John Deere SCU524038.19 – SCU: No External Control Message Reboot the Vehicle
Issue description
The system is not receiving an external control message, which may indicate a communication issue or a fault in the control system. The vehicle should be rebooted, and the SCV IV Lever should be cycled through all positions. If the code persists, professional assistance is required.
Check the cause
The SCV IV Lever for proper movement and position
The connection or communication link to the external control system
The system reboot process to ensure it is performed correctly
Repair steps
Reboot the vehicle
Follow the manufacturer's procedure to reboot the vehicle.
Cycle the SCV IV Lever
Move the SCV IV Lever through all positions to ensure proper operation.
Monitor the system
Observe if the fault code returns after rebooting and cycling the lever.
Parts you might need
(0)Get help to fix this fault by requesting a quote
