Dashboard setup for “economical driving”

Based on my ScanGauge, when that happens, the engine's running at about ~1080-1230 RPM at basically no load, usually to either generate coolant temperature or run the transmission oil pump.

 

Possibly - but it's very soft if that's so. The transmission oil pump is part of the transmission, I believe, not ICE driven.

 

It is part of the transmission, but it's driven by the planet carrier, which is driven by the engine.

1:26:43 if it didn't jump there:

On the Prime, it's driven electrically instead, so the engine need not be running for the transmission to be lubricated.

 

Yes thanks, now I see that - and TOYOTA agrees:



What's interesting, being driven by the ICE means that the pump is only lubricating when the ICE is running - or there might be an oil slinging as well by gears sitting in ATF.

I'd thought I'd read somewhere that it's still pumping when the ICE is off - but that must be the PRIME as you mentioned. I assume the PRIME, because it could be driven 20+ miles without the ICE running would need lubrication some other way - hence being pumped electrically.

Any idea how the Gen 3 PIP lubricated it - or did it have an electrical pump too?

 

Gen 3 PiP was mechanically driven off the ICE - that was one of the big things about the Prime, that it finally had an electric pump.