Lexus GX 2004-09 :: GX470 ECU Navigation System - Screen Just Flickers
Jul 18, 2014
I was recently in a rear-end crash. The body-shop presumably disconnected the battery, fixed the rear door, and then re-connected the battery.
Now, however, the Navigation screen just flickers.
If I press Info, Audio, or Climate, the screen is just fine
If I press Menu, Dest or Display it flickers.
(Curiously, if I press Info, Audio, or Climate AND THEN press Display, the DISPLAY is fine)
Took it to the dealer, who said it was a coincidental to the body-shop repair.
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I bought a 2003 GX470 a couple of months ago and love it. It was a good upgrade from the 98 Land Cruiser I had a couple of years back and much better than my recent X5. Even though it runs great right now, I have one issue bugging me.
The Navigation unit hasn't ever really worked. Actually, it works, but since I bought it has used the secondary system which calculates location based off direction and speed which is only accurate if driving 50 yards or less - even after calibration
I found out how to get into the secret menu and looked through the settings. When I go to the screen which shows connected satellites, it says "Ensure nothing is blocking gps reception." I've tried a couple of resets, but nothing seems to work. I looked up where the antenna is to see if the connections is loose, but the only reference I found said it was on the rear glass. Unless integrated into something, I don't think it is, though.
The system still runs a factory 2003 disc for maps which is Gen 3. I tried a used 2007 map disc which upgraded the system, but didn't work. It gave disc errors so had to go back to the 2003 one. I haven't had a GPS signal since the day I bought it.
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Is it possible to turn off the display screen for the Nav system? I mean turn it completely off, so the screen is dark.
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2007 GX470
Display screen blank- radio and AC work but cant control on touch screen (its blacked out), tried a few tricks that others had suggested
like hold info and cycle lights 4x
removed positive battery cable and replaced
held menu for a minute
etc etc
Gave up. Went to dealer expecting a unpleasant $$ (buy a new nav screen) type of surprise. nope! service writer pulled it in to the shop and ....
Disconnected the NEGATIVE battery cable. Fixed it right away and didn't charge me a thing (shouldn't have anyway) He said that sometimes the computer just gets scrambled and shuts itself off as a precaution. So if you nav screen is blacked out and unresponsive give that a try.
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In sunlight my Nav screen is unreadably dim. Is this normal? I just got this 2005 GX, my first, this month and have not had the chance to compare it to others.
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Just picked up an '05 with the Nav/ML. Everything seems to work, but the navigation screen is painfully slow to update while driving. Sometimes I will be several blocks (1/4 - 1/2 mile) before it catches up with where I actually am. This doesn't seem normal, but figured I'd ask here... is this normal?
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Yesterday as I took off for work, I noticed no map on my nav screen. Below is the message I am getting. This is a 2004 and my guess is the nav has never been updated. I bought the GX 3.5 years ago as a CPO.
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What does it mean when the ac button blinks nonstop? I replaced the ac air filter behind the glove box which was filthy but ac still doesn't blow cold air.
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Right now it doesn't chance background shade when at night time, it always stays white.
How to change so that it automatically changes to black when in night time ?
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Every so often my entire Navigation system becomes unusable. The screen freezes, and audio shuts off. The screen can be turned off, but the only way to get it back working again is to turn car off for about 2 minutes and then it goes back to normal.
I can't tell if it's from overheating or not?
The car is a 2010 w/ under 3,000 miles on it. I am debating waiting until my first service and have them just look at it then. (I have full extended warranty - I am on the road a lot so I always buy them).
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C1241 is low voltage warning and C1223 is an ABS control system malfunction.
Are or could these be related? Where should I start to troubleshoot the issue?
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Rear heating system in my Lexus GX470 only blows cold air, what could be the problem. Front heater works fine.
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I find the home screen to be a great idea and I generally love it. Today, while using the navigation system, the system kept returning me to the home screen after a few minutes of not interacting with it. I'm fine with it doing this on the audio or weather apps, but when I'm actively navigating I'd rather it would stay on the nav screen until I hit the home button. I skimmed the settings and the manual but did not see this addressed anywhere. Is there a setting I am missing someplace?
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I just realized that I should be hearing the nav system giving me audible turn notifications. And I haven't been getting them. I have a destination entered, and am in the middle of being guided.
