370Z CAN Bus Proprietary PID's

sig11 · 10-09-2015, 04:37 PM

Wow! You guys have made some great progress. I just started to look for info on the 350Z CAN bus but ran back across this thread and started to work on my OpenXC firmware for the 370 based on Brad's spreadsheet.

I think OpenXC is dropping messages where the dlc != 8 but I haven't finished tearing into it yet.

Paul_S · 10-10-2015, 04:58 AM

Fantastic progress guys!

I've been away from this project but am back on board now. If there's anything I can do let me know

Quote:

Originally Posted by Brad370

I was going to go the route of building custom hardware, but then I searched for refurbished Android tablets and ended up finding a Galaxy Tab 4 (7" tablet) for under $100. I'm pairing that with an OBDLink LX Bluetooth scan tool. So far this setup seems like it will work.

Mobile programming is a huge pain and I'm not liking it so far as I slowly learn it, but you can't beat the built-in graphics, touch, and BT capabilities.

I've got an Android tablet in my 370Z now. (I might be repeating myself here...) Mine is an early one without Connect Premium. I'm doing it like this:

I've hit some problems with the whole USB OTG and power combination as well as standby power issues but I'm getting there slowly (see here).

So I'd vote to go Android!

Knio · 10-30-2015, 12:51 AM

Quote:

Originally Posted by Paul_S

I've hit some problems with the whole USB OTG and power combination as well as standby power issues but I'm getting there slowly (see here).

So I'd vote to go Android!

I had these same issues (though with a windows tablet) and think I finally solved them. (incredibly annoying)

1) I found an OTG USB hub that takes external power, and powers both the tablet + peripheral devices, with a built in relay. It needs to trick the host USB controller though, so only works on a few specific models of tablets.

2) USB chargers suck, and USB cables suck. at 1A of power, if you have even 1 Ohm of resistance in all your cabling and connectors, you're only getting 4V at the end. Even with the best cables I could find, I was only getting ~4.6V at the tablet, and that wasn't enough to make it charge. I ended up solving this from both sides:

- I made my own USB cables using 18Ga wires
- I got an adjustable buck converter, so I can run the source at 5.25V, and then it's still 5.0V at the tablet after all the losses.

Knio · 11-05-2015, 12:36 AM

0x245 F=64 when stability control activates

SouthArk370Z · 04-21-2016, 08:21 PM

Everything I know about OBD/CAN can be found at the wiki link in my sig. I haven't updated the site in quite some time but what's there should still be valid.

Going by your description of readSaePid, it sounds like it is used to concatenate data, possibly for display purposes. But that's just a guess.

Uxi · 08-19-2016, 11:10 AM

Great project. I am interested in doing some of this on my Nismo Tech.

dts3 · 05-31-2018, 05:54 PM

Has this gone anywhere? I just got my Z last week and I would like to get in on this! I write firmware for brake controller ECUs (nothing for Nissan), so I have a little experience.

Sent from my Pixel XL using Tapatalk

Knio · 05-31-2018, 10:03 PM

Quote:

Originally Posted by dts3

Has this gone anywhere? I just got my Z last week and I would like to get in on this! I write firmware for brake controller ECUs (nothing for Nissan), so I have a little experience.

I haven't heard of any further progress on this in a long time, but I think we have a pretty good understanding of the CAN architecture and signals built up. Is there anything specific that you're looking for?

Uxi · 06-11-2018, 09:57 AM

Is the progress being documented somewhere other than this page? Would love to see the PID to see tire pressures, for example.

Knio · 06-11-2018, 11:16 AM

Quote:

Originally Posted by Uxi

Is the progress being documented somewhere other than this page? Would love to see the PID to see tire pressures, for example.

Brad's dropbox sheet is probably the best documentation. TPMS is CAN ID 385

dts3 · 07-26-2018, 08:27 PM

Quote:

Originally Posted by Knio

Brad's dropbox sheet is probably the best documentation. TPMS is CAN ID 385

For what it's worth, I can't seem to get anything meaningful from 0x385. The values always read 4. Everything else I've looked at agrees perfectly with what is there.

