Navigation won’t Dim, PLEASE help
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Driver School Candidate
Joined: Jul 2018
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From: VA
Navigation won’t Dim, PLEASE help
so my navigation will not dim, no matter if I turn the dimmer switch in either direction. (And yes, it clicks) no matter if I turn the headlights on, off or auto. There’s also no sign of the night mode button in the display menu either.
interestingly enough, the instrument cluster responds normally to the dimmer switch and even the clock below the navigation system. BUT the Navi itself is completely unaffected..
Ive tried everything, from disconnecting the battery to connecting techstream to find a fault. No good
I do have access to AllData with virtually every wiring diagram imaginable so if anyone has an idea I can probably make it happen... I’m just all out of ideas.
Oh yeah, I’ve removed the radio before but at this point I’ve gone back behind it again to verify everything is as it should be. It all looks fine. I’m hoping someone know how to narrow the function down to a couple of wires. But “any help” will be greatly appreciated
interestingly enough, the instrument cluster responds normally to the dimmer switch and even the clock below the navigation system. BUT the Navi itself is completely unaffected..
Ive tried everything, from disconnecting the battery to connecting techstream to find a fault. No good
I do have access to AllData with virtually every wiring diagram imaginable so if anyone has an idea I can probably make it happen... I’m just all out of ideas.
Oh yeah, I’ve removed the radio before but at this point I’ve gone back behind it again to verify everything is as it should be. It all looks fine. I’m hoping someone know how to narrow the function down to a couple of wires. But “any help” will be greatly appreciated
The sensor on the defrost vent at the base of the windshield dims and brightens the instruments?
In the touch screen menu under DISPLAY, there is a toggle button for auto dim. You check that?
In the touch screen menu under DISPLAY, there is a toggle button for auto dim. You check that?
Thread Starter
Driver School Candidate
Joined: Jul 2018
Posts: 30
Likes: 2
From: VA
I was troubleshooting this thing for hours!!
the sensor your referring to is connected and seems to be working just fine.
i say that because when i cover it up, The headlights come on, the dash lights dim AND the clock near the radio dims as well.
so basically everything is dimming as normal EXCEPT the navigation
Last edited by SudoBailey; Oct 14, 2018 at 11:43 PM.
Thread Starter
Driver School Candidate
Joined: Jul 2018
Posts: 30
Likes: 2
From: VA
I been meaning to mention
none of the lights work on the radio or climate control buttons... you wouldn’t believe how annoying it is trying to cut on the defrost while riding down a dark road.
Are there any Lexus technicians that can give me a clue as to what may be causing this issue or perhaps a workaround to get the lights working on the radio?
also, I don’t remember if I mentioned this, but the small clock located on the multimedia center face just to the left of the hazard switch. It dims and works normally.
which is really weird because it tells me that the dimmer switch is definitely sending a signal to the radio.
Are there any Lexus technicians that can give me a clue as to what may be causing this issue or perhaps a workaround to get the lights working on the radio?
also, I don’t remember if I mentioned this, but the small clock located on the multimedia center face just to the left of the hazard switch. It dims and works normally.
which is really weird because it tells me that the dimmer switch is definitely sending a signal to the radio.
Thread Starter
Driver School Candidate
Joined: Jul 2018
Posts: 30
Likes: 2
From: VA
I’ve got every wiring diagram imaginable and I’ve checked continuity on the dimmer switch and a few associated components.
i can’t figure this thing out... I was sure at the very least I’d find a way to manually invoke night mode. Especially since the dimmer switch seems to run on ground current.
but no matter what I do I can’t get the screen to dim, can’t get the buttons to light up on the radio and my whole navigation system is being rendered pretty much useless at night.
im really surprised no one here has any suggestions on how to manually invoke night mode. Maybe I’ll upload the navigation wiring diagrams and someone else may notice something I missed. Or it could help them with another project.
i can’t figure this thing out... I was sure at the very least I’d find a way to manually invoke night mode. Especially since the dimmer switch seems to run on ground current.
but no matter what I do I can’t get the screen to dim, can’t get the buttons to light up on the radio and my whole navigation system is being rendered pretty much useless at night.
im really surprised no one here has any suggestions on how to manually invoke night mode. Maybe I’ll upload the navigation wiring diagrams and someone else may notice something I missed. Or it could help them with another project.
I’ve got every wiring diagram imaginable and I’ve checked continuity on the dimmer switch and a few associated components.
i can’t figure this thing out... I was sure at the very least I’d find a way to manually invoke night mode. Especially since the dimmer switch seems to run on ground current.
but no matter what I do I can’t get the screen to dim, can’t get the buttons to light up on the radio and my whole navigation system is being rendered pretty much useless at night.
im really surprised no one here has any suggestions on how to manually invoke night mode. Maybe I’ll upload the navigation wiring diagrams and someone else may notice something I missed. Or it could help them with another project.
i can’t figure this thing out... I was sure at the very least I’d find a way to manually invoke night mode. Especially since the dimmer switch seems to run on ground current.
but no matter what I do I can’t get the screen to dim, can’t get the buttons to light up on the radio and my whole navigation system is being rendered pretty much useless at night.
im really surprised no one here has any suggestions on how to manually invoke night mode. Maybe I’ll upload the navigation wiring diagrams and someone else may notice something I missed. Or it could help them with another project.
