[Ovmsdev] Another incident

[Michael Geddes]

Nope, I wasn't.  Thanks.  I'll get onto the work-around config.

I'm now subscribed to that thread.

//.ichael

On Sat, 22 Mar 2025 at 16:44, Michael Balzer via OvmsDev <
ovmsdev at lists.openvehicles.com> wrote:

> Michael,
>
> are you aware of these new findings by Richard Taylor?
>
>
> https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/issues/980#issuecomment-2715403436
>
> Regards,
> Michael
>
>
> Am 22.03.25 um 03:26 schrieb Michael Geddes via OvmsDev:
>
> How are we going with this investigation?
>
> I've been following along mostly and have been periodically going over the
> poller code trying to work out if there are any points where there could be
> timing issues with long-held mutexes (or even deadlocks).  I did push up
> some small tweaks recently but there was no aha! moment.
>
> I have been working on some changes that would move forward on the idea of
> building a vehicle implementation from duktape scripts... and I had been
> getting some points where ovms went berserk, kicked out the ssh session and
> stopped responding on ssh http but then eventually came back (without a
> reset) after some minutes. The script was simply adding a new
> PollSeriesEntry which then uses the dbc decoder (with improvements) to
> decode to metrics, noting that the script is setup only and that there are
> no call-backs into the duktape engine/task.
>
> Anyway, those patches mentioned above seem to have resolved that issue
> with the hangups which is why I made the p/r.
>
> BTW I have been running my Ioniq5 with the latest of the timing patches
> for a while now.
>
> Because of the correlation of the bus issues with the poller changes, I am
> still concerned that the poller changes are contributing to the problem
> (even if not directly causing it), so would be happy to chase down any
> leads people might have.
>
> //.ichael
>
> On Sat, 22 Feb 2025 at 02:52, Chris Box via OvmsDev <
> ovmsdev at lists.openvehicles.com> wrote:
>
>> Check your DTCs with leafspy, if it shows a bunch of DTCs including a
>> B2604 BCM Shift PN diag, then likely low 12v, try a 24 hr charge or replace
>> it.
>>
>>
>>
>>
>> I did indeed have B2604-00, along with nineteen others. Most of these
>> mention CAN errors, and it seems plausible that low 12v could be a common
>> cause.
>>
>> Do you think this rules out a poor OVMS OBDII connection? I'm thinking if
>> I have high resistance in that connector, then OVMS will experience low
>> voltage but the rest of the car modules will have good voltage.
>>
>> However I see codes that suggest communication errors between Nissan
>> modules:
>> C118C-01 ABS Brake: Malfunction is detected in VCM system. Control module
>> communication issue.
>> B2064-00 BCM Shift PN Diag CAN: Park-Neutral position switch signal
>> discrepancy
>> C1A70-01 BRAKE: Malfunction is detected in ABS actuator control unit
>> system
>> U1266-02 MULTI AV: Malfunction is detected between the AV control unit
>> and TCU
>> U0428-00 AVM: Invalid data received from steering angle sensor module
>>
>> So I'm thinking perhaps the whole car briefly had low voltage.
>>
>> To try to fix this, I cleaned the 12v battery terminals and performed a
>> long charge. After clearing the codes, I have only two codes that reappear.
>>
>> P317E-00 EV/HEV HV Battery System EVC-249 (perhaps caused by #1061
>> <https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/issues/1061>
>> )
>> U1A06-15 TCU Communication incorrect calibration (probably because I've
>> removed its antenna)
>>
>> Chris
>> _______________________________________________
>> OvmsDev mailing list
>> OvmsDev at lists.openvehicles.com
>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>
>
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> --
> Michael Balzer * Am Rahmen 5 * D-58313 Herdecke
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