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turbo2ltr
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Delivery Date: 04 Feb 2011
Leaf Number: 185
Location: Phoenix, AZ

Re: My findings on the CAN bus

Sun Feb 20, 2011 10:47 pm

I have decoded how to override the time to charge times. It was one of the options I wanted to test. For me the more preferable gauge to override was the temperature. Unfortunately according to the service manual, the temperature doesn't get updated unless the car is moving at least 12 MPH! That will make it difficult to find the proper message...unless I put the car on jack stand and set the cruise to 15mph.. lol

Dude, if I could find how to press agree through CAN I'd be the happiest man alive. I don't understand why on earth they did that. It's so friggin annoying. Unfortunately, it's probably not going to happen.

The VSP, maybe. But its probably easier to disconnect the speaker.
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garygid
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Re: My findings on the CAN bus

Sun Feb 20, 2011 10:52 pm

A list/display of all 96 cell-pair voltages, and the 4 Pack temperatures would be really great.
See SOC/GID-Meter and CAN-Do Info
2010 Prius
2011 LEAF, 2014 Tesla S85
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AndyH
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Joined: Fri Apr 23, 2010 3:43 pm
Location: San Antonio

Re: My findings on the CAN bus

Mon Feb 21, 2011 1:33 pm

garygid wrote:A list/display of all 96 cell-pair voltages, and the 4 Pack temperatures would be really great.
I thought I wanted a real-time view of my cell voltages as well. Now that I have it, I find that it's not worth looking at. All I want is an indication of a cell out of range - and an automatic response if it happens. And that's exactly what the Leaf does.

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turbo2ltr
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Joined: Fri Jul 30, 2010 11:13 pm
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Re: My findings on the CAN bus

Wed Feb 23, 2011 11:28 pm

Looks like both my ideas aren't going to work.

When I finally thought about it, I realized the charge timer can only go up to "59" before to rolls over to 1:00...so that won't work.

I messed with the ambient temperature today and got nowhere. There is something seriously messed up with it. It read 61 when i started. After messing with some messages, it suddenly dropped to 41. But I don't think it had anything to do with me. I messed with it for another 1/2 hour and it just naturally went up to 43. I gave up and headed home. I went three miles on the highway, and I watched it count up 43,45,48,50, to 53 in a matter of about 45 seconds right after I got off the highway. :?:

Anyway, I haven't given up totally on the temp sensor display, but I don't see any other messages I could "hijack" to display the SOC on the dash...with the exception of the range. But that message gets transmitted quite often so it might be hard to override cleanly.
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Ford F450 Crew Cab Hybrid Conversion

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planet4ever
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Delivery Date: 02 May 2011
Leaf Number: 1537
Location: Morgan Hill, CA, south of San Jose

Re: My findings on the CAN bus

Thu Feb 24, 2011 3:07 am

I had a Scan Gauge mounted on my dash for two years, and was satisfied with that. I'll be happy to pay you for an external SOC gauge plugged in wherever.

Ray
End of April 2013: Traded my 2011 SL for a 2013 S with charge pkg.

kolmstead
Posts: 479
Joined: Mon Aug 09, 2010 9:07 pm
Delivery Date: 15 Jan 2011
Leaf Number: 000257
Location: Ridgecrest, California (100 miles east of Bakersfield)

Re: My findings on the CAN bus

Thu Feb 24, 2011 7:55 am

Temp indicator would be a good one, since it is utterly worthless in its current implementation. As you observed, if it somehow gets disturbed, it likes to read ten to thirty degrees cold for several minutes. Kind of a pseudo-random number generator.

-Karl

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turbo2ltr
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Re: My findings on the CAN bus

Thu Feb 24, 2011 11:30 am

So I completely figured out the temp sensor and I see why it's so inaccurate. I don't think it's that it's inaccurate but it's so heavily dampened it's not even funny.

I found the message with the data. But the service manual says that the temp won't update until you start moving. Yeah this is no joke.

I put a switch with two fixed resistors on it so I could switch back and forth and connected it in place of the temp sensor. I could see the message changing, but the dash did not. Though when I unplugged the test setup with the car still on, the dash went to -25.

I drove around for 20 minutes and it had only gotten up to -6. Then all of a sudden, it started clicking off numbers but stopped at 22. weather.com says it's 53, feels warmer though.

I have a feeling not only is the dampening speed related (and not just "over 12mph", the faster you go the faster it updates), but it also appears to be time-since-start related.

In any case the problem is the message is transmitted in real-time, but the dash is the one dampening it. So that idea is out the door. Seems the only thing left is to make an external display...
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DarkStar
Posts: 2066
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Leaf Number: 568
Location: Hillsboro, Oregon, USA
Contact: Website

Re: My findings on the CAN bus

Thu Feb 24, 2011 12:00 pm

turbo2ltr wrote:So that idea is out the door. Seems the only thing left is to make an external display...
That will go perfect on a display with the SOC listed next to it! :D
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Reserved: 04/20/10 | Ordered: 10/01/10 | EV Project Blink Installed: 03/22/11 | Delivered: 03/25/11 | VIN: 568

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garygid
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Re: My findings on the CAN bus

Thu Feb 24, 2011 12:19 pm

If we could just "open" the Nav system's OS so that we could add many CAN-Data display screens there.

Does the "special" set of button pushes get us to screens that would be helpful?

I forgot the sequence: something like Menu, Menu, Menu, Map, Map, ... ?
See SOC/GID-Meter and CAN-Do Info
2010 Prius
2011 LEAF, 2014 Tesla S85
2018 & 2019 Tesla Model 3
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Jimmydreams
Posts: 1500
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Delivery Date: 08 Jan 2011
Leaf Number: 0175
Location: Oceanside, Ca.
Contact: Website

Re: My findings on the CAN bus

Thu Feb 24, 2011 12:23 pm

garygid wrote:If we could just "open" the Nav system's OS so that we could add many CAN-Data display screens there.

Santa, for Christmas this year, I want what Gary just said.

I promise I'll be a good boy if you can deliver.

Signed,

Jimmy
:lol:
JimmyD
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Blue SL Leaf delivered 1/7/2011
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