Lexus GS450H VCU Support Thread

Topics concerning the Toyota and Lexus inverter drop in boards
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mdrobnak
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Re: Lexus GS450H VCU Support Thread

Post by mdrobnak »

Mobert wrote: Wed Jun 03, 2020 6:53 pm Today i measured the bellhousing bolt pattern.
For those who want to add a third mtor or want attach a ICE as Range Extender or want to use the transmission as e-CVT.
Accuracy should be within 0,02 mm.

PLTeec4.jpg
Awesome! Thanks! Definitely will be useful for me.
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Re: Lexus GS450H VCU Support Thread

Post by Kevin Sharpe »

Robbertjanzen wrote: Wed May 13, 2020 6:37 pm I have updated the drawing after some remarks and updates found in the software.
Can you add this wiring diagram to the GS450H wiki? I don't think Damien has seen it listening to comments in his latest video.
This is a personal post and I disclaim all responsibility for any loss or damage which any person may suffer from reliance on the information and material in this post or any opinion, conclusion or recommendation in the information and material.
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Re: Lexus GS450H VCU Support Thread

Post by Jack Bauer »

So the unobtanium inverter interface plug is actually available from Toyota. Just ordered two from my friendly main dealer parts dept. 8.34 Euros each. Will have them in next week. Toyota part number : 9098012A02
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Re: Lexus GS450H VCU Support Thread

Post by xp677 »

That's great news. Do we have a part number on the pins, gaskets, etc as well, or are they included?
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Re: Lexus GS450H VCU Support Thread

Post by Kevin Sharpe »

xp677 wrote: Thu Jun 04, 2020 11:48 am That's great news. Do we have a part number on the pins, gaskets, etc as well, or are they included?
Just to save Damien some time answering your question I tried entering the part number on www.toyota.com and that lead me to this info after a few seconds :)
p1.jpg
a1_82A181A.jpg
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Re: Lexus GS450H VCU Support Thread

Post by Jack Bauer »

Ok so bit of confusion here. Seems the part number we want is 90980-12630 according to this manual :
https://www.toyota-tech.eu/wire_harness_rm/RM06H0E.pdf
Page 127. Problem is my toyota parts guy says its an unknown number. The hunt continues ...
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Re: Lexus GS450H VCU Support Thread

Post by Jack Bauer »

Slow progress. Toyota part number : 82998-12440 gives a 160mm long pre crimped wire with gasket to fit the plug. Is available from Toyota parts.
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Re: Lexus GS450H VCU Support Thread

Post by TFirenza »

Is this the one? been searching with no luck atm

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Re: Lexus GS450H VCU Support Thread

Post by xp677 »

Kevin Sharpe wrote: Thu Jun 04, 2020 12:11 pm Just to save Damien some time answering your question I tried entering the part number on www.toyota.com and that lead me to this info after a few seconds :)
This is very interesting, I did not know that you could search for parts on the Toyota website.

Jack Bauer wrote: Thu Jun 04, 2020 2:10 pm Slow progress. Toyota part number : 82998-12440 gives a 160mm long pre crimped wire with gasket to fit the plug. Is available from Toyota parts.
Also to note is that there are two sizes of pin used in this connector.


90980-12630 is discontinued, 90980-12A02 is available from Japan for approx £3.
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Re: Lexus GS450H VCU Support Thread

Post by Eflyers »

TFirenza wrote: Thu Jun 04, 2020 4:32 pm Is this the one? been searching with no luck atm

Imaged
In the USA, it looks like this is PN: G9260-47010 (check on the back of your plug for the PN). It might be available in the USA, at least, through Toyota dealers online parts departments, like this one: https://parts.lexusofpembrokepines.com/ ... g926047010
I've located plugs like this one as a repair part for an otherwise damaged and unusable $500-700USA(new price) wiring harness. They were not that common, but they were available. This plug may also fit the Gen 3 inverters used in the Prius C (USA), Yaris, and others.
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Re: Lexus GS450H VCU Support Thread

Post by Jack Bauer »

Success! Called my local Toyota parts guy just now.PN: G9260-47010 is indeed the connector housing for the inverter. 12.40 Euros each. Ordered from Japan so will take about a week to get here.
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Re: Lexus GS450H VCU Support Thread

Post by Robbertjanzen »

Kevin Sharpe wrote: Wed Jun 03, 2020 7:57 pm
Robbertjanzen wrote: Wed May 13, 2020 6:37 pm I have updated the drawing after some remarks and updates found in the software.
Can you add this wiring diagram to the GS450H wiki? I don't think Damien has seen it listening to comments in his latest video.
Yes ofcourse!

