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This feature has been on some Lexus vehicles since the 1990's and was formerly enabled by default.
There have been a number of reports on Lexus forums about windows and sunroofs being opened inadvertently due to a problem I have called "TPS", i.e. Tight Pants Syndrome. Something carried in the same pocket as the key/fob presses continuously against the unlock button and opens the windows and sunroof. It's not a problem if the vehicle is in a garage but it's a different story when the vehicle is parked outside during rain or snow which has sometimes been reported.
I have wondered if these reported occurrences have been the reason that the feature is now disabled by default.
My Lexus vehicles were always in my garage when something in my pocket - probably a Swiss army knife - caused the windows and sunroof to open. I even had it happen while I was working on - sometimes under - one of our vehicles in the garage. I've become more vigilant about what I carry in the same pocket as a key fob and usually remove fobs from my pocket when working on a vehicle and as soon as I enter my house.
I've sometimes had a similar problem with our Sienna - something in my pocket presses against the sliding door or hatch buttons on the fob and causes a door to open. It's usually a sliding door that I find open but I suspect it has also happened on the rear hatch door since there are a few chips in the bottom edge that might have been caused by the door opening and contacting the garage door. I've never found the hatch door open since it would automatically reverse when it hits the garage door. Maybe the hatch door problem can't happen on recent Highlanders - the parking sensors on a friend's Highlander prevents the hatch door from being opened with the remote when the door is near an obstacle.
I don't mean to dissuade anyone from having the window/sunroof remote open feature enabled on a Highlander but only to alert owners about, and to explain how to mitigate, the risk. It's a very nice feature to have on hot sunny days when parked outside. On my last Lexus LS, I could roll down the windows and open the sunroof to let hot air escape from over 100 yards away by pressing the fob against my chin while I pressed the unlock button. I can open the side and hatch doors of our Sienna from nearly the same distance by using the chin-press technique.
Original owner of 2012 Prius v Five and 2014 Sienna Limited - both Blizzard Pearl with Advanced Technology Package
Last edited by ToyoJim; 06-06-2019 at 04:00 PM.
Reason: gwammer corecshun