Case IH 22 – TMF (Tractor Multi-Function) controller: Single draft pin sensor failed when configured for one draft pin sensor

The system has detected a failure (such as an open circuit, short circuit, or out-of-range voltage) in the draft sensing pin circuit on a tractor configured to use only one draft pin for its 3-point hitch draft control system.

• Magnum
• Case IH Magnum Series (215, 235, 245, 250, 255, 275, 280, 290, 305, 310, 315, 335, 340)
• Case IH MX / TG Series (MX180, MX200, MX210, MX220, MX240, MX255, MX270, MX285)
• Older Case IH Magnum Series (7100, 7200, and 8900 series)

1. 1

   Inspect the wiring harness leading to the draft pin sensor for continuity, damaged wires, open circuits, or shorts to ground/power (+12 Volts)

2. 2

   Test the signal voltage of the draft pin sensor to see if it is reading too high or too low

3. 3

   Test the resistance of the draft pin sensor across its pins (e.g., Pin A to Pin C, Pin B to Pin C) to verify it is within the specified ohm range

4. 4

   Verify that the central controller (TMF/XCM) is outputting the correct reference voltage to the sensor

1. 1

   Disconnect power

   Disconnect the battery or power down the tractor to ensure safety while working on the electrical system.

2. 2

   Locate sensor

   Locate the faulty draft pin sensor on the lower links of the 3-point hitch.

3. 3

   Inspect connector

   Disconnect the sensor's electrical connector and inspect for corrosion, moisture, or bent pins. Clean or repair the connector if necessary.

4. 4

   Repair harness

   If the wiring harness is damaged, repair the broken wires or replace the harness section.

5. 5

   Replace sensor

   If the harness tests fine but the sensor fails the resistance/voltage test, remove the faulty draft pin sensor and install a new OEM replacement pin.

6. 6

   Install bypass kit (optional)

   Alternative Bypass (Older Models): If you are working on an older Magnum (e.g., 7100, 7200, 8900, or MX series) and no longer need the draft sensing function, you can install a 'Draft Load Sensing Pin Elimination Kit.' This plugs into the harness to bypass the system, disabling the electronic draft control while allowing normal up/down function of the 3-point hitch without throwing codes.

7. 7

   Test system

   Reconnect the battery, clear the error codes from the TMF/Armrest controller, and test the hitch system for normal operation.