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[princec]

The EEPROM read fails are probably an issue.

Cas

[DonTom]

The EEPROM read fails are probably an issue.

Cas

Perhaps because of the "BMU ineligible" error.  But neither error  tells me why it happened.


But . . . I just now noticed it has dates for 2025.  I will now recheck the entire log looking more careful at the dates. 


-Don- Auburn, CA

[DonTom]

I took a better look at the dates and time:

3	253	6/4/2026 9:31:10 PM	764000	48	1114																				Fault set: CONTROLLER_WARNING
35	253	6/4/2026 9:31:10 PM	766000	49	1149																				controller warning 50
27	253	6/4/2026 9:31:11 PM	314000	50	1176																				MBB RTC Valid
38	253	6/4/2026 9:31:11 PM	316000	51	1214																				Fault cleared: DC_DC_LOW
47	253	6/4/2026 9:31:13 PM	736000	52	1261																				Fault cleared: CONTROLLER_WARNING
69	253	6/4/2026 9:31:22 PM	982000	53	1330																				CHARGER LSS: Freeing CHARGER node id 0x10 for charger 0
26	253	6/4/2026 9:32:22 PM	610000	54	1356																				Key Sw = OFF
64	253	6/4/2026 9:32:22 PM	704000	55	1420																				Control flags changed. Old: 0x204076 New: 0x204078
43	253	6/4/2026 9:32:22 PM	705000	56	1463																				State change from STOP to HIB
50	253	6/4/2026 9:32:22 PM	725000	57	1513																				MTC pending change by 3 from 0 to 0
75	81	6/4/2026 9:32:22 PM	726000	58	1588		0	0	0	96	114300	0	0	100	0	0	HIB	48	2960	37	34	0	0	13296640
70	253	6/4/2026 9:32:22 PM	727000	59	1658																				Disch limits: curr 897 cap 897 act 2147483647 pow 102527
63	253	6/4/2026 9:32:22 PM	728000	60	1721																				Ch limits: curr 83 cap 83 act 2147483647 pow 9486
29	84	6/4/2026 9:32:22 PM	728000	61	1751		0	-65028	0	-1
64	253	6/4/2026 9:32:22 PM	731000	62	1815																				Control flags changed. Old: 0x204078 New: 0x200070
60	253	6/4/2026 9:32:22 PM	733000	63	1875																				Disable flags changed. Old: 0x0000 New: 0x0004
106	253	6/4/2026 9:32:22 PM	739000	64	1981																				Stopping 12v charge. DC-DC 13378688uV, Battery 13296640uV, Combined 13135518uV, Ambient 30C

[/t]

[electrictwowheeler]

Maybe it's a little too late but here is a trouble shooting suggestion. The unofficial Zero manual has a description for building an adapter to read information through the OBD port. It's for Gen 2 bikes but works on Gen 3 also. I think I had to switch the TX and RX wires and use a different Baud rate but after some messing around I got it to work on a laptop. When you key on the bike you can see all the start commands as it is happening. You can see all the commands just like you see in the logs, the same when you plug into charge. Pretty useful for trouble shooting. If you type in "help", you bring up a menu of all the info you can get. It's fun even if you don't need it. There are posts about it from a long time ago. Here is an example. This is "BMS interface" screen. You can see things like charge targets, lowest cell voltage, how many amps the headlights are drawing, pack capacity.

[DonTom]

Maybe it's a little too late but here is a trouble shooting suggestion. The unofficial Zero manual has a description for building an adapter to read information through the OBD port. It's for Gen 2 bikes but works on Gen 3 also. I think I had to switch the TX and RX wires and use a different Baud rate but after some messing around I got it to work on a laptop. When you key on the bike you can see all the start commands as it is happening. You can see all the commands just like you see in the logs, the same when you plug into charge. Pretty useful for trouble shooting. If you type in "help", you bring up a menu of all the info you can get. It's fun even if you don't need it. There are posts about it from a long time ago. Here is an example. This is "BMS interface" screen. You can see things like charge targets, lowest cell voltage, how many amps the headlights are drawing, pack capacity.

Thanks, that could be handy.


But so far, I have not had a trace of the no charge problem since the time I charged it up to 110% SOC and then rode it. I put on around 200 miles on it since then and charged it up a few times. But I am curious what caused it and if it will happen again. Perhaps I should have your suggestion handy just in case it does happen again.


-Don-  Auburn, CA

[electrictwowheeler]

Good to hear it's working. Intermittent problems are the worst! Make sure your towing insurance is paid up, ha ha!

[DonTom]

Good to hear it's working. Intermittent problems are the worst! Make sure your towing insurance is paid up, ha ha!

I think it all had to do something with the bike sitting a bit too long, such as the battery getting out of balance causing the BMU to stop the charge. Perhaps right on the edge. After around 20 charge attempts, it started to charge fine. IOW, I don't think the fix was anything else that I did.


But yes, I do have a couple of ways to call for a tow truck, AAA Premier (member since 1992) and the Spot Messenger towing service (SOV).


However, I somehow do not expect to see this problem again, but if I do, I will just keep on trying to charge unit it works--and then I will look into replacing the BMU.


-Don-   Auburn, CA