Pedestrian Sound Module Question
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I doubt it's smart enough to even be aware of the VIN, but where did you order it and how much did it cost? I've been wanting to mod mine as well. Right now it's simply disabled.
found it on ebay, it was salvage from one of the IIHS test cars. it was $42 + 15 shipping.
http://www.ebay.com/itm/142316862152?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT
http://www.ebay.com/itm/142316862152?_trksid=p2057872.m2749.l2649&ssPageName=STRK:MEBIDX:IT
I'd love to get one of those to play with. I would probably gut it except for the connecter and put a Raspberry Pi in there to gather data on what the pins are for. Then I could modify it and put other sounds in there, such as the Jetson's car sound, or some sort of inverter noise from a much larger electric vehicle.
Where does the module plug into the vehicle?
Where does the module plug into the vehicle?
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Bahaha.Jetson's car better be on your short list
Personally I'd pay money for one reprogrammed with the Looney Tunes Roadrunner "meep meep" sound - my wife kind of thinks the factory pedestrial warning sounds akin to it, but the real thing would be a real winner in her books.
Although Jetsons would be awesome too.
Someone could probably make big money if they designed one to take an SD card so you could change the sound at will.
Edit: Bummer, just noticed this was the gen2 forum, but I would kill for a switchable gen1 module.
I spent forever trying to figure out how to use that, because the MY16 manual says you can activate a pedestrian alert beep by flashing the high-beams. It's not a feature that exists on the car; they made it up for the manual, apparently.
Cool idea! Just looked through the junk car listings for another one, I think this is your donor car: https://wsimgproky.car-part.com/1754/2016/160941/F36FC94928FD4EB285C76B67386A36F1003_web.jpg
Looks like new about $67 plus shipping from GM sources. 2017 Chevrolet Volt Pedestrian Sound Alert Module 23321906
I wonder how difficult it will be? A pre-made playback board (or Raspberry pi type board?) enabled by the switched module power?
Theme from Tomorrowland? https://www.youtube.com/watch?v=3iUGORsHW7g (showed gen 2 volt near the end)
Looks like new about $67 plus shipping from GM sources. 2017 Chevrolet Volt Pedestrian Sound Alert Module 23321906
I wonder how difficult it will be? A pre-made playback board (or Raspberry pi type board?) enabled by the switched module power?
Theme from Tomorrowland? https://www.youtube.com/watch?v=3iUGORsHW7g (showed gen 2 volt near the end)
Maybe it would better to use the existing amplifier? (if the bandpass is usable, but it's noise, so maybe it is broad band enough to play the jetson's or other sound)
close, mine was number 160928
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Huh, the listing links to another listing:
http://www.ebay.com/itm/2017-Chevro...70410e0&pid=100012&rk=1&rkt=4&sd=142316862152
that shows a Volt which looks like it had undergone a roof strength test, yet I don't see any videos on IIHS' Youtube channel yet. Hmmm, Volt doesn't look that bad. Wonder how it rated.
That must be the one. I have just plugged the "new" module in and it seems to work.
Here is the pinout:
1 High Speed GMLAN Serial Data (*-)
2 High Speed GMLAN Serial Data (+)
3 ground
4 Serial Data Communication Enable
5 Not occupied
6 High Speed GMLAN Serial Data (*-)
7 High Speed GMLAN Serial Data (+)
8 Pedestrian Friendly Alert Speaker Control (*-)
9 Pedestrian Friendly Alert Speaker Control (+)
10 Battery Positive Voltage
Here is the pinout:
1 High Speed GMLAN Serial Data (*-)
2 High Speed GMLAN Serial Data (+)
3 ground
4 Serial Data Communication Enable
5 Not occupied
6 High Speed GMLAN Serial Data (*-)
7 High Speed GMLAN Serial Data (+)
8 Pedestrian Friendly Alert Speaker Control (*-)
9 Pedestrian Friendly Alert Speaker Control (+)
10 Battery Positive Voltage
Nice pinout! I would guess that one serial channel is probably for the artificial noise and one channel is for the charging chime. 8/9 must go to the speaker itself. I'd have to plug a Pi in to see what sort of data is transmitted still, but that helps a lot!
Interesting...I suppose maybe the module communicates with more than one other module, and they did it the lazy way and just had one LAN bus with two parallel connections...The GMLAN looks like a ring topology. 1 and 6 are connected and so are 2 and 7
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I'd be interested to get a packet dump of the communication on those pins. I can't imagine it could be anything more complicated than PRNDL position, vehicle speed, and commands to play the chime for various charge-related events. I wonder how hard it would be to sideload a module in that feeds the "chime" command in when you press a button to replace that missing "pedestrian alert" feature...
Here you go Ladies and Gentlemen, almost done, just got to add the resister to make it think the speaker is still there and seal back up the module.
https://youtu.be/Y8SnSAsPTsw
https://youtu.be/Y8SnSAsPTsw
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Oh that is sooooo rad. So does it actually cut off the audio at speeds above 20MPH or does it slowly fade out the sound? Is it simple enough for average DIY or are access to special tools like in-circuit debuggers or JTAG interfaces needed?
Thank you, audguy, for giving us confirmation that it can be done!
Thank you, audguy, for giving us confirmation that it can be done!
close enough to be DIY, it looks like a few ways of doing it. I am currently cleaning it up to see how simple it could be. It will do what ever I want, currently I am reading directly from the CAN bus for selected gear, not speed related yet. I should be able to recreate the charging beeps as well. maybe even make them abit more appropriate.
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