[Ovmsdev] OBD extended diag session
ovms at soko.cc
Tue Aug 18 18:00:43 HKT 2020
Just to make sure: I'm talking about charging the main battery, not the
12V battery. But I didn't check the status of the 12V battery. But it
would be weird to happen 2 times during a charging process exactly after
What I did is to log a complete main battery charge. Results/Details see
To your 2nd email:
Yes, the values are for the DC converter of the main battery, not the
one for the 12V battery. All values are from this ECU:
On 18.08.2020 11:54, Michael Balzer wrote:
> was the charger actually working, i.e. charge in progress? If not,
> maybe it goes asleep as soon as the 12V aux battery is topped off, and
> another ignition state change simply reactivates the topping off cycle.
> Am 16.08.20 um 16:28 schrieb Soko:
>> Hi guys,
>> Question for the CAN and ECU experts:
>> I am logging into the battery charger ECU on my eUp via the extended
>> diag session code. Otherwise I get 7F as reply.
>> I am interested in the power efficiency (pe) and power loss (pl) values.
>> It seems though as they have another timeout than the ext diag
>> session as I am polling it every 5 seconds. So ext diag is "always on".
>> But after 20 minutes during charging the values change from the
>> realistic ones to pe=100% and pl=0. To get the real values back I
>> have to unlock the car and turn the ignition. Then I can turn off and
>> lock the car again.
>> Now to the question: Is this behaviour somehow known from other
>> vehicles as well or can it be an error in my code not sending the ext
>> diag msg correctly?
>> Although when I dont send it at all I dont get even a value for pe
>> and pl, just the 7F error msg.
>> So do you think it is possible to get those values for longer than 20
>> mins without having to turn the ignition? Or am I out of luck here as
>> it seems to be some VW specific thing...
>> OvmsDev mailing list
>> OvmsDev at lists.openvehicles.com
> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
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