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Discussion Starter #1
Hello all,

New to the Ody club :)

I've searched a few threads but hoping for some fresh answers. We just bought a 2006 Touring model. The car salesman told us when we got there that the Nav/backup screen went blank a few days ago but was working perfectly before that. He tried to troubleshoot it but could not get it to come back on. We decided to purchase the vehicle anyway because we weren't aware there was a navigation system in the first place (and the price was great)!

Sooo, now that we know we SHOULD have a nav system...we'd like to try and troubleshoot it. Here's what we know so far....

The door opens when accessing the CD and the screen displays the warning message not to use it as a cup holder. The CD player works fine. The radio works fine. The clock is lit and works fine. I checked the Nav dvd drive under the seat and took out the maps dvd and it is authentic with no scratches or fingerprints. I reinserted it and it is still black screened. I tried to push the talk button to get the system to turn on but it is silent with no beeps.

We plan on checking the fuses when it is daylight tomorrow but not quite sure which ones to check. Anyone know?

Any other ideas?

Thanks!
 

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Insert the DVD that came with the navigation system into the Honda's DVD slot.
Press and hold the "Map," "Cancel" and "Menu" buttons until the diagnostic menu appears on the screen.
Press the "Version" button on the diagnostic menu.
Press the "Download" button. The system will reinstall the navigation software from the DVD. Leave the navigation system on for about five minutes to give it time to reset.
 

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It sounds more like he's got a display issue rather than just a problem with nav.

There are three associated fuses:

Driver's side fuse box:
#7 (7.5A) & #32 (10A)

Passenger side fuse box:
#7 (7.5A)
 

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Discussion Starter #4
Insert the DVD that came with the navigation system into the Honda's DVD slot.
Press and hold the "Map," "Cancel" and "Menu" buttons until the diagnostic menu appears on the screen.
Press the "Version" button on the diagnostic menu.
Press the "Download" button. The system will reinstall the navigation software from the DVD. Leave the navigation system on for about five minutes to give it time to reset.
Thank you, pacobeagle. I turned on the van and while on I took out the Nav DVD and reinserted. I held down Map, Cancel, and Menu for about 30 sec. Nothing happened. The screen remained black. The only time something appears on the screen is when I open it to insert a CD. I get that warning not to use as a cup holder. Would I get that visual on the screen if the LCD screen was bad?

Thank you so much for your input!
 

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Discussion Starter #5
It sounds more like he's got a display issue rather than just a problem with nav.

There are three associated fuses:

Driver's side fuse box:
#7 (7.5A) & #32 (10A)

Passenger side fuse box:
#7 (7.5A)
Thank you, John Clark. We checked all of the fuses you mentioned and they all look fine. If it was a display issue, would it still give me the graphic to not use as a cup holder when opened to access the CD? Thank you for your input. Open to all ideas!
 

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Seeing you get the no cupholder graphic you would think the display is working. It should also go on when you hit the audio button on the right side. The CD changer behind the screen is audio only if it's the same as my van. The Navigation system is controlled by the DVD player under the seat. If it isn't working then multiple things can fail including backup camera. Usually this will give a code like door open or CD error but I think I've read some posts saying it does nothing. You could try unplugging the unit to reset it, I think fuse 7 on the driver's side will also reset it but will also reset the radio so you will need the security codes for both. There's a bunch of threads on this but they are in the audio/visual section. Google NAV issue and odyclub.com and you'll see a ton of hits. Some people have bought used DVD units and others have had them repaired.

Audio, Video, Security & Navigation
 

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In looking at the diagrams and reading the system operation description, it appears your issue is going to be the Navigation unit (or possibly the wiring in between.) On the 07 and up it's the DVD player under the driver's seat. I don't recall for sure where it is on the 05-06 but I think it's in the same place. The Navigation Unit is the box (DVD player) that contains the Nav DVD. That unit takes all the inputs from gauge cluster, climate control, reverse signal, vehicle speed sensor, PCM, and voice control and then outputs to the Nav display. The Audio CD changer outputs directly to the Nav display and doesn't go through the Nav Unit. That would explain why you get the cup holder message displayed but nothing from the reverse camera or the Nav unit.

If I were working on this car I'd probably scope the wires going to/from the nav unit and the nav display to see if the Nav unit is outputting anything. If nothing there then I'd probably check powers and grounds with a scope or meter. If powers and grounds check out OK it most likely needs a new Nav unit.