Please find the latest version 2.4

Also the Download link to Visio file:
https://www.dropbox.com/s/e42971nsftjav ... .vsdx?dl=0
Attachments
GS450H Wiring overview V2.4.pdf
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Re: Lexus GS450H VCU Support Thread

Post by Robbertjanzen »

Jack Bauer wrote: Fri Jun 05, 2020 8:21 am Success! Called my local Toyota parts guy just now.PN: G9260-47010 is indeed the connector housing for the inverter. 12.40 Euros each. Ordered from Japan so will take about a week to get here.
Damn! i just paid 50 for a scrap version :cry:
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Re: Lexus GS450H VCU Support Thread

Post by Eflyers »

Jack Bauer wrote: Fri Jun 05, 2020 8:21 am Success! Called my local Toyota parts guy just now.PN: G9260-47010 is indeed the connector housing for the inverter. 12.40 Euros each. Ordered from Japan so will take about a week to get here.
Are you sure the connector housing in the photo(pretty sure it's PN G9260-47010) fits the Lexus GS450H inverter receptacle? :https://i.ebayimg.com/images/g/jA0AAOSw ... -l1600.jpg
The outside housing indexing slots are in different positions and the small pin count may be different?
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Re: Lexus GS450H VCU Support Thread

Post by Eflyers »

Robbertjanzen wrote: Fri Jun 05, 2020 2:10 pm
Jack Bauer wrote: Fri Jun 05, 2020 8:21 am Success! Called my local Toyota parts guy just now.PN: G9260-47010 is indeed the connector housing for the inverter. 12.40 Euros each. Ordered from Japan so will take about a week to get here.
Damn! i just paid 50 for a scrap version :cry:
Do you have some photos of the connector that goes into the inverter? Also, could you look over the connector with some magnification for 10 digit part numbers (there might be several). The PNs are only 1-2mm high and may start with G92.
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Re: Lexus GS450H VCU Support Thread

Post by arturk »

Robbertjanzen wrote: Fri Jun 05, 2020 2:09 pm
Yes ofcourse!

Please find the latest version 2.4

Also the Download link to Visio file:
https://www.dropbox.com/s/e42971nsftjav ... .vsdx?dl=0
It is not really big deal but to keep diagram most accurate you could replace chart for E81 connector with one I posted here:
viewtopic.php?f=14&t=396&start=190#p10902

Thank you great work on this diagram, super handy!
1998 Jaguar XJR, GS450h drivetrain, 48kWh/96s BMW battery
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Re: Lexus GS450H VCU Support Thread

Post by Jack Bauer »

This video was posted in the comments section of the deep dive and seems to be a teardown of the gs450h gearbox. I think in Russian?
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Re: Lexus GS450H VCU Support Thread

Post by PacEmaker »

Oчень хорошо! These guys are gonna follow your cunning plan Damien!
Geoff

Is this smoke trying to tell me something ... :twisted:
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Re: Lexus GS450H VCU Support Thread

Post by Jack Bauer »

I wish someone would:)
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Re: Lexus GS450H VCU Support Thread

Post by celeron55 »

That brings me some unorthodox ideas.

What if one unbolted mg1 and the power split device from the gearbox, welded the output planetary gearset and sealed the input side with an aluminium plate?

I wonder if the transmission needs oil pressure for its bearings or whether it's just for the output gears and maybe extra cooling. If so, you could use it then without the oil pump as a simple ~100kW motor suitable for propeller shaft direct drive, with a much more reasonable size and weight than that of the whole thing.
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Re: Lexus GS450H VCU Support Thread

Post by xp677 »

The oil is required for cooling - the water cooling is just via an oil/water heat exchanger, oil flow is required to cool the unit.

Have a look at the teardown technical documents, you can see that the oil passages pass between the front and mid housings, these would need to be addressed.

The mechanical oil pump is mounted to the power split device, this could be reused for cooling.

The surface that you are left with is not flat. The easiest solution is to cut the face of the front section down and re use it. Gut the power split device and remove MG1.

Image

You won't save much weight. Weights are listed in the doc.

https://www.osti.gov/servlets/purl/947393

There shouldn't be any issues with the inverter code and lack of MG1, just remove the relevant lines of code.
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Re: Lexus GS450H VCU Support Thread

Post by sfk »

I'm pretty sure the bearings depend on oil circulated by at least 1 of the oil pumps operating. In addition to cooling and actuation of the final output planetary clutch packs.

Interesting idea though. Could reduce a lot of bulk and eliminate the diameter of the bell housing. But you might want to look at the version of this gearbox in the Lexus IS instead. It's similar except doesn't have the 2stage final output. It's called the L210 (as opposed to the L110 in the GS)
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Re: Lexus GS450H VCU Support Thread

Post by Jack Bauer »

Let's keep this on topic please folks. There is a thread for general discussion on the GS450h parts.
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Re: Lexus GS450H VCU Support Thread

Post by RE3Rotor »

sfk wrote: Sun Jun 07, 2020 7:43 pm Interesting idea though. Could reduce a lot of bulk and eliminate the diameter of the bell housing. But you might want to look at the version of this gearbox in the Lexus IS instead. It's similar except doesn't have the 2stage final output. It's called the L210 (as opposed to the L110 in the GS)
Too bad they don't have the IS300h in North America.
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Re: Lexus GS450H VCU Support Thread

Post by Dan--T »

Hello, I'm Looking to build a GS450H based EV using your VCU board.

I've found a 4th Generation 2012-2018 GS450H (Second Generation 450H) quite cheap, does the VCU board work with the later generation GS450H?

Has anybody tried to use the later generation as a base for EV conversion yet?

Thanks
Dan
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