[Ovmsdev] Activating a sleeping Gen 1 Leaf

Collin Kidder collink at kkmfg.com
Wed Mar 16 03:46:38 HKT 2016

The proper message is 0x68C. Here is a capture of the car sitting
idle, then getting a climate control request over carwings. Then, the
carwings system wakes up the car and begins heating. Timestamp is in
microseconds. So, there is only a 50ms gap from the time the wakeup
message is sent to the time that other devices begin blasting a ton of
messages onto the bus. Before the wake up message there are no
messages on the bus at all. It's dead quiet.


The URL also answers the question of what am I using for capture
analysis. I wrote my own program in QT for that purpose.

I've been using the same spreadsheet on google. I think it's
reasonably accurate usually but doesn't really cover every message.

On Tue, Mar 15, 2016 at 2:59 PM, Tom Parker <tom at carrott.org> wrote:
> Can you share a capture of a Carwings wakeup on a Gen2?
> https://docs.google.com/spreadsheets/d/1EHa4R85BttuY4JZ-EnssH4YZddpsDVu6rUFm0P7ouwg/edit?pref=2&pli=1#gid=0
> says you send message 68c and
> http://www.mynissanleaf.com/viewtopic.php?p=438109#p438109 says you send
> message 68. I'm guessing the former is correct. Neither say what the gap
> between the messages should be.
> What do people use to analyze can bus captures? I've started writing a
> wireshark dissector for the leaf ev can bus which is making the messages
> easier to understand and hence the OVMS code easier to write. Of course I
> had to learn lua to do that, but hopefully it will help others too. I'll
> push it to a repo shortly.
> Do you happen to know if there is there a better reference for what the
> messages mean than
> https://docs.google.com/spreadsheets/d/1EHa4R85BttuY4JZ-EnssH4YZddpsDVu6rUFm0P7ouwg/edit?pref=2&pli=1#gid=0
> ? I've looked at various forum threads but the information is spread very
> thinly through the discussion. Other project's firmware is a little more
> information dense but harder to extract.
> On 03/13/2016 02:16 AM, Collin Kidder wrote:
>> The Gen2 does wake up based on a CAN message. I have captures that
>> show that message being the very first thing over the wire and then
>> the car wakes up and a ton of messages begin to flow. But, I haven't
>> tried directly injecting that message to see if I can wake the car up
>> via the message. It is, however, supposed to work that way. I'll give
>> it a try when I get a chance.
>> I actually have both a 2012 and 2013 Leaf so I can do tests for
>> differences. I'll get a capture from both and compare to see if there
>> is a good way to distinguish the two over CAN. The CAN data decoded on
>> mynissanleaf shows things that only exist in one or the other so it
>> should be very possible to figure out which one you're in.
>> On Wed, Mar 9, 2016 at 4:35 AM, Tom Parker <tom at carrott.org> wrote:
>>> Quick update,
>>> I contorted myself into the driver's foot well of my right hand drive
>>> Japanese domestic manufacture 2012 gen 1 Leaf and unplugged the TCU. I
>>> can
>>> confirm that connecting pin 1 (battery +ve) to pin 11 (EV System
>>> Activation
>>> Request) causes a beep from the front of the car and a few relay clicks.
>>> I
>>> didn't try to activate climate control to confirm that it works, I'll try
>>> that later this week and if it does, hook it up to the OVMS. Splice into
>>> the
>>> loom in the cramped conditions under the dashboard won't be fun. I
>>> wouldn't
>>> be totally surprised if the TCU does the charge timer wakeup, so
>>> preserving
>>> the existing circuit is a good idea.
>>> http://www.mynissanleaf.com/viewtopic.php?p=438109#p438109 says the Gen 2
>>> Leaf doesn't need this circuit, and the same source describes CAN message
>>> to
>>> do the wakeup. If anyone wants to test that I can add that message to see
>>> if
>>> it works.
>>> Has anyone seen a message on the EV CAN Bus that would distinguish a Gen
>>> 1
>>> from a Gen 2?
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