Driver8
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Leave OBDII plugged in all the time for Leafspy?

Tue Oct 13, 2020 5:46 am

Does everyone just leave their OBDII reader plugged in at all times if they are running Leafspy? Or should I be removing it and re-inserting it just when i want to use Leafspy?

Thanks for any answers.

LeftieBiker
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Re: Leave OBDII plugged in all the time for Leafspy?

Tue Oct 13, 2020 6:11 am

If you want to leave it plugged in, find a unit that turns off with the car, or at least goes into a very low current mode. Otherwise you risk draining the 12 volt battery.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

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jlv
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Re: Leave OBDII plugged in all the time for Leafspy?

Tue Oct 13, 2020 6:45 am

I left the bluetooth ODB-II dongle plugged into my 2013 SL for nearly 4 years without any issues with the 12V battery. I did not have an unit that turned off with the car or anything. I'll note that the SL comes with the little solar panel trickle charger for the 12V; although almost always my car was parked in a garage (at work and home). The only time I unplugged it was the two periods where the car sat unused for 2 weeks (I was out of the country), and I only unplugged it then because of concerns I got from this forum.

If you do decide to unplug the ODB-II dongle, do yourself a favor and get an ODB-II extension cord. Leave that plugged in and just unplug the dongle from that. This way you don't wear out the ODB-II port. I bought a Y extension, thinking that would let service or my state inspection plug into the free connection, but both always just unplugged the Y.
LEAF '13 SL+Prem (mfg 12/13, leased 4/14, bought 5/17, sold 11/18, 34K mi, AHr 58, SOH 87%)
Tesla S 75D (3/17, 45K mi)
Tesla X 100D (12/18, 23K mi)
ICE free since '18
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GerryAZ
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Re: Leave OBDII plugged in all the time for Leafspy?

Thu Nov 19, 2020 11:00 pm

I only unplug the Bluetooth OBDII adapter when parking the car for extended time. As long as I am driving at least every couple of days, I leave it plugged in to minimize wear on the connector. The 2011 drained its 12V battery when I inadvertently left the adapter plugged in while out of town for 5 or 6 days. I inadvertently left the adapter plugged in to the 2015 during a short out of town trip (less than a week) and there was no issue. I suspect the 2019 would handle leaving the adapter plugged in, but I try to remember to unplug it during out of town trips anyway.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019

LeftieBiker
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Re: Leave OBDII plugged in all the time for Leafspy?

Thu Nov 19, 2020 11:13 pm

I suspect the 2019 would handle leaving the adapter plugged in, but I try to remember to unplug it during out of town trips anyway.

Given the rest voltages I'm seeing on our Gen 2 Leafs, I wouldn't count on that.
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
BAFX OBDII Dongle
PLEASE don't PM me with Leaf questions. Just post in the topic that seems most appropriate.

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Nubo
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Re: Leave OBDII plugged in all the time for Leafspy?

Fri Nov 20, 2020 12:48 pm

I don't need LeafSpy info for normal driving and only use it occasionally to check cell levels or error codes. So I unplug the dongle the rest of the time. I figure the handful of insertions per year is within reason for the port and I want to minimize the chance of having something act up on the CAN bus.
I noticed you're still working with polymers.

GerryAZ
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Re: Leave OBDII plugged in all the time for Leafspy?

Fri Nov 20, 2020 6:09 pm

LeftieBiker wrote:
Thu Nov 19, 2020 11:13 pm
I suspect the 2019 would handle leaving the adapter plugged in, but I try to remember to unplug it during out of town trips anyway.

Given the rest voltages I'm seeing on our Gen 2 Leafs, I wouldn't count on that.
My car was last charged two nights ago and just driven a few short trips since then. It has been sitting for about 5 hours since the last 3-mile short trip (with OBDII adapter plugged in) and the OEM 12V battery is reading 12.576 so I am not worried about the charging algorithm or battery condition. I understand Nubo's concern about CAN Bus interference, but I like to let Leaf Spy log data while I drive and I like the audible tire pressure warning that I can set for the pressures I run (48 psi cold and alarm set for 42 psi with the run flat tires I have now). The car's built-in pressure alarm does not activate until pressure gets really low.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015; traded 8/10/2019 at 82,436 miles
White LEAF 2019 SL Plus purchased 8/10/2019

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Nubo
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Re: Leave OBDII plugged in all the time for Leafspy?

Fri Nov 20, 2020 8:53 pm

GerryAZ wrote:
Fri Nov 20, 2020 6:09 pm
LeftieBiker wrote:
Thu Nov 19, 2020 11:13 pm
I suspect the 2019 would handle leaving the adapter plugged in, but I try to remember to unplug it during out of town trips anyway.

Given the rest voltages I'm seeing on our Gen 2 Leafs, I wouldn't count on that.
My car was last charged two nights ago and just driven a few short trips since then. It has been sitting for about 5 hours since the last 3-mile short trip (with OBDII adapter plugged in) and the OEM 12V battery is reading 12.576 so I am not worried about the charging algorithm or battery condition. I understand Nubo's concern about CAN Bus interference, but I like to let Leaf Spy log data while I drive and I like the audible tire pressure warning that I can set for the pressures I run (48 psi cold and alarm set for 42 psi with the run flat tires I have now). The car's built-in pressure alarm does not activate until pressure gets really low.
Perfectly reasonable. If I used it more, I'd get a dongle with an on/off switch, or a port extension cable with same.
I noticed you're still working with polymers.

Driver8
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Re: Leave OBDII plugged in all the time for Leafspy?

Sat Nov 21, 2020 4:59 pm

UPDATE. I have left my OBDII plugged in basically since we got the car (2017 S) about two months ago and we have not noticed any 12V battery issues. I don't use LeafSpy nearly as much as I thought I might, so I will probably just unplug it at this point (my wife is VERY not interested in the data, and she's been the majority of trips on the car).

SueC56
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Re: Leave OBDII plugged in all the time for Leafspy?

Sat Nov 21, 2020 6:27 pm

Also, it probably matters if you have LeafSpy open on your phone or have it closed. I would think the car would draw more power if it were constantly feeding LeafSpy.

Right or not?

Sue C
Sue C
2016 Nissan LEAF SL, Coulee Red
Purchased 8/3/2019 with 9500 miles
As of 7/22/2020 it has 12k miles

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