New Holland EHR 4166 – EHR (Electronic Hydraulic Remote) Controller: Rear Remote No.5 - Output Stage Faulty

An electrical failure in the output stage circuit that drives the 5th rear electro-hydraulic remote valve. The system has detected that the driver circuit (inside the controller) or the solenoid coil circuit for this specific remote valve is either shorted, open, or experiencing a voltage irregularity.

• New Holland T9.390
• New Holland T9.450
• New Holland T9.505
• New Holland T9.560
• New Holland T9.615
• New Holland T9.670
• New Holland T8.xxx
• New Holland T7.170
• New Holland T7.185
• New Holland T7.200
• New Holland T7.210
• New Holland T7030
• New Holland T7040
• New Holland T7050
• New Holland T7060
• New Holland T6.120 to T6.180
• New Holland T6010 to T6095
• New Holland TS100A
• New Holland TS110A
• New Holland TS115A
• New Holland TS125A
• New Holland TS135A

1. 1

   Inspect the wiring harness and the 4-pin electrical connectors running from the EHR controller to the #5 rear remote valve for chafed wires, corrosion, open circuits, or shorts to ground/power.

2. 2

   Measure the resistance of the solenoid coil on the #5 remote valve to ensure it is within specification and not internally shorted or open.

3. 3

   Swap the electrical connection or the solenoid from the #5 remote valve with a known good remote (such as #4). If the fault code changes to the #4 valve, the solenoid/valve is faulty. If the code remains EHR 4166, the issue is in the wiring harness or the EHR controller itself.

4. 4

   Verify that the EHR controller/Armrest module is sending the correct output voltage to the valve pins when the #5 remote is commanded.

1. 1

   Resolve Electrical Faults

   If the diagnostic checks reveal a damaged harness, repair the broken wires or replace the EHR control valve wire harness.

2. 2

   Replace the Valve/Solenoid

   If the valve's output stage/solenoid is internally shorted or defective, remove the #5 electro-hydraulic remote valve section (slice) and install a replacement.

3. 3

   Address Assignment

   If a new CAN-based EHR valve is installed, the correct CAN address must be assigned to it via the tractor's display before it will function properly.

4. 4

   Valve Calibration

   After replacing the valve, you must calibrate it using the tractor's monitor/display. Navigate to the remote valve calibration menu, select the #5 valve, and initiate the process.

5. 5

   Clear Debris (If Calibration Fails)

   If the calibration fails the first time, manually stroke the valve back and forth to clear any hydraulic debris, then attempt the calibration again.