John Deere 520959.14 – TIQ / TIP: Operator Not Seated During Speed Selection Change

The transmission control system is detecting a commanded gear shift or speed selection change, but the system is not receiving a valid closed-circuit signal from the seat switch (Operator Presence Switch) to verify that the operator is actually sitting in the seat.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6090MC
• 6100MC
• 6110MC
• 6090RC
• 6100RC
• 6110RC
• 8245R through 8400R
• 9470RT
• 9520RT
• 9570RT

1. 1

   Ensure the operator is fully and firmly seated in the seat during operation

2. 2

   Perform a soft reset by cycling the tractor's key switch off and back on

3. 3

   Inspect the wiring harness and electrical connector located directly under the seat cushion for disconnected wires, pinched cables, or corrosion

4. 4

   Disconnect the seat switch and use a multimeter to test for continuity. The switch should change states when weight is applied to the seat cushion

1. 1

   Power Down

   Turn off the tractor, remove the key, and engage the parking brake.

2. 2

   Access the Switch

   Tilt the seat forward or remove the bottom seat cushion (depending on the seat model) to access the operator presence switch mounted in the seat base.

3. 3

   Disconnect Wiring

   Unplug the electrical pigtail connector from the switch.

4. 4

   Remove the Switch

   For twist-mount switches: Push in slightly and twist the switch counterclockwise to release it from the mounting hole. For bolt-on switches: Remove the two mounting bolts/screws securing the tabs.

5. 5

   Install the New Switch

   Insert the new switch and twist clockwise to lock it in place (or bolt it down).

6. 6

   Reconnect and Test

   Reconnect the wiring harness. Sit in the seat, turn the key switch on, and attempt a speed selection change to verify the 520959.14 code has cleared and the transmission shifts normally.