New Holland 4101 – EHR: Rear Remote Valve 1 Invalid Control Message

The control system has detected an invalid or implausible control message from the rear electro-hydraulic remote (EHR) valve number 1. This indicates a communication error between the valve's internal microprocessor and the main controller. It can be caused by electrical signal issues, lost valve calibration (incorrect identification), or internal valve faults, and typically results in the system placing the affected valve into a failsafe mode.

• T7.220
• T7.235
• T7.250
• T7.260
• T7.270
• T6010
• T6060
• T7050

1. 1

   Verify battery and system voltage is above 12.6V and check the main chassis ground strap to rule out voltage-induced communication errors.

2. 2

   Check for other active fault codes (such as 4100, 4102, 4103, 4104/4105, or 4109) that might indicate primary electrical or manual override issues.

3. 3

   Inspect the wiring harness and connectors leading to the No. 1 rear remote valve for damage, corrosion, or loose connections (specifically check the plug located under the cab on the right-hand side above the battery).

4. 4

   Ensure the manual override lever on the valve body is not activated.

5. 5

   Toggle the master hydraulic switch off and on, or restart the tractor to see if the communication fault temporarily resets.

1. 1

   Clear fault codes

   Use the tractor's diagnostic menu or an Electronic Service Tool (EST) to clear stored codes. Operate the valve to determine if 4101 returns immediately as a hard fault.

2. 2

   Perform EHR valve renumbering

   Access the 'HJ' menu on the display to clear existing valve numbers ('CEhr'). Turn key OFF, disconnect all rear remote valves EXCEPT valve #1. Turn key ON and assign the number. Repeat sequentially for each valve, connecting only one at a time to reprogram the stack.

3. 3

   Swap electronic control modules

   Swap the electronic control module from a known working valve (e.g., valve #2) with valve #1. If the fault code moves to the new position, the electronic portion of the valve is faulty. If it remains at valve #1, the issue is in the wiring harness or main controller.

4. 4

   Replace valve assembly

   If the valve module is proven faulty or fails to calibrate, replace the valve assembly. You must perform the EHR Valve Renumbering procedure again after replacement.