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HOMESERVICE MANUALSJEEP2009WRANGLER X, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESANTI-LOCK BRAKESANTI-LOCK BRAKE SYSTEM - ELECTRICAL DIAGNOSTICSDTC TROUBLESHOOTINGC1240-STEERING ANGLE SENSOR OVERTRAVEL PERFORMANCEDIAGNOSTIC TEST
2009 Jeep Wrangler X, Automatic

Diagnostic Test

2009 Jeep Wrangler X, AutomaticSECTION Diagnostic Test
  1. PERFORM TEST DRIVE AND VERIFY DTC IS STILL ACTIVE 
    1. Turn the ignition on.
    2. With the scan tool, erase ABS DTCs.
    3. Cycle the ignition switch.
    4. Turn steering wheel from lock to lock.
    5. With the scan tool, read ABS DTCs.

      Does this DTC reset?

      Yes 

      • Go to step  2

      No 

  2. CHECK STEERING ANGLE SENSOR OUTPUT 
    1. Start the engine.
    2. Center the steering wheel.
    3. With the scan tool, read the Steering Angle Sensor Position.

      Is the Steering Angle Sensor Position within ±15°?

      Yes 

      • Go to step  4

      No 

      • Go to step  3
  3. INSPECT VEHICLE, STEERING COLUMN, AND INTERMEDIATE SHAFT FOR DAMAGE 
    NOTE: If possible, check vehicle repair history for collision damage.
    1. Turn the ignition off.
    2. Inspect the vehicle for damage causing tracking problems or steering wheel misalignment.
    3. Inspect the steering column and intermediate shaft for damage.
    4. Center the steering wheel.
    5. With the scan tool, read the Steering Angle Sensor Position.

      Is the Steering Angle Sensor Position within ±15°?

      Yes 

      No 

      • Go to step  4
  4. CHECK STEERING ANGLE CHANGE 
    1. Turn steering wheel so wheels point in a straight ahead position.
    2. With scan tool check steering angle if reading travels to 720 degrees while rotating wheel from lock to lock.
      NOTE: Sensor damage can occur if wheel is turned over 720 degrees.
    3. Rotate steering wheel to the right and the degrees will decrease and rotate steering wheel to the left and the degrees will increase.

      Did the steering angle change accordingly and display less than 720 degrees from lock to lock?

      Yes 

      • Go to step  5

      No 

  5. 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.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.