Navigation & Daylight Savings Time

Hmmm. I thought I read in the book that is was not necessary (or even possible?) to change the time on the interior clock manually if your RL had OEM navigation (and XM). Well it's now Wednesday and I'm still on Mountain Standard Time.

I know that when I cross the boarder into Idaho (from Montana) the time sets to Pacific right away.

What's going on? :confused:

Tom

You will have to change the time manually. For some reason the navi didnt change itself this time. Just hit INFO and then you will see the menu to change the clock.

You will have to change the time manually. For some reason the navi didnt change itself this time. Just hit INFO and then you will see the menu to change the clock.

That "some reason" is that DST has been moved up three weeks, and the Navi software hasn't been updated yet. Therefore; the Navi thinks that DST hasn't started yet.

Hi Grizfan. I also was surpised that the Navi could tell when I drove into a different time zone but it could not update the new time change. On a side note, I am also a "Griz Fan". Graduated in 1990 from UofM after growing up in Butte. I am jealous that I don't have those great Montana mountains in my backyard anymore to put my Ridgeline through the paces.

That "some reason" is that DST has been moved up three weeks, and the Navi software hasn't been updated yet. Therefore; the Navi thinks that DST hasn't started yet.


Does that mean if you set the Navi clock ahead an hour manually NOW, it will be set ahead an hour AGAIN in a few weeks when the old DST date rolls around ? :confused:

On a side note, I am also a "Griz Fan". Graduated in 1990 from UofM after growing up in Butte. I am jealous that I don't have those great Montana mountains in my backyard anymore to put my Ridgeline through the paces.

That only decreases gas mileage!!! But it's a nice truck. Spring Football has begun and the Griz are looking to an even better season than last - Chattanooga here we come! BTW I graduated from U of M, when it was called MSU, in 1962!

If I'm 'jealous' of anything it's your two Porsches. I bought a used 1965 356SC in '69 after I got back from Viet Nam and made the mistake of trading it for an Audi. Oh well!!

Tom

Does that mean if you set the Navi clock ahead an hour manually NOW, it will be set ahead an hour AGAIN in a few weeks when the old DST date rolls around ?

I'll bet you are correct!! :eek:

Tom

Does that mean if you set the Navi clock ahead an hour manually NOW, it will be set ahead an hour AGAIN in a few weeks when the old DST date rolls around ? :confused:

I believe so. Either that, or when you set the time forward manually, it will automatically correct the time right away. I'll admit that I haven't bothered to set the clock in my truck forward, so I can't say what it will do.

Tom,

I still follow the Griz pretty closely and the internet sure makes that a lot easier. I wouldn't be too jealous of my Porsches. The maintenance/repair costs could buy another Ridgeline. Too bad about trading in the 356sc. That would be a great summer fun car in Montana.

Tim

I believe so. Either that, or when you set the time forward manually, it will automatically correct the time right away. I'll admit that I haven't bothered to set the clock in my truck forward, so I can't say what it will do.


I'm not sre of this but, It looks like we will need a Navi "firmware upgrade" for the new DST date to work automatically.

The following excerpt, below, was taken from: http://gpstracklog.typepad.com/gps_tracklog/2007/02/gps_dst_and_min_1.html

"One thing for sure -- your GPS will not pick up this change from the satellites. The almanac data which includes time is transmitted using Coordinated Universal Time (UTC), and the offset for local time must be set in the receiver's software."

I must say that I'm pretty amazed at this turn of events, and think that there are numerous consequences beyond the time in my truck. I am operating here on the assumption that the time in my truck (with a nav system) is set by the GPS unit. All indications are that it is. With that being said, we have had other things around here that did not reset due to programming, etc. Indeed MicroSoft had to send out patches for XP users, fro instance. However, I took one of my handheld GPS units outside and acquired the satellites and guess what?...The time was wrong on that unit, too. That means (I think) that the GPS system is still operating under the old time system, but leaving that old time alone on my handheld gives me my correct position. If, however, I change the time on my handheld manually, the GPS satellite triangulation position based on that time frame is going to place me one time zone out of position. That's a major concern for those using GPS units for more than simple mobile navigation. I hope that survey instruments, etc. are able to correct for this discrepancy. I wonder what my truck will show me if I manually adjust the time. How wrong am I with this? I would love to know more about this situation. BTW, the adjustment in your truck is under the Info/setup/more screen, and it gives you information on setting hours/minutes forward or back and sets time zone automatically. Again, I would think that it uses the GPS system for validation, which would be completely wrong if teh GPS system has not corrected the time change. Wow.:confused:

