 STANDARD PROCEDURE .
  No
  - Test complete.
  - Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .