Case IH 10001 – Auxiliary Control Unit: Upper lockout solenoid error

This code indicates an electrical issue—such as an open circuit, short circuit, or swapped wiring—in the circuit for the upper lockout solenoid (often designated as Valve 30 or component Y004).

• Puma/Mid Range Magnum
• Maxxum
• MAXXUM T4E
• Case IH Puma Series
• Case IH Magnum Series
• Case IH Steiger Series

1. 1

   Check for Open/Short Circuits: Inspect the wiring harness leading to the upper lockout solenoid for breaks, chafing, or an open circuit.

2. 2

   Test the Connector: Locate connector X507 (Upper Lockout Solenoid). Test wire 3280 (Suspension Lockout Solenoid Upper / Power) and wire 3281 (Suspension Lockout Solenoid Upper Return / Ground) for continuity and proper voltage.

3. 3

   Check for Swapped Connectors: Verify that the wiring harness connectors for Valve 30 (Upper Lockout, X507) and Valve 31 (Lower Lockout, X508) were not accidentally swapped during previous maintenance.

4. 4

   Check Current Sense Inputs: Verify that the current sense inputs for the upper and lower lockout solenoids have not been swapped at the controller.

1. 1

   Prepare tractor for service

   Park the tractor on a level surface, lower any implements, apply the parking brake, and turn off the engine. Relieve hydraulic pressure from the front suspension system.

2. 2

   Locate valve block

   Locate the front axle suspension valve block (typically mounted near the front axle/chassis).

3. 3

   Identify solenoid

   Identify the Upper Lockout Solenoid (Y004) on the valve block.

4. 4

   Inspect connector

   Disconnect connector X507. Inspect the pins for corrosion, moisture, or pushed-out terminals. Clean or repair the connector if necessary.

5. 5

   Remove faulty solenoid

   If the wiring and connector are intact, the solenoid coil itself has likely failed. Remove the retaining nut and slide the faulty solenoid coil off the valve cartridge.

6. 6

   Install replacement solenoid

   Install the replacement solenoid and tighten the retaining nut to the manufacturer's torque specification.

7. 7

   Reconnect connector

   Reconnect connector X507, ensuring it is not mixed up with the lower lockout solenoid (X508).

8. 8

   Clear fault codes

   Clear the fault codes using a diagnostic tool.

9. 9

   Recalibrate system

   After repairing front suspension components, the system may require recalibration. If code 10024 ("Front suspension not calibrated") appears, you must run the front axle calibration routine.