Case IH 520242-14 - VCM – VCM: Steering valve controller internal fault

Fatal internal hardware or software failure within the steering valve's integrated control unit.

• MAGNUM AFS Connect
• Magnum AFS Connect tractors
• Steiger series
• Patriot Sprayers
• Patriot 3240

1. 1

   Check the CAN cable connecting the VCM to the steering valve to ensure it is not disconnected, broken, or short-circuited, and verify the VCM voltage supply to rule out undervoltage causing module drop-off.

2. 2

   Ensure all air has been bled from the steering system by turning the steering wheel fully left and fully right a minimum of 10 times. No abnormal noise or vibration should occur.

3. 3

   Verify the VCM configuration and End-of-Line (EOL) parameters for the steering wheel sensor type to rule out a configuration error mimicking an internal fault.

1. 1

   Inspect Wiring

   Physically inspect the harness between the VCM and the EH Steering Valve for chafing or pin damage.

2. 2

   Replace the Controller/Valve

   If wiring and voltage are intact and the VCM still reports an internal steering valve controller fault, the internal circuitry of the valve has failed. The electro-hydraulic steering valve assembly (or its bolt-on controller) must be replaced.

3. 3

   System Bleed

   After installing the new valve, bleed the hydraulic steering circuit by turning the wheel lock-to-lock at least 10 times.

4. 4

   Calibration

   Perform a steering calibration routine. Calibration must be performed on an on-road surface (i.e., unpainted concrete or asphalt) to ensure proper tire friction during the routine.