New Holland 4101 – EHR Valve: Rear Remote No. 1 Unreliable Message

The control module for the #1 rear remote electro-hydraulic valve (EHR) is not receiving proper commands over the CAN bus from the armrest controller (ARU). The control message is considered unreliable or has been lost entirely, leading to a communication failure between the operator's control and the hydraulic valve, which can result in the remote valve being inoperative.

• T6010
• T6020
• T6030
• T6040
• T6050
• T6060
• T6070
• T6080
• T6090
• T6.120
• T6.140
• T6.145
• T6.150
• T6.155
• T6.160
• T6.165
• T6.175
• T7.170
• T7.185
• T7.200
• T7.210
• T7.220
• T7.235
• T7.250
• T7.260
• T7.270
• T7.290
• T7.315
• T7030
• T7040
• T7050
• T7060
• T7070

1. 1

   Visually inspect the wiring harness between the armrest controller and the stack of rear remote valves for chafing, pinching, or corrosion.

2. 2

   Check the electrical connectors at both the armrest controller and the #1 EHR valve for bent pins, corrosion, or moisture intrusion.

3. 3

   Perform CAN Bus Electrical Check (Power OFF): Turn the tractor's ignition and battery disconnect off. Locate a CAN bus diagnostic port or unplug the connector at the #1 EHR valve. Measure resistance between CAN High (CAN_H) and CAN Low (CAN_L) wires. A healthy bus reads ~60 Ohms. ~120 Ohms indicates a missing termination resistor or wire break; significantly less than 60 Ohms (e.g., 0-40 Ohms) suggests a short or faulty electronic component.

4. 4

   Perform CAN Bus Electrical Check (Power ON): Turn the tractor's ignition on (engine off). Measure DC voltage of CAN lines relative to a good chassis ground. CAN_H should be 2.5V-3.0V; CAN_L should be 2.0V-2.5V. Deviations indicate a short to power/ground or a faulty transceiver.

5. 5

   Isolate the fault by disconnecting other EHR valves from the harness one by one and re-checking resistance and voltage to see if readings return to normal.

1. 1

   Repair wiring and connectors

   Address any wiring or connector issues found during the diagnostic checks. Repair or replace the harness if chafing, shorts, or breaks are identified.

2. 2

   Isolate and test the valve

   If wiring is confirmed good but CAN bus readings are incorrect, disconnect the #1 remote valve. If the rest of the network returns to normal operation, the #1 valve section or its solenoid is the likely culprit.

3. 3

   Replace faulty component

   If diagnostics point to a faulty solenoid, replace it. If the entire valve section's internal electronics are suspected, replace the complete valve slice for remote #1.

4. 4

   Clear valve numbers

   If the EHR valve was replaced, access the 'HJ' menu on the tractor's display with all valves connected. Select the rear EHR subsystem ('EEhr') and press and hold the dimming button until the display shows 'CEhr' to clear existing valve numbers.

5. 5

   Renumber and calibrate valves

   Turn the key off. Disconnect all rear remote valves except #1. Turn the key on, navigate to the HJ menu, and wait for the display to show 'Ehr1'. Turn the key off, reconnect the #2 valve, turn the key on, and wait for recognition (an audible beep should confirm each successful recognition). Repeat this sequence in the correct order for all remaining valves, then turn the key off to store the new configuration.