Fix 2007 toyota sienna 2007 sliding door

Better to fix it!

https://www.google.com/search?q=power+to+Toyota+Sienna+sliding+door

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Could be resistance in one of the tracks, or the motor.
If the motor hits a resistance the door opens in case the resistance is a human.

Can be issue with the switch.
Help links are provided below for detailed procedure,Click the link below:---
Front Door dis-assembly diagram for Toyota car?

http://repairhelpcenter.blogspot.in/2012/02/front-door-dis-assembly-diagram-for.html

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Rear Door dis-assembly diagram for Toyota car?

http://repairhelpcenter.blogspot.in/2012/02/rear-door-dis-assembly-diagram-for.html

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How to test Power door locks? http://repairhelpcenter.blogspot.in/2012/02/how-to-test-power-door-locks.html

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right side slide door light switch on Toyota Sienna? http://repairhelpcenter.blogspot.com/2012/01/details-for-replacing-right-side-slide.html

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Door locks not working? http://technoanswers.blogspot.com/2012/01/door-locks-not-working-on-ford-explorer.html

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Power door locks not working? http://schematicsdiagram.blogspot.com/2011/12/power-door-locks-not-working.html

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

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

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

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This will help.
Thanks.

I have written a step-by-step tutorial on how to remove (and replace) the bumper of a 2004-2007 Toyota Sienna on my blog: John Fixes Stuff How to Remove the Front Bumper on 2004 2007 Toyota Sienna

To start, the noun "''rear latch switch'' is incorrect. It's actually called "Slide Door Lock". It's located on page BO-20 of the Toyota Repair Manual for the 2001 Sienna. There are two door locks on one sliding door. One in the front and one in the rear. Obviously, you want the one in the rear. The location for the "Slide Door Lock" (which also contains an electric switch) is in the rear of the sliding door located mid way up door. You can see (sliding door opened from the back) it without dissembling the door. And, the lock is made up of plastic (dirty white in color).

clean and lubricate door sliding mechanism and locks with silicone spray lubricant, clean all door seals and jambs 

This may or may not work depending on exactly what is wrong with the door, I cant tell what is wrong without looking at it directly however:
You can try starting with all doors closed and unlocked, keys in hand disconnecting the battery and letting the vehicle sit for 2 min or so, then reconnect the battery. Put the key into the ignition and turn it to the on position but do not start the van. Next press the button to disable the power sliding door for the drivers side, then manually open the door fully, wait 5 seconds, then close it manually fully. Press button the button again to re-enable the power sliding door, then try to use it with the automatic feature either by pulling the handle or using your remote, this may or may not work depending on if the door has somehow become de-initialized (it should work now) however if something is broken inside the door closing mechanism or door closed/open sensors, the door will continue to malfunction.

Check out this youtube video for taking off the interior door panel and resetting. https://www.youtube.com/watch?v=MkC2OiOiE_U