John Deere 524101.31 – SCO: SCV VI Control Lever Command Missing

The system has detected a loss of signal or communication from the control lever for the sixth Selective Control Valve (SCV). The command from the operator's lever is not being received by the Secondary Hydraulic Control Unit (SCO).

• 9230
• 9330
• 9430
• 9530
• 9630
• 9x30T Series

1. 1

   Restart the tractor to see if a simple power cycle resolves a temporary communication fault

2. 2

   Inspect fuse F29, which supplies switched voltage to the SCO; a blown fuse will cut power to the control unit

3. 3

   Check for other active fault codes, particularly supply voltage codes (SCO 000158.04, SCO 000168.04) or missing messages from other units

4. 4

   Visually inspect the wiring harness and connectors leading to the SCV control lever and the SCO controller for damage, pinching, or disconnections

5. 5

   Inspect the area around the batteries and alternator for signs of damage, corrosion, or loose connections

6. 6

   Verify the operator presence (seat) switch is functioning, as some SCV functions are disabled if the operator is not in the seat

1. 1

   Disconnect power

   Disconnect the battery before starting any electrical work on the armrest console.

2. 2

   Access the console

   Lift the top half of the armrest console. This may involve removing bolts from the bottom of the console to gain access to the levers.

3. 3

   Remove the faulty lever

   Locate the SCV VI lever. Remove the screws holding the lever or switch in place.

4. 4

   Disconnect wiring

   Unplug the wiring harness from the faulty SCV lever.

5. 5

   Install new lever

   Secure the new SCV lever in place with its screws, reconnect the wiring harness, and reassemble the armrest console.

6. 6

   Test and calibrate

   Reconnect battery power and test the functionality of the new lever. Note that a calibration by a John Deere dealer may be required for proper operation.