Massey Ferguson 06.02.17 – TRANS1: Issue With Signal From PTO 540 ECO Button Dyna VT

The transmission controller is receiving an erratic, out-of-range, or missing electrical signal from the rocker switch used to engage the 540 ECO Power Take-Off (PTO) speed.

• 7720S
• 7724S
• 7716
• 7720
• Tier 4 (2015-2021)
• 7718
• 7722
• 7722S
• 7715S
• 7718S
• 7715
• 7726
• 7719
• 7714
• 7724
• 7716S
• 7726S

1. 1

   Perform a physical inspection of the PTO 540 ECO rocker switch on the side console to see if it feels dead, fails to hold its position, or sticks.

2. 2

   Remove the console trim and inspect the wiring harness connector at the back of the switch for loose pins, corrosion, or melted plastic.

3. 3

   Use a multimeter to perform a continuity test on the switch's internal contacts to verify the circuit closes properly when pressed.

4. 4

   Check the wiring continuity between the switch connector and the TRANS1 module to rule out a broken wire or short in the cab harness.

1. 1

   Turn off the tractor and disconnect the battery

   to prevent electrical shorts.

2. 2

   Carefully pry up or unscrew the trim panel

   on the right-hand operator console where the PTO switches are housed.

3. 3

   Disconnect the electrical pigtail/connector

   from the back of the faulty PTO 540 ECO switch.

4. 4

   Squeeze the retaining tabs on the sides of the old switch

   and push it up through the top of the console panel to remove it.

5. 5

   Snap the new OEM replacement switch

   into the panel.

6. 6

   Reconnect the wiring harness

   (it is a direct plug-and-play fitment).

7. 7

   Reinstall the console trim panel

8. 8

   Reconnect the battery, start the tractor, and test the PTO 540 ECO engagement

   to confirm the fault code has cleared.