New Holland 4103 – AUX/ARM: Rear Remote Control Valve No. 1 - Failsafe Activation

The auxiliary or armrest control module (AUX/ARM) has placed the number 1 rear electro-hydraulic remote (EHR) valve into a failsafe mode. This occurs because the controller is not receiving a command to shift to neutral when power is applied, meaning it cannot confirm the valve spool is in the neutral position at startup. This protective measure disables the valve to prevent unpredictable behavior or damage.

• T6
• T7
• T8
• TM115
• TM125
• TS-A
• TL-A

1. 1

   Review the tractor's fault code history for other active codes (e.g., 4040/4041 for supply voltage, 4042 for CAN bus, 4111 for potentiometer faults)

2. 2

   Check battery voltage and charging system, as low voltage can trigger multiple ghost codes

3. 3

   Inspect the wiring harness and connectors leading to the number 1 remote valve (often located under the cab, above the battery box) for damage, corrosion, or loose pins

4. 4

   Test the control potentiometer linked to the control lever or paddle in the cab for incorrect or out-of-range signals

5. 5

   Check if the valve spool moves freely to rule out manual operation (indicated by code 4109) or a mechanically stuck valve

6. 6

   Assess general hydraulic system performance for sluggishness, which could point to a sticking compensator valve on the main hydraulic pump

1. 1

   Address electrical issues

   Repair or replace any damaged wiring or connectors found during inspection. Ensure all connections are clean and secure.

2. 2

   Restart the tractor

   Shut the tractor down completely, wait a few minutes, and restart to see if intermittent electrical faults clear.

3. 3

   Calibrate the remotes

   If a potentiometer or controller has been replaced, perform a calibration procedure through the tractor's display or with a dealer service tool.

4. 4

   Replace the potentiometer

   If the potentiometer is identified as the fault (e.g., via code 4111), replace the component located within the armrest control unit.

5. 5

   Inspect and service the valve assembly

   If the valve spool is sticking, remove and service the valve block (clean and check O-rings/seals). If the internal solenoid is faulty, replace the solenoid or the entire valve slice for that remote.