Case IH 2111 – Transmission Control Unit (Trans / TCU): FNR Neutral Switch high Voltage fault

The controller is receiving a voltage signal from the Forward-Neutral-Reverse (FNR) switch that is higher than the expected normal operating range. This typically points to a short to power, an open circuit in the wiring, or an internal failure of the FNRP (Forward-Neutral-Reverse-Park) switch assembly.

• Magnum
• Steiger T4B
• Magnum 180
• Magnum 190
• Magnum 210
• Magnum 225
• Magnum 235
• Magnum 245
• Magnum 260
• Magnum 290
• Magnum 310
• Magnum 340
• Magnum 370
• Magnum 380
• Steiger Series

1. 1

   Cycle the Shuttle Lever: The internal switches inside the FNRP pod can physically bind or stick. Vigorously cycling the shuttle lever can sometimes free up stuck switches as a temporary diagnostic measure.

2. 2

   Check Fuses: Inspect the 30-amp FNR fuse (typically located in the fuse panel behind the seat) to ensure it is not blown.

3. 3

   Inspect Wiring and Connectors: Check the wiring harness and the electrical connector at the base of the steering column for damaged wires, loose pins, or a short to a 12V power source.

4. 4

   Check Battery Voltage: Verify that the tractor's batteries are fully charged. Dead or low batteries can cause the computer to hiccup and log erratic shifting faults.

1. 1

   Prepare tractor for repair

   Park the tractor on a level surface, turn off the engine, and disconnect the battery.

2. 2

   Remove steering wheel

   Remove the steering wheel to gain clear access to the steering column.

3. 3

   Remove steering column covers

   Take off the plastic steering column covers to expose the gear selector (FNRP) assembly.

4. 4

   Disconnect wiring harness

   Disconnect the multi-pin electrical wiring harness from the gear selector switch.

5. 5

   Remove faulty assembly

   Unbolt and remove the faulty gear selector assembly from the column.

6. 6

   Install new assembly

   Install the new gear selector switch assembly and secure it with the mounting hardware.

7. 7

   Reconnect wiring harness

   Reconnect the electrical wiring harness.

8. 8

   Reinstall covers and wheel

   Reinstall the steering column covers and the steering wheel.

9. 9

   Test shuttle shifting

   Reconnect the battery, start the tractor, and test the shuttle shifting (Forward, Neutral, Reverse, Park) to confirm the fault code is cleared and the tractor moves correctly.