Toyota Rav4 EV Forum

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 Post subject: Re: 30k mile service mileage bump
PostPosted: Mon Feb 06, 2017 8:35 pm 
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Joined: Thu Dec 27, 2012 10:55 pm
Posts: 605
714autonut wrote:
I am a new owner of a 2014 Rav 4 EV that just came off of lease from So. Coast Toyota. Still have the 120vac charge cord waiting for the new Leviton's to come off production. My first charges at 120vac gave 80 miles on regular and 100 miles on extended. Immediately following my 30k service checks those ranges went significantly up to 100 and 115 miles respectively still at 120vac. Does anyone know if there has been a software update recently of if I may be cooking my batteries since the service visit? I am also wondering if I really should always shoot for charging at the highest 40A rate or give the batteries a slower charge once in a while to prolong their useful life? Any ideas on this would be greatly appreciated.


Charging with 40 amps is nowhere near any limit that would hurt the batteries.
Not even the JDemo Chademo charging ut to 45 kW (over 4 times as much) comes close as long as the batteries are temperature wise managed (which they are )

I found this article about the efficiency of the built-in charger of a 2015 nissan leaf:
link to pdf:
https://avt.inl.gov/pdf/fsev/SteadyStateLoadCharacterization2015Leaf.pdf

That basically shows the onboard charger of the Nissan Leaf is most efficient with the highest possible charging rate.
Would be interesting to know if the same is the case for any Tesla charger

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2 x GEM EV
past ev's: 3 yr leaf 30k, 3yr rav4ev 34k, 3yr rav4ev 25k


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 Post subject: Re: 30k mile service mileage bump
PostPosted: Mon Feb 06, 2017 9:32 pm 
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Joined: Wed Nov 14, 2012 9:50 pm
Posts: 3952
Location: San Diego
The dealer likely disconnected the 12 V battery at some point, which caused the increase readout on your GOM.

There is en entire thread on the GOM:

viewtopic.php?f=7&t=825

You can reset the RAV4 EV's GOM everyday, if you like:

viewtopic.php?p=20518#p20518


1) MAKE SURE THE CAR IS OFF !!!

2) Disconnect all 3 of the 12 volt battery negative cables, and leave it that way overnight. This will require removal of the M8 wing nut for JdeMO equipped vehicles, or a 12mm socket to remove the M8 hex nut. The cabin climate control will automatically go to OFF with battery disconnect.


***** Next day: ******


3) Reconnect 12 volt battery

4) Hold foot on brake and press START button with key fob nearby just once

5) Energy "fuel" gauge will show Full (16 illuminated segments) and "LO" on the GOM - this is what will indicate a reset GOM

6) Wait for navigation unit to complete its start up (about 20 seconds)

7) Press START with brake pedal depressed a second time. You will hear a clunk of the main battery contactors under the front passenger seat and the dash should indicate "READY". The cabin climate control must be off. If it was not off, there is some issue prior to this step.


********


What is lost and needs to be reset with a 12 volt disconnect:

viewtopic.php?p=20859#p20859

1) Cabin climate control is Off. Make appropriate settings.

2) Stored radio / SiriusXM stations will remain, however your last station listened to will likely be gone

3) Cell phone pairings are not 100%. You may have to delete your phone (and the RAV4 from your phone) and re-pair them

4) Map display mode

5) Volume of navigation voice notifications

6) Random play modes

7) Charge schedule will be retained, but it won't work without hitting the "SAVE" button on the previous screen. Check the programmed settings first, then go back to the previous page to press Save. It won't save the data any other way.

8) State selection from Destination address page


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 Post subject: Re: 30k mile service mileage bump
PostPosted: Tue Feb 07, 2017 3:49 am 
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Joined: Mon Feb 24, 2014 8:51 pm
Posts: 565
Your range is temporarily reduced in Winter due to the cold. Reduction was reset during service.
Your range numbers will drop again depending on your driving and use of the climate control.
First heat wave to 90+ will give you back the range you expect.


