Lexus GX 2004-09 :: 2003 GX470 Navigation System - GPS Signal Lost
Feb 8, 2014
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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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 have had a problematic navigation system that loses it way some times (loss of GPS signal). However it worked for sometime without problems till I dent my rear left side and had to be in the shop. I guess they disconnected the batteries and now the unit has stopped working. This is the relevant VCDS output. Most importantly I checked the adv measure feature to find the following statuses
CD ROM OK
GPS Antennae OK
Available Satellites 8
Satellites in view 0
GPS Status None
This was a clear day and so the unit is not picking up the satellites. However VCDS output shows no faults or anything.
Address 37: Navigation
Labels: 3D0-919-887.lbl
Part No: 3D0 919 887 A
Component: NAVIGATION 9968
Coding: 0400000
Shop #: WSC 02134 444 59226
VCID: 326BD7F1AE43028E5D3-5140
No fault code found
[Code] .....
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I have a 2010 prius with the navigation package in the last month the compass goes berserk and the the navigation gets completely lost. I have done the recalibration and it may work for an hour or a day then just start wondering.
The xm radio works fine and when I get into the system check page by pressing info while turning the light switch from off to side lights four times all the systems say they are OK and the gyro voltage and direction looks good. This problem is with the original map cd and the versionb11.1 cd.
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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 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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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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Alright so pretty much every night my alarm on my 2003 lexus gx470 keeps going off i just want to unhook. Where I can unhook the alarm at so it stops going off is it under the dash or where?
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When I started the vehicle this morning and shifted into reverse, nothing happened. I turned the car off and restarted it. It made a noise and I shifted back into park. The A/T P light came on.
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My rear air suspension keeps dropping. Sometimes my suspension goes down all the way when parked, but not all the time. When I start the car it goes back up. It's a 2003 GX470.
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Just purchased a 2003 GX470 with 160k and after the low brake fluid light came on I noticed the master cylinder had a leak. After removing the cover it appears the fluid has leaked for quite some time as the paint has started pealing from the frame. The brakes however appear to be working correctly. Upon purchase the front calipers were seized and I replaced both front calipers.
After having someone depress the brake pedal while I watched, the fluid leaks from the end of the master cylinder each time pedal is pressed in.
After doing some research it appears there is a rebuild kit for the master cylinder.
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I have a 2004 VW Phaeton.
Today, the sound system failed, then shortly after, the navigation system failed.
On the console, if I press any map/navigation buttons, the error message "Navigation System Unavailable" is displayed.
If I press an audio related button, the error message "DSP system is unavailable". I took it to a private vw repair shop and a vw dealer. What was causing the issue.
I am now headed to a vw dealer with certified phaeton tech. I looked towards fuse issue, but they appear to be ok..
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My 03 GX470 has an issue where the windshield wipers will randomly stop working. It doesn't matter what setting they are on, auto, low, high, they work fine for a few minutes, then just stop mid stroke. They sometimes start back again on their own after a minute or so, but usually, I have to turn the switch to other settings a few times, to get it going again. Inevitably though, the wipers only work for a few minutes more, before stopping again. What could be causing this?
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Changed the battery in my 2003 GX 470 today and all hell has broken loose. I have been able to reset my windows and moon roof but my Nav has a mind of its own.
MAP, DEST and MENU screens are all blank. However CLIMATE, AUDIO, DISPLAY works perfectly.
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Like the subject says, I have been noticing over the last 2 months in my 03 GX470 that the interior lights and open door dash light come on when accelerating.
-The issue is exacerbated in cold weather. I have double checked all doors and rear hatch are closed.
-I have gone around and checked all door sensors are functioning, not sticky, etc.
-I climbed in the rear hatch and had my wife shut it. When I push on the plastic under the window, the lights come on. When I push on the glass itself (and push MUCH harder then on the plastic) the lights do not come on.
Clearly I have an issue in the rear hatch trim area.
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I bought my first Lexus, great car. 2003 GX470 with 106k. I have had one problem with the fuse for the dome light. This issue has been on going since I bought the vehicle a couple months back and I can usually fix the problem by just replacing the fuse. Now when I try to replace the fuse, the fuse sparks and blows before I can even put it into the slot. Obviously there is something going on here that won't allow the fuse to be inserted before blowing. How to rectify this issue?
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I would like to post this performance issue on my 2003 GX470_79Kmiles which happened on the freeway yesterday. The sequence:
1) During start and at idle/stationary, the rpm shoot to 1100rpm and stayed there for a while, i would think that it was normal since the engine was still cold.
2) Drove to the freeway, I noticed that speed is very slow to pick up. My normal driving experience was that at close/equal to 2000rpm, the speed usually at around 70-75mph. But there was a considerable reduction of speed at around 60mph at almost more than 2000rpm, plus a buzzing engine noise. I tried to really rev-up the engine but very sluggish to pick up the speed not even close to 70mph.
3) Drove the car to lexus shop this morning, top speed of 60 to 65mph and tried to rev it up to plus 2000rpm to pick up speed, but the engine noise is very abnormal.
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I have recently decided to not renew any XM services on my 13 GS. One unintended consequence of that decision seems to be a surprise. My slow start of the navigation system is gone. The system starts up instantly every time. I have observed it for 4 days now, and not a single slow start. Not sure if the problem is in the XM receiver, or the way the navigation tries to consume the XM data services, but it's definitely related to XM.
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