I have a Leaf (fully assembled and my daily driver) and I have two LBC's in my truck, each managing one Leaf pack and I have wired the two CAN buses to the dash, so it would be feasible to disconnect only the CAN bus of a Leaf parked next to the truck, bring the CAN bus to one of the LBCs (both at 2011 as is my Leaf) and see what the incorrect response tells us. BTW, there should be a trigger coming from the VCM just before the answer from the LBC, since the LBC does not know when to report its status, unless it is triggered by the power up of the IGN line to the LBC but that seems unlikely, it makes more sense that the VCM interrogates the LBC with an identity and the LBC confirms. The original trigger may come from the Combination Meter, as I was told that removing the Combination Meter will remove the Limp mode on a Leaf with the wrong battery.
Cor van de Water Chief Scientist Proxim Wireless office +1 408 383 7626 Skype: cor_van_de_water XoIP +31 87 784 1130 private: cvandewater.info http://www.proxim.com This email message (including any attachments) contains confidential and proprietary information of Proxim Wireless Corporation. If you received this message in error, please delete it and notify the sender. Any unauthorized use, disclosure, distribution, or copying of any part of this message is prohibited. -----Original Message----- From: EV [mailto:ev-boun...@lists.evdl.org] On Behalf Of Tom Parker via EV Sent: Thursday, January 26, 2017 10:54 AM To: ev@lists.evdl.org Subject: Re: [EVDL] Anyone interested in 2015 Leaf drivetrain or interior/exterior/suspension parts? On 27/01/17 07:29, Cor van de Water via EV wrote: > Also, the LBC validation happens without disconnecting the aux battery. > I know for sure as I never disconnect the 12V battery and when I swapped > my pack for a complete replacement pack from Washington State, the > yellow light on the dash came on and my Leaf was in Limp mode while I > only disconnected the (non-energized, due to the contactors in the pack) > HV lines and the control bus. > Just wheeling the original pack back under my Leaf and swapping the > connectors removed the Limp mode, so I know for a fact that the Leaf > validates the battery upon pressing the power button while the aux > battery is connected continuously, so it seems that you were looking at > the wrong thing. > Probably a trace of the EV bus as soon as the power button is depressed > (when a *lot* of communication is happening) will tell the story. > You may start the trace as soon as the brake is pressed. Thank you for this information Cor! I have many captures of my car's startup on the EV Bus and unless my hardware misses the important frames, I don't see anything special at startup. 0x603 is sent once, is the first frame sent and always with payload 00. A number of frames are sent with lots of bits set which later contain valid data - for example the first couple of frames from the LBC: 1 2017-01-26 21:47:24.907267 CAN 16 STD: 0x00000603 00 8 2017-01-26 21:47:24.993307 VCM Info 16 STD: 0x000001f2 08 64 00 00 00 01 01 06 65 2017-01-26 21:47:25.139218 LBC Battery V/A 16 STD: 0x000001db 7f e0 ff c6 00 00 00 de 66 2017-01-26 21:47:25.140191 LBC 0x1dc 16 STD: 0x000001dc ff ff ff ff 1f ff fc 6b And I can see the VCM go through it's startup sequence (in 0x1f2 byte 5). However all the frames other than 0x603 are sent more than once per second. I'll capture startup from some more cars, identify which bytes are different and use a man in the middle to selectively tamper with those bytes and see what causes the car to reject the battery. Hopefully there aren't too many differences! Carl at https://bluecars.nz/ has a leaf system on the bench, so establishing the man in the middle won't be too hard. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
