370Z CAN Bus Proprietary PID's

Brad370

I did a little updating and added new information, plus I put the bits in the proper order. My spreadsheet is now hosted on Dropbox to make it easier for me to keep it synced.

https://www.dropbox.com/s/cfpzb2mpj4...70Z%20CAN.xlsx

So the google spreadsheet listed in your first post has been deleted.

esfourteen

awesome work! I have been side tracked with other projects but this will save me a bunch of time when i get back to my carputer. I'm using a raspberry pi, bluetooth CAN (STN1110), 10-bit 8 channel ADC and a bunch of 5v analog sensors (boost/vac, oil pressure, fuel pressure etc).

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Brad370

That's basically what my ultimate goal is. Maybe add a touch screen display into the cubby above the stereo. Or just show information on my Kenwood stereo display if the resolution is good enough.

esfourteen

yeah mine is going in a modified cubby, 7" pi compatible touchscreens with transflective panels sell for about $120 on ebay. they work great!

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Brad370

A somewhat silly use for this also occured to me since we can see the status of various buttons and switches in the car by monitoring the CAN bus. Here are 2 ideas:

This can be used to enter a 'code' to activate something or to identify the driver to the carputer. A code such as tapping the brake 5 times quickly.

Or we can repurpose buttons for something else. I found the bit that shows whether the key is inserted into the slot beneath the VDC button (I'll add it to my spreadsheet soon). It's just a button that can be pushed if you insert your finger all the way back. Just monitoring this bit can activate something and it makes for a very stealthy switch.

SouthArk370Z

Not silly at all.

The theft-deterrent idea should be pretty easy to implement with a relay in the push button or starter circuits.

You should be able to come up with a "valet mode", using some switch (or combination) to limit RPM. I'm not sure how one would limit RPM, but you seem to have enough access via CAN to do it, if it's possible.*

The possibilities are endless!



One thing that I've wanted on my 7AT is to have the current gear displayed on the dash in automatic mode, as it does when in manual mode. Not sure how the dash handles it, so it may not be possible.

*Edit: It sounds to me that what you are working on is basically a "dumb" tuner. If you know the right address to poke data into, you should be able to do everything the tuning software does, albeit without the benefit of the reverse-engineering done to identify all the "good" addresses.

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Brad370

The ECM sends the current gear to the dash repeatedly (every 55ms on my manual Z). So the problem is that even though you could send out messages disguised to look like the message from the ECU to trick it into displaying the current gear, it would immediately be replaced with the next message from the actual ECU.