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Home >> Jeep >> 2014 >> Wrangler Sahara, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 21 (Antilock Brake System (Abs) - Electrical Diagnostics) >> DTC Troubleshooting >> C121A-09-Steering Angle Sensor Not Initialized - Component Failures >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2014 Dodge Journey. However, it is still accessible from the selected car via links, so may be relevant.
  1. INITIALIZE ANTI-LOCK BRAKES SYSTEM (ABS) MODULE 
    1. Turn the ignition on.
    2. With the scan tool, read and record the ABS DTCs.
      WARNING:

      To avoid possible serious or fatal injury, check brake capability is available before road testing.

    3. Initialize the ABS Module, perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
      NOTE:

      The ABS Module Initialization process must include driving the vehicle into a 90° turn.

    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  3
  2. VERIFY THE DTC IS ACTIVE 
    1. Turn the ignition on.
    2. With the scan tool, erase the DTCs.
      WARNING:

      To avoid possible serious or fatal injury, check brake capability is available before road testing.

    3. 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).
    4. Park the vehicle.
    5. With the scan tool, read ABS DTCs.

      Is the DTC active at this time?

      Yes 

      • Go To  3

      No 

      • Test complete.
  3. STEERING ANGLE SENSOR 
    1. Turn the ignition off to the lock position.
    2. Replace the Steering Angle Sensor in accordance with the Service Information. Refer to CLOCKSPRING, REMOVAL .
    3. Perform the ABS VERIFICATION TEST. Refer to STANDARD PROCEDURE .
      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 

      No 

      • Test complete.