Case IH S 1 – Hitch Controller / Electronic Draft Control (EDC) module: Right load pin failed

The hitch controller has detected that the voltage from the right draft pin sensor is outside the normal operating range, meaning the sensor has failed or there is a wiring issue.

• 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
• Steiger 9110
• Steiger 9130
• Steiger 9150
• Steiger 9210
• Steiger 9230
• Steiger 9240
• Steiger 9250
• Steiger 9260
• Steiger 9310
• Steiger 9330
• Steiger 9350
• Maxxum MX80C
• Maxxum MX90C
• Maxxum MX100
• Maxxum MX110
• Maxxum MX120
• Maxxum MX135
• Maxxum MX150
• Maxxum MX170
• CX50
• CX60
• CX70
• CX80
• CX90
• CX100

1. 1

   Inspect the wiring harness leading to the right draft pin at the rear of the tractor for rubbed, broken, or rodent-chewed wires

2. 2

   Ensure the connector at the draft pin is clean, tight, and free of corrosion or moisture

3. 3

   Back-probe the sensor to verify if the voltage is actually out of range (confirming a dead sensor) or if the controller is missing the 8V reference voltage entirely

1. 1

   Lower the 3-point hitch

   Option A (If draft sensing is required): Lower the 3-point hitch to the ground to relieve all pressure and weight from the linkage.

2. 2

   Disconnect the electrical harness

   Disconnect the electrical harness from the right draft pin.

3. 3

   Remove the retaining hardware

   Remove the retaining hardware holding the right draft pin in the lower hitch link.

4. 4

   Slide the defective draft pin out

   Slide the defective draft pin out.

5. 5

   Install the new draft pin

   Install the new draft pin, secure the retaining hardware, and plug in the electrical connector.

6. 6

   Cycle the tractor key

   Cycle the tractor key to clear the code and test the hitch operation.

7. 7

   Locate the electrical connectors

   Option B (If draft sensing is NOT used): Locate the electrical connectors for both the left and right draft pins at the rear of the tractor.

8. 8

   Unplug the harnesses

   Unplug the harnesses from both draft pins.

9. 9

   Plug in the elimination modules

   Plug the two electronic load sensing elimination modules (dummy plugs) into the tractor's wiring harness.

10. 10

    Secure the modules and wiring

    Secure the modules and wiring out of the way using zip ties.

11. 11

    Verify hitch operation

    The diagnostic system will no longer detect the pins, the 'S 1' code will clear, and the 3-point hitch will function normally in standard position-control mode.