Case IH 520210-19 - VCM – UCM: Cut-off solenoid disagreement

The control module is detecting a mismatch between the commanded state of the steering/road travel cut-off solenoid and the actual electrical feedback or physical switch position.

• MAGNUM AFS Connect
• Magnum 400 AFS Connect (Tier 3)

1. 1

   Verify the physical road travel switch in the cab to ensure it is not sticking and is transitioning correctly between open and closed states

2. 2

   Inspect the wiring harness between the UCM, the steering valve controller, and the cut-off solenoid for continuity, shorts to ground, or open circuits

3. 3

   Test the cut-off solenoid coil resistance to ensure it is within OEM specifications and not internally shorted or open

1. 1

   Disconnect battery power before servicing the UCM or steering valve circuits.

2. 2

   Replace the road travel switch if it fails continuity testing.

3. 3

   Replace the cut-off solenoid on the steering valve if the coil is out of specification or mechanically stuck.

4. 4

   Repair any damaged pins or chafed wires in the UCM harness leading to the steering valve controller.

5. 5

   Clear the UCM fault codes via the AFS Pro monitor or Case IH EST (Electronic Service Tool) and test-drive the tractor to verify the disagreement code does not return.