[Caevlist] Dead Leaf

[Ed Sinclair]

You are likely correct about the key needing to be on to get stored codes,
but not to send power to the OBD port.  I have a couple bluetooth versions
with various LEDs and they definitely fire up as soon as you plug them in
regardless of key position.  Its probably the ECU on the vehicle that
requires the key to be on in order to retrieve codes, etc.

That said, it's a tiny current draw.  I've had one plugged into a 4runner
for several years 24x7.  When I first plugged it in I did have it seemingly
drain a battery.  However it was just the straw that broke the camel's
back, the battery tested bad anyway.  After battery replacement I've never
had an issue.






On Tue, Mar 19, 2019 at 12:33 PM Paul Wallace <ianaudio at peak.org> wrote:

> Seems odd to me that the OBD II interface plug would remain powered with
> the vehicle turned off.  As I remember, the last time I took a car in to
> have codes read out, the ignition had to be in the 'on' state to get the
> VCU to communicate.  I know I have my truck wired this way, just so that
> the dongle doesn't kill the 12v battery.
>
> Paul
>
> ------------------------------
> *From: *"Bruce Hecht" <brucehe at peak.org>
> *To: *"Alan Batie" <alan at batie.org>, caevlist at caevclub.org
> *Sent: *Tuesday, March 19, 2019 12:24:39 PM
> *Subject: *Re: [Caevlist] Dead Leaf
>
> I also had an OBD interface device drain a weak 12V battery.
>
> Bruce
>
> -----Original Message-----
> From: caevlist-bounces at rdrop.com [mailto:caevlist-bounces at rdrop.com] On
> Behalf Of Alan Batie
> Sent: Tuesday, March 19, 2019 11:53 AM
> To: caevlist at caevclub.org
> Subject: [Caevlist] Dead Leaf
>
> So, I went out to my Leaf to head into work this morning...and it was
> unresponsive - the 12V battery was dead.  I can't think of anything that
> would have drained it, so I put a charger on it and will take it into the
> shop and have them check it out...
>
>
>
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