On my RX350 the clock did not re-set to DST and still shows an hour ahead. I have it set to auto-set and dst turned on. Did anyone elses change correctly??

-Ken

 

I noticed the same thing this morning. My guess is it'll correct itself later.

 

like you guys, i thought it would change itself, but you have to click DST OFF in order for the hour to go backwards. the car does not know when DST is so you have to tell it, even in auto-set on.

DST on does that mean "the nav with automatically revert the time, if you set it on

it means, ON-one hour more, off-one hour less

cheers

 

I thought since the time is automatically adjusted by the GPS clock that it'll change with DST but I guess not. There must be no correction from the satellite broadcast for DST.

 

The satellite sends down an absolute time value, probably GMT. This time signal can be received in any number of time zones. The device receiving the signal is where the relative time is set (which is the number of hours before or after GMT).

As noted above, the car does not know when DST starts or ends (e.g.: next year the government has established different dates from those used this year; the car knows nothing of this; another example: some counties is SW Indiana do not observe DST while adjoining counties do). The car does not know what county or time zone it is in, nor does it keep up with legislative changes, so you have to tell it when to move ahead or back one hour; in doing this you are simply adjusting your relative time from GMT.

This is why, when you set up the clock in your computer, (or in your TiVo, which is just a single purpose computer) you have to tell it what time zone you are in and tell it whether you observe DST or not. With that info, and a static location, it can make the changes for you.

 

I had Auto adjust and DST turned ON with the correct time zone and the clock did not change at all, had to turn DST OFF for the clock to display correct time. I guess 6 months for now, I will have to change DST back to ON.

 

Thanks for the responses -

So, the DST checkbox just toggles the clock by one hour as I now understand it. You would think since the GPS does know where you are, it could change you as you change timezones and go in and out of zones that use DST.

Probably have to wait for the '08 for that one....

-Ken

 

At least it was pretty simple to change the time. Some cars are real pain. Hopefully, it will be automatic in the future. If my Casio watch can figure it out, Lexus should be able too.

 

I usually set my watch by the atomic clock in our den that gets regular updates from WWV - or easier by the clock on the cable box that is linked to the satellite signal. There is a 3 second delay due to signal latency, so at 12:00:00, the signal you recieve will actually be 3 seconds earlier - your display will read 11:59:57. Unless you are an absolute time nut like one of my neighbors, this error is REALLY negligible.

If you are sitting in your car, you have access to the satellite time if you have the Nav option. Go to your service screens and select "GPS" to see the satellites you have locked up, signal strength, and fix data. At the lower right you will see the current time (expressed as GMT). If you know the difference between GMT and your local time zone, (or at least know your approximate time) you can easily set your clock accordingly.

 

- I also had this problem (2011 RX450h) that the auto-set in the Nav for observing DST is not automatically changes to hour back. Some indicated to turn off the auto DST and see then whether the clock will go one hour back and then in the spring to set it on auto-DST setting in order to work?!

 

This exactly see seems the right thing to do, thank you very much, since 2010-2012 RX 350/450h DST clock feature neither is user-intuitive, nor is user-friendly to manage when one is novice with its RX model vehicle like me. Actually it’s embarrassing to encounter such trivial question when changed the clock without any problem with all my previous vehicles.

 

Yes, you’re right, but RX 330/450h changing the DST is not user-friendly and intuitive compared with many other brands.