Case IH 67 – Transmission Controller (TRANS): Forward switch input from the FNRP Pod is shorted to +12 Volts or the FNRP pod 5 Volt Reference

The FNRP Pod Forward switch is shorted to power, indicating a short to +12 Volts or the 5 Volt reference in the forward switch input circuit.

• MX Magnum
• STX Steiger
• Case IH STX Steiger series (e.g., STX 325, 435, 535)
• Case IH MX Magnum series
• Case IH Magnum 235 - 340 (Series 4)
• Case IH Quadtrac series

1. 1

   Check for companion codes: Determine if fault code 69 (FNRP Pod Reverse switch is shorted to power) is also active.

2. 2

   If Code 67 is accompanied by Code 69 (5-Volt supply circuit failure): Check the wiring between Pin 8 of connector C051 and pin 16 of connector C027 for a short to power.

3. 3

   If Code 67 is active WITHOUT Code 69 (Forward circuit failure): Check the wiring between Pin 6 of connector C051 and pin 13 of connector C027 for a short to power.

4. 4

   Visually inspect the connectors for bent pins, loose connections, or rubbed-through wire insulation that could be introducing +12V or 5V reference voltage into the forward switch signal wire.

1. 1

   Disconnect battery

   Disconnect battery power before servicing the transmission control assembly.

2. 2

   Access FNRP shuttle lever

   Access the steering column or armrest console where the FNRP shuttle lever is mounted.

3. 3

   Disconnect connectors

   Disconnect connectors C051 and C027 to isolate the FNRP pod wiring harness.

4. 4

   Test forward switch circuit

   Using a multimeter, test the forward switch circuit (Pin 6 to Pin 13) for continuity to any 12V power source or the 5V reference line.

5. 5

   Repair or replace wiring

   Repair any damaged wiring or replace the harness if a short is found.

6. 6

   Replace FNRP switch or shuttle lever

   If the wiring harness tests good, the internal contacts of the FNRP switch/lever assembly have failed and are shorting internally. Replace the FNRP switch or the entire shuttle lever assembly.

7. 7

   Reassemble and verify

   Reassemble the pod housings, reconnect the battery, and clear the transmission fault codes to verify the repair.