Lexus GS450H VCU Support Thread

[RE3Rotor]

Fits perfectly. Thanks Filip. If you don't mind, we should add this to the wiki.

[Filip]

Great to see! You´re welcome
I don´t mind at all, if I can contribute I'm just happy.

[Robbertjanzen]

I have updated the drawing after some remarks and updates found in the software.

Hope this helps

[jcwright45]

I have updated the drawing after some remarks and updates found in the software.

Hope this helps

Amazing, helps to see the whole picture. Thanks again.

[Kevin Sharpe]

I have updated the drawing after some remarks and updates found in the software.

Hope this helps

Very cool

The HV- contactor would normally use the key switch to ensure it's closed when ever the precharge or HV+contactors are closed.

I would also recommend adding an inertia switch in the 12V supply to the HV- contactor to cut power after a collision.

[arturk]

I have updated the drawing after some remarks and updates found in the software.

Hope this helps

Attached is pinout for Generator Resolver connector (E81)

[Bassmobile]

Anybody help a guy with the part number for this Oil Pump Controller?
Can somebody add this part No. to the Wiki possibly

[arturk]

Here it is

[xp677]

Pretty sure the oil pump controller needs its own thread by now .

[Jack Bauer]

I for one welcome our new oil pump controller overlords.

[Jack Bauer]

GS450H kit build video coming soon.

[Jack Bauer]

[xp677]

Good to know that the JLCPCB rolls of electrical tape come in different colours!

[Bassmobile]

Before I go making videos or writing up How-TO's wanted to make sure that there wasn't already a play-by-play for programming firmware to the VCU over USB with Arduino Studio that I wasn't aware of.

[Jack Bauer]

I certainly have'nt made any. Would be much appreciated.

[Jack Bauer]

CNC machined HV terminal posts now available:
https://www.evbmw.com/index.php/evbmw-w ... term-posts

[RE3Rotor]

CNC machined HV terminal posts now available:
https://www.evbmw.com/index.php/evbmw-w ... term-posts

Can I use the original connection if I have the wiring+connector? I see they are connected to the same two terminals inside the inverter.

[Bassmobile]

Before I go making videos or writing up How-TO's wanted to make sure that there wasn't already a play-by-play for programming firmware to the VCU over USB with Arduino Studio that I wasn't aware of.

I certainly have'nt made any. Would be much appreciated.

As soon as I can get it to work on my own unit I will do so.
Currently, I'm struggling to get both wifi & VCU main firmware to compile. Trouble is with external libraries that the code requires to compile. Without a package manifest it's hard to know what other libs need to be made available to the IDE.
Made an issue on GitHub here -> https://github.com/damienmaguire/Lexus- ... r/issues/2

If anyone could jump on and help out with that, would be much appreciated.

I'm keen on Platform IO https://platformio.org/platformio-ide. It's quite a bit more intuitive than the Arduino IDE. Anyone else using it?

[Bassmobile]

Can I use the original connection if I have the wiring+connector? I see they are connected to the same two terminals inside the inverter.

There should be no issue doing so. So long as the connectors are in good condition, and you can feel confident that they will conduct with no resistance. If it was my project, I would clean the connectors and terminals really well, and use MG 846 high carbon conductive grease on the terminals before connecting them.

Get that grease here: https://www.mgchemicals.com/products/gr ... grease-846

[Eflyers]

CNC machined HV terminal posts now available:
https://www.evbmw.com/index.php/evbmw-w ... term-posts

Can I use the original connection if I have the wiring+connector? I see they are connected to the same two terminals inside the inverter.

Can you measure the dimensions of the connector blades of the receptacle for the battery power in (the bottom one in your photo)? That would be the thickness of the blade, the width, and the length. You might be able to use calipers to do the measurements, or to estimate the dimensions. I'm working with another inverter that has a similar receptacle for battery power in. The connector blades seem to be undersized for the max current they are reported as carrying. This would be 100-200 amps in my case. The blades on my inverter receptacle appear to be silver plated near their ends.
Also, could you include a photo(s) of the connector area of the plug that you have that goes into this receptacle?

Thank you

[celeron55]

Can I use the original connection if I have the wiring+connector? I see they are connected to the same two terminals inside the inverter.

Aren't those the outputs for an AC compressor and a heater? Definitely not enough for supplying the current needed for driving the actual motors, unless you're limiting your GS450H system to something like 30A...

If you mean using those for their orginal purpose, then of course why not.

[RE3Rotor]

Aren't those the outputs for an AC compressor and a heater? Definitely not enough for supplying the current needed for driving the actual motors, unless you're limiting your GS450H system to something like 30A...

If you mean using those for their orginal purpose, then of course why not.

One of the connector comes from the traction battery of the GS450h. If you open up the inverter, the connections actually ties to the two posts behind the block-off plate.

[celeron55]

One of the connector comes from the traction battery of the GS450h. If you open up the inverter, the connections actually ties to the two posts behind the block-off plate.

Wait you're right, there's no other connector for the battery. So one is for original battery on the boost lower voltage side, other one is something on the boost higher voltage side?

So as this inverter has a 30kW boost converter, those are going to be rated for about 100 amps by Toyota. So if you take up all the safety margin, it just might be enough to power the entire system...

EDIT: I wouldn't do it though. I think if you're going to use the GS450H stuff, you want to feed it 400 A, at least sometimes. And you don't want your battery connection to sometimes violently burn up and explode.

[Jack Bauer]

The reason I went out and had those brass terminals made is that to use the full power of the inverter you need to feed HV directly into its main cap thus bypassing the boost converter.

[Eflyers]

This is what Mauswerkz, on his now dormant Blog, did with his GS450H inverter: https://cdn.hackaday.io/images/4500861487049316359.jpg