New Holland 4016 – ARU: Remote Valve Timer Potentiometer 1 Signal Out of Range

The signal from the potentiometer controlling the timer function for the first electro-hydraulic remote (EHR) valve is outside of its expected minimum or maximum voltage range. The Armrest Control Unit (ARU) perceives this as an invalid signal, indicating a potential issue with the signal integrity, the wiring harness, or the potentiometer component itself, which is located in the remote valve control lever on the operator's armrest.

• T6000 Series
• T6030
• T7000 Series
• T7030
• T7040
• T7050
• T7060
• T7 Series
• T7.210
• T7.235
• T7.250
• T7.260
• T7.270
• TG Series
• TG210
• TG230
• TG255
• TG285
• TM Series

1. 1

   Check the tractor's diagnostic display for other active fault codes. Multiple 'out of range' or communication faults could indicate a systemic issue, such as low supply voltage to the armrest controller.

2. 2

   Visually inspect the wiring harness leading to and underneath the armrest console for signs of damage, chafing, or corrosion. Ensure the wiring has enough slack to move freely with the operator's seat.

3. 3

   Inspect the connectors for the armrest controller, looking specifically for loose or corroded pins.

4. 4

   Disconnect the potentiometer and test total resistance across the two outer terminals using a multimeter set to Ohms (should be close to the component's rated specification, e.g., 10kΩ).

5. 5

   Test the potentiometer's sweep by measuring resistance between the center terminal (wiper) and one outer terminal while slowly moving the control lever. The reading should change smoothly; erratic readings, sudden jumps, or an open circuit indicate a faulty potentiometer.

1. 1

   Access the armrest components

   Remove the screws holding the upper and lower plastic trim pieces of the armrest console together to access the remote valve levers and potentiometers. Exercise caution, as the plastic may be brittle on older, high-hour machines.

2. 2

   Replace faulty component

   If the potentiometer failed the multimeter test, replace it. Note that it is common for the potentiometer to be integrated into the control lever assembly, which may require replacing the entire lever.

3. 3

   Prepare for calibration

   Park the tractor on level ground, engage the parking brake, disconnect any implements from the rear remote valves, and ensure the hydraulic oil is at operating temperature.

4. 4

   Enter diagnostic mode

   Connect a diagnostic tool or jumper (e.g., Part No. 380000843) to the diagnostic socket located behind a side panel in the cab. Turn the key to the 'ON' position. The instrument cluster should display 'HH' or similar to indicate the 'H' menu is active.

5. 5

   Calibrate the EHR valve

   Navigate to the H1 menu using the instrument cluster keys and select the rear EHR symbol (display will show 'CAL'). Press the program switch for lever #1 three times in quick succession. Follow the display prompts: when '2' is displayed, move the lever to full raise; when '3' is displayed, move to full flow lower; when '4' is displayed, move to float. The program light for the corresponding EHR will illuminate as each position is registered.

6. 6

   Save calibration and test

   Once the sequence for the first valve is complete, the system will either end or prompt you to continue with the next valve. Turn the key to the 'OFF' position and wait at least 10 seconds to allow the controller to store the new values. Remove the diagnostic connector, start the tractor, and test the remote valve function.