Video input to MFD

Mike N · 05-22-2004, 01:43 AM

Has anybody determined if and where there is a video input to the MFD on the 2004 Prius? I hate to ask Dave at CoastalTech as he is developing products for profit. He probably knows but I don't want to put him in the position of declining the information for business reasons. Is there an input on the back of the display unit or is it on the Nav unit under the seat?

rflagg · 05-22-2004, 08:12 AM

Quote:

Has anybody determined if and where there is a video input to the MFD on the 2004 Prius? I hate to ask Dave at CoastalTech as he is developing products for profit. He probably knows but I don't want to put him in the position of declining the information for business reasons. Is there an input on the back of the display unit or is it on the Nav unit under the seat?

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. Dunno about the NAV unit.

-m.

aarons12 · 05-22-2004, 08:16 AM

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

Brian · 05-22-2004, 10:59 AM

Quote:

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

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

john1701a · 05-22-2004, 11:05 AM

> 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".

aarons12 · 05-22-2004, 11:46 AM

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

Mike N · 05-23-2004, 01:51 AM

This thread seams to have taken off on a tangent. My original question still hasn't been answered. Does anybody know where the video input to the MF MD is?

aarons12 · 05-23-2004, 09:30 AM

yes, we priuschat folk are very tangential

bookrats · 05-23-2004, 01:09 PM

Quote:

This thread seams to have taken off on a tangent. My original question still hasn't been answered. Does anybody know where the video input to the MF MD is?

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.

brosnan · 05-23-2004, 08:48 PM

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:

05-22-2004, 01:43 AM	#1
Mike N Join Date: Feb 2004 Location: Los Angeles Posts: 54 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	Video input to MFD Has anybody determined if and where there is a video input to the MFD on the 2004 Prius? I hate to ask Dave at CoastalTech as he is developing products for profit. He probably knows but I don't want to put him in the position of declining the information for business reasons. Is there an input on the back of the display unit or is it on the Nav unit under the seat?

LinkBacks (?) LinkBack to this Thread: http://priuschat.com/forums/gen-ii-prius-audio-electronics/2070-video-input-mfd.html
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Prius V.2telecamera di parcheggio posteriore	This thread	Refback	09-06-2009 05:41 PM
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05-22-2004, 08:16 AM	#3
aarons12 Join Date: Apr 2004 Location: long island, NY Posts: 705 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	every time i see 'MFD' i think you are cursing out the display...

05-22-2004, 11:05 AM	#5
john1701a Senior Member Join Date: Jan 2004 Location: Minnesota Posts: 3,376 My Car: 2010 Prius Model: IV Package: Solar Roof Thanks: 9 Thanked 145 Times in 70 Posts Friends: 12	> 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".

05-22-2004, 11:46 AM	#6
aarons12 Join Date: Apr 2004 Location: long island, NY Posts: 705 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	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

05-23-2004, 01:51 AM	#7
Mike N Join Date: Feb 2004 Location: Los Angeles Posts: 54 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	This thread seams to have taken off on a tangent. My original question still hasn't been answered. Does anybody know where the video input to the MF MD is?

05-23-2004, 09:30 AM	#8
aarons12 Join Date: Apr 2004 Location: long island, NY Posts: 705 My Car: Model: Package: Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	yes, we priuschat folk are very tangential

05-23-2004, 08:48 PM	#10
brosnan Senior Member Join Date: May 2004 Location: Silicon Valley Posts: 159 My Car: 2010 Prius Model: IV Package: Navigation Thanks: 0 Thanked 0 Times in 0 Posts Friends: 0	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: