Case IH 1006 – Armrest Controller: Slip control potentiometer - signal too low (or very low voltage)

This fault code indicates that the control module is receiving a voltage signal from the slip control potentiometer that has fallen below the minimum acceptable threshold. This condition is typically caused by an open circuit, a short to ground in the wiring harness, a disconnected plug, or an internal failure of the potentiometer itself.

• Puma/Mid Range Magnum
• Maxxum
• Farmall
• Case IH Magnum Series: 215, 235, 245, 275, 305, 310, 335, 340
• Case IH Steiger / STX Series: 335, 380, 385, 430, 435, 450, 485, 500, 535
• Case IH Puma Series: 165, 180, 195, 210, 225
• Case IH Maxxum Series: 135, 145, 150

1. 1

   Visual Inspection: Remove the right-hand console/armrest cover and inspect the wiring harness and connector at the slip control potentiometer. Look for disconnected pins, corrosion, or chafed wires.

2. 2

   Voltage Test: With the key ON, check the connector for the proper 5V reference voltage and a good ground supply coming from the Armrest Controller.

3. 3

   Continuity/Short Test: Test the signal wire between the potentiometer and the Armrest Controller for an open circuit or a short to ground.

4. 4

   Component Test: Using a multimeter, measure the resistance sweep of the potentiometer as you turn the dial. If the reading drops out to an open circuit (dead spots) or shows no resistance change, the potentiometer has failed internally.

1. 1

   Turn off the tractor, remove the key, and disconnect the battery to prevent electrical shorts.

   Turn off the tractor, remove the key, and disconnect the battery to prevent electrical shorts.

2. 2

   Remove the retaining screws and lift the cover plate of the right-hand control console or Multicontroller armrest to access the underside of the hitch control panel.

   Remove the retaining screws and lift the cover plate of the right-hand control console or Multicontroller armrest to access the underside of the hitch control panel.

3. 3

   Locate the slip limit control potentiometer (usually grouped with the draft control and hitch position potentiometers).

   Locate the slip limit control potentiometer (usually grouped with the draft control and hitch position potentiometers).

4. 4

   Disconnect the electrical harness plug from the faulty potentiometer.

   Disconnect the electrical harness plug from the faulty potentiometer.

5. 5

   Pull the control knob off the top of the potentiometer shaft.

   Pull the control knob off the top of the potentiometer shaft.

6. 6

   Remove the retaining nut (typically a 3/8-32 nut) securing the potentiometer to the console plate and pull the component out from below.

   Remove the retaining nut (typically a 3/8-32 nut) securing the potentiometer to the console plate and pull the component out from below.

7. 7

   Insert the new OEM potentiometer, secure it with the retaining nut, and press the control knob back onto the shaft.

   Insert the new OEM potentiometer, secure it with the retaining nut, and press the control knob back onto the shaft.

8. 8

   Reconnect the electrical harness plug.

   Reconnect the electrical harness plug.

9. 9

   Reinstall the right-hand console cover.

   Reinstall the right-hand console cover.

10. 10

    Reconnect the battery, turn the key ON, and clear the fault codes. Test the slip control function via the in-cab display (e.g., Pro 700) to ensure the voltage signal is now reading within the normal parameter range.

    Reconnect the battery, turn the key ON, and clear the fault codes. Test the slip control function via the in-cab display (e.g., Pro 700) to ensure the voltage signal is now reading within the normal parameter range.