John Deere 521407.19 – SCO: SCV XIV Control Lever Fault Message Received

The controller is receiving an invalid, missing, or out-of-range switch position signal from the Selective Control Valve (SCV) 14 control lever/switch. This typically means the physical lever or switch on the CommandARM/console is failing to communicate its position over the CAN bus network.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8225R
• 8245R
• 8270R
• 8295R
• 8320R
• 8345R
• 8400R
• 7210R
• 7230R
• 7250R
• 7270R
• 7290R
• 7310R
• 9470RT
• 9520RT
• 9570RT

1. 1

   Cycle Power: Return the SCV XIV lever to the neutral position, turn off the engine, and cycle the key switch to see if the code clears.

2. 2

   Reassign the SCV: Use the CommandCenter display to assign a different physical SCV lever to control SCV XIV. If the fault follows the original lever, the physical switch/lever is the culprit. If the fault stays with SCV XIV regardless of the lever used, the issue lies in the CAN bus wiring or the SCO module.

3. 3

   Inspect CAN Bus Wiring: Check the wiring harness between the SCV XIV control lever, the Armrest Control Unit (ACU), and the SCO module. Look for pinched wires, loose connections, or corrosion at the connectors.

4. 4

   Check for Related Codes: Look for accompanying codes such as SCO 521407.31 (SCV XIV Control Lever Command Missing) or SCO 521468.14 (SCV XIV Actuator Not Receiving SCO Message), which point to a complete loss of CAN communication.

1. 1

   Park and Secure

   Park the tractor on a level surface, lower all implements, and turn off the engine.

2. 2

   Access the CommandARM

   Remove the retaining screws on the CommandARM console to access the underside of the SCV control switches.

3. 3

   Inspect the Harness

   Unplug the wiring harness from the SCV XIV switch. Inspect the pins for corrosion or damage.

4. 4

   Test the Switch

   If the wiring is intact and the diagnostic checks isolated the fault to the lever itself, the internal potentiometer/switch has failed.

5. 5

   Replace the Switch

   Remove the mounting screws holding the SCV XIV switch assembly in place. Install the new SCV switch and plug in the wiring harness.

6. 6

   Reassemble and Calibrate

   Reinstall the CommandARM covers. Start the tractor and clear the stored diagnostic codes. Test the operation of SCV XIV to ensure full range of motion without throwing a code.