Case IH 519573-02 - UCM – UCM: Steering valve controller calibration fault

Indicates that the steering valve controller has failed its calibration process, either due to an out-of-range signal, an incomplete calibration sequence, or a hardware failure preventing the controller from learning the valve's limits.

• MAGNUM AFS Connect
• Case IH Magnum AFS Connect Series (Models 180, 200, 220, 240, 250, 280, 310, 340, 380, 400)
• Case IH Steiger / Quadtrac AFS Connect Series

1. 1

   Check ISOBUS Communication: Ensure there are no active ISOBUS communication faults (such as 518924-19) that could interrupt the steering controller.

2. 2

   Inspect the Wheel Angle Sensor: Check the physical mounting and wiring harness of the wheel angle sensor on the steering axle.

3. 3

   Check LVDT Sensor Connections: Inspect the LVDT (Linear Variable Differential Transformer) sensor connection directly on the steering hydraulic valve.

4. 4

   Verify Hydraulic Valve Assembly: Ensure there is no incorrect assembly or physical binding of the steering hydraulic valve.

1. 1

   Turn on the tractor

   Turn on the tractor and allow the Pro 1200 display to boot up.

2. 2

   Navigate to diagnostic page

   Navigate to the ISObus diagnostic page (or the Steering settings page) on the Pro 1200 display.

3. 3

   Initiate Calibration

   Run the built-in calibration wizards for both the Wheel Angle Sensor and the Steering Valve.

4. 4

   Monitor the Calibration

   Follow the on-screen prompts. If the calibration fails (often noted as "out of range" after multiple attempts), the system will abort.

5. 5

   Repair/Replace

   If the calibration repeatedly fails and wiring checks out, replace the faulty Electro-Hydraulic Steering Valve or the Wheel Angle Sensor.

6. 6

   Recalibrate

   After replacing any steering component, you must successfully rerun the Wheel Angle Sensor and Steering Valve calibrations to clear the 519573-02 code.