Case IH 96 – TMF (Tractor Multi-Function): The steering angle sensor is below the expected operating range.

The controller is receiving a voltage or signal from the steering angle sensor that has dropped below the minimum acceptable threshold. This typically indicates an open circuit, a short to ground, a failed sensor, or a mechanical failure/misalignment where the sensor mounts to the steering cylinder.

• Magnum
• Magnum 180
• Magnum 200
• Magnum 215
• Magnum 220
• Magnum 240
• Magnum 245
• Magnum 275
• Magnum 305
• Magnum 335
• Maxxum 100
• Maxxum 115
• Maxxum 125
• Maxxum 135
• Maxxum 145
• Maxxum 150
• Optum 270
• Optum 300
• Puma 170
• Puma 185
• Puma 200
• Puma 215
• Puma 220
• Puma 230
• Puma 240
• Steiger 370
• Steiger 420
• Steiger 470
• Steiger 500
• Steiger 540
• Steiger 550
• Steiger 580
• Steiger 620
• Steiger Quadtrac 370
• Steiger Quadtrac 420
• Steiger Quadtrac 470
• Steiger Quadtrac 500
• Steiger Quadtrac 540
• Steiger Quadtrac 550
• Steiger Quadtrac 580
• Steiger Quadtrac 620
• Axial-Flow 8250
• Axial-Flow 2388
• Patriot 3230
• Patriot 3320
• Patriot 3330
• Patriot 4420
• Patriot 4430

1. 1

   Use the cab display to clear the fault code and check if it immediately returns to verify if the issue is intermittent

2. 2

   Check the steering angle sensor wire harness for physical damage, pinched wires, or corrosion at the connectors that could cause an open circuit or a short to ground

3. 3

   Inspect the steering cylinder and sensor housing for physical damage or mechanical misalignment

4. 4

   Verify the 8-volt reference voltage coming from the TMF controller to ensure the controller itself is not failing

1. 1

   Clear the Code

   Attempt to clear the code via the display monitor. If the code remains active, proceed to physical repairs.

2. 2

   Repair/Replace Harness

   If diagnostic testing reveals a short or break in the wiring, replace the steering angle sensor wire harness.

3. 3

   Replace the Sensor / Cylinder

   If the wiring is intact, the sensor itself has likely failed. On models with external sensors, unbolt the old sensor from the steering linkage/axle and install the replacement. On some newer models (like the 8250 combine), the steering angle sensor is internally integrated into the steering cylinder, requiring you to swap out the entire steering cylinder assembly.

4. 4

   Calibrate the System

   After replacing the sensor or the cylinder, you must perform a steering angle sensor calibration using the tractor's display monitor or a diagnostic service tool (like Jaltest or the Autopilot Toolbox) to teach the TMF controller the new center, left-lock, and right-lock parameters.