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garygid
Gold Member
Posts: 12469
Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Car-CAN message Decoding

Sun Jun 19, 2011 11:55 pm

This is the place to discuss the meaning of the data in the Car-CAN messages.
See SOC/GID-Meter and CAN-Do Info
2010 Prius
2011 LEAF, 2014 Tesla S85
2018 & 2019 Tesla Model 3
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
Craigslist: Xm5000Li Electric Motorcycle

User avatar
garygid
Gold Member
Posts: 12469
Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Car-CAN message Decoding

Thu Jun 30, 2011 10:36 pm

Does the Tire Pressure show up here on the Car-CAN buss?
See SOC/GID-Meter and CAN-Do Info
2010 Prius
2011 LEAF, 2014 Tesla S85
2018 & 2019 Tesla Model 3
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
Craigslist: Xm5000Li Electric Motorcycle

User avatar
garygid
Gold Member
Posts: 12469
Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Car-CAN message Decoding

Sat Aug 27, 2011 6:36 am

The SOC-Meter now displays:
SOC
Battery Pack Amps, Volts, and Power

I have seen 388 volts after "charging to 80%", and 240 amps while accelerating heavily.
Today, having charged to 100%, I should see a near-maximum Pack voltage.

NOW, the next most useful value to show for managing the LEAF is:
Battery Temperature(s)

We believe that there are 4 temperature sensors inside the Battery Pack. The Pack temperature "bars" are shown on the left side of the dashboard.

The range of one bar is so large that normal opreation and charging does not change the temp-bars. I do see a one-bar greater indication in the summer than in the late winter.

So, with Batt-Temp we could see how much the temperature is affected by:
1. L1 or L2 charging
2. Quick-Charging
3. conservative driving
4. city driving
5. freeway driving
6. climbing up hills
7. regen going down hills
8. ambient temperatures
9. sitting in the daytime sun
10. overnight cool-off

So, do you want to help find the Battery Temperature in the EV-CAN bus message data?

Try using CAN-Do on your Windows PC.
Last edited by garygid on Tue Oct 11, 2011 8:45 pm, edited 1 time in total.
See SOC/GID-Meter and CAN-Do Info
2010 Prius
2011 LEAF, 2014 Tesla S85
2018 & 2019 Tesla Model 3
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
Craigslist: Xm5000Li Electric Motorcycle

User avatar
garygid
Gold Member
Posts: 12469
Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Car-CAN message Decoding

Mon Aug 29, 2011 9:37 am

SOC 23% (66 raw) was at Battery Pack Voltage = 360 volts.
Last edited by garygid on Wed Oct 05, 2011 9:38 am, edited 1 time in total.
See SOC/GID-Meter and CAN-Do Info
2010 Prius
2011 LEAF, 2014 Tesla S85
2018 & 2019 Tesla Model 3
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
Craigslist: Xm5000Li Electric Motorcycle

MichaelS
Posts: 19
Joined: Thu Apr 29, 2010 11:20 am
Delivery Date: 15 Apr 2011
Leaf Number: 0822
Location: Hayward CA

Re: Car-CAN message Decoding

Wed Oct 05, 2011 8:45 am

Hi,
I just recieved one of Gary's units and I'm very pleased with it. It works as advertised and looks very nice.

Thanks Gary!

Michael

User avatar
garygid
Gold Member
Posts: 12469
Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Car-CAN message Decoding

Tue Oct 11, 2011 7:31 am

The LEAF's CAN buses:

1. CAR-CAN: This is one of the four CAN buses in the LEAF. It probably carries messages about windows, lights, door locks, etc. functions that any "traditional" car might have. We might find Tire Pressure Sensor (TPS) readings on this bus. It is one of the two buses that the SOC-Meter can read.

NOTE: This thread is primarily intended for discussing the meaning of messages found on the CAR-CAN bus.

The others CAN-buses are:
2. EV-CAN: This CAN-bus carries messages about the EV-related functions that are (mostly) unique to the LEAF.

3. AV-CAN: This bus is probably related to functions implemented around the Nav console. For example, possibly Heater control.

4. QC-CAN: This EV-unique CAN-bus carries messages when the LEAF's QC port is being used.
See SOC/GID-Meter and CAN-Do Info
2010 Prius
2011 LEAF, 2014 Tesla S85
2018 & 2019 Tesla Model 3
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
Craigslist: Xm5000Li Electric Motorcycle

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