Case IH NH4010 – ARU: Auxiliary Stick Signal Out of Range High

The Armrest Control Unit (ARU) has detected a voltage signal from the auxiliary joystick for the third remote valve (AUX3) that exceeds the expected maximum threshold. This out-of-range high signal indicates a potential short circuit to a power source, a faulty sensor potentiometer within the joystick, or compromised signal integrity in the wiring harness.

• Puma 115
• Puma 125
• Puma 130
• Puma 140
• Puma 145
• Puma 155
• Puma 160
• Puma 165
• Puma 180
• Puma 195
• Puma 210
• T6000
• Maxxum

1. 1

   Visually inspect the wiring harness and connectors leading to the armrest and the AUX3 joystick for pinched, chafed, or melted wires, and corrosion

2. 2

   Determine if the fault is constant or intermittent to help isolate wiring versus component failure

3. 3

   Access the 'HH' diagnostic menu through the instrument cluster to observe real-time data from the AUX3 joystick (look for an abnormally high and static reading)

4. 4

   Disconnect the joystick and measure the resistance of the potentiometer across its terminals while operating the lever (resistance should change smoothly)

5. 5

   Test the signal wire for voltage to check for a short to a power source (e.g., reading close to 5V or 12V reference)

6. 6

   Check for continuity and short circuits in the harness between the joystick and the armrest control unit

1. 1

   Isolate the fault

   Use the diagnostic checks to determine if the root cause lies with the joystick component, the wiring harness, or the Armrest Control Unit (ARU).

2. 2

   Repair wiring

   If damaged wiring or corroded connectors are found, repair or replace them. Ensure all connections are clean and secure.

3. 3

   Replace joystick assembly

   If the joystick potentiometer fails the resistance test, replace the joystick assembly. This typically involves disassembling parts of the armrest.

4. 4

   Calibrate the new component

   After replacing the joystick or repairing the circuit, perform a calibration through the 'HH' diagnostic menu. Consult the official service manual for the exact auxiliary remote valve calibration procedure.

5. 5

   Clear fault codes

   Clear the stored fault codes using the 'HH' menu or a compatible diagnostic tool.

6. 6

   Verify repair

   Operate the AUX3 joystick and monitor the system to ensure the fault code does not return.