New Holland EHR 4354 – EHR (Electronic Hitch Registry / Electronic Hydraulic Remote) Controller: EHR FB 1 Low Err

Feedback channel 1 for the Electronic Hydraulic Remote (EHR) or Electronic Hitch Registry system is detecting a voltage that is too low. Specifically, the sensor feedback voltage has dropped below the minimum threshold of 0.25 V.

• T4
• T6
• T7
• T8
• T9
• T7.245
• T8.390
• T9.600
• TM115
• TM120
• TM135
• TM150
• TM165
• TM175
• TM190
• 8670
• 8770
• 8870
• 8970

1. 1

   Visually inspect the Tractor Control Unit (TCU) connector (C066) and the implement interface/potentiometer connector (C686).

2. 2

   Ensure connectors are fully seated, undamaged, and pins are in the correct position with a tight fit.

3. 3

   Check the sensor feedback voltage. If reading below 0.25 V, check the harness for a short to ground or an open circuit.

4. 4

   If multiple remotes are present, temporarily swap connections to see if the fault follows the valve/potentiometer or stays with the wiring harness.

1. 1

   Access the EHR Pod/Armrest

   Gain access to the EHR flow control knobs and potentiometers located on the electronic draft control section of the armrest unit.

2. 2

   Repair Wiring (If Applicable)

   If the diagnostic checks revealed a short to a low voltage source or a broken wire in the harness between the TCU and the EHR valve/potentiometer, repair or replace the damaged section of the wiring harness.

3. 3

   Replace the Potentiometer

   If the wiring and connectors are intact, the implement interface (potentiometer) itself has failed internally. Disconnect the faulty potentiometer and install the replacement OEM part.

4. 4

   Reassemble and Calibrate

   Reconnect all harnesses. Turn the tractor on and clear the stored fault codes. You must perform an EHR calibration procedure (hitch/remote valve calibration) via the tractor's display monitor to ensure the new potentiometer is recognized and the spool valves return to neutral correctly.