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[2020_SRS_Commuter]

Here's the second event. Now I'm wondering if the DC to DC is suspect. Just now looked at this. If the BMS isn't getting the power it needs, perhaps the MBB isn't getting the permission it needs to use the battery pack.
Recently in another thread I added a separate 12v battery to run my accessories because it could no longer manage to power them reliably.
Now I'm thinking maybe the Sevcon converter should be swapped. This event happened right near the end of my highway run, then at the stoplight the ineligible fault occurred and I had to push it out of the road onto the sidewalk

 01947     12/21/2024 00:04:21   82ûFault set: BMS_RESERVE_VOLTAGE   
 01948     12/21/2024 00:04:41   0x51 0x50 0x22 0x06 0x00 0x9e 0xfb 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xdc 0x7c 0x01 0x00 0xd0 0x7e 0x01 0x00 0x11 0x15 0x00 0x00 0x27 0xfd 0x7c 0x01 0x00 0x0d 0xef 0x00 0x00 0x52 0x55 0x4e 0x00 0x00 0x00 0x00 0x00 0x00 0x8b 0x05 0x00 0x00 0x46 0x00 0x00 0x00 0x1d 0x00 0x00 0x00 0x38 0x00 0x00 0x00 0x27 0x00 0x00 0x00 0x08 0x77 0xc8 0x00 0xb2 0x3e 0xfd    
 01949     12/21/2024 00:04:41   8&?ûDisch limits: curr 845 cap 845 act 845 pow 82387   
 01950     12/21/2024 00:04:41   8& ûCh limits: curr 0 cap 0 act 2147483647 pow 94   
 01951     12/21/2024 00:04:41   0x54 0x38 0x26 0x06 0x00 0xa1 0xfb 0xc0 0x4b 0xfd 0x00 0x53 0x00 0x00 0x00 0x19 0x01 0x00 0x00 0xd3 0x41 0x01 0x00 0xb2 0x30 0xfd    
 01952     12/21/2024 00:05:02   î¢ûFault cleared: BMS_RESERVE_VOLTAGE   
 01953     12/21/2024 00:05:41   hB£ûFault set: BMS_RESERVE_VOLTAGE   
 01954     12/21/2024 00:05:41   0x52 0x90 0x47 0x05 0x00 0xa4 0xfb 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x68 0x6e 0x01 0x00 0xe8 0x9a 0x04 0x00 0xe3 0x16 0x00 0x00 0x24 0xc0 0x6e 0x01 0x00 0x2d 0x1b 0x04 0x00 0x52 0x55 0x4e 0x00 0x00 0x00 0x00 0x00 0x00 0x48 0x05 0x00 0x00 0x44 0x00 0x00 0x00 0x1c 0x00 0x00 0x00 0x38 0x00 0x00 0x00 0x28 0x00 0x00 0x00 0xf8 0x4e 0xc8 0x00 0x01 0x01 0x71 0xa7 0x0e 0x00 0x68 0xa1 0xcf 0x08 0x18 0x08 0x00 0xb2 0x30 0xfd    
 01955     12/21/2024 00:05:48   :¥ûFault cleared: BMS_RESERVE_VOLTAGE   
 01956     12/21/2024 00:05:57   °è¦ûFault set: BMS_RESERVE_VOLTAGE   
 01957     12/21/2024 00:06:02    Í
§ûHigh beam activated   
 01958     12/21/2024 00:06:24   0i¨ûHigh beam deactivated   
 01959     12/21/2024 00:06:41   0x51 0x68 0x1e 0x06 0x00 0xa9 0xfb 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xd0 0x7e 0x01 0x00 0xf8 0x11 0x00 0x00 0xe0 0x15 0x00 0x00 0x1e 0x65 0x7e 0x01 0x00 0xc1 0x7b 0xff 0xff 0x52 0x55 0x4e 0x00 0x00 0x00 0x00 0x00 0x00 0x0e 0x05 0x00 0x00 0x49 0x00 0x00 0x00 0x1d 0x00 0x00 0x00 0x3a 0x00 0x00 0x00 0x2a 0x00 0x00 0x00 0x08 0x77 0xc8 0x00 0xb2 0x45 0xfd    
 01960     12/21/2024 00:06:41   P"ªûDisch limits: curr 460 cap 460 act 2147483647 pow 45080   
 01961     12/21/2024 00:06:41   P"«ûCh limits: curr 0 cap 0 act 0 pow 94   
 01962     12/21/2024 00:06:41   0x54 0x50 0x22 0x06 0x00 0xac 0xfb 0x00 0x00 0x00 0x00 0xe8 0xfe 0xff 0xff 0x47 0x01 0x00 0x00 0x18 0xb0 0x00 0x00 0xb2 0x30 0xfd    
 01963     12/21/2024 00:06:49   XJ
ûFault cleared: BMS_RESERVE_VOLTAGE   
 01964     12/21/2024 00:06:52   ?¥®ûMTC pending change by 1 from 1 to 0
   
