We can think of a few common reasons.
Sienna sliding door stuck.
At first the door won t work properly.
If you pull the handle on the inside or outside it doesn t open the door it behaves just like it is locked.
Frayed cable the cable in the side door is prone to fraying and then breaking.
We have an 05 sienna and like everyone every winter the side sliding doors freeze.
When your sienna side door won t close one possibility is a circuit overload.
I broke the handle off last winter and got the opportunity to figure out how to replace it which wasn t all that difficult and sure enough today it s 6f outside and the door is stuck.
If you push the open button inside the car or on the fob you can hear the motor try to open but the door doesn t budge and the motor stops after a second.
Last night i sprayed everything with silicone spray with no luck.
The sliding door latch is not working see the picture of the latch unit.
The automatic sliding passenger door on my 2005 toyota sienna won t open.
Most common problem is the motor of the latch fails.
The electric motor s circuit will become overloaded and this will trip the fuse and prevent the door from being closed entirely.