New Holland 106 – TMF: Aux 5th Remote Extend Switch Failure

The Total Machine Fault (TMF) controller has detected a malfunction within the armrest control unit, specifically with the switch responsible for controlling the 'extend' function of the 5th auxiliary hydraulic remote valve. This fault indicates an electrical failure such as an open circuit, a short circuit, or a physically stuck switch, which prevents the remote valve from operating correctly.

• T7 Series
• T7.190
• T7.235
• T7000 Series

1. 1

   Carefully visually inspect the wiring harness leading to and within the armrest controller for pinched, chafed, or broken wires (especially internal wire breakage near connectors)

2. 2

   Disconnect and inspect the electrical connectors related to the armrest controller for corrosion, bent pins, or loose connections, then re-seat them

3. 3

   Perform the H5 Switch Operation Test routine via the tractor's diagnostic system to verify if the 5th remote extend switch registers when operated

4. 4

   Check for other active fault codes; multiple communication or voltage-related codes could indicate a broader electrical issue (e.g., battery or grounding) rather than a single failed switch

1. 1

   Confirm the failure

   Use the H5 diagnostic routine and wiring checks to confirm that the switch itself is the point of failure and rule out wiring or connector issues.

2. 2

   Isolate the faulty component

   Disassemble the armrest control panel to identify the specific electronic module or printed circuit board that houses the faulty switch.

3. 3

   Replace the component

   Replace the affected printed circuit board or the entire armrest control module. The individual switch is typically integrated and not serviceable separately.

4. 4

   Calibrate the system

   After installing the new component in the armrest controller, perform a calibration of the new component through the tractor's diagnostic menu.