New Holland 4101 – ARU: Remote No.1 Control Message Not Plausible

The Armrest Controller (ARU) has detected a communication problem with the number 1 rear electronic hydraulic remote valve. The control message received from the remote unit is outside the expected range or inconsistent with other system information, indicating a potential issue with communication or signal integrity. This can be caused by an electrical fault within the valve's internal components, wiring issues between the valve and the controller, or a malfunction of the controller itself.

• T7.170
• T7.185
• T7.210
• T7.225
• T7.235
• T7.250
• T7.260

1. 1

   Check for other active fault codes, particularly those related to the CAN bus, power supply (under/over voltage), or other remote valves.

2. 2

   Check battery voltage and ensure all main ground connections to the chassis are clean and tight to rule out 'ghost' communication codes.

3. 3

   Visually inspect the wiring harness and connectors between the armrest controller and the number 1 remote valve for damage, corrosion, or loose connections.

4. 4

   Perform a CAN bus integrity check: measure resistance between CAN high and CAN low (should be approx 60 ohms with power off), and check voltages (CAN high 2.5-3.0V, CAN low 2.0-2.5V with key on).

5. 5

   Test the remote valve potentiometer for a fixed resistance across outer terminals and smooth resistance changes on the center wiper terminal while moving the lever or valve.

6. 6

   Test the remote valve solenoid resistance (typically between 6 and 8 ohms).

1. 1

   Address related fault codes

   Resolve any other active fault codes first, especially those related to power supply or general CAN bus communication issues.

2. 2

   Repair wiring and connectors

   Repair any wiring or connector issues found during the visual inspection. Ensure all connections are clean and secure.

3. 3

   Calibrate remote valve

   Perform a remote valve calibration using a specialized diagnostic tool, as a loss of calibration can sometimes cause communication errors.

4. 4

   Replace faulty valve components

   If diagnostic checks point to a faulty potentiometer or solenoid, and they are available separately, replace the specific faulty component.

5. 5

   Replace remote valve assembly

   If individual components are not available or the entire valve is determined to be faulty, replace the complete electro-hydraulic remote valve assembly.

6. 6

   Calibrate new valve

   After replacing the valve assembly, perform a calibration of the new valve to ensure it functions correctly with the tractor's control system.