Diagnostic Test

WARNING: This page is about a different car, the 2012 RAM Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR DTC C107B-WHEEL SPEED COMPARATIVE PERFORMANCE
NOTE:
This DTC must be active for the results of this test to be valid.
1. Turn the ignition on.
2. With the scan tool, record and erase DTC's.
3. Cycle the ignition switch from off to on.
4. With the scan tool, read DTC's
  NOTE:
  The Antilock Brake Module must sense ALL 4 wheels at 12 km/h (7.5 m.p.h.) before it will extinguish the ABS indicators.
  
  Does the scan tool display: C107B-WHEEL SPEED COMPARATIVE PERFORMANCE?
  
  Yes
  - Go To 2.
  No
  - Perform the ABS INTERMITTENT CONDITION diagnostic procedure. Refer to ABS INTERMITTENT CONDITION .
CHECK WHEEL SPEED SENSOR SIGNALS
1. Turn the ignition on.
2. With the scan tool, monitor ALL the WSS speeds while an assistant drives the vehicle.
3. Slowly accelerate as straight as possible from a stop to 40 km/h (25 m.p.h.).
  Is one or more WSS speeds showing 0 km/h (0 m.p.h.) or not matching other wheel speeds?
  
  Yes
  - Go To 3.
  No
  - Perform the ABS INTERMITTENT CONDITION diagnostic procedure. Refer to ABS INTERMITTENT CONDITION .
CHECK WSS LOOSENESS, INSPECT SIGNAL, SUPPLY CIRCUITS/CONNECTORS/TERMINALS FOR DAMAGE
NOTE:
Check all terminals for broken, bent, pushed out, or corroded terminals.
1. Turn the ignition off.
2. Inspect the Antilock Brake Module harness connector, each WSS, and each WSS harness connector.
3. Inspect each WSS for looseness and not properly fastened.
4. Inspect each WSS Signal and WSS Supply circuits between each WSS and Antilock Brake Module for damage.
  Is any WSS loose or any of the wiring/connectors/terminals damaged?
  
  Yes
  - Repair as necessary.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Go To 4.
CHECK BRAKE SYSTEM
1. Turn the ignition off.
2. Check the brake fluid level.
3. Check for trapped air in brake lines.
4. Inspect for brake fluid leakage on vehicle.
5. Inspect for loose mounted brake hardware.
  Are any of the above conditions present?
  
  Yes
  - Repair as necessary.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Go To 5.
CHECK EACH TONE WHEEL FOR DAMAGE
1. Turn the ignition off.
2. Inspect each Tone Wheel for damage, missing teeth, cracks, or looseness.
  NOTE:
  The Tone Wheel teeth should be perfectly square, not bent, or nicked.
  
  Is the Tone Wheels damaged?
  
  Yes
  - Repair as necessary.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Go To 6.
ANTILOCK BRAKE MODULE - INTERNAL FAULT
1. Turn the ignition off.
2. Replace WSS in question and perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
3. With the scan tool, erase DTC's.
4. Road test the vehicle over 40 km/h (25 m.p.h.).
5. Turn the ignition on.
6. With the scan tool, read DTC's
  Did the DTC C107B-WHEEL SPEED COMPARATIVE PERFORMANCE reset?
  
  Yes
  - Replace the Antilock Brake Module in accordance with the Service Information.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Test Complete.