Case IH 520208-31 - VCM – VCM / UCM: Steering valve controller internal fault

The electrohydraulic steering valve controller has detected an internal failure or has been forced into a safe state by a peer safety controller via SPI.

• MAGNUM AFS Connect
• Case IH Magnum AFS Connect Series
• Case IH Steiger AFS Connect Series
• Case IH Optum AFS Connect Series

1. 1

   Check for peer fault codes in the VCM/UCM that may be forcing the steering controller into a safe state

2. 2

   Bleed the steering system by turning the steering wheel fully left, then fully right, a minimum of 10 times to remove air

3. 3

   Inspect the cable harness and connectors going to the steering valve control unit (PVED-CLS) for shorts, water ingress, or damaged pins

4. 4

   Verify software versions of the Steering Valve Controller (SVC) and Steering Redundant Controller (SRC) (version 2.02 / part 51631896 is known stable)

1. 1

   Resolve Associated Codes

   Diagnose and clear any other active codes in the VCM/UCM.

2. 2

   Software Flash

   If no wiring faults are found and the code is isolated, flash/update the Steering Valve Controller (SVC) to the latest software dataset using the Case IH Electronic Service Tool (EST).

3. 3

   Replace the Controller/Valve

   If the internal fault is a hard failure (hardware failure inside the PVED-CLS module), the steering valve controller module or the entire steering valve assembly must be replaced.

4. 4

   Perform Calibration

   After replacing the valve or controller, perform a steering calibration routine on an on-road surface (unpainted concrete or asphalt) to ensure proper friction, and ensure the steering valve is supplied with sufficient oil flow during the routine.