New Holland NH 4176 – EHR Control Module: Timer Switch No.1 / No.2 not connected

The controller has detected an open circuit, disconnection, or failure in the timer switch circuit responsible for controlling the #1 and #2 Electronic Hydraulic Remote (EHR) valves.

• T6000 Series
• T6010
• T6020
• T6030
• T6040
• T6050
• T6060
• T6070
• T7000 Series
• T7030
• T7040
• T7050
• T7060
• T6 Series
• T7 Series
• T8 Series
• T9 Series
• MXM Series
• TM Series
• Genesis Series
• 8670
• 8770
• 8870
• 8970

1. 1

   Access the armrest control panel and visually inspect the wiring harness and connectors between the EHR timer switch No.1 / No.2 and the Armrest Controller for unplugged connectors, damaged pins, or chafed wires.

2. 2

   Test the timer switch for continuity using a multimeter to ensure the switch contacts are closing properly when depressed.

3. 3

   Verify that the EHR module is receiving the correct reference voltage and that the CAN-BUS communication is intact to rule out broader communication failures.

1. 1

   Disconnect Power

   Disconnect the tractor's battery to prevent short circuits.

2. 2

   Access the Switch

   Remove the necessary trim panels on the armrest console to access the underside of the EHR control levers and timer switches.

3. 3

   Repair/Replace

   Reconnect the switch if it has simply vibrated loose. If the switch failed the continuity test, remove the retaining clips/screws, unplug the pigtail, and install a new timer switch.

4. 4

   Reassemble

   Reinstall the armrest trim and reconnect the battery.

5. 5

   Recalibration

   Turn the key to the ON position (do not start the engine). Depress the timer switch for remote valve No.1, then within 5 seconds, depress the timer switch for valve No.2. The display will show 'FEhr' and then default to a valve (e.g., 'Ehr4'). When the last valve has been recognized by the system, pulse the No.1 EHR Valve timer switch 3 times in quick succession. The display will show 3, 2, 1, and then END. Turn the key start switch OFF to store the programming.