Question about 2004 Toyota Sienna

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I have a 2004 Sienna with a drivers side sliding back door that will not lock or unlock with the key fob or when I press the lock/unlock switch on the drivers side door. The problem is with this that when I lock door the car will auto unlock because the one door will not lock. Is there anything that I can do to fix this myself?

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So the sliding back door is stuck in the unlock position it sounds like?Also,the switch on the door...that locks/unlocks all doors?And is there an option to lock/unlock each individual door on that switch?Please let me know and I will see if I can determine how tedious it may be to self-repair or even just to troubleshoot.Also,do you have any electrical measuring equipment?Greg

Posted on Aug 05, 2010

  • rachelkopp Aug 07, 2010

    The lock is stuck in the lock position or if I manually move it to unlock position it is stuck.This is what I have to do to lock it ( manually move the lock to locked posittion)and then I can use the fob and it secures the car then. There is only one main lock/unlock switch on the drivers side door and the front passengers side door. I hope this helps...to figure it out.

  • Greg McCarthy Aug 07, 2010

    It sounds like the problem is within the sliding door's system.Since there are 2 different switches to lock/unlock it,and neither one does,that eliminates both of those switches.I am not real familiar with the particular system,but I know plenty about electrical systems and how it is probably designed.There are 2 possibilities.1.There is an actuator inside the door that activates the switch to the desired position.2.The signal that tells the lock to go up/down is somewhere else in the car.I tried looking at toyota.com and their support is only M-F.I would hate to tell you how to open up the interior door panel and have that not be it.I have done that many times and they are all basically installed the same with little variation.If you want to try calling a dealer to speak with a technician about the location you could,but I would be willing to do it.I would need an engine size which is printed on the engine valve covers,and a particular model if there is one.(LE,SE,LX) or what ever if there is one.It usually gives those type letters on the back of your car.If you can get that info for me today,I would try a dealer locally.Please let me know what you decide.Thanks,Greg

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