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Discussion Starter · #1 ·
A friend of mine who owns a GS300 showed me how he overrides his navigation so he can use it while driving by going through the volume control. Is there a similar process in our IS-F to make this happen, instead of going to a shop or dealership to have them do it?
 

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There is no override by going through the volume control that I know of. I purchased the nav override system from prestigious society and installed it with help of a friend. It works perfectly. It allows you to change songs on your ipod while driving, play dvd's while driving, input points of interest for the nav, and type telephone numbers for the phone while driving. It's a great mod to our nav systems, and it's plug-n-play, no wire splicing or anything, so it's easy to go back to stock if needed.
 

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the website does not list the F as a compatible model, but it works in yours vsl, no hiccups?

general question to all about warranty. i never did the splice b/c of that issue.
do you think that you can void the warranty installing this device? i mean this kind of scenario. you install the device, some time later have a nav/radio/dvd problem. you return to stock and bring to the dealership. is there some way they would know the unit was pulled out to install the override system. some kind of seal or sticker that gets broken off if you remove it? anyone here that did the fix notice anything like that?
 

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in the pic of it,
what does the tv switch looking thing do?, where does it go? and what is the box thing for?
i dont want switches popping out of my nav unit
 

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the website does not list the F as a compatible model, but it works in yours vsl, no hiccups?

general question to all about warranty. i never did the splice b/c of that issue.
do you think that you can void the warranty installing this device? i mean this kind of scenario. you install the device, some time later have a nav/radio/dvd problem. you return to stock and bring to the dealership. is there some way they would know the unit was pulled out to install the override system. some kind of seal or sticker that gets broken off if you remove it? anyone here that did the fix notice anything like that?
Actually, it does lists the ISF as a compatible model. If you go to the website, click on "more info" below the pic of the override unit, it will download a PDF file that tells more about the unit. ISF is listed on there. I actually called them before I purchased it and they confirmed that it worked for the F. Having installed it, I assure you it works perfectly. As far as a seal or sticker is concerned... there is not one. There is no way the dealership is going to know you pulled the nav unit out. There are plenty of people on clublexus that have done this as well... you will be OK.
 

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in the pic of it,
what does the tv switch looking thing do?, where does it go? and what is the box thing for?
i dont want switches popping out of my nav unit
The "tv switch looking thing" is the toggle to control the override unit. The Navi button overrides the nav system... the TV button allows you to play DVD's while driving. You can mount the toggle anywhere you want. I personally wired mine into the center console... so there are no switches or wires popping out of the nav unit. Everything is completely hidden, unless you open up my center console.

The "box thing" is the control for the override unit. It's completely hidden behind the nav unit and it perfectly affixes to the top back of the navi unit with double sided tape. By the way, prestigious society gives you step by step directions on how to install this unit.
 

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A quick related question to VSL-F and others that have the prestigious society bypass -

Is the nav bypass always on or is it similar to the wiring harness hack where you have a switch to turn it on and off?
 

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Yes the NAV/DVD bypass is a plug and play item which you can switch on and off. It does the same operation like doing the wire cutting method.
 

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A friend of mine who owns a GS300 showed me how he overrides his navigation so he can use it while driving by going through the volume control. Is there a similar process in our IS-F to make this happen, instead of going to a shop or dealership to have them do it?
That method only works on early Lexus Gen 5 nav systems (06 GS, 06 IS and Early 07 RX w/Gen5 nav only) with the v.5.1 NAV disc. v.6.1 and greater eliminate that feature all together.
 

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That method only works on early Lexus Gen 5 nav systems (06 GS, 06 IS and Early 07 RX w/Gen5 nav only) with the v.5.1 NAV disc. v.6.1 and greater eliminate that feature all together.
That is a shame....there must be some secret easter egg type combination. I wonder if the disabling of the parts of the navi happens in Europe and Africa? Is it a North American thing only? We need someone with a direct connection to the Lexus techs...the ones who designed these systems.
 

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bought mine on ebay

Checked and it isn't available anymore. Saved quite a bit buying it new on ebay. I would vouch for the bypass. I love mine and would suggest it to anyone. I would suggest that you have a friend help with the install. Search this site and CL for instructions on how to take the dash apart. It only took me less than an hour for the complete install.
 

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You will not void a warranty unless your splicing into something and it causes a short or something of that nature. Plug and play units are fine. The only thing you are doing is removing LEXUS from ANY Liability if you cause/get into an accident.
 

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That is a shame....there must be some secret easter egg type combination. I wonder if the disabling of the parts of the navi happens in Europe and Africa? Is it a North American thing only? We need someone with a direct connection to the Lexus techs...the ones who designed these systems.
There used to be, which is why it was eliminated for the later Gen 5 nav and v.6.1 and later versions of the nav disc.

Europe, Africa and the other markets have NAV systems sourced by different companies. For instance, Denso and Fujitsu handle North America. Aisin handles Europe and Australia uses Denso. So in essence, the Nav disc for one region is not compatible in another.
 

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Yes the NAV/DVD bypass is a plug and play item which you can switch on and off. It does the same operation like doing the wire cutting method.
I guess that is as good as it is going to get. I was hoping that it would allow use of the nav while in motion, but wouldn't require switching back and forth between modes.
 

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I guess that is as good as it is going to get. I was hoping that it would allow use of the nav while in motion, but wouldn't require switching back and forth between modes.
You can use both simultaneously. Obviously you can't look at DVD's while you're accessing the NAV screen, but you can have both the DVD override and the NAV override on at the same time.
 

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Do you have any issues with the NAV locating your location after installing the unit? I heard for the people that just splice the wires and join them together the NAV is still disabled, but quite a few other functions are enabled while driving.

I read somewhere else where someone installed a generic switch between the two wires your splice and that was the only way you could fully enable NAV and other functions while driving, but you have to flip the switch back and forth every few minutes. I guess the car finally figures out you're moving and disables functions again.
 

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Discussion Starter · #19 ·
Thanks for all the information, guys! I guess there's really no way to go around it but to buy and install the bypass unit.
 

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Discussion Starter · #20 ·
Do you have any issues with the NAV locating your location after installing the unit?
I was wondering why you mentioned this, but now I know. Two nights ago, on my way to the hospital about 20 miles away, I used the override to allow my wife to enter a POI. It took her more than 5 minutes to search so I pressed the override switch again (after it turned off) for an extended 5 minutes. I pushed the swich again to turn the override off as soon as my wife was done and waited for the navigation to recalibrate our correct location, but it never happened. The "GPS" indicator below the compass on the screen never showed either. We arrived at our destination with our map location totally off. It was frustrating! Is it my navigation, or is it the override that's the problem? Please advise.
 
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