just put a used lock assembly in a 2001 caravan for a customer. new ones are over $300 so we went the used one route. Well it all works except when he opens it with the switch it gets to where it should stop and the power door motor still is running and he said it jerks like its trying to open or shut more. Has anyone run across that before? He talked to a mechanic that looked up in some program that said it has to relearn itself on where it opens and stops at. When I ran it here at the shop it appeared to work correctly. Is there a sensor that tells the door when it should stop?

Thanks
corey

Anyone with ideas?

Not sure, but you might try searching the 4G forum here:
http://forum.chryslerminivan.net/forum.php

STANDARD PROCEDURE - POWER DOOR LEARN CYCLE

Any time a power side door component is removed, replaced, door adjustment is performed or diagnostic trouble codes are addressed and erased, a learn cycle must be performed. This learn cycle enables the power side door control module to learn or relearn its critical information (travel limits, resistance to door travel, etc.) which allows it to perform properly and safely. It also tells the technician that the system is performing properly and is able to be returned to service. To perform a power door learn cycle do the following:

Obtain a DRB III® scan tool.

Connect the DRB III® to the vehicle and check for any power side door system stored diagnostic trouble codes, erase any stored codes. Operate the system and check to see if any trouble codes return. If any diagnostic trouble codes return, diagnose, correct and erase the codes before performing the learn cycle. If a DRB III® scan tool is not available, the learn cycle can be performed by opening and closing the power side door using any of the normal open/close command switches. Be certain to cycle the side door through a complete open and close cycle or the procedure will not be complete.

Using the DRB III®, Go into Test Routine Menu and select a power open command.
Select a power close command.
The power side door learn cycle is complete.

NOTE:If the power side door will not complete a full cycle, a problem exists with the power side door system. Refer to Power Side Door Diagnosis and Testing.

thanks guys!