KTuner Current Drain?

KensBlueGenX

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Does anybody know what the standby current drain of the KTuner v1.2 OBD interface unit when the car is turned off?

I'm trying to track down an abnormally large (730ma) parasitic battery drain when my 2020 1.5T MT HB Sport is completely off. I doubt it is the KTuner interface, however am interested in what the actual spec is supposed to be.
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Doc_Mello

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Zero, I believe. How do you know the drain is that large? If you think it’s the Ktuner, unplug it, then measure the voltage again.
 

dt10g

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Just throwing this product out there in case it helps your troubleshooting toolbox

https://antigravitybatteries.com/products/accessories/battery/chargers/bluetooth-tracker-lead-acid/

Also not sure if something in this camp could help

https://autofocuser.com/products/body-harness-v1?variant=37541880889516
https://comma.ai/shop/panda

A bit out there but... this guy seems to be a legend coder if that is your thing

https://github.com/csouers
https://github.com/csouers/bodyharness#compatibility
https://gist.github.com/csouers
https://github.com/commaai/opendbc
https://github.com/hackoregon/civic

Also, I tried something for you on the electrical front but it seems inconclusive:
I have a few things... and I figured the boards and CPU might be close enough, and with the ports it allowed me to try these connections:


1x KTuner v2.0 (new version with Firewire)
1x Seasonic PowerAngel (sits between a device and wall socket and measures data)

First I plugged in just the Power Angel to the power socket, nothing on the output side
(*for convenience sake, the PA was plugged into a powerbar with some other devices... )

V = 117.4
A = 0.00
W = 0
VA = ? forgot to check...
Hz = 59.9
PF = goes between 0.00 and 1.00

Then I plugged in a 60W rated Anker USB-C power block (with nothing on it)

V = 117.4
A = 0.01 *
W = 0
VA = ? forgot to check...
Hz = 59.9
PF = ? argh

Then I plugged in my KTuner via USB to the Anker charger above.
The KTuner (display) comes alive for a bit, before knocking off to sleep (?)

IIRC, with screen on

V = 117.6
A = 0.03*
W = 1*
VA = 3*
Hz = 59.9
PF = 0.5*


it might have dropped to A 0.01 with the screen off sorry I am not very scientific...

Then I mixed things up entirely... starting fresh:

first I plugged in the Ktuner via Firewire into an old Firewire-based iPod charger that was plugged into the PowerAngel (measured)
then I additionally plugged in the USB port to my computer at the same time (measured)
I tapped the screen, and I uploaded a tune to the KTuner (measured)

I never seem to deviate from those earlier values...

which seems surprising I thought I would see the Amps and Watts jump around a bit.
but I guess it must be a lower power device and when it's hooked up to Ktuner, it's just a USB-Serial adapter writing bits to some memory (or storage?) inside.

I will verify my PowerAngel is working properly with some high demand devices when KTuner finally finishes this damn upload.
 

dt10g

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Also, could you use an OBD2 splitter and then use a multi-meter on the appropriate power pin of the other end? e.g. P3 Gauges make such a splitter
 


OP
OP

KensBlueGenX

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Just throwing this product out there in case it helps your troubleshooting toolbox

https://antigravitybatteries.com/products/accessories/battery/chargers/bluetooth-tracker-lead-acid/

Also not sure if something in this camp could help

https://autofocuser.com/products/body-harness-v1?variant=37541880889516
https://comma.ai/shop/panda

A bit out there but... this guy seems to be a legend coder if that is your thing

https://github.com/csouers
https://github.com/csouers/bodyharness#compatibility
https://gist.github.com/csouers
https://github.com/commaai/opendbc
https://github.com/hackoregon/civic

Also, I tried something for you on the electrical front but it seems inconclusive:
I have a few things... and I figured the boards and CPU might be close enough, and with the ports it allowed me to try these connections:


1x KTuner v2.0 (new version with Firewire)
1x Seasonic PowerAngel (sits between a device and wall socket and measures data)

First I plugged in just the Power Angel to the power socket, nothing on the output side
(*for convenience sake, the PA was plugged into a powerbar with some other devices... )

V = 117.4
A = 0.00
W = 0
VA = ? forgot to check...
Hz = 59.9
PF = goes between 0.00 and 1.00

Then I plugged in a 60W rated Anker USB-C power block (with nothing on it)

V = 117.4
A = 0.01 *
W = 0
VA = ? forgot to check...
Hz = 59.9
PF = ? argh

Then I plugged in my KTuner via USB to the Anker charger above.
The KTuner (display) comes alive for a bit, before knocking off to sleep (?)

IIRC, with screen on

V = 117.6
A = 0.03*
W = 1*
VA = 3*
Hz = 59.9
PF = 0.5*


it might have dropped to A 0.01 with the screen off sorry I am not very scientific...

Then I mixed things up entirely... starting fresh:

first I plugged in the Ktuner via Firewire into an old Firewire-based iPod charger that was plugged into the PowerAngel (measured)
then I additionally plugged in the USB port to my computer at the same time (measured)
I tapped the screen, and I uploaded a tune to the KTuner (measured)

I never seem to deviate from those earlier values...

which seems surprising I thought I would see the Amps and Watts jump around a bit.
but I guess it must be a lower power device and when it's hooked up to Ktuner, it's just a USB-Serial adapter writing bits to some memory (or storage?) inside.

I will verify my PowerAngel is working properly with some high demand devices when KTuner finally finishes this damn upload.
Good info, thanks!
 

KTuner

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In sleep mode 15-20mA average is typical. It may show more when it wakes up to check for the ECU. It may show less when it's in the deep sleep.
 


 


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