Case IH 5 0 – Hitch Controller (EDC - Electronic Draft Control ECU) or Armrest Controller: Left load pin failed

Indicates a failure in the left draft load sensing pin. The controller has detected that the signal voltage from the left pin is out of the specified range, typically caused by an open circuit, a short circuit to ground/power, or an internal failure of the sensor itself.

• MX Maxxum
• 7200/8900 series Magnum
• Magnum 7110
• Magnum 7120
• Magnum 7130
• Magnum 7140
• Magnum 7150
• Magnum 7210
• Magnum 7220
• Magnum 7230
• Magnum 7240
• Magnum 7250
• Magnum 8910
• Magnum 8920
• Magnum 8930
• Magnum 8940
• Magnum 8950
• MX80C
• MX90C
• MX100
• MX100C
• MX110
• MX120
• MX135
• MX150
• MX170
• Steiger 9110
• Steiger 9130
• Steiger 9210
• Steiger 9230
• Steiger 9240
• Steiger 9250
• Steiger 9260
• Steiger 9310
• Steiger 9330
• Steiger 9350
• CX50
• CX60
• CX70
• CX80
• CX90
• CX100

1. 1

   Inspect the wiring harness and the plastic weather connector going to the left load pin for physical damage, corrosion, or loose connections.

2. 2

   Test the wiring harness for continuity from the pin connector back to the Hitch ECU. Check for a short to ground or a short to the reference voltage.

3. 3

   Test the resistance of the load pin itself across its terminals to verify if the internal strain gauge has failed (an open circuit is the most common failure).

4. 4

   Attempt to clear the hitch fault codes and run a hitch calibration cycle. If the sensor has failed, the calibration will abort and the code will return.

1. 1

   Relieve Tension

   Lower the 3-point hitch completely to the ground to relieve all physical tension and hydraulic pressure on the lower link arms.

2. 2

   Disconnect Wiring

   Unplug the electrical connector from the left draft load sensing pin.

3. 3

   Remove the Pin

   Remove the retaining bolt or snap ring securing the load pin to the lower link bracket. Support the heavy lower link arm and slide the old load pin out.

4. 4

   Install the New Part

   Clean the bore and insert the new load pin. Ensure that any alignment flats or notches are positioned correctly so the sensor measures the draft force in the proper direction.

5. 5

   Reassemble

   Reinstall the retaining hardware and plug the electrical connector back in.

6. 6

   Calibrate the Hitch

   You must perform a Hitch Calibration procedure using the tractor's display or diagnostic tool. This maps the new sensor's zero-load voltage to the Hitch ECU. The hitch will not operate correctly until this calibration is successfully completed.