 01965     12/21/2024 00:06:52   h¯ûChanging riding mode to 4, Ride
   
 01966     12/21/2024 00:07:04   ð
°ûControl flags changed. Old: 0x4046 New: 0x4066   
 01967     12/21/2024 00:07:17   ?>±ûMod 2 needs disconnect   
 01968     12/21/2024 00:07:17   8J²ûDisable flags changed. Old: 0x0000 New: 0x0008   
 01969     12/21/2024 00:07:17    N³ûChanging state because module request disconnect   
 01970     12/21/2024 00:07:17   ðU´ûState change from RUN to STOP   
 01971     12/21/2024 00:07:17   0x51 0x48 0x71 0x00 0x00 0xb5 0xfb 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x74 0x85 0x01 0x00 0x7c 0x15 0x00 0x00 0x00 0x00 0x00 0x00 0x1e 0x40 0x85 0x01 0x00 0x82 0xab 0xff 0xff 0x53 0x54 0x4f 0x50 0x00 0x00 0x00 0x00 0x00 0x17 0x05 0x00 0x00 0x45 0x00 0x00 0x00 0x1c 0x00 0x00 0x00 0x39 0x00 0x00 0x00 0x2a 0x00 0x00 0x00 0xf0 0x3a 0xc8 0x00 0xb2 0x45 0xfd    
 01972     12/21/2024 00:07:17   0u¶ûDisch limits: curr 411 cap 411 act 2147483647 pow 40976   
 01973     12/21/2024 00:07:17   y·ûCh limits: curr 0 cap 0 act 0 pow 94   
 01974     12/21/2024 00:07:17   0x54 0x18 0x79 0x00 0x00 0xb8 0xfb 0x00 0x00 0x00 0x00 0xd8 0xfd 0xff 0xff 0x47 0x01 0x00 0x00 0x10 0xa0 0x00 0x00 0xb2 0x41 0xfd    
 01975     12/21/2024 00:07:17   è?¹ûFault pending: MODULE_INELIGIBLE sets in 30 seconds   
 01976     12/21/2024 00:07:17   Ð?ºûFault set: MODULE_DISABLED   
 01977     12/21/2024 00:07:17   ¸?»ûFault set: BMS_CHARGE   
 01978     12/21/2024 00:07:17   ?¼ûFault set: BMS_STATE   
 01979     12/21/2024 00:07:18   pp½ûDisable flags changed. Old: 0x0008 New: 0x000c   
 01980     12/21/2024 00:07:18   Xt¾ûMod_num:(elig, discharge_elig, charge_elig)   
 01981     12/21/2024 00:07:18   @x¿û; 2(0x200, 0x08, 0x14)   
 01982     12/21/2024 00:07:18   (|ÀûState change from STOP to WAIT   
 01983     12/21/2024 00:07:18   h?ÁûEnabled bms 2 clear faults flag   
 01984     12/21/2024 00:07:18   0x51 0x50 0x9f 0x06 0x00 0xc2 0xfb 0x00 0x00 0x00 0x00 0x60 0x00 0x00 0x00 0xe4 0x51 0x01 0x00 0xd4 0xfe 0xff 0xff 0x00 0x00 0x00 0x00 0x1e 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x57 0x41 0x49 0x54 0x00 0x00 0x00 0x00 0x00 0x17 0x05 0x00 0x00 0x44 0x00 0x00 0x00 0x1c 0x00 0x00 0x00 0x39 0x00 0x00 0x00 0x2a 0x00 0x00 0x00 0xf8 0x4e 0xc8 0x00 0xb2 0x45 0xfd    
 01985     12/21/2024 00:07:18   8£ÃûDisch limits: curr 411 cap 411 act 2147483647 pow 36825   
 01986     12/21/2024 00:07:18   8£ÄûCh limits: curr 0 cap 0 act 0 pow 94   
 01987     12/21/2024 00:07:18   0x54 0x38 0xa3 0x06 0x00 0xc5 0xfb 0x00 0x00 0x00 0x00 0xd8 0xfd 0xff 0xff 0x47 0x01 0x00 0x00 0x00 0x00 0x00 0x00 0xb2 0x26 0xfd    
 01988     12/21/2024 00:07:38   àÔÆûFault set: HIGH_THROTTLE   
 01989     12/21/2024 00:07:39   (óÇûFault set & cleared since last time faults logged: HIGH_THROTTLE   
 01990     12/21/2024 00:07:40   p
ÈûFault set: HIGH_THROTTLE   
 01991     12/21/2024 00:07:40    ¿ÉûFault cleared: HIGH_THROTTLE   
 01992     12/21/2024 00:07:41   póÊûFault set: HIGH_THROTTLE   
 01993     12/21/2024 00:07:41    ¡ËûFault set: HIGH_THROTTLE   
 01994     12/21/2024 00:07:41   àWÌûFault cleared: HIGH_THROTTLE   
 01995     12/21/2024 00:07:47   _
ÍûFault set: MODULE_INELIGIBLE   
 01996     12/21/2024 00:07:50   `êÎûControl flags changed. Old: 0x4066 New: 0x4046   
 01997     12/21/2024 00:07:54   XÍÏûControl flags changed. Old: 0x4046 New: 0x4066   
 01998     12/21/2024 00:07:57   ð=ÐûKey Sw = OFF   
 01999     12/21/2024 00:07:57    ÑûControl flags changed. Old: 0x4066 New: 0x4068   
 02000     12/21/2024 00:07:57   ±ÒûState change from WAIT to HIB   
 02001     12/21/2024 00:07:57   (ÿÓûMTC pending change by 3 from 0 to 0
   
