Video input to MFD

FWIW, when I added the XM radio to my car, you have to detach the MFD. There are four cables attached to it - two at the top that are approximately the size of the power supply cable running to your motherboard in your computer, the other two are slightly smaller - about half the size. Overall, I'd guess about 60 wires total running to/from. do not know about the NAV unit.

-m.

 

every time i see 'MFD' i think you are cursing out the display...

 

I never thought of that, but it is quite funny!!! :lol:

 

> every time i see 'MFD' i think you are cursing out the display...

Actually, quite a number of people are.

The "Multi-Display" is viewed as an empowering tool, an aspect of control taken away from the automakers that don't want you to be that well informed.

I realized the reference ages ago and stopped using it to prevent any offensive misinterpretation.

An since acronyms are problematic in my field (computer programmer), I try to avoid them unless absolutely necessary. They contribute to confusion.

Stick to "Multi-Display".

 

well, i do know what it stands for, it's just that when i look quick each time, my mind naturally gravitates to the lowest common denominator

 

yes, we priuschat folk are very tangential

 

The answer, apparently, is no. It's been asked on various threads for months.

Apparently can be done, given a lot of research and work (given that Coastal Dave is working on it), but no documents know about how to do it yet.

A more detailed thread on the subject can be found here.

 

It seems like one could cut the R,G,B,SYNC signals on the cable from nav unit connector N3, insert a video switch box and use another source of video to drive the MultiFunctionDisplay. The other source would likely need to be 60 field/second interlaced 525 scan line 1V analog video separated into R,G,B,SYNC. SYNC is mostly high (1V) with 4.5us pulses to 0V at 15.75KHz. This is based on oscilloscope views of the signals the nav unit generates on pins 2,3,7 and 8 of N3 (the 10 pin connector). The
R,G,B outputs are only active for MAP,DEST and MENU selections.

The blue connector on the left is interesting as a video possibility. It's not mentioned in the repair manual. Pins 2 and 5 have 0.1uF input capacitance and very high input resistance. I've wondered if they are NTSC video input. However, delivering DVD player video into them in various fashions doesn't change the display away from the nav map even in reverse. Maybe pins 1 and 4 are AVCLAN and need some kind of command to arrive activating the connector. They have 2.5V quiescent levels, but have 0.008uF input capacitance - 8 times higher than N3's AVCLAN pins, so maybe it's some other protocal. Pins 3 and 6 seem to be open circuits (<5pF input capacitance). Anyone know what this connector is really?

Photo:

 

Brosnan,

Do you have the wiring manual? If not, lemme know and I can pdf the pages for the MultiDisplay with Nav and email them to you. I know very little about reading wiring diagrams.

-m.

 

No problem, I'll scan and pdf them tonight - please pm me your email and I'll send it that way, just because I do believe Danny hasn't heard anything yet about the legality of posting those manuals on this site, so I don't want him to get in trouble, or me in trouble with him.

-m.

 

The input is in the nav system, under the seat.
No, I do not know why it is there. But there is an video in pin there.

(check on the prius email groups web sites....they have manual screen shots there).

dpak

 

I've looked around for the screen shots you referenced but so far can't find them. Could you help out with a link or other hint?
Thanks!

 

blue connector

The blue connector on the back of the 2004 Denso nav unit is connected to very little. As you can see in the photo below, there are many optional, unloaded components on the printed circuit board near the connector. No silkscreen clues as to the function.

 

Looks like we can also patch in to the audio for an mp3 player etc.

 

You're a programmer who doesn't use acronyms? No MQ, PHP, VB, etc. I find this somewhat difficult to believe!

 

That's the difference between Minnesota programmer [Broken External Image]:http://www.smailiki.nm.ru/anim/anim_diatel.gif and NJ programmer [Broken External Image]:http://www.smailiki.nm.ru/ico/ico04.gif.