Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

INITIALIZE ANTI-LOCK BRAKES SYSTEM (ABS) MODULE
1. Turn the ignition on.
2. With the scan tool, read ABS DTCs and record on the repair order.
  WARNING:
  To avoid possible serious or fatal injury, check brake capability is available before road testing.
  
  NOTE:
  When performing the ABS Initialization routine, the vehicle temperature must be above 10°C (50°F).
3. Initialize the ABS Module, Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
4. Park the vehicle.
  Was the ABS Module initialization successful?
  
  Yes
  - Go To 2
  No
  - Perform the ABS Module Initialization routine again, if still unsuccessful. Go To 4
CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, erase the DTCs.
3. Start the engine.
4. Press the brake pedal slowly.
5. With the scan tool, read ABS DTCs.
  Is the DTC active?
  
  Yes
  - Go To 3
  No
  - Test complete.
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 INSTALLATION .
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Go To 4
BRAKE PEDAL POSITION (BPP) SENSOR
1. Turn the ignition off.
2. Replace the Brake Pedal Position Sensor in accordance with the Service Information. Refer to INSTALLATION .
3. Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  WARNING:
  To avoid possible serious or fatal injury, check brake capability is available before road testing.
4. Test drive the vehicle by turning the vehicle left and right in a curving manner at a velocity between 15 and 35 km/h (9 and 22 mph).
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 ABS VERIFICATION TEST .
  No
  - Test complete.