Strike open light flashes and gate opens

on the shaft that controls the arm or gear for the gate movement there will be 2 cams
open the gate and then loosen of one cam and adjust it off the micro switch until the gate is fully open
lightly tension the screw and then close the gate
repeat the adjusting on the second cam until the gate is fully closed
tension up the screw and then using the remote open the gate when it is fully open leave it or in it is not make small adjustment to get it open
press the remote to close the gate and again adjust to properly close the gate

reprogram the opening sequence in the control box
it should that the first gate opens then the second gate opens a few seconds behind it
closing is the reverse
you can program that only one gate opens
you can also program that one gate is a entrance gate where it opens until you stop it , then when you have passed through , press it again and it closes
read the operating instructions and follow the programming procedures closely

There are switches on both ends of the course of the motor, if one fails it will only work on the side that´s ok. That´s why it opens but do not close.Check it out.

Check if it has stops anywhere in the system, usually there are micro switches that are activated by arms, etc that tell it how far to open and close. You may need to adjust them.

Open gate and find where the wiring enters the gate (bottom of door) pull back the rubber insulator and check for broken wires or wires touching each other.

Look at the back of the motor unit and see if that little light is flashing a code. Post the code.

Insert the key and turn the lock cylinder while lifting up on the lift gate. You have to get the gate open. Once open, The strike plate (where the locking mechanism hits) is bolted to the jamb. Loosen the bolts and slightly move it toward the rear of the vehicle. NOT TOO MUCH!
Tighten the bolts, and try it. Hope this helps.

The memory could have been somehow corrupted. I would suggest that you call in an experienced person to reset and reprogram the open/close positions.
Hope this helps :)

There was a minor change for mine to work.. see below..

- you must park your Prius close to the gate opener, leaving it running (obviously not in the way of the gate closing)
- Hold the button the the mirror and then push your garage door remote button and hold until the light on the mirror starts to flasyh fast. THIS programs the button on the mirror, but not the garage opener - yet (this was key for me)
- locate the "learning button" on the opener itself
- press the "learning button" on your gate opener and then get back into the Prius within 30 seconds (more time than it sounds) and press the SAME Homelink button you just programmed above. I don't recall how long I held the pre-programmed button, but the light will flash as I recall.
- Then, when working the garage door, you may need to hold the mirror button for a good second for it to work - but I had tried for months to get mine to work, and finally after reading many posts, the above sequence worked on my 2008 Prius with my Lift Master, Security + rolling codes garage opener.

Just - program the button on the mirror with your remote FIRST.. the garage opener will not work.. then use the Learn button on the garage opener and the SAME BUTTON you just programmed.. and it worked great for me. Not programming the mirror button first will not work. Using only the Learn button will not work. You must program the mirror first with the remote, then use the learn button and the SAME button on the mirror. Hope this helps.

Scott 2008 Prius with Lift Master Security + opener.
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Push the button you want to use and hold until the light flashes rapidly.Then hold your remote that came with the garage opener close to the visor with the homelink button that was just flashing push the garage remote button untill the light begins to flash rapid again. Then get a ladder and push the learning button on the garage opener motor. Then within 20 seconds get in your car with the key on to the position just before starting the car and hold the button untill it flashes rapidly ....that should do it...that is how it was done for my 1999 528i