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 Post subject: Drive Motor Water Pump Failure
PostPosted: Tue Aug 04, 2020 11:28 pm 
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Joined: Mon Aug 21, 2017 12:02 am
Posts: 8
I experienced the dreaded Check EV System message. There was also a brief Battery Overheat Message displayed as I limped home less than one mile in Turtle Mode.

I towed it to Crown Toyota Ontario as they were the closest Toyota Dealer with a RAV4 EV Certified Technician. (I live in Las Vegas) The report came back that it was the Drive Motor Water Pump. The estimate is $1,000 for the pump with 3 1/2 hours labor.

Has anyone else experienced this problem or am I just the lucky one?

Rich S.
Las Vegas, NV
2013 S/N 2079 with 64611 miles


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 Post subject: Re: Drive Motor Water Pump Failure
PostPosted: Wed Aug 05, 2020 6:04 pm 
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Joined: Thu Jan 17, 2013 11:13 pm
Posts: 1851
Location: Los Altos, CA
The pumps are known to fail occasionally. There is one pump for the main coolant loop that cools the drive unit, charger, and DC-DC converter. There is a separate pump and coolant loop for the battery pack. There seems to be some conflict between your symptoms and their estimate since there are two different pumps for those functions.

There is a third pump for the cabin heater coolant loop.

The MSRP of the pumps is only $585.

https://parts.toyota.com/a/Toyota_2012_ ... -8441.html

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 Post subject: Re: Drive Motor Water Pump Failure
PostPosted: Wed Aug 05, 2020 11:55 pm 
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Joined: Sun Sep 03, 2017 3:46 pm
Posts: 51
Location: Ukraine
Shaf wrote:
I experienced the dreaded Check EV System message. There was also a brief Battery Overheat Message displayed as I limped home less than one mile in Turtle Mode.
I towed it to Crown Toyota Ontario as they were the closest Toyota Dealer with a RAV4 EV Certified Technician. (I live in Las Vegas) The report came back that it was the Drive Motor Water Pump. The estimate is $1,000 for the pump with 3 1/2 hours labor.
Has anyone else experienced this problem or am I just the lucky one?
Rich S.
Las Vegas, NV
2013 S/N 2079 with 64611 miles

Which pump were the DTCs read?
Image

Take a look price on https://parts.toyota.com/p/63294326/G90200R020.html
and/or
https://parts.toyota.com/p/63462219/G904033020.html

For reference.
Image

RAV4EV (Model: QEA 38, VDS: YL4DV) Flat Rate for “Remove and Reinstall” (or “Replace”) the pump is 1.1 (+0.2) standard hours.


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 Post subject: Re: Drive Motor Water Pump Failure
PostPosted: Fri Aug 14, 2020 1:51 pm 
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Joined: Thu Nov 02, 2017 8:57 pm
Posts: 45
Location: Salisbury, NC
A few things bother me here:

-the drive unit and battery coolant loops are separate; a failing drive unit pump shouldn't cause a 'high battery temp' alert

-3 hours is a ridiculous time estimate to replace any one of the coolant pumps

-$1000 is way over the factory list price for any of the pumps

As Vlad has pointed out, I would insist on the dealership connecting to the car and using the Tesla Powertrain Diagnostics software to confirm what fault codes were set.


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 Post subject: Re: Drive Motor Water Pump Failure
PostPosted: Fri Aug 14, 2020 4:47 pm 
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Joined: Mon Aug 21, 2017 12:02 am
Posts: 8
Shaf wrote:
I experienced the dreaded Check EV System message. There was also a brief Battery Overheat Message displayed as I limped home less than one mile in Turtle Mode.

I towed it to Crown Toyota Ontario as they were the closest Toyota Dealer with a RAV4 EV Certified Technician. (I live in Las Vegas) The report came back that it was the Drive Motor Water Pump. The estimate is $1,000 for the pump with 3 1/2 hours labor.

Has anyone else experienced this problem or am I just the lucky one?

Rich S.
Las Vegas, NV
2013 S/N 2079 with 64611 miles


There is a happy ending to my short story. The folks at Crown Toyota, Ontario CA replaced the Drive Motor Coolant Pump under the Platinum Warranty (aka Service Agreement). I misquoted the cost in my original post as $1,000 for the pump and 3.5 hours labor. The ACTUAL COST (covered by Service Agreement) was $594 for the Pump and G-48 Coolant with $221 Labor.

Thank you for your interest and contributions to this story.
Rich S.


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 Post subject: Re: Drive Motor Water Pump Failure
PostPosted: Sun Aug 16, 2020 12:30 am 
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Joined: Sun Sep 03, 2017 3:46 pm
Posts: 51
Location: Ukraine
Shaf wrote:
Shaf wrote:
I experienced the dreaded Check EV System message. There was also a brief Battery Overheat Message displayed as I limped home less than one mile in Turtle Mode.
I towed it to Crown Toyota Ontario as they were the closest Toyota Dealer with a RAV4 EV Certified Technician. (I live in Las Vegas) The report came back that it was the Drive Motor Water Pump. The estimate is $1,000 for the pump with 3 1/2 hours labor.
Has anyone else experienced this problem or am I just the lucky one?
Rich S.
Las Vegas, NV
2013 S/N 2079 with 64611 miles
There is a happy ending to my short story. The folks at Crown Toyota, Ontario CA replaced the Drive Motor Coolant Pump under the Platinum Warranty (aka Service Agreement). I misquoted the cost in my original post as $1,000 for the pump and 3.5 hours labor. The ACTUAL COST (covered by Service Agreement) was $594 for the Pump and G-48 Coolant with $221 Labor.

Thank you for your interest and contributions to this story.
Rich S.
Curiously, at such a cost and duration of work, did they perform the mandatory Coolant Air Purge after Replacing Water Pump procedure?
https://youtu.be/JpTVJ-i6GCk

For example,
Image


Last edited by alflash on Mon Aug 17, 2020 10:54 pm, edited 1 time in total.

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 Post subject: Re: Drive Motor Water Pump Failure
PostPosted: Sun Aug 16, 2020 12:30 pm 
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Joined: Mon Aug 07, 2017 4:55 pm
Posts: 215
Location: Duvall, Wash.
For ICE vehicles, it's common to drain the coolant, pull a vacuum on the cooling system and then recharge with fresh coolant, to avoid the air lock problem. This became SOP when hoodlines became so low that it became impractical to have a fill point near the top of the cooling system.

This works because no cooling loop in an ICE's cooling system is valve isolated on both sides of any particular loop, so fresh coolant can "displace" the vacuum.

I've got a compressed-air venturi type vacuum generator around here somewhere for this purpose. I wonder if the Tesla/RAV4 EV's cooling loops could be successfully purged using the vacuum method.

We know some dealers have failed to purge air from the cooling loops in the past during DU replacements, because there have been reports here of the "low coolant" light coming on after a DU replacement and the vehicle having been picked up and driven some distance.

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Al Savage
2014 Rav4 EV, Shoreline Blue Pearl, #2609, first use 04Jun2014, 49k miles (Aug2017), OpenEVSE 40A. First DU replacement May2018 59k.
2018 Model 3 LR AWD, blue. 9.6kw solar
1999 E300 on B100 (sold Sep2018)
http://nissandiesel.dyndns.org


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