Case IH 4011 – DV Module / ARU: Signal from Remote Flow potentiometer 3 (AUX 3) out of range (DV module only)

The signal voltage coming from the rotary potentiometer used to set the hydraulic flow rate for the 3rd auxiliary remote valve (AUX 3) is outside of its acceptable calibrated parameters.

• Maxxum
• Case IH Magnum
• Case IH Puma
• Case IH Steiger

1. 1

   Inspect the wiring harness and connector at the AUX 3 flow potentiometer on the armrest console for physical damage, corrosion, or loose pins

2. 2

   Verify that the potentiometer is receiving the correct reference voltage (typically 5V) from the ARU/DV module

3. 3

   Check the signal wire for continuity between the potentiometer and the ARU/DV module, ensuring it is not shorted to ground or power

4. 4

   Perform a sweep test using a multimeter to measure the resistance or voltage output of the potentiometer while slowly turning the dial, looking for erratic jumps, dropouts, or dead spots

5. 5

   Check if the armrest controller has lost its calibration; a simple re-calibration via the tractor's display monitor can sometimes resolve out-of-range errors

1. 1

   Power Down

   Turn off the tractor and disconnect the battery to prevent electrical shorts during disassembly.

2. 2

   Access the Armrest

   Remove the retaining screws and carefully lift the top cover of the armrest control console to expose the underside of the remote valve controls.

3. 3

   Disconnect

   Locate the AUX 3 flow potentiometer (usually aligned with the 3rd remote lever/switch) and disconnect its electrical wiring harness.

4. 4

   Remove

   Remove the retaining nut or mounting screws holding the potentiometer to the console housing and pull the faulty sensor out.

5. 5

   Install

   Insert the new potentiometer, secure it with the mounting hardware, and reattach the control knob.

6. 6

   Reassemble

   Reconnect the electrical harness, carefully route the wiring to prevent pinching, and reinstall the armrest cover.

7. 7

   Recalibrate

   Reconnect the battery, turn the key on, and enter the tractor's diagnostic/calibration menu. Perform the electro-hydraulic remote valve and armrest calibration procedure to teach the module the new potentiometer's minimum and maximum voltage values.