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hello I'm an M.B. tech.-unfortunatly after you enter the wrong code (I beleive more than 3 times) it goes into a special security mode. The only way to unlock this feature is to keep power to the unit for 24 hours. If i remember correctly there are 2 different modes. The 1st mode is a 1 hour mode, the 2nd is a 24 hour mode. Your best bet is to take it to a dealer and have them reset it for you. If the unit is still in the first mode you can hook up a battery charger and keep the key on for 1 hour ( you could also do this for 24 hours). These vehiclles have an elctric throttle motor called an E.A. actuater. These units are very problematic and are usually damaged from somebody leaving the key on for an extended period of time. If you are going to attempt to perform this reset procedure yourself I would strongly recomend unplugging the actuaster when leaving the key on. The next problem would be if it lost it's synchroniztion you would need a scan tool to resynch. it. I just wanted you to be aware of this problem so you can be prepared. If you do try to leave the key on for 1 hour you probably would be o.k. it's the 24 hours that I'm concerned with. Make sure you turn the radio on when the key is on and hook up a battery charger. Be absolutly sure you have the right code because alot of people replace these units and don't replace there old code card. Good luck
SOLUTION: ERROR MESSAGE U2-40, SHARP COPIER AR-5127 PRESS # PRESS = PRESS C PRESS = TYPE 16 PRESS ENTER BUTTON (the button for making photocopy) PRESS 'OK' TWICE Note: be fast in pressing all the buttons. FROM EKPA ONU - (+2348055790979, NIGERIA,LAGOS)