Case IH 23 – TMF (Transmission Controller / Armrest Controller) or ATC (Advanced Tractor Control) / CCH (Central Controller Hitch): Two draft pin sensors failed when configured for two draft pins.

The tractor's controller is programmed to receive load/draft signals from two draft sensing pins (located on the rear hitch lower link arms), but it has lost communication or is receiving invalid/out-of-range signals from both sensors simultaneously.

• Magnum
• Magnum 215
• Magnum 235
• Magnum 245
• Magnum 250
• Magnum 255
• Magnum 260
• Magnum 275
• Magnum 280
• Magnum 290
• Magnum 305
• Magnum 310
• Magnum 315
• Magnum 335
• Magnum 340
• MX180
• MX200
• MX210
• MX215
• MX220
• MX230
• MX240
• MX245
• MX255
• MX270
• MX275
• TG Series
• Puma Series

1. 1

   Inspect the draft pin sensors located at the lower link arms of the rear 3-point hitch for obvious physical damage.

2. 2

   Check the wiring harness leading to both draft pin sensors for pinched wires, chafing, or breaks.

3. 3

   Disconnect the sensor connectors and inspect the pins for corrosion, moisture, or pushed-back terminals.

4. 4

   Verify that the sensors are receiving the correct reference voltage from the controller and check the signal return voltage. Heavily suspect a shared wiring issue (like a common ground or shared reference voltage wire break) since both sensors failed simultaneously.

1. 1

   Resolve Wiring Issues

   If the diagnostic checks reveal a broken wire or corroded connector in the hitch harness, repair or replace the affected harness section.

2. 2

   Replace Faulty Sensors

   If the wiring is intact but the sensors test out of specification, remove the faulty draft sensing pins from the lower link arms and install the new replacement pins.

3. 3

   Alternative Bypass (Older Magnums)

   If the tractor is an older Magnum and the draft sensing function is no longer needed or the repair is cost-prohibitive, you can install a 'Draft Load Sensing Pin Elimination Kit.' This bypasses the sensors entirely, disables the draft sensing function, and prevents the controller from throwing the fault code.

4. 4

   Clear Codes and Calibrate

   After replacing the sensors or installing a bypass kit, clear the error codes from the controller. You may need to perform a hydraulic lift autocalibration to ensure the hitch operates normally.