Case IH 4010 – DV Module: Signal of Aux-stick (AUX3) - out of range high (DV module only)

This code indicates that the voltage signal coming from the 3rd auxiliary remote valve lever (AUX3 stick) potentiometer is higher than the expected maximum threshold. This typically points to a short to power (12V or 5V), an open ground circuit in the wiring harness, or an internal failure of the potentiometer inside the joystick/lever.

• Maxxum
• Puma
• Magnum
• Steiger

1. 1

   Remove the armrest console cover and visually inspect the wiring harness and connectors between the AUX3 stick and the Armrest Controller (DV module) for pinched wires, corrosion, or loose pins.

2. 2

   Verify that the AUX3 potentiometer is receiving the correct 5V reference voltage and has a solid ground connection from the controller (an open ground will cause the signal voltage to default high).

3. 3

   Measure the signal wire voltage while moving the AUX3 lever. If the voltage is stuck high (e.g., at 5V or 12V) regardless of lever position, check the signal wire for a short to power.

4. 4

   Test the resistance of the AUX3 potentiometer (sweep test). If the resistance is out of specification or shows an open circuit, the lever assembly is faulty.

1. 1

   Disconnect Power

   Turn off the tractor and disconnect the battery to prevent electrical spikes.

2. 2

   Access the Armrest

   Carefully remove the screws securing the armrest console cover to expose the auxiliary remote levers and the Armrest Controller.

3. 3

   Disconnect the AUX3 Lever

   Locate the 3rd auxiliary remote lever (AUX3) and disconnect its electrical connector.

4. 4

   Repair or Replace

   If the diagnostic checks revealed damaged wiring, repair the harness and replace any corroded connector pins. If the potentiometer failed the sweep test, remove the mounting hardware for the AUX3 lever and install a new lever/potentiometer assembly. (Note: On some models, the potentiometers are integrated into a single joystick or armrest module block and cannot be serviced individually).

5. 5

   Reassembly

   Reconnect the electrical connector and reinstall the armrest console cover.

6. 6

   Calibration

   Reconnect the battery. Turn the key on and clear the fault codes. You will likely need to navigate to the tractor's H2/HH calibration menu (or use the dealer diagnostic tool) to perform a joystick/armrest calibration so the controller learns the new potentiometer's neutral, minimum, and maximum voltage limits.