Case IH 4001 – DV Module: Signal of Aux-stick (AUX1) - out of range low (DV module only)

This code indicates that the voltage signal coming from the primary auxiliary remote joystick (AUX1) has dropped below the minimum acceptable threshold. This typically points to an open circuit, a short to ground in the signal wire, a loss of the 5V reference voltage, or an internal failure of the joystick's potentiometer.

• Maxxum
• Puma
• Magnum
• Steiger

1. 1

   Remove the armrest cover and visually inspect the wiring harness and connector going to the AUX1 joystick for pinched wires, chafing, or loose/corroded pins

2. 2

   Disconnect the joystick, turn the key ON, and verify the joystick is receiving a 5V reference and a solid ground from the DV/ARU module

3. 3

   Test the signal wire between the joystick connector and the DV module for continuity and verify it is not shorted to ground

4. 4

   Use the AFS Pro display or H-routine diagnostic menu to monitor the live voltage of the AUX1 stick. If voltage stays pinned low and wiring tests good, the joystick potentiometer has failed internally

1. 1

   Power Down

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

2. 2

   Access the Joystick

   Remove the retaining screws on the armrest console/Multicontroller to lift the upper trim panel and expose the auxiliary joysticks.

3. 3

   Remove the Faulty Unit

   Disconnect the electrical harness from the AUX1 joystick. Remove the mounting hardware securing the joystick assembly to the armrest bracket.

4. 4

   Install the New Part

   Seat the new Aux-stick into the bracket, secure the mounting hardware, and plug in the electrical connector.

5. 5

   Reassemble

   Reinstall the armrest console trim and reconnect the battery.

6. 6

   Calibration

   Turn the key ON. You must perform a calibration of the auxiliary remote valves via the tractor's display or the H-menu diagnostics so the DV module can learn the new minimum, maximum, and center voltage values of the replacement joystick.