Lexus GS450H VCU Support Thread

[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.

[Robbertjanzen]

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

[Robbertjanzen]

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

[Eflyers]

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?

[Eflyers]

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

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.

[arturk]

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!

[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?

[PacEmaker]

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

[Jack Bauer]

I wish someone would:)

[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.

[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.



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.

[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)

[Jack Bauer]

Let's keep this on topic please folks. There is a thread for general discussion on the GS450h parts.

[RE3Rotor]

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.

[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

[sfk]

From what I understand the 2012 model is a facelift version of the previous generation and mechanically largely the same, but that doesn't mean they didn't change to a new communication protocol or something...

[Dan--T]

2012 is a full model change, totally different car but with same/similar powertrain.

It's the change from MK3 GS S190 to MK4 GS L10

Thanks Dan

[steveknox]

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

I'm wiring up my board with this. Thanks for producing it!
I have 1 question:
The park/neutral position switch diagram appears to have an inconsistency. The numbers & symbols on the picture do not match those on the connection diagram: For example, the pic says:
- B+ == 8
while the connection diagram says:
- B+ == 7

Is this an error or have I missed something?

Steve

[xp677]

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

Toyota use the same protocol on many of their hybrid inverters, so the hardware is likely compatible. The issue is the actual data which it expects, Toyota will certainly have changed it for the newer model.

You'd need access to a working 2012+ GS450h to read the serial data under various driving conditions and work backwards from there.

I'm wiring up my board with this. Thanks for producing it!
I have 1 question:
The park/neutral position switch diagram appears to have an inconsistency. The numbers & symbols on the picture do not match those on the connection diagram: For example, the pic says:
- B+ == 8
while the connection diagram says:
- B+ == 7

Is this an error or have I missed something?

Steve

Go with the Toyota diagrams (light blue boxes with colourful wires). B+ is 7, white wire. I don't know what "pic" you're referring to. The attachment you quoted includes a snip of the Toyota diagram.

The diagrams in the Wiki are all verified correct, as well: https://openinverter.org/wiki/File:Shift_position.png

[steveknox]

Thanks for the clarification. I was inclined to go with the wiring diagram, but got thrown off by the image of the connector front view.

I don't know what "pic" you're referring to. The attachment you quoted includes a snip of the Toyota diagram.

The diagrams in the Wiki are all verified correct, as well: https://openinverter.org/wiki/File:Shift_position.png

The 'pic' I'm referring to is the 'Connector Front View':
Using the `B+` example, the pin is numbered 8, but the wiring diagram says `B+` is 7. I've checked the plug itself, and the numbers in the 'pic' match, so I'm guessing the labels are not correct?

[xp677]

I wouldn't trust that picture, I'd trust the Toyota diagrams and their wire colours.

This is a simple switch, the truth table is posted as part of the Toyota diagrams (which is always nice), so it's easy to verify.

[Jack Bauer]

Well, collected my bits from the toyota dealer this morning. Bad news. Plug does not fit the gs450h inverter. Good news : its fits the Prius Gen 3

[Eflyers]

That's what I was afraid of. Again, if someone with a GS450H wiring harness could hunt for the tiny PN(s) on the plug, it might be available like the Gen 3 one Damian just received. Also, sometimes in the service/ part manuals drawings and PNs of the different plug types are listed. I found PNs and successfully ordered plugs for a Gen 4 inverter in service information that Damian posted in the Gen 4 thread some time ago.
Also, the PN for the smaller resolver/temperature plug that mates next to the plug Damian just received is G9266-47010.

[xp677]

Also, the PN for the smaller resolver/temperature plug that mates next to the plug Damian just received is G9266-47010.

Don't forget, the Camry inverters have this second connector for the resolvers and a perhaps a smaller data connector, while the GS inverters have it all-in-one.

So I guess that means we may need to find the part numbers for two connectors!

[arturk]

Did anyone have success with regen?
I have tried adjusting values of htm_data 63, 64 in the code:

Code: Select all

htm_data[63] = (-5000) & 0xFF; // regen ability of battery
htm_data[64] = ((-5000) >> 8);

but no trace of regen.