I just reached 150k miles and I'm hoping to DIY the inverter coolant change. I have TechStream so I should have no issues bleeding the system, but I realized I have no idea where the drain plug for the inverter is and can't find any information online. Has anyone here done this job and could point me in the right direction? Even just guidance on what the plug looks like would be helpful (petcock, hex socket, hex bit) but pictures would be extremely helpful.
Thanks!

 

There's a drain plug at the front of the hybrid transaxle case - it's a 10mm hex, there's nothing else like it. Needs a new gasket afterwards, torque is 39nm. You also have to remove the "no. 5 inverter cooling hose" - which has AC lines illustrated around it, you should be able to figure out which one it is by the EPC's illustration for the inverter cooling.

Honestly, it's 3l of coolant in a VERY nonaggressive environment, so I wouldn't be _too_ thorough about it.

Given how the coolant circuit snakes up and down and round and round all over the place, bleeding it right might take some patience - be warned.

 

Do you have a diagram for reference? I did notice a hex bolt in the front of the transmission right in the centre, is that the drain plug?

 

I found a service manual entry that describes it just like Lwerewolf said. It should be right next to the transmission and look like this.

 

I recently did mine. Here is a picture of the inverter drain plug, to help others. It is a 10mm allen hex. It is covered by a splash shield which needs to be removed.

 

Is there any special bleed process or its just a drain and fill?