Case IH 1015 - UCM – UCM: Right-hand load sensing pin - signal too high

The load sensing pins (draft pins) are electronic sensors located at the lower link arms of the rear 3-point hitch. They measure the draft (pulling force) exerted by an implement. A "signal too high" condition means the voltage returning from the right-hand sensor to the controller is exceeding the normal operating range. This typically indicates a short circuit to power (+Ve voltage) in the wiring harness, or an internal failure of the sensor itself.

• VESTRUM CVX
• Puma Series: 115, 125, 140, 155, 165, 180, 195, 210, 225 (including CVT/CVX models)
• Magnum Series: 215, 245, 275, 305, 7100, 7200, and 8900 series
• MX Series: MX100 through MX170, MX210, MX230, MX255, MX285
• Steiger Series

1. 1

   Visual Inspection: Inspect the wiring harness and connector at the right-hand draft pin for physical damage, packed dirt, or corrosion.

2. 2

   Harness Testing: Test the wire harness for damaged wires or a short circuit to power. Disconnect the sensor and check the signal wire voltage with a multimeter.

3. 3

   Swap Test: If the harness allows, temporarily swap the left and right pin connectors. If the fault code changes to the left side (Code 1017: Left hand load sensing pin - signal too high), the pin itself is faulty. If the code remains 1015, the issue is in the wiring harness or the UCM.

1. 1

   Lower 3-point hitch

   Lower the 3-point hitch to the ground to remove all tension and weight from the lower link arms.

2. 2

   Disconnect battery

   Turn off the tractor and disconnect the battery to protect the UCM.

3. 3

   Disconnect electrical connector

   Disconnect the electrical connector from the right-hand draft load sensing pin.

4. 4

   Remove retaining hardware

   Remove the retaining hardware (usually a locking bolt, snap ring, or retaining pin) securing the draft pin to the tractor chassis/hitch assembly.

5. 5

   Remove faulty draft pin

   Support the lower link arm and slide the faulty draft pin out.

6. 6

   Install new draft pin

   Clean the bore. Insert the new draft pin, ensuring it is oriented correctly (many pins have a flat spot or alignment mark that must face a specific direction for accurate force measurement).

7. 7

   Reinstall hardware and reconnect harness

   Reinstall the retaining hardware and reconnect the electrical harness.

8. 8

   Perform calibration

   Power on the tractor, clear the fault codes, and perform a hydraulic lift/draft calibration via the UCM as outlined in the service manual.

9. 9

   Install Draft Pin Elimination Kit (Alternative)

   Option B: If the tractor is used for tasks that do not require draft sensing (e.g., PTO work, drawbar pulling), install a Draft Load Sensing Pin Elimination Kit. This kit plugs directly into the factory harness, bypassing the pins and sending a fixed "normal" signal to the UCM to permanently clear the fault codes and disable draft sensing.