Case IH U122 – Electronic Draft Control (EDC) Module / Front Suspension Control Module / Full Power Shift Transmission (FPS) Controller: Inclinometer offset out of range

This is a calibration error indicating that the electronic control system is receiving a baseline reading from the inclinometer (tilt/level sensor) that falls outside the acceptable parameters. Because the sensor's baseline is skewed, the system cannot establish a true "zero" or level reference, which prevents the successful completion of calibration routines.

• Case IH Puma Series (165, 180, 195, 210, 225 CVX)
• Case IH Magnum Series (MX210, MX230, MX255, MX285)
• Case IH Farmall Series (40, 45, 50 CVT, 115U)
• Case IH Steiger Series

1. 1

   Check the Ground: Ensure the vehicle is parked on completely flat, level ground (preferably a concrete shop floor).

2. 2

   Check for Attachments: Remove any rear attachments or heavy implements. The weight of an implement can alter the tractor's stance and throw off the inclinometer reading.

3. 3

   Check the Wheels/Tires: Verify that the correct set of wheels is installed and that tire pressures are even. Incorrect tire sizes or mismatched inflation will physically tilt the tractor.

4. 4

   Review Sensor Installation: Inspect the physical installation of the inclinometer sensor. Ensure the mounting bracket is not bent, loose, or installed backward.

1. 1

   Relocate the Tractor

   Move the tractor to a verified flat and level surface.

2. 2

   Strip the Machine

   Detach all rear implements and attachments.

3. 3

   Verify Stance

   Check tire sizes and pressures to ensure the chassis is sitting perfectly level.

4. 4

   Inspect the Sensor

   Locate the inclinometer sensor on the chassis. Inspect its mounting hardware. Tighten or adjust the installation if it is loose or crooked.

5. 5

   Check Wiring

   Inspect the 3-wire polyurethane conductor cable and connector going to the inclinometer for any damage, corrosion, or loose pins (it operates on a 5-Volt reference).

6. 6

   Re-Calibrate

   Re-run the calibration procedure (e.g., EDC, Suspension, or Transmission calibration) via the tractor's display or H-menu diagnostics.

7. 7

   Replace Sensor

   If the tractor is perfectly level, the wiring is intact, and the calibration still fails with code U122, the inclinometer sensor has failed internally and must be replaced.