 02002     12/21/2024 00:07:57   0x51 0x10 0x03 0x06 0x00 0xd4 0xfb 0x00 0x00 0x00 0x00 0x60 0x00 0x00 0x00 0x90 0x33 0x00 0x00 0x38 0xff 0xff 0xff 0x00 0x00 0x00 0x00 0x1e 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x48 0x49 0x42 0x00 0x00 0x30 0x00 0x00 0x00 0x20 0x05 0x00 0x00 0x40 0x00 0x00 0x00 0x1c 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xb0 0x17 0xc0 0x00 0xb2 0x45 0xfd    
 02003     12/21/2024 00:07:57   øÕûDisch limits: curr 411 cap 411 act 2147483647 pow 36825   
 02004     12/21/2024 00:07:57   à
ÖûCh limits: curr 0 cap 0 act 0 pow 94   
 02005     12/21/2024 00:07:57   0x54 0xe0 0x0a 0x06 0x00 0xd7 0xfb 0x00 0x00 0x00 0x00 0xe0 0xfc 0xff 0xff 0x00 0x00 0x00 0x00 0xff 0xff 0xff 0xff 0xb2 0x2e 0xfd    
 02006     12/21/2024 00:07:57   ?ØûFault cleared: MODULE_INELIGIBLE   
 02007     12/21/2024 00:07:57   ?ÙûFault cleared: MODULE_DISABLED   
 02008     12/21/2024 00:07:57   P"ÚûFault cleared: BMS_CHARGE   
 02009     12/21/2024 00:07:57   8&ÛûFault cleared: BMS_STATE   
 02010     12/21/2024 00:07:57   .ÜûControl flags changed. Old: 0x4068 New: 0x0060   
 02011     12/21/2024 00:07:57   AÝûStopping 12v charge.  DC-DC 12588976uV, Battery 12594104uV, Combined 12538449uV, Ambient 13C   
 02012     12/21/2024 00:07:57   8 ÞûKill Sw = STOP   
 02013     12/21/2024 00:07:57   (ßûDisable flags changed. Old: 0x000c New: 0x000d   
 02014     12/21/2024 00:07:59   @
àûKey Sw = ON

