John Deere 524104.31 – SCU / SCC: SCV III Control Lever Command Missing

The fault code indicates a communication failure with the third Selective Control Valve (SCV) lever. The Selective Control Unit (SCU) or SCV Control Unit (SCC) responsible for hydraulic operations is not receiving the expected command signals from the lever that operates SCV number three, meaning the command message is missing or invalid.

• 9230
• 9330
• 9430
• 9530
• 9630
• 8310RT
• 8335RT
• 8360RT
• 7720
• 7820
• 7920
• 7630
• 7730
• 7830
• 7930
• 7810
• 7210J

1. 1

   Restart the tractor to see if a temporary communication glitch clears the code

2. 2

   Check for other active fault codes related to the SCU, power supply, or CAN bus communication to help pinpoint the root cause

3. 3

   Inspect fuses related to the hydraulic control units (e.g., check fuse F30 on 9x30 series tractors for SCV III and IV solenoid power issues)

4. 4

   Visually inspect the wiring harnesses and connectors associated with the SCV control levers for any signs of damage, corrosion, or loose connections

5. 5

   Check the hydraulic oil level to ensure basic hydraulic system requirements are met

1. 1

   Connect diagnostic tool

   Connect John Deere Service ADVISOR to the tractor's CAN bus to monitor live data from the SCV III control lever.

2. 2

   Diagnose root cause

   Based on the live data, determine if the communication fault lies with the control lever itself, the wiring harness, or the SCU/SCC module.

3. 3

   Replace control lever

   If the diagnostic data indicates the lever is faulty, replace the SCV III control lever.

4. 4

   Repair wiring

   If the wiring is identified as the issue, repair or replace the damaged section of the harness.

5. 5

   Reprogram or replace SCU/SCC

   If the SCU/SCC is determined to be at fault, have a qualified technician reprogram or replace the module.

6. 6

   Calibrate SCV system

   After any repairs or part replacements, perform a calibration of the SCV system.