Fendt 00.1.73 – Instrument Cluster ECU (A007): "Up" button on the left dashboard control panel non-operable

The system has detected that the "Up" button on the left dashboard control panel (component A037 or A036) is non-operable, meaning the key does not function or the signal is not being received by the module.

• 922 Vario COM III
• 924 Vario COM III
• 927 Vario COM III
• 930 Vario COM III
• 933 Vario COM III
• 936 Vario COM III
• Fendt 300 Vario (COM III)
• Fendt 400 Vario (COM III)
• Fendt 700 Vario (COM III)
• Fendt 800 Vario (COM III)
• Fendt 900 Vario (COM III) (Models 919, 922, 925, 927, 930, 933, 936)

1. 1

   Perform a physical inspection of the 'Up' button on the left dashboard control panel to check if it is stuck, damaged, or lacks normal tactile feedback (indicating a collapsed internal microswitch).

2. 2

   Consult the 'Instrument cluster' circuit diagram to locate the wiring harness connecting the left control panel (A037/A036) to the Instrument Cluster (A007).

3. 3

   Check the harness and connectors for continuity, corrosion, or loose pins.

4. 4

   Use the FENDIAS diagnostic software or the tractor's onboard diagnostic menu to monitor live button states. If other buttons register but the 'Up' button does not, the panel has likely failed internally.

1. 1

   Disconnect Power

   Turn off the tractor and disconnect the battery to prevent electrical shorts.

2. 2

   Access the Panel

   Remove the hatch cover and surrounding trim from the steering column/instrument panel to access the rear of the left dashboard control panel.

3. 3

   Disconnect Harness

   Unplug the electrical connector from the back of the A037/A036 control panel. Inspect the connector for any signs of moisture or pushed-out pins.

4. 4

   Remove the Module

   Unclip or unbolt the faulty left dashboard control panel from the dashboard housing.

5. 5

   Install the New Part

   Seat the replacement control panel into the dashboard and reconnect the electrical harness.

6. 6

   Reassembly

   Reinstall the steering column covers and dashboard trim.

7. 7

   Clear Codes

   Reconnect the battery, turn on the ignition, and use the tractor's terminal or FENDIAS tool to clear the stored 00.1.73 fault code.

8. 8

   Test

   Press the "Up" button to ensure proper functionality is restored.