New Holland NH 4114 – Armrest Module (ARU) or Primary Hydraulic Power System: Rear Remote No.2 – No Control Message Received

The tractor's main control system has lost CAN bus communication with the electronic controller (slice) mounted on the second rear hydraulic remote valve. The system is expecting a status or control message from the valve's spool controller, but the signal is missing or timing out.

• T7.220
• T7.235
• T7.250
• T7.260
• T7.270
• T7.175
• T7.300
• T7.315
• T9 Series
• TM 175

1. 1

   Wiring Harness Inspection: Inspect the CAN bus wiring harness running from the tractor's Armrest/Main controller to the rear remote valve block. Look for chafed wires, breaks, or pinch points.

2. 2

   Connector Check: Disconnect the electrical plug at Rear Remote Valve No. 2. Check for pushed-out pins, corrosion, or moisture ingress, which are common causes of communication loss.

3. 3

   Voltage & Ground: Verify that the remote valve slice is receiving proper operating voltage and has a clean ground connection.

4. 4

   System-Wide Check: Check if other rear remotes (No. 1, No. 3, etc.) are throwing similar codes (e.g., 4100, 4128). If multiple valves are offline, the issue is likely a shared power supply, a blown fuse, or a main CAN bus line failure rather than a single faulty valve.

1. 1

   Disconnect Power

   Turn off the tractor and disconnect the battery to protect the electronic modules.

2. 2

   Clean/Repair Connections

   If corrosion or wiring damage was found during the diagnostic checks, clean the contacts with electrical contact cleaner, replace damaged connector pins, or splice/repair the broken CAN wires.

3. 3

   Replace the Valve Slice

   If the wiring, power, and ground are all verified as good, the electronic controller built into the Rear Remote Valve No. 2 slice has internally failed (EEPROM or driver failure). You will need to unbolt the No. 2 slice from the rear hydraulic valve stack and install a replacement.

4. 4

   Recalibrate

   After installing a new electro-hydraulic valve slice, reconnect the battery. You must perform a hydraulic system/remote valve calibration using the tractor's onboard diagnostic menu or a dealer service tool so the Armrest module can recognize and pair with the new valve.