John Deere 522580.31 – CCU: Front-Wheel Drive Switch, Fault

The CCU detects an incorrect or missing CAN BUS message regarding the state of the Mechanical Front-Wheel Drive (MFWD) switch.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6090MC
• 6090RC
• 6100MC
• 6100RC
• 6110MC
• 6110RC
• 5090M
• 6105M
• 6150R

1. 1

   Inspect the MFWD rocker switch on the side console for physical damage, sticking, or liquid intrusion

2. 2

   Remove the console panel and inspect the wiring harness connector for loose pins, corrosion, or pushed-back terminals

3. 3

   Test the switch for proper continuity in all positions (Off, Auto, On)

4. 4

   Check the CAN high and CAN low wiring between the switch harness and the CCU for open circuits or shorts to ground

1. 1

   Disconnect Power

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

2. 2

   Access the Switch

   Carefully pry up or unscrew the side console/dash trim panel housing the MFWD rocker switch.

3. 3

   Remove the Switch

   Squeeze the retaining tabs on the back/sides of the rocker switch and push it out through the front of the panel.

4. 4

   Disconnect

   Unplug the electrical harness connector from the back of the switch.

5. 5

   Install New Part

   Plug the harness into the new OEM rocker switch, then snap the switch back into the console panel.

6. 6

   Reassembly & Clearing

   Reinstall the console trim, reconnect the battery, and turn the key to the ON position. Clear the stored CCU fault codes using a diagnostic tool or the onboard display.

7. 7

   Test Operation

   Engage and disengage the MFWD switch to ensure the front-wheel drive activates and the code does not return.