[TheRan]

Does the BMS get power from the DC-DC? I would have assumed it's powered straight from the battery, either tapping into however many cells it needs for the appropriate voltage (so probably 3 for 12V) or has a way of stepping down the voltage of the full pack.

[2020_SRS_Commuter]

I dont know. It would be an interesting thing to try to key up the bike then remove the 12v battery cable. Does it turn off, or error?
Doesnt directly answer your question, just something I wonder about.
All I know of BMS conns is what I can see in the prints derived by AtomicDog shared via Github
Im not a Zero scientist but if I was building it, for safety I would not want to rely on the thing monitoring the power pack to get its power from the power pack its monitoring. Id rather it have an independent source of power, like the PDU, and if the PDU is lost the system shuts down, and if whatever serves as a BMS watchdog signal to the MBB is lost, the contactor opens.

[2020_SRS_Commuter]

My BMS logs obtained through ZNG will never parse using the HTML tool. IDK why. Only the MBB ones work.
I made one of those cables to use Terraterm with the OBD2 port.
Ill try that tonight with the laptop I have here.. look at what can be reported about the BMS. Gotta drop this for now, other stuff to do today.

EDIT: You may well be right about the power for BMS, I just realized the extra battery I added to my Zero to power my accessories works exactly like that. Has its own little BMS built right in, which contributes to self discharge. 

[2020_SRS_Commuter]

Didnt get to the laptop yet but last night I keyed on the bike, then disconnected the 12v battery ground terminal. Immediately the battery light came on on the display. The bike stayed powered up.
I put up the kickstand and tried gently turning the throttle but it was not armed. A banner appeared saying 12v battery low, or 12v low, or some such.
Put the stand down, cleared that error, and when I went to put  the stand up again I got another error banner, "traction control fault". I put the stand down, and cleared that.
( 12v low is Fault Code 25, traction control fault is Fault Code 13 )
I put the stand up up again, move the throttle a bit and its armed!!!
So IDK what if anything that has to do with finding my problem... but by experimentation now we know its possible to ride on with a failed battery, and even to be able to " jump start" the SRS/SRF with a dead or missing 12v battery and ride it around. This could be a Plan B for someone dealing with a low 12v battery in the cold or something. You just need some tools to disconnect the negative terminal and another sufficient source of 12v to get it going. Maybe you could even connect a Lipo charger and leave the battery connected, and THAT would be enough to get it going.

[Specter]

That 12 volts controls the BMS and stuff too correct?
be VERY careful, you are playing with fire if you do indeed have a voltage problem.

Aaron

[2020_SRS_Commuter]

That 12 volts controls the BMS and stuff too correct?
Aaron

I don't know. It doesn't come from the 12v battery.

[2020_SRS_Commuter]

Just to close this out, Don seems to be right.
After those two "ineligible" events, never saw it again.
Also turns out my battery still has more capacity than I thought... I forgot about the effects of cold weather.
Thanks for all the input