There is a way, however, to force start the display and then you can have the display check it's inputs (if the Nav Unit will light it up.) On the back of the Nav unit itself is a 2-pin connector that is not connected to anything. Use a jumper wire across that connector and then turn on the key. Normally, you'd see the diagnosis screen displayed. If that displays then go into the Nav System Link Diagnosis section and check all the links. If nothing is displayed then shade the display from the sun and see if the backlight comes on. I'm guessing you'll have backlighting since it works when folded down for the cupholder message. If you can see the backlight then the service manual says to replace the Nav Unit under the seat.
 

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Discussion Starter #8
Seeing you get the no cupholder graphic you would think the display is working. It should also go on when you hit the audio button on the right side. The CD changer behind the screen is audio only if it's the same as my van. The Navigation system is controlled by the DVD player under the seat. If it isn't working then multiple things can fail including backup camera. Usually this will give a code like door open or CD error but I think I've read some posts saying it does nothing. You could try unplugging the unit to reset it, I think fuse 7 on the driver's side will also reset it but will also reset the radio so you will need the security codes for both. There's a bunch of threads on this but they are in the audio/visual section. Google NAV issue and odyclub.com and you'll see a ton of hits. Some people have bought used DVD units and others have had them repaired.

Audio, Video, Security & Navigation
OdyinNH, Thanks for your reply. I tried pressing the audio button and nothing happens. I tried also pressing the talk button on the steering wheel and nothing happens. I tried pulling and reinserting the fuse on the drivers side but only had to reset the radio code...nothing on the nav screen. No error codes at all. At night I can see an ambient back light. Very faint though. To unplug the unit would I need to unscrew it from under the seat? I really couldn't see well enough to know which is the plug to remove. I have searched the forums but haven't found anything helpful yet. Any other ideas are welcome. It's looking like I'll have to purchase a new unit though. Ugh!
 

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Discussion Starter #9
In looking at the diagrams and reading the system operation description, it appears your issue is going to be the Navigation unit (or possibly the wiring in between.) On the 07 and up it's the DVD player under the driver's seat. I don't recall for sure where it is on the 05-06 but I think it's in the same place. The Navigation Unit is the box (DVD player) that contains the Nav DVD. That unit takes all the inputs from gauge cluster, climate control, reverse signal, vehicle speed sensor, PCM, and voice control and then outputs to the Nav display. The Audio CD changer outputs directly to the Nav display and doesn't go through the Nav Unit. That would explain why you get the cup holder message displayed but nothing from the reverse camera or the Nav unit.

If I were working on this car I'd probably scope the wires going to/from the nav unit and the nav display to see if the Nav unit is outputting anything. If nothing there then I'd probably check powers and grounds with a scope or meter. If powers and grounds check out OK it most likely needs a new Nav unit.

There is a way, however, to force start the display and then you can have the display check it's inputs (if the Nav Unit will light it up.) On the back of the Nav unit itself is a 2-pin connector that is not connected to anything. Use a jumper wire across that connector and then turn on the key. Normally, you'd see the diagnosis screen displayed. If that displays then go into the Nav System Link Diagnosis section and check all the links. If nothing is displayed then shade the display from the sun and see if the backlight comes on. I'm guessing you'll have backlighting since it works when folded down for the cupholder message. If you can see the backlight then the service manual says to replace the Nav Unit under the seat.
John Clark, thank you for your help. The Nav DVD unit is under the seat for the 06 as well. I'm not familiar with checking "powers and grounds with a scope or meter". Can you explain this a little more for me? I tried to look on the back of the Nav unit for that 2-pin connector but couldn't see it. Will it hurt anything if I unscrew the Nav unit and pull it out to try and jump it? By the way, there is a very faint ambient back light on. It's almost not noticeable until it's dark and you turn the van off....that's when you notice something was lit. If I do decide to replace the Nav unit, is it safe to purchase from car-part.com? If so, what is a fair price and anything to watch out for?
 

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Checking powers and grounds doesn't require a scope. Checking powers and grounds just means you check all the power and ground wires going to the nav unit. Generally, if a module is not working, you check all the power wires and all the ground wires to make sure those are good. If those are good then usually the module, in this case the Nav Unit, is the problem.

The scope would be necessary to look at the outputs to the display unit. From your descriptions it's pretty apparent it's the Nav Unit. There's nothing else in the system. You just want to check the wiring first which means checking each of the power wires and each of the ground wires, and you'd want to make sure that the signal wires from the Nav Unit to the Display Unit are not broken. If all that is good, replace the Nav Unit.

