John Deere 001504.14 – XSC: Driver Seat Presence Switch Missing

The steering control module (XSC/SSU) has detected a loss of signal from the operator presence switch located in the driver's seat, meaning the system cannot confirm if an operator is seated. This prevents the tractor from operating correctly, as the presence of the driver is not being properly recognized. This fault is particularly critical when the AutoTrac™ automated steering system is active; if the system detects no operator for more than 7 seconds, it logs this fault and may disengage the AutoTrac function.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R

1. 1

   Verify the operator is correctly seated, as shifting position or bouncing in the seat can momentarily open the switch circuit.

2. 2

   Cycle the tractor power off and on to reset the control module and clear potential intermittent errors.

3. 3

   Access and clear Diagnostic Trouble Codes (DTCs) via the tractor's display, then operate the tractor to see if the code reappears (indicating an active/hard fault).

4. 4

   Perform a functional test of the operator presence system (e.g., start engine with parking brake engaged, lift off seat to verify engine or PTO disengages as expected).

5. 5

   Visually inspect the seat switch under the seat cushion for physical damage, corrosion, loose wire connections, or a broken plastic mount.

6. 6

   Test the switch electrically with a multimeter: disconnect the harness and test for continuity (ohms). The normally open switch should show no continuity when unpressed, and near zero ohms when the button is depressed.

1. 1

   Park and secure machine

   Park the tractor on a level surface, engage the parking brake, and remove the key from the ignition.

2. 2

   Disconnect battery

   Disconnect the negative battery terminal to prevent electrical shorts during repair.

3. 3

   Access the switch

   Tilt the operator's seat forward to expose the underside and locate the seat switch and its wiring connector. In some cases, the entire seat may need to be unbolted and removed (via hinge pin or bolts) for sufficient access.

4. 4

   Remove the faulty switch

   Disconnect the wiring harness connector. Remove the switch from the seat base by rotating it counter-clockwise (for twist-lock mechanisms) or removing its retaining screws/tabs.

5. 5

   Install the new switch

   Securely mount the new switch into the seat base and reconnect the wiring harness.

6. 6

   Reassemble and reconnect

   Reinstall the seat if it was removed, and reconnect the negative battery terminal.

7. 7

   Test the system

   Start the tractor and perform a functional check to ensure the new switch operates correctly and the fault code does not reappear.