My power window on the passenger is side is not working. l do not know if it is actually the motor or a fuse.

no..

First check the fuse. If it good you may need to replace the switch. You also might be able to clean the switch. but start with the fuse.

Maybe the window lock is on.

You should check ur fuses first just to make sure the appropriate one is not burnt out, this is quick & easy.

However it would not surprise me if ur window motor went out. Although l have not seen a TSB or recall on this, from my experience with other owners this is unfortunately a common problem with the G35. Mine is a G35 Coupe, & l have had to replace the motor once. It is relatively straight forward & will be covered under warranty.

A couple of things u can try to narrow down the problem is to try operating the window using different methods. If any of them works, it is probably a faulty motor as a burnt fuse would probably prevent any operation of the window. First try the standard power window button on the door, if this does not work try using the key in the door key hole (turn the key to the unlock position & hold, the windows should open in a sequence one by one), if that fails try using the unlock button on ur key fob (hold the unlock button down while next to ur car, this should open the windows as well). Hope that helps.