If you got schematics from TIS website, did you notice a step by step troubleshooting process? It could be that a component has failed. This would not be easily depicted by the schematics.
Thread Starter
Driver School Candidate
Joined: Jul 2018
Posts: 30
Likes: 2
From: VA
Actually ive been using alldata to troubleshoot... but you’ve got a good point there. Thanks. I’ll pm you to see if there’s anymore where that came from.
im so frustrated at this point I’m tempted to replace the whole media center... well, almost lol
im so frustrated at this point I’m tempted to replace the whole media center... well, almost lol
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Thread Starter
Driver School Candidate
Joined: Jul 2018
Posts: 30
Likes: 2
From: VA
Sorry for the delay, I couldn't upload the schematics on my phone earlier.
I noticed something else really interesting. I'm not able to access the hidden menu anymore.
your're suppose to be able to hold the info button and cycle the headlight then a special menu pops up. well... it's not working.
just a little extra info to help solve this riddle.
btw the file i uploaded is really fuzzy because i had to reduce the quality in order to upload it. if anyone needs a better copy pm me.
Thread Starter
Driver School Candidate
Joined: Jul 2018
Posts: 30
Likes: 2
From: VA
Okay, after hour and hours of agonizing testing. Scouting countless diagrams and back probing so many sensors...
after removing all of my modifications so I can take my car to a dealer and let them overcharge me for an electrical diagnostic.
I regret to admit, I found the problem. Fortunately, I found it before I went to the stealer.
somehow, I neglected to check one of the fuse panels. Our IS250 or any other 2IS comes with at least three fuse panels. One under the hood and one near each kick panel in the front seats. The DRIVER side has a 7.5amp fuse labeled “panel.”
thats the fuse responsible for this functionality.
how silly of me... oh well, all is well that ends well, right?
after removing all of my modifications so I can take my car to a dealer and let them overcharge me for an electrical diagnostic.
I regret to admit, I found the problem. Fortunately, I found it before I went to the stealer.
somehow, I neglected to check one of the fuse panels. Our IS250 or any other 2IS comes with at least three fuse panels. One under the hood and one near each kick panel in the front seats. The DRIVER side has a 7.5amp fuse labeled “panel.”
thats the fuse responsible for this functionality.
how silly of me... oh well, all is well that ends well, right?
Thread Starter
Driver School Candidate
Joined: Jul 2018
Posts: 30
Likes: 2
From: VA
Okay, after hour and hours of agonizing testing. Scouting countless diagrams and back probing so many sensors...
after removing all of my modifications so I can take my car to a dealer and let them overcharge me for an electrical diagnostic.
I regret to admit, I found the problem. Fortunately, I found it before I went to the stealer.
somehow, I neglected to check one of the fuse panels. Our IS250 or any other 2IS comes with at least three fuse panels. One under the hood and one near each kick panel in the front seats. The DRIVER side has a 7.5amp fuse labeled “panel.”
thats the fuse responsible for this functionality.
how silly of me... oh well, all is well that ends well, right?
after removing all of my modifications so I can take my car to a dealer and let them overcharge me for an electrical diagnostic.
I regret to admit, I found the problem. Fortunately, I found it before I went to the stealer.
somehow, I neglected to check one of the fuse panels. Our IS250 or any other 2IS comes with at least three fuse panels. One under the hood and one near each kick panel in the front seats. The DRIVER side has a 7.5amp fuse labeled “panel.”
thats the fuse responsible for this functionality.
how silly of me... oh well, all is well that ends well, right?
Okay, after hour and hours of agonizing testing. Scouting countless diagrams and back probing so many sensors...
after removing all of my modifications so I can take my car to a dealer and let them overcharge me for an electrical diagnostic.
I regret to admit, I found the problem. Fortunately, I found it before I went to the stealer.
somehow, I neglected to check one of the fuse panels. Our IS250 or any other 2IS comes with at least three fuse panels. One under the hood and one near each kick panel in the front seats. The DRIVER side has a 7.5amp fuse labeled “panel.”
thats the fuse responsible for this functionality.
how silly of me... oh well, all is well that ends well, right?
after removing all of my modifications so I can take my car to a dealer and let them overcharge me for an electrical diagnostic.
I regret to admit, I found the problem. Fortunately, I found it before I went to the stealer.
somehow, I neglected to check one of the fuse panels. Our IS250 or any other 2IS comes with at least three fuse panels. One under the hood and one near each kick panel in the front seats. The DRIVER side has a 7.5amp fuse labeled “panel.”
thats the fuse responsible for this functionality.
how silly of me... oh well, all is well that ends well, right?
Better late than never, right!??
So what interior mods are done that you pulled? Are they related to the fuse being compromised?
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