2002 Chrysler T&C sliding door won't UNLOCK w/ Switch or Key FOB

Take a close look at the wiring and connections at the drivers door switch.

lost the other fob>>> ?????
never own a car with 1 fob.
and if one fob messes up, the battery inside is dead. (or worse)
if just lock fails the button is bad, if one fob false, and they do
its just cheezy switch. (can be cleaned)
use the other FOB, if it fails, post.

Sounds like the drivers door lock switch is bad an as far as the auto start remote the contacts under the button get dirty and won't make contact, open the remote like changing the battery and you can probably get at the contact button, if it's a little carbon button they can be cleaned with a pencil eraser and then paper tower with a bit of rubbing alcohol, if it's an actual switch you can try spraying some contact cleaner into the switch. let it dry before you put the battery back in.

Troubleshooting is required to inspect few parts.It can be issue with ignition switch.Its not getting off.Or issue with sensor or wiring.Or its faulty lock itself.Click the link below and follow the troubleshooting:----Driver Door will not lock or unlock with Key or Remote? http://whatisbyme.blogspot.in/2012/05/1998-toyota-landcruiser-driver-door.html
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Driver side door will not lock or unlock with Remote? http://technoanswers.blogspot.in/2012/04/2009-toyota-tundra-driver-side-door.html
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Central locking not working ? http://schematicsdiagram.blogspot.in/2012/03/this-is-how-system-operates.html

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Remote will not unlock Rear door ?
http://schematicsdiagram.blogspot.com/2011/12/remote-will-not-unlock-rear-door-on-gmc.html

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Repairing car Door lock Actuator?
http://howtobyme.blogspot.com/2011/11/repairing-car-door-lock-actuator.html

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How to Access car door panel?
http://howtobyme.blogspot.com/2011/11/how-to-access-car-door-panel.html

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Vehicle door panel components?
http://howtobyme.blogspot.com/2011/11/vehicle-door-panel-components.html

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This will help.
Thanks.

do you have a second fob try it battery may be low may need reprogramed or replaced check with your dealer

reprogram the remote transmitter. first leave driver door open all other doors closed,key removed from the ignition switch. insert key into the ignition switch,then remove it.press lock and unlock on the vechicle door lock control switch at 1 second intervals 5 times. close and repoen drivers door.press lock and unlock on the vechicle lock control switch at 1 second intervals 5 times. insert key into ignition switch. switch ignition on and off twice to program a remote transmitter code whilst erasing the original codes or three timre to check how many remote transmitters are currently registered.remove key from the ignition switch.system should now lock and unlock.twice to indicate programming mode or one to four times,slowly to indicate number of remote transmitters registered.for the solara press and hold lock and unlock remote buttons together, press lock remote button for a second period of 1 second. system should now lock and unlock vechicle.once to confirm, twice to indicate registration has failed.if required repeat button procedure to program remaining remote transmitters.note to exit programming mode close drivers door or insert ignition key.maximum of 4 remote transmitters can be programmed.if akk failed let dealership reprogram remote transmitters.

1. Close and lock all doors with the driver’s side power lock/unlock switch.

2. Insert key into ignition and remove it from the ignition key cylinder at least six times within 10 seconds. Your Hazard
Lamps will flash if you have performed this step successfully. NOTE: Withdraw key completely from ignition cylinder
each time. If this procedure is performed too fast, system will not enter programming mode.

3. Insert key into the ignition cylinder and turn to the ACC position.

4. Within 5 seconds, push ANY button on the remote transmitter. Your Hazard Lamps should flash. NOTE: Do not press
the button more than one time in the above step. If the button is pressed more than one time, the programming
procedure will not be successful.

5. If there are any remaining transmitters (including the old ones), unlock then lock all doors using the driver’s side
power lock/unlock switch and within 5 seconds, push ANY button on the next remote. Your Hazard Lamps should
flash. Repeat this step for each transmitter (including any existing transmitters).
6. Turn the key to the OFF position, remove keys from the ignition, unlock doors using the driver’s side power lock/unlock switch and open the driver side door.

remove the keyring from the fob open it and replace the watch battery in it

you may have a dead remote battery. have it checked.