SCV Control Unit (SCC) Diagnostic Trouble Codes

Although the diagnostic codes listed below are not a complete list of the diagnostic trouble codes, they do reflect codes which may be observed while operating the tractor and have corrective action that the operator can take. Many codes which appear may be corrected simply by cycling key switch or by following the solution on the CommandCenter™ page, then cycling key switch.

If corrective action cannot be taken after cycling power to the tractor or if there are any questions, contact your John Deere™ dealer.

SCV Control Unit (SCC) Diagnostic Trouble Codes
Diagnostic Trouble Code	Display	Solution
SCC 158.4	Hydraulic System	Reduce electrical load or increase engine RPM to attempt vehicle system recovery.
SCC 168.4	Hydraulic System	Reduce electrical load or increase engine RPM. Shut down the engine and check fuse. Restart engine to attempt vehicle system recovery.
SCC 1079.3	Hydraulic System	Check implement wire harness and connector. Restart engine to attempt vehicle system recovery.
SCC 1079.4	Hydraulic System	Check implement wire harness and connector. Restart engine to attempt vehicle system recovery.
SCC 2602.18	Hydraulic System	Limit hydraulic use to allow oil reservoir to refill. Check oil level according to Operator’s Manual procedure.
SCC 523216.4	Hydraulic System	Reduce electrical load or increase engine RPM. Shut down the engine and check fuse. Restart engine to attempt vehicle system recovery.
SCC 523217.4	Hydraulic System	Reduce electrical load or increase engine RPM. Shut down the engine and check fuse. Restart engine to attempt vehicle system recovery.
SCC 523219.4	Hydraulic System	Reduce electrical load or increase engine RPM. Shut down the engine and check fuse. Restart engine to attempt vehicle system recovery.
SCC 523786.7	Hydraulic System	Increase SCV max flow rate.
SCC 523788.14	Hydraulic System	Reference Hydraulic Option Configuration procedure in Operator’s Manual.
SCC 523788.2	Hydraulic System	Reference Hydraulic Option Configuration procedure in Operator’s Manual.
SCC 523788.31	Hydraulic System	Reference Hydraulic Option Configuration procedure in Operator’s Manual.
SCC 523942.31	SCV VI On	Return to seated position.
SCC 523943.31	SCV V On	Return to seated position.
SCC 523944.31	SCV IV On	Return to seated position.
SCC 523945.31	SCV III On	Return to seated position.
SCC 523946.31	SCV II On	Return to seated position.
SCC 523947.31	SCV I On	Return to seated position.