CAN-BUS indicating MFD (CCH) or Front Diff Lock (4WD)Switch failed in the armrest. Possiblefailure modes: 1. MFD (CCH) or Front Diff Lock (4WD) failed in Armrest2. Auto MFD Switchfailed in Armrest, (CCH). 3. Communication problems between the TCU controller and theArmrest
If Steering Not Working,Hydraulic suction filter plugged.Improper tire inflation.Steering linkage needs lubrication.Excessive play in steering. See your John Deere Dealer.