Switched off 07 Prius during initial ICE cycling

ystasino · 06-11-2007, 11:35 AM

I accidentally powered off the Prius while the ICE was cycling. My senses of reason and routine are weak in the morning.

I didn't see any ill effects after restarting it but I'm wondering what would canceling that initial cycle repeatedly do to the Prius except to improve mpg.

Thanks

**TonyPSchaefer** · 06-11-2007, 12:53 PM

I've shut down at what seemed inopportune times. I question it at the time but them just move on.
I would not foresee any problems but would also avoid doing it regularly.

qbee42 · 06-11-2007, 12:57 PM

It would be a poorly engineered vehicle that lets you shut down when it would cause harm. The Prius is anything but poorly engineered. You would have to start yanking wires or fuses to cause any shutdown problems.

Tom

dogfriend · 09-06-2007, 07:46 PM

It seems to me that the Prius is more immune to this sort of "abuse" than a normal (non-hybrid) vehicle. After all, the thing is designed to start and stop the ICE at the command of the Hybrid ECU, not based on driver input. The oil pump is already pumping oil to the bearings before the Engine ECU adds fuel and spark. The reason the ICE stays on longer initially is to get the Catalytic Converter up to temperature so that it is effective at lowering emissions.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Prius Cycling Team	randreed	NJ - New Jersey	29	02-04-2009 01:16 PM
Back-Up Camera Switched Off	Prianista	Gen II Prius Care, Maintenance and Troubleshooting	4	07-09-2006 09:59 AM
Switched Cell Phones - Won't Connect	rohlrogge	Gen II Prius Main Forum	4	05-13-2006 09:01 AM
Prius Tops in Category in JD Power Initial Quality Survey	Tempus	Prius and Hybrid News	2	05-18-2005 02:07 PM
can the power be switched off while driving (at high speed?)	tp	Gen II Prius Main Forum	9	01-14-2004 01:00 PM

06-11-2007, 11:35 AM	#1
ystasino Senior Member Join Date: Apr 2007 Posts: 395 My Car: 2007 Prius Model: Package: #2 Thanks: 1 Thanked 1 Time in 1 Post Friends: 0	I accidentally powered off the Prius while the ICE was cycling. My senses of reason and routine are weak in the morning. I didn't see any ill effects after restarting it but I'm wondering what would canceling that initial cycle repeatedly do to the Prius except to improve mpg. Thanks

06-11-2007, 12:53 PM	#2
TonyPSchaefer Your Friendly Moderator Join Date: May 2004 Location: Far-North Chicagoland Posts: 10,497 My Car: 2004 Prius Model: Package: #9 Thanks: 39 Thanked 164 Times in 105 Posts Friends: 23	I've shut down at what seemed inopportune times. I question it at the time but them just move on. I would not foresee any problems but would also avoid doing it regularly.

06-11-2007, 12:57 PM	#3
qbee42 Senior Member Join Date: Mar 2006 Location: Northern Michigan Posts: 10,468 My Car: 2006 Prius Model: Package: #7 Thanks: 93 Thanked 387 Times in 289 Posts Friends: 10	It would be a poorly engineered vehicle that lets you shut down when it would cause harm. The Prius is anything but poorly engineered. You would have to start yanking wires or fuses to cause any shutdown problems. Tom

09-06-2007, 07:46 PM	#4
dogfriend Human - Animal Hybrid Join Date: Feb 2007 Location: Carmichael, CA Posts: 4,952 My Car: 2007 Prius Model: Package: #6 Thanks: 277 Thanked 173 Times in 145 Posts Friends: 11	It seems to me that the Prius is more immune to this sort of "abuse" than a normal (non-hybrid) vehicle. After all, the thing is designed to start and stop the ICE at the command of the Hybrid ECU, not based on driver input. The oil pump is already pumping oil to the bearings before the Engine ECU adds fuel and spark. The reason the ICE stays on longer initially is to get the Catalytic Converter up to temperature so that it is effective at lowering emissions.