Each Nav Unit has it's own anti-theft code so you need that code to make it work when you install it. I'm sure there are used ones out there but that code is important. Otherwise you'll need to get the code from the dealer. I'm not familiar with that process or how much that costs.
 

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Curious, I know you mentioned the upper player door opens but does the ones under the seat open to access the DVD? Unless there's a wiring issue it sounds like it is dead. You can reach the cables if you have smallish hands but it's a tight space. I did pull mine out on my 07 to work on it, 4 nuts/bolts to pull it out on this year van.

BTW, there's really nothing special about the NAV on this van especially with it being 12 years old. Some people buy an aftermarket backup camera and separate GPS instead of paying the dough to repair the unit that may also have an old maps DVD in it.
 

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Yeah, the only good thing about the Nav on these vans is that it doesn't require tying up your phone while you try to navigate and it doesn't require a suction cup and cables all over the dash. It's not the best UI either. However, it's convenient, and my wife likes the convenience. I update mine every other year when they send me a letter offering a $99 update with free shipping. Last time I updated I ended up selling my old disc on eBay which made the update about $20.

If my Nav unit fails I'd probably replace it.
 

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Discussion Starter #13
Curious, I know you mentioned the upper player door opens but does the ones under the seat open to access the DVD? Unless there's a wiring issue it sounds like it is dead. You can reach the cables if you have smallish hands but it's a tight space. I did pull mine out on my 07 to work on it, 4 nuts/bolts to pull it out on this year van.

BTW, there's really nothing special about the NAV on this van especially with it being 12 years old. Some people buy an aftermarket backup camera and separate GPS instead of paying the dough to repair the unit that may also have an old maps DVD in it.
OdyinNH, Sorry just seeing your reply. Yes, the door opens to access the DVD. I've taken it out and it looks clean. I tried putting in a DVD lens cleaner today but that didn't help. I plan on removing the unit when it gets a little warmer outside because I definitely can't get my hands in there! We have a Nav system in our 09 Toyota Prius and even though I don't use it to navigate (I use good ol' google on my phone) I like the back up camera and just being able to see the map as I drive. I was thinking of looking to see if there is a nav at the junk yard. You're right, I don't want to spend a lot for it but it kinda bugs me that I have it but it doesn't work! Oh well
 

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pacobeagle, thanks, that would be awesome if I could get to that menu! I've tried holding down map, cancel, and menu but the screen remains blank.
 

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OdyinNH, Sorry just seeing your reply. Yes, the door opens to access the DVD. I've taken it out and it looks clean. I tried putting in a DVD lens cleaner today but that didn't help. I plan on removing the unit when it gets a little warmer outside because I definitely can't get my hands in there! We have a Nav system in our 09 Toyota Prius and even though I don't use it to navigate (I use good ol' google on my phone) I like the back up camera and just being able to see the map as I drive. I was thinking of looking to see if there is a nav at the junk yard. You're right, I don't want to spend a lot for it but it kinda bugs me that I have it but it doesn't work! Oh well
Mine kept saying "DVD door open" which was easily fixed. The GPS part would not work but the back up camera still did. If I remember correctly, when that unit was unplugged I got nothing on the screen. Not sure if the no cupholder thing would have come up.
 

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similiar issue but not exact....

my rear camera stopped working
when i put it in reverse...the nav screen goes black (2010 touring)

otherwise the navigation screen and the unit in general work fine.
dvd player in the rear works fine.
i looked at the 7.5a on the driver side footwell...no issues visually.

no work done to the van.

i opened up the tailgate covers and unplugged the camera...then put ti into reverse...nothing happens on the screen...it stays on the regular navigation screen...then i plugged it in again...and just the pure black screen
 

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wow camera prices are brutal....at the dealer on account it's $800....aftermarket (dorman) is close to $250...

is there any way I can check to see if it is my actual camera gone bad?
is there any way I can buy an aftermarket camera kit and connected it to the same plug (so it powers up in my touring nav screen)
 

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I haven't done any more diagonising on this but i've noticed that sometimes when I put the van into reverse, I can see the screen flick on very quickly then go black....i mean really quick, like a split second i see some of the rear view then all black
 

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sooo....my camera just started working again today (it's a nice hot sunny day here - not sure if that matters)
 
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