New Holland 1069 – ARM / DCU: EDC Raise/Work Switch Failure

The HITCH Electronic Draft Control (EDC) system has detected a malfunction related to a failure of the Raise/Work switch. The control module has detected an invalid or missing signal from this switch, which is typically integrated into the 'EDC mouse' located on the armrest. This issue directly affects the proper operation of the tractor's three-point hitch control system.

• T7
• T8
• T9
• TM-Series
• TG-Series
• G-Series

1. 1

   Verify that fault code 1069 (or equivalent 18072) is active, and note any other active codes that may point to related issues.

2. 2

   Access the on-board diagnostics H5 Switch Test Mode to check the raise/work switch functionality (the display should change from 'd0' to 'd3' or 'd4' and sound a tone when the switch is operated).

3. 3

   Visually inspect the wiring harness and connectors leading to the armrest control and EDC mouse for damage, chafing, or loose connections.

4. 4

   If the H5 test fails and visual inspection is clear, use a multimeter to perform continuity and voltage tests on the switch and wiring harness to check for open circuits or shorts to ground.

1. 1

   Isolate the faulty component

   Based on the H5 diagnostic test and multimeter readings, determine if the fault lies with the EDC mouse switch, the wiring harness, or the armrest controller.

2. 2

   Replace the EDC mouse

   If the switch is faulty, disassemble the armrest panels to access the EDC mouse. Disconnect the electrical connector, remove the mounting screws/clips, install the new unit, and reassemble the armrest.

3. 3

   Repair wiring harness

   If electrical tests indicate an open circuit or a short to ground in the harness, repair or replace the damaged section of the wiring.

4. 4

   Clear fault codes

   After repairs are complete, clear the stored error codes from the controller's memory using the tractor's diagnostic menu (HC routine) or a diagnostic tool.

5. 5

   Test Operation

   Start the tractor and test the full functionality of the electronic draft control system using the new raise/work switch.

6. 6

   Calibration

   If hitch performance seems incorrect after the repair, perform an EDC valve calibration.