That means (I think) that the GPS system is still operating under the old time system, but leaving that old time alone on my handheld gives me my correct position... ...If, however, I change the time on my handheld manually, the GPS satellite triangulation position based on that time frame is going to place me one time zone out of position.

That is scarey. Let's suppose I'm launching a Tomahawk cruise missle at Shiraz, Iran, it will actually land in Cairo, Egypt!!! Yikes, call the Pentagon! :eek:

Tom

Yeah, isn't it? Again, I don't know if I'm right here or not, but I do know that the GPS system uses a time-based system to validate and perform it's function. I'm really amazed that the satellite system did not correct for this time change. It will be interesting to find out what happens in about two weeks during the "old" time change.

Spring Football has begun and the Griz are looking to an even better season than last - Chattanooga here we come!

You'll have to go through UMass first. :)

That was one great game in Missoula, and your fans were awesome hosts.

There are two components to the DST issue. One is the timezone, the other the time. Depending on the system, it may handle each separately. In other words, your nav may have swithed over to DST properly, but not updated the time. I wouldn't know because I don't have a factory nav. My aftermarket system was in the garage on Sunday and I had to reset it manually yesterday.

Until the Navigation software is updated this will be an issue every spring. The Navigation unit can be set to update manually or automatically. It relies on your position to set the time. I have mine set to automatic, so I expect it to change again when DST used to happen so I will have to set the clock back an hour to be correct in about three weeks. I think we should all get a firmware update as a good-will gesture but I don't expect this will happen.

The GPS satellite network does not broadcast local time.

It's up the RECEIVER to add/subtract hours to get the correct local time.

As a side note: GPS time was zero on Jan 6 1980 (0hours). GPS time can not handle leap seconds . Thus GPS time is off a few seconds from "real" time but it's off by whole seconds- 16 seconds to be exact. Don't worry - the difference between GPS time and UCT is broadcast from GPS every 12.5 minutes so a receiver can calculate UCT from GPS time - if the receiver bothers to convert GPS to UCT - I don't know if the Honda does or not.

Of course the difference is trivial since most GPS receivers put a low priority on displaying the "real" time and as a result the software subroutines for time display have low priority and the displayed time is off.

I don't know about the Honda system, but if you are bored and have a source for an accurate UCT you could sit and see how close the RL is to UCT.

You'll have to go through UMass first.
That was one great game in Missoula, and your fans were awesome hosts.

I'm afraid we'll both have to go through Appy State!!! :D

Until the Navigation software is updated this will be an issue every spring.

My guess is that we'll have to go through it in the Fall also as I believe the length of DST has been extended.

I think we should all get a firmware update as a good-will gesture but I don't expect this will happen.

Right, Honda will bundle that along with the trip computer software!! :rolleyes: Most likely, however we'll be able to purchase an updated DVD at ~$100.00 per.

Tom

It will be interesting to find out what happens in about two weeks during the "old" time change.


I haven't set my RL clock ahead an hour yet, just to see what happens.

I'll bet a dollar to a donut that it will be set ahead an hour on Sunday April 1st. - the old DST change date.


Appropriately that is April Fools Day !!! :rolleyes:

I have a handheld GPS unit from Garmin that cost less then $400. They issued an update on their web site on the March 8th. A simple couple of minute download and the issue is fixed. Why is my almost $40K truck still having the problem and solution, apparantly, is not coming any time soon?

Called American Honda about this issue today. They are working on a patch that is supposed to fix the problem. It should be available for download from the web page. No official release date. The owners are going to be notified by mail when it is available. In mean time they recommend to change the clock manually and to disable automatic daylight saving time update.

