Strange behaviour

[Christine]

I left my lexus ls 600H parked for a short while,all locked up!

When I returned to it all the windows and the sunroof was open and it was unlocked...I think not too positive on that!

Has anyone got any ideas plz??

[DomTurner]

This is most likely a "feature" of the smart key where holding the unlock button for a period of time will unlock the doors and then open all windows and the sunroof. Holding the lock button will close them.

This becomes a problem if you accidentally sit on the unlock button when the keys are in your pocket for example - my bets are on this.
 

 

If you can rule this out by trying it yourself then I'm not sure of the issue.

[steve2006]

Hi Christine and welcome to the LOC.

There is a remote key fob function that will do this I.e. wind down all your windows and open the sun roof.

IIRC ( check this in your owner’s handbook) you need to press and hold the unlock button.

I wonder if you accidentally pushed the button as you walked away and put the keys in your pocket or bag?

The other option is did you try and open the car from a distance on your return and pressed the unlock button several times or for a longer press than normal?
 

Obviously keep an eye on it.
 

 

 

[steve2006]

You beat me to it Dom 😀

[Linas.P]

That has nothing to do with key feature, although there is such feature on most Lexus cars since 2001 or so. However, I doubt you held unlock button for 5 seconds without noticing it, whilst also being withing ~50m from the car.

This happens when your windows are not "initialised". Happened to me once, what was worse it was sunny summer day with about 30 minutes of freak heavy shower in the middle and windows opened exactly during that shower - just my luck! So the car was all wet. And also my master windows switch worked despite replacing Battery, but it was definitely not properly initialised. 

Basically after batter is replaced, or disconnected and reconnected one has to re-initialise all windows. If this is not done then all windows can randomly open like that. Door should not unlock to be honest, but my bets are still on windows initialisation problem rather than somehow pressing unlock button for 5 seconds on the key. Below shows how you initialise all windows: