Posted: Aug 04 2008 at 3:38pm | IP Logged

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mbarr69;

Have you tried the remote unlock. There is a weird combo of locking with the remote then unlocking from the inside that caused me a problem years ago. Might try leaning on the door to close it tighter then unlock it. Let an old cop or crook try it...

My passenger door still has a standard key-lockset. I notice mant new vehicles don't.

Posted: Aug 06 2008 at 8:35am | IP Logged

Usually, even if the lock is an automatic lock, it relies on a motor and mechanical arm to lock/unlock the latch. 

If you've got a frontier, why haven't you downloaded the factory service manual yet?  there's a stick for it in this forum.  Here's the link. 

http://phatg20.info/index.php?option=com_remository&Item id=26&func=select&id=1

Go there, get your FSM, look up the diagram on the door panel removal and lock diagram.

Hope that helps.