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.

PERFORM TEST DRIVE AND VERIFY DTC IS STILL ACTIVE
NOTE:
If present, diagnose and repair DTC C1219-STEERING ANGLE SENSOR ERRATIC PERFORMANCE, C121A-STEERING ANGLE SENSOR NOT INITIALIZED, or C1240-STEERING ANGLE SENSOR OVERTRAVEL PERFORMANCE before diagnosing this DTC.
1. Ignition on, engine not running.
2. With the scan tool, erase ABS DTC's.
3. Cycle the ignition switch.
  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 or right in a curving manner at a velocity between 10 and 25 km/hr (6 and 15 m.p.h.).
5. Park the vehicle.
6. With the scan tool, read ABS DTC's.
  Does this DTC reset?
  
  Yes
  - Go To 2.
  No
  - Perform the ABS INTERMITTENT CONDITION diagnostic procedure. Refer to ABS INTERMITTENT CONDITION .
CHECK STEERING ANGLE SENSOR OUTPUT
1. Start the engine.
2. Turn the steering wheel so wheels point in a straight ahead position.
3. With the scan tool, read the Steering Angle Sensor position.
  Is the Steering Angle Sensor Position within ± 15° degrees?
  
  Yes
  - Go To 5.
  No
  - Go To 3.
INSPECT VEHICLE, STEERING COLUMN, AND INTERMEDIATE SHAFT FOR DAMAGE
NOTE:
If possible, check vehicle repair history for collision damage.
1. Turn ignition off to the lock position.
2. Inspect the vehicle for damage causing tracking problems or steering wheel misalignment.
3. Inspect the steering column and intermediate shaft for damage.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Go To 4.
CHECK CLOCKSPRING (SAS) INSTALLATION
WARNING:
To avoid serious or fatal injury on vehicles equipped with airbags, disable the Supplemental Restraint System (SRS) before attempting any steering wheel, steering column, airbag, seat belt tensioner, impact sensor, or instrument panel component diagnosis or service. Disconnect and isolate the battery negative (ground) cable, then wait two minutes for the system capacitor to discharge before performing further diagnosis or service. This is the only sure way to disable the SRS. Failure to take the proper precautions could result in accidental airbag deployment.

NOTE:
Proper Clockspring (SAS) installation is crucial for proper operation.
1. Verify that the Clockspring (SAS) is properly installed.
  Is the Steering Angle Sensor properly installed?
  
  Yes
  - Go To 5.
  No
  - Repair as necessary and clear offsets by initializing ECU with wheels pointing straight ahead.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
RE-INITIALIZE THE ESC MODULE
1. Perform ECU initialization with drive test to clear offsets. Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  Is DTC C123F-STEERING ANGLE SENSOR COMPARATIVE PERFORMANCE still active?
  
  Yes
  - Go To 6.
  No
  - Sensor was probably loose or calibrated with wheels not centered to vehicle. Test complete.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
CHECK STEERING ANGLE SENSOR OUTPUT WHILE ROTATING THE STEERING WHEEL
1. With the scan tool, read the Steering Angle Sensor position while rotating the steering wheel to the right and then to the left. The Steering Angle Sensor position should decrease when rotating the steering wheel to the right and increase when rotating the steering wheel to the left.
  Did the steering angle change accordingly?
  
  Yes
  - Replace the Antilock Brake System (ABS) Module in accordance with the Service Information.
  - Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  No
  - Replace the Clockspring (SAS) in accordance with the Service Information. Refer to CLOCKSPRING, INSTALLATION .