Case IH 1017 - UCM – UCM: Left-hand load sensing pin - signal too high

The voltage signal returning from the left-hand draft load sensing pin (located on the 3-point hitch lower link) is exceeding the maximum expected threshold. This usually points to a short to power (+12V) in the signal wire, an open circuit on the sensor's ground wire, or an internal failure of the load sensing pin itself.

• VESTRUM CVX
• Puma 140
• Puma 165
• Puma 180
• Puma 195
• Puma 210
• Puma 225
• Magnum 7100
• Magnum 7200
• Magnum 8900
• Magnum 7110
• Magnum 7240
• Magnum 8950
• MX Magnum MX100
• MX Magnum MX170
• MX Magnum MX210
• MX Magnum MX285
• Magnum 215
• Magnum 380
• Steiger Series

1. 1

   Check the left-hand load sensing pin connector at the rear hitch for moisture, dirt, or corrosion, which can bridge pins and cause high voltage readings.

2. 2

   Inspect the chassis harness between the UCM and the left-hand pin. Look for pinched wires causing a short to a 12V power source, or a broken ground wire (an open ground will cause the sensor signal to default high).

3. 3

   Verify that the sensor is receiving its proper 8V reference voltage (a faulty 8V reference usually triggers companion codes 1019 or 1020).

4. 4

   Temporarily swap the left and right load sensing pin connectors. If the code changes to 1015 (Right-hand load sensing pin - signal too high), the pin itself has failed internally.

1. 1

   Disconnect battery

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

2. 2

   Locate load sensing pin

   Locate the left-hand draft load sensing pin on the lower 3-point hitch linkage.

3. 3

   Disconnect harness

   Disconnect the electrical harness from the pin.

4. 4

   Remove retaining hardware

   Support the lower lift arm and remove the retaining bolt/hardware holding the load sensing pin in place.

5. 5

   Remove defective pin

   Drive the defective pin out of the linkage.

6. 6

   Option A (Replacement)

   Install the new OEM load sensing pin and secure it with the retaining hardware.

7. 7

   Option B (Elimination Kit)

   If installing a Draft Load Sensing Pin Elimination Kit, plug the electronic bypass modules directly into the factory wiring harness connectors and secure them to the chassis with tie-wraps. This permanently disables draft sensing and prevents the UCM from throwing the 1017 code.

8. 8

   Reconnect battery

   Reconnect the battery.

9. 9

   Perform calibration

   If you replaced the pin with a functional unit, you must perform the Hydraulic Lift Calibration procedure (often prompted by fault code 1024) to teach the UCM the new sensor's baseline values.