Flat 12v battery can't unlock doors

[fraterra]

Hi there, I did not use my Yaris Cross for a while so I think the 12v is flat.

Today the car won't unlock even with the mechanical key, I've also tried with the spare key but it doesn't work. Is there any other way to unlock the door?  Thanks

 

[TonyHSD]

Hi, 

there is no another way to unlock unless you use the mechanical key. The key may not turn or turn easily because never been used before and might be corroded a bit or get some dust and debris. You can spray some wd-40 now and leave until tomorrow. Then spray again and try with the key and almost certainly it will unlock. Then hook a jumó start onto jump points under thinner and you are good. If you start the car let it stay ON for an hour or recharge the Battery with a smart charger until shoes full. If you are lucky that’s all you need but if not then a new Battery may be needed. You will find that soon after. 
Good luck 

[fraterra]

Thanks! It worked!