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It is common for the rollers in the door to break and come off. This will cause this problem I have seen this before and replace the door rollers and the problem never returns.
You can look up at the middle track under the rear window glass, you will see the rollers missing from the door bracket.
Is the door adjusted properly?
power sliding door
Resetting the Power Sliding Door Control Unit
If the battery terminal is disconnected or No. 7 (7.5 A) fuse in the driver's under-dash fuse/relay box is removed while the power sliding door is operating, the power sliding door will not be able to be opened or closed automatically until it is reset. To reset the system, fully close the sliding door manually. Once the battery terminals are reconnected or No. 7 (7.5 A) fuse in the driver's under-dash fuse/relay box is replaced, the power sliding door system will automatically reset. Make sure the power sliding door operates properly.
This is the reset procedure for the door, I edited the battery reset.
I can send you a pdf of how to adjust the doors if you would like.
I have seen problems with the latch as well. Have you tried spraying the latch with wd40?
I also have pdf diagrams of how to replace the latch.
I do not know where you can get the full manual.