Case IH 15227 – Steering Valve Controller / Vehicle Controller (CCM) or Engine Control Module (MR / PLD): Cut-off solenoid supply voltage too low / Unit pump for cylinder 3: Actuation fault

Indicates either the voltage supplied to the steering/vehicle cut-off solenoid has dropped below the acceptable operating threshold, or a mechanical/electrical failure in the unit pump/injector solenoid for cylinder 3 is preventing proper fuel delivery.

• Steiger T4B
• Case IH Farmall tractors (40, 45, 50) with Cab and CVT Transmissions
• Case IH Stage V MR equipment (MTA CCM & APH)
• Case IH heavy equipment utilizing MR-PLD engine management systems

1. 1

   [Cut-off Solenoid] Check the battery and overall system voltage to ensure it is within the normal operating range (usually 12V or 24V depending on the machine).

2. 2

   [Cut-off Solenoid] Inspect the wiring harness between the steering valve controller and the cut-off solenoid for open circuits, high resistance, chafing, or shorts to ground.

3. 3

   [Cut-off Solenoid] Check the steering valve controller's 5V reference supply to ensure the controller itself is not under-voltaging.

4. 4

   [Unit Pump] Check the electrical screw connections of the affected injector valve for short circuits or loose connections.

5. 5

   [Unit Pump] Disconnect the electrical screw connections of the affected injector valve and test the harness for continuity.

1. 1

   Disconnect battery

   [Cut-off Solenoid] Turn off the machine and disconnect the negative battery terminal.

2. 2

   Locate solenoid

   [Cut-off Solenoid] Locate the cut-off solenoid on the steering valve block or fuel injection pump (depending on exact machine configuration).

3. 3

   Disconnect harness

   [Cut-off Solenoid] Disconnect the wiring harness connector from the solenoid.

4. 4

   Check wiring harness

   [Cut-off Solenoid] Using a digital multimeter, check the continuity and resistance of the wiring harness back to the controller. Repair or splice any chafed or broken wires.

5. 5

   Test solenoid coil

   [Cut-off Solenoid] Test the solenoid coil resistance. If it is out of OEM specification (open or shorted), remove the retaining hardware and replace the cut-off solenoid.

6. 6

   Reconnect and test

   [Cut-off Solenoid] Reconnect the harness, restore battery power, and clear the fault codes. Test the system for proper operation.

7. 7

   Locate unit pump

   [Unit Pump] Locate the unit pump/injector for cylinder 3.

8. 8

   Inspect connections

   [Unit Pump] Inspect, clean, and tighten the electrical connections.

9. 9

   Replace unit pump

   [Unit Pump] If the wiring is intact but the fault persists, replace the unit pump/injector.

10. 10

    Reset engine-smoothness control

    [Unit Pump] Upon removing mechanical or electrical faults at the injector valves, the engine-smoothness control must be reset to zero using a diagnostic scan tool.