Sent from my Pixel XL using Tapatalk

Brad370 · 08-05-2018, 04:32 PM

Quote:

Originally Posted by dts3

I can't seem to get anything meaningful from 0x385. The values always read 4.

Did you get your tires replaced and not transfer over the sensors?

dts3 · 10-05-2018, 10:09 AM

Quote:

Originally Posted by Brad370

Did you get your tires replaced and not transfer over the sensors?

Sorry, just now seeing this. I'm the second owner so I don't know the state of the sensors. I assumed that I'd get warning lights if they were missing

GrayGhost · 10-29-2018, 03:07 PM

Great work and information here everyone!

I see that you were able to read when a commands like ‘unlock doors’ ‘open trunk’ were issued but has anyone determined how to send the commands over the obd2?

Also, i am aware of how to request pid information to the obd2 (in theory but not in practice yet) but how do you listen to the can bus data?

Sent from my iPhone using Tapatalk

dts3 · 10-29-2018, 04:16 PM

I personally have access to some decent CAN tools through work (write software for braking control ECUs), so I borrowed them one night to pull data. I didn't send any messages, but it's simple with decent tools. What are you working with?

11-05-2015, 12:36 AM	#4 (permalink)
Knio Base Member Join Date: May 2011 Location: Palo Alto, CA Posts: 141 Drives: 40th Rep Power: 14	0x245 F=64 when stability control activates SouthArk370Z likes this.

04-21-2016, 08:21 PM	#5 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Everything I know about OBD/CAN can be found at the wiki link in my sig. I haven't updated the site in quite some time but what's there should still be valid. Going by your description of readSaePid, it sounds like it is used to concatenate data, possibly for display purposes. But that's just a guess. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

05-31-2018, 05:54 PM	#7 (permalink)
dts3 Track Member Join Date: May 2018 Location: Farmington Hills, MI Posts: 599 Drives: 08 Expedition Rep Power: 6765	Has this gone anywhere? I just got my Z last week and I would like to get in on this! I write firmware for brake controller ECUs (nothing for Nissan), so I have a little experience. Sent from my Pixel XL using Tapatalk __________________ Visit my blog! www.LeftoverPi.com Last edited by dts3; 05-31-2018 at 05:57 PM.

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10-09-2015, 04:37 PM	#1 (permalink)
sig11 A True Z Fanatic Join Date: Jun 2009 Location: Detroit Posts: 1,294 Drives: 09 370Z Red Sport-MT Rep Power: 18	Wow! You guys have made some great progress. I just started to look for info on the 350Z CAN bus but ran back across this thread and started to work on my OpenXC firmware for the 370 based on Brad's spreadsheet. I think OpenXC is dropping messages where the dlc != 8 but I haven't finished tearing into it yet.

08-19-2016, 11:10 AM	#6 (permalink)
Uxi Enthusiast Member Join Date: Apr 2015 Location: Southern California Posts: 303 Drives: 16 NISMO Tech PW 6MT Rep Power: 3598	Great project. I am interested in doing some of this on my Nismo Tech.

06-11-2018, 09:57 AM	#9 (permalink)
Uxi Enthusiast Member Join Date: Apr 2015 Location: Southern California Posts: 303 Drives: 16 NISMO Tech PW 6MT Rep Power: 3598	Is the progress being documented somewhere other than this page? Would love to see the PID to see tire pressures, for example.

10-29-2018, 03:07 PM	#14 (permalink)
GrayGhost Base Member Join Date: Sep 2017 Location: Florida Posts: 106 Drives: 40TH Rep Power: 8	Great work and information here everyone! I see that you were able to read when a commands like ‘unlock doors’ ‘open trunk’ were issued but has anyone determined how to send the commands over the obd2? Also, i am aware of how to request pid information to the obd2 (in theory but not in practice yet) but how do you listen to the can bus data? Sent from my iPhone using Tapatalk

10-29-2018, 04:16 PM	#15 (permalink)
dts3 Track Member Join Date: May 2018 Location: Farmington Hills, MI Posts: 599 Drives: 08 Expedition Rep Power: 6765	I personally have access to some decent CAN tools through work (write software for braking control ECUs), so I borrowed them one night to pull data. I didn't send any messages, but it's simple with decent tools. What are you working with?