Case IH 2521 (517974.05) - DEC – Universal Control Module (UCM): F2 Solenoid - Open circuit or short circuit to ground.

The control module has detected that the electrical circuit for the F2 synchronizer solenoid is either broken (open circuit) or has shorted out to a ground source. This solenoid is responsible for controlling the F2 (high range) engagement in the transmission.

• VESTRUM CVX
• Case IH Puma Series 160, 165, 170, 180, 185, 195, 200, 210, 215, 225, 230
• Case IH Maxxum Series 110, 115, 120, 125, 130, 135, 140, 145
• Case IH Magnum Series 210, 220, 225

1. 1

   Verify power and charging systems to ensure no external power supply is improperly connected and the tractor's charging system is not faulty

2. 2

   Inspect the wire harness and the specific F2 solenoid connector for damage, corrosion, or a short to ground

3. 3

   Test the solenoid by swapping the F1 and F2 solenoids (and valves) to see if the problem follows the solenoid, or perform a pressure test to confirm if the solenoid is failing to release or engage

4. 4

   Check the Universal Control Module (UCM) if the wiring and solenoid test fine

1. 1

   Locate F2 solenoid

   Locate the F2 solenoid. Depending on the exact model, it is typically located in the bell housing, on the transmission side cover, or on the transmission manifold block.

2. 2

   Disconnect connector

   Disconnect the F2 solenoid connector.

3. 3

   Test wiring harness

   Use a multimeter to test the wiring harness between the UCM and the solenoid connector for continuity and shorts to ground.

4. 4

   Remove faulty solenoid

   If the harness is intact but the solenoid fails electrical testing (or the swap test), remove the retaining pins/plugs holding the F2 solenoid valve in the manifold.

5. 5

   Install new solenoid

   Remove the faulty F2 solenoid and replace it with a new OEM unit. Lubricate the O-rings with the specified transmission fluid (e.g., Case IH Akcela) prior to reassembly.

6. 6

   Reconnect connector

   Reconnect the F2 solenoid connector.

7. 7

   Clear error code

   Once the physical repair is complete, use the diagnostic interface to clear the error code.

8. 8

   Test transmission

   Test the tractor's transmission system for normal operation.