Having the audio system on/off makes no difference
I have the voice guides turned on (via Menu screen)
I have the voice volume set at 7 (via Menu screen)
Turning the speed-adaptive volume on/off makes no difference (via Menu screen)
I am on what seems to be the original DVD disc (v3.0?) that came with the car
I have what appears to be a dealer/aftermarket installed rear entertainment system (not OEM)
So:Does the nav system audio have it's own speaker and dedicated channel in the ML amplifier? Or perhaps it's own amplifier
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My wife drives a 05 GX470. Is there a way to disable the caution message (i.e. Caution: Drive safely and obey traffic rules...) that appears on the navigation screen every time you start the suv?
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How to reset and remove the error code on the tire pressure monitoring system?
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According to the navigation manual (attached), the navigation screen should go to the home screen within 5 seconds. But my IS never goes to the home screen without pressing the home button, but it always shows the full screen map. I tried many different things including "Auto Screen Change" setting but nothing seems to work.
2015 IS250 AWD
Nebula Gray/Stratus Gray
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My Santa Fe is only 2 months old, and the Navigation System/CD/Radio froze up on me already. I just had a blue screen with Hyundai written on it. I couldn't turn it on or off, or push any buttons. Nothing worked. I called the Nav System hotline number on the front of the manual, and the guy told me to try reset. I told him I already did. He said he talked to another guy who had this problem, and he just kept pushing the reset, and finally it worked. Well I must have tried a dozen times, and finally it worked. The time it worked I pushed the button while it was off, then again just as it was starting up (always just came back to blue screen before) but this time it worked.
P.S. A pen did not work, I had to use a large paper clip, and you can actually hear a "ting" and the screen goes blank, then tries to start back up (and hopefully does).
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I was playing around with the navigation system of my 06 RX400H because I read about the motion override online; however I was being stupid and chose the wrong option under the "load" menu, so the navigation system kept telling me "insert correct disk. ". Hoping that I could find a simple "reset" option there, I was playing with the diagnostic mode quite a bit. One setting allow you to select the navigation unit start up logo between Toyota, Lexus, and None. There is another interesting option called "car setting" don't know what it does.
Seemed like it let you toggle between a numerous of settings, I remember one being 9001X4WD or something. I didn't know what the setting does and accidentally changed the vehicle setting for my navigation unit. After confirming the edit, I realized that the mapping for all the buttons on my panel completed changed! First of all the map button (which wasn't working at the time because I had the wrong load option) became the "Audio" button that is similar to the audio button on my other car, 06 IS350, it showed me all my audio presets and I could choose using the touch the screen (normally this feature is disabled for RX400H).
I realized I might have screwed up the setting and wanted to change back to the original vehicle setting. I couldn't find much information online, so I figure I probably hit that set button by mistake 2 or 3 times, so I reverted the car code back to what it was 3 selections ago, and bam! My panel buttons are messed up even further! Now I don't even have access to the "info" button any more! I can still get access to the first level diagnostic mode using the "display setting" (display key is mapped to the info button now) then left upper corner + left lower corner method, however I can't change the vehicle code in this mode.
I took the car to a local dealer, and the service tech was like "what the heck did you do" and he said he don't know how to fix this except to replace the whole navigation ECU which would cost thousands of bucks. I asked him it would be as simple as getting access to the onboard ECU memory and rewrite it and he said the data format is Toyota proprietary and the dealer doesn't know how to fix it.
Of course I wasn't satisfied with the answer I got, I took the car home. Following some good information on forums and navigation ECU replace instructions on AllData, I was able to remove the navigation ECU from the car, then took it apart, disconnected the power daughter board, pushed the black reset button(?), and then put everything back together. I have seem people saying this method working and not working, but for me it did work. When I restarted the vehicle, the "loading data do not turn off" screen came on, and after the system booted, GPS navigation is working as usual now. On e interesting observation, before the GPS unit has established a connection with the satellites (took about 2-3 minutes to do so), the default location for the vehicle in the system is somewhere in Washington D.C.
Now I have undone my "load version" mistake. However, without the "info" button being mapped to the dashboard, I don't even have access to the menu where you can change the "car code", so even if I know the correct code now, I wouldn't be able to enter it. also it seems that I was able to reset the ECU when I took it apart, I am suspecting that the setting for "car code" isn't store in the ECU but it is stored somewhere instead.
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Diagnosing different minor problems with my sc430. Tthe lastest one is that my navigation screen will not tilt back so the cover will go over it. It seems like its tilted forward all the way. The screen still works and all. But the tilt button does nothing and its too far out for me to get the wood grain cover to go over it. Is this a common issue? and whats the remedy?
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Can you customize the Navigation Home Screen? Is it possible to do it on the 2015 Lexus LS 460 ?
I find it strange that my navigation home screen has the dealership name and logo on starting up the car so I figure that it could be set or change.
Is there a video or guide on how to do it? I want to put my family picture as the start up home screen.
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