This has been added to www.hondanavi.com and the version has changed from 4.55 to 4.56. I'm assuming the dealer change is to pop in a disc one time only to copy over the program changes and you use your old disc maps. This fix may only helps those of us with 4.55 already. Or who knows they may trade you a 4.56 disc.

FAQ "The daylight Savings schedule is stored in the navi. A new software version can be loaded by your dealer to change the navi's old Daylight Savings Time schedule to the new March/November schedule. With the new version, make sure to set your "Auto Daylight" setting to "ON" in the Setup "Clock Adjustment" screen. Note: DVD versions 4.56 or later already include the new daylight savings schedule."

Also says this in the change history. "There are no additional map or POI data over the prior version 4.55"

This has been added to www.hondanavi.com and the version has changed from 4.55 to 4.56. I'm assuming the dealer change is to pop in a disc one time only to copy over the program changes and you use your old disc maps. This fix may only helps those of us with 4.55 already. Or who knows they may trade you a4.56 disc.


Wow. Thanks for the information.

"Or who knows they may trade you a 4.56 disc."

Wouldn't that be nice!!!
Not holding my breath though.

Going to look into this.

Wow. Thanks for the information.

"Or who knows they may trade you a 4.56 disc."

Wouldn't that be nice!!!
Not holding my breath though.

Going to look into this.

I'll say! :D

:cool:

I haven't set my RL clock ahead an hour yet, just to see what happens.

I'll bet a dollar to a donut that it will be set ahead an hour on Sunday April 1st. - the old DST change date.


Well, I'm on time again. :)

Went to pick up a mattress and box springs today and noticed the clock was correctly set ahead an hour.

I also found six dozen donuts in the back!!! :confused:
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April Fools on the donuts. ;) :D

My clock changed inappropriatly. It's Y2K all over.

I didn't set mine clock ahead as was suggested and have been "an hour behind" for three weeks!

But lo and behold it was right on MST on Sunday morning.

What happened to you folks who advanced yours manually?

Tom

It went another hour ahead. So without a patch it will be wrong 4 times per year with auto set to on. And twice a year if auto set off, ie typical manual change to the clock spring and fall.

My daughter's knocked up, there is change missing from my dresser and my clock got set ahead one hour.

Must be that dam Guarantee fairy again.

What movie is that from?

Hey everyone, just picked up a new Ridgeline a few weeks ago, it rocks! Found this in the Honda's Nav FAQ.

The navi is not switching Daylight Savings Time correctly anymore (in March/November), or the navi is still switching the time using the old April/October daylight savings schedule. What's wrong?

The daylight Savings schedule is stored in the navi. A new software version can be loaded by your dealer to change the navi's old Daylight Savings Time schedule to the new March/November schedule. With the new version, make sure to set your "Auto Daylight" setting to "ON" in the Setup "Clock Adjustment" screen. Note: DVD versions 4.56 or later already include the new daylight savings schedule.

Guess we'll have check the dealer next checkup or grab the latest DVD.

I got the patch today. They must have temporarily inserted another disc to do an update to the navi unit rom. The software version changed from 1.53 to 1.59. There is now a new menu item under Clock to choose the old or new schedule. It calculates the correct time on auto now. I still have the 4.55 dvd disc in my navi drive and the map database version is the same. I would assume using the "Download" option in the hidden menu may take me back to the software version on my disc so will avoid that to prevent another dealer visit. My understanding is the 4.56 disc does not include this patch.

I got the patch today. They must have temporarily inserted another disc to do an update to the navi unit rom. The software version changed from 1.53 to 1.59. There is now a new menu item under Clock to choose the old or new schedule. It calculates the correct time on auto now. I still have the 4.55 dvd disc in my navi drive and the map database version is the same. I would assume using the "Download" option in the hidden menu may take me back to the software version on my disc so will avoid that to prevent another dealer visit. My understanding is the 4.56 disc does not include this patch.
Did your dealer apply the patch for you?

Yes, Honda Carland Roswell