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 Post subject: Re: ALL POSTS - GOM - Range Meter - Distance To Empty meter
PostPosted: Mon May 29, 2017 5:10 pm 
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Joined: Sat Jun 01, 2013 3:35 pm
Posts: 61
Location: Irvine, CA
Several months ago the dealer replaced the onboard charger and the GOM hasn't been the same since. Previously when the dealer replaced the motor the GOM slowly returned to normal after a week or so of driving. But after the onboard charger replacement the difference in the GOM reading with A/C on vs A/C off is much greater. I suspect they loaded a new version of the software that has a different calculation for the GOM.

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 Post subject: Re: ALL POSTS - GOM - Range Meter - Distance To Empty meter
PostPosted: Fri Aug 18, 2017 4:31 am 
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Joined: Mon Feb 24, 2014 8:51 pm
Posts: 565
GOM has been at 103 to 110 lately on normal charge.
Suddenly it is up to 130 :roll:

Or did the BMS just shift the rest of the extended range into normal?


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 Post subject: Re: ALL POSTS - GOM - Range Meter - Distance To Empty meter
PostPosted: Fri Aug 18, 2017 6:14 am 
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Joined: Wed Nov 14, 2012 9:50 pm
Posts: 3952
Location: San Diego
smkettner wrote:
GOM has been at 103 to 110 lately on normal charge.
Suddenly it is up to 130 :roll:

Or did the BMS just shift the rest of the extended range into normal?


Was there a loss of 12 volt power?


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 Post subject: Re: ALL POSTS - GOM - Range Meter - Distance To Empty meter
PostPosted: Sat Aug 19, 2017 2:18 am 
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Joined: Mon Feb 24, 2014 8:51 pm
Posts: 565
No that part seems to be working. Makes me want to check the voltage though.
Toyota battery is only a year old.

Today the extended range charge said 147 miles :)
Not sure that is real....

48,000 on the odometer and the battery suddenly is back to new.


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 Post subject: Re: ALL POSTS - GOM - Range Meter - Distance To Empty meter
PostPosted: Tue Sep 19, 2017 10:31 am 
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Joined: Mon May 22, 2017 7:48 am
Posts: 17
smkettner wrote:
.
Toyota battery is only a year old.

.



HOw do you have a battery that's only a year old, in 2017? Did you get it replaced?

BTW I had the same thing happen this week with my GOM (going from around100 to suddenly 130 on regular charge) - but that was after a loss of 12 V power of which I'm still unsure what the cause was (maybe a light was left on or something?) DOing the Tony Test right now (disconnected battery after extended charge) we'll see what it says in the morning ;)


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 Post subject: Re: ALL POSTS - GOM - Range Meter - Distance To Empty meter
PostPosted: Tue Sep 19, 2017 10:37 am 
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Joined: Mon May 22, 2017 7:48 am
Posts: 17
Christopher Castagne wrote:
smkettner wrote:
.
Toyota battery is only a year old.

.



HOw do you have a battery that's only a year old, in 2017? Did you get it replaced?

BTW I had the same thing happen this week with my GOM (going from around100 to suddenly 130 on regular charge) - but that was after a loss of 12 V power of which I'm still unsure what the cause was (maybe a light was left on or something?) DOing the Tony Test right now (disconnected battery after extended charge) we'll see what it says in the morning ;)



Oh silly me! You meant THE 12V BATTERY didnt you?! :oops: (How much was that btw? and how long are these supposed to last? i'm not sure whether I may need to replace mine soon)


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 Post subject: Re: ALL POSTS - GOM - Range Meter - Distance To Empty meter
PostPosted: Tue Sep 19, 2017 5:43 pm 
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Joined: Mon May 22, 2017 7:48 am
Posts: 17
Christopher Castagne wrote:
smkettner wrote:
.
Toyota battery is only a year old.

.



HOw do you have a battery that's only a year old, in 2017? Did you get it replaced?

BTW I had the same thing happen this week with my GOM (going from around100 to suddenly 130 on regular charge) - but that was after a loss of 12 V power of which I'm still unsure what the cause was (maybe a light was left on or something?) DOing the Tony Test right now (disconnected battery after extended charge) we'll see what it says in the morning ;)


NO magic beans - only 134 on extended charge. Think this is the same thing I got last time anyways. Not bad at almost 60k miles now


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