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 Post subject: Re: RAV4-EV number 2501 - EXCESS 12v LOAD WHEN OFF
PostPosted: Fri Sep 09, 2016 6:57 am 
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Joined: Thu Jan 17, 2013 11:13 pm
Posts: 1680
Location: Los Altos, CA
I don't get it. You know the price of that one part that was replaced on your car costs more than the warranty, but you don't want to buy the warranty. I really like the RAV4 EV, but there's no way I would keep one without coverage outside the bumper to bumper warranty. I've never bought an extended warranty on a car before, but I feel there is ample evidence that I will get my money's worth within the 8 years and 100,000 miles of the Toyota Platinum Warranty.

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2012 Shoreline Blue #1462 w/JdeMO | 2018 Tesla Model 3 LR | 4.32kW Motech/Enphase PV Solar + 2x Powerwall 2 AC| Leviton EVB40 40A & Jesla Home Charging | 2015 e-Golf LE (returned)


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 Post subject: Re: RAV4-EV number 2501 - EXCESS 12v LOAD WHEN OFF
PostPosted: Sat Sep 10, 2016 1:33 am 
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Joined: Mon Feb 24, 2014 8:51 pm
Posts: 565
Yes that is true. The only repeat issue I keep hearing is the transmission noise.
The rest seems to get fixed and stay fixed.

Warranty may say 8yr 120k but half that is already covered.


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 Post subject: 12v current drain & what is a PM-B?
PostPosted: Thu Dec 08, 2016 2:05 am 
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Joined: Tue Jan 08, 2013 6:09 pm
Posts: 46
Suddenly my RAV appeared with a flat battery the other day. This is after having sat for two days. The battery in it is only 6 months old and was fine when tested (yesterday).

I threw an ammeter on there when the car was quiescent and saw current readings between 0.50a and about 2.50a. Most of the time was spent > 2a. I left the ammeter connected for about half an hour to allow for possibilities that maybe the car needed to 'settle down' after having the 12v reconnected and "rebooting". Current drain pattern remained the same. The car was not connected to the EVSE and nothing was going on -- lights out, doors locked, traction battery fully charged, cool outdoor ambient temperatures (san diego), and no sounds of motors (i.e. coolant, etc) running.

This feels like a high amount of current drain. Does anyone here have any comments on this? I found another thread about current drain which was resolved with replacement of an ECU but I didn't come away with a clear answer from that as to what the current drain should be.

Anyway, I did the pull one fuse at a time until it goes away deal and ended up with the fuse called PM-B. Pulling that reduced the current drain down to the 0.50 range where it stayed. Re-inserting caused the current drain to return back to the >2a state. What is a "PM-B" and does anyone here have any thoughts as to what that might mean?

This car does have a JDEMO installed but I don't have any reason to suspect that. However, Tony, if there is a way to temporarily isolate it I might be inclined to do so just to rule that out.

Thanks for any comments!


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 Post subject: Re: 12v current drain & what is a PM-B?
PostPosted: Thu Dec 08, 2016 4:00 am 
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Joined: Mon Feb 24, 2014 8:51 pm
Posts: 565
I assume you read my thread on 12v battery drain issues.

http://www.myrav4ev.com/forum/viewtopic.php?f=7&t=1775

Now that the computer is replaced mine drops to less than 50 milliamps within 3 to 5 minutes.
Was a solid 2 amps when malfunctioning.

PM-B looks like passenger side fuse box #24 "Power Management System"

I never pulled fuses inside but just those in the motor compartment. For me some combination of 9 & 10 would stop the battery drain. These are Multiplex Communication System and Audio System. The computer was apparently not shutting down these items. I was having display issues for many months and eventually failure to charge. All is now back to like new operation.


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 Post subject: Re: 12v current drain & what is a PM-B?
PostPosted: Thu Dec 08, 2016 4:30 am 
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Joined: Tue Jan 08, 2013 6:09 pm
Posts: 46
Yes, that is the thread I reviewed. Thanks for the info. I'm not sure what to make of it as I have not had any problems at all, literally, ever, with the car outside of the well known charge timer thing.

There are no other issues I've observed so far except this draw. If I connect the fully charged battery up.. everything works -- displays, EVSE/Charger, it starts and drives, etc. I just have a 2a drain that will run the battery flat in a day or two...

I wonder if there is a "reset to factory defaults" for the ECU / "computer" that maybe I should try?

The PMB fuse was located in the motor compartment. Linked are some relevant images.

Image
Image
Image


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 Post subject: Re: 12v current drain & what is a PM-B?
PostPosted: Thu Dec 08, 2016 5:28 am 
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Joined: Mon Feb 24, 2014 8:51 pm
Posts: 565
Funny, I never opened that box. My description was right I just assumed it was inside. "Power Management System" #24 listed in the manual.


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 Post subject: Re: 12v current drain & what is a PM-B?
PostPosted: Thu Dec 08, 2016 5:16 pm 
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Joined: Wed Nov 14, 2012 9:50 pm
Posts: 3952
Location: San Diego
Aries wrote:

This car does have a JDEMO installed but I don't have any reason to suspect that. However, Tony, if there is a way to temporarily isolate it I might be inclined to do so just to rule that out.

Thanks for any comments!


It's easy to disconnect JdeMO from the low voltage harness. DO NOT ATTEMPT TO DISCONNECT THE HIGH VOLTAGE UNLESS YOU KNOW WHAT YOU ARE DOING !!! INJURY OR DEATH IS POSSBLE !!!

Start at page 20 in the installation instructions. I recommend disconnecting the 12 volt battery PRIOR to moving these plugs, as you might get a "CHECK EV SYSTEM" error otherwise.

Remove our low voltage wiring harness from the Tesla onboard charger, and then plug the Toyota chasssis wiring harness into the onboard charger (as originally configured).

It's not easy to do, because you can't see the receptacle on the Tesla onboard charger.

Here’s a link to "JdeMO Installation Manual RAV4 EV":

https://www.dropbox.com/s/bgzq16qi65lor ... 4.pdf?dl=0


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 Post subject: Re: EXCESS 12v LOAD WHEN OFF - DRAINING 12 VOLT BATTERY
PostPosted: Mon Aug 21, 2017 1:24 am 
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Joined: Mon Aug 07, 2017 4:55 pm
Posts: 66
Location: Duvall, Wash.
It's a shame that Aries didn't post the conclusion to this saga.

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Regards,
Al Savage
2014 Rav4 EV, Shoreline Blue Pearl, #2609, first use 04Jun2014, 49k miles (Aug2017), OpenEVSE 40A. First DU replacement May2018 59k.
1999 E300 on B100, Tourmaline Green (for sale, not needed now)
http://nissandiesel.dyndns.org


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