Probably the signal to say the engine is running, so the gearbox ECU will let you change to drive?
I'm thinking more to send a signal to the Gearbox ECU to stop the warning buzzer for Park not selected when ignitions off.
would make sense. or to tell the hydralic pumps to turn on for the gearbox.
Hydraulic pump is always running when engine is
I've seen that video and I thought....that can't be ECVT:0...
However it could be interested to try
Would kill an old CVT box unfortunatly, only just managed to be able to make them to go with bigger engines, thats always been their downfall in the past, will only work well with a small engine.
Now fitting them to 2.0l DERV's and the Toyota Prius' all have them