Spooling / ticking noise?

pshady · 09-11-2004, 01:10 AM

do your prii make a spooling / ticking noise sometimes when you are braking or slowing down? it seems to come from the front of the driver side.

is this normal? I'm not sure how to describe the sound, but there is definitely a sound (sometimes).

Frank Hudon · 09-11-2004, 01:16 AM

you mean the sound of regen, kind of a swishing noise.

seeh2o · 09-11-2004, 01:31 AM

A couple of friends of mine say it sounds like jet engine winding down when coming to a stop.

pshady · 09-11-2004, 01:44 AM

ok, so i guess it's normal!

I was starting to worry!

ops:

8AA · 09-11-2004, 08:59 AM

Maybe pshady is refering to the sound I've also noticed coming from under the dashboard. It happens sometimes when I'm driving, but also sometimes when I press on the brake before turning the car on. I assumed that it was from the device connected to the brake pedal that controls regen. The car makes so many interesting sounds when it boots up or shuts down that I didn't really give it much thought.

Maybe some ambitious person with a portable recorder could post some wav files of the various normal sounds the Prius makes. Things like the coolant pump, or the ticking sound from under the dash.

CHART · 09-11-2004, 11:27 AM

Quote:

Originally posted by pshady
do your prii make a spooling / ticking noise sometimes when you are braking or slowing down? it seems to come from the front of the driver side.

is this normal? I'm not sure how to describe the sound, but there is definitely a sound (sometimes).

Shady, you are not insane!! OK, maybe you are insane, but if you are, you have company! The noise you are referring to does happen when you brake and is very noticable in my Prius. I've never taken the time to figure out exactly what it is, but I'm pretty sure it has to do with the car either going into regenerative breaking or from regenerative breaking to physical breaking. It seems to be much more noticable during hard breaking.

Ever notice all of the switches closing and opening when you power up or power down the car? Always reminds me of the beginninng of the Animusic CD (www.animusic.com) where the instruments are powering up.

DaveinOlyWA · 09-11-2004, 12:53 PM

that is a regen braking...

i never would describe it as a ticking sound thou, although the sound of a jet winding down is a very good description.

HTMLSpinnr · 09-11-2004, 12:56 PM

The other noise you could be hearing is the hydraulic boost pump which provides the power brake presure. It consists of a whirring which drops in tone as presure increases, then followed by a click of the relay that turns the pump off (probably pressure activated).

DaveinOlyWA · 09-11-2004, 01:11 PM

that could be as i equate the regen noise as more of a hum than anything

hdrygas · 09-11-2004, 11:29 PM

No ticking but "whirring" or "humming" I have always assumed it was regenerative breaking. I am light on the breaks, I have not been "on" the breaks yet. It really sound like a electric motor spinning to me, but what do I know. We need the monitor thingie. We need to know this stuff.

09-11-2004, 01:10 AM	#1
pshady Join Date: Jul 2004 Location: San Gabriel Valley, CA Posts: 132 My Car: Model: Package: Thanks: 0 Thanked 1 Time in 1 Post Friends: 0	Spooling / ticking noise? do your prii make a spooling / ticking noise sometimes when you are braking or slowing down? it seems to come from the front of the driver side. is this normal? I'm not sure how to describe the sound, but there is definitely a sound (sometimes).

09-11-2004, 08:59 AM	#5
8AA Senior Member Join Date: Feb 2004 Location: Maryland Posts: 497 My Car: 2004 Prius Model: Package: #9 Thanks: 1 Thanked 0 Times in 0 Posts Friends: 0	Maybe pshady is refering to the sound I've also noticed coming from under the dashboard. It happens sometimes when I'm driving, but also sometimes when I press on the brake before turning the car on. I assumed that it was from the device connected to the brake pedal that controls regen. The car makes so many interesting sounds when it boots up or shuts down that I didn't really give it much thought. Maybe some ambitious person with a portable recorder could post some wav files of the various normal sounds the Prius makes. Things like the coolant pump, or the ticking sound from under the dash. __________________ '04 Salsa Red BC9 CN mudflaps (front only) • Back window fresnel lens • Inverted Homelink mirror • F37/R35 Lifetime MPG 51.6

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09-11-2004, 01:16 AM	#2
Frank Hudon Senior Member Join Date: Jan 2004 Posts: 4,146 My Car: Model: Package: Thanks: 0 Thanked 3 Times in 3 Posts Friends: 0	you mean the sound of regen, kind of a swishing noise.

09-11-2004, 01:31 AM	#3
seeh2o Prius OG Join Date: Mar 2004 Location: City of Angels Posts: 402 My Car: 2004 Prius Model: N/A Package: #2 Thanks: 5 Thanked 0 Times in 0 Posts Friends: 0	A couple of friends of mine say it sounds like jet engine winding down when coming to a stop.

09-11-2004, 01:44 AM	#4
pshady Join Date: Jul 2004 Location: San Gabriel Valley, CA Posts: 132 My Car: Model: Package: Thanks: 0 Thanked 1 Time in 1 Post Friends: 0	ok, so i guess it's normal! I was starting to worry! ops:

09-11-2004, 12:53 PM	#7
DaveinOlyWA 3rd Time was Solariffic!! Join Date: Apr 2004 Location: South Puget Sound, WA Posts: 14,711 My Car: 2010 Prius Model: IV Package: Solar Roof Thanks: 203 Thanked 519 Times in 375 Posts Friends: 14	that is a regen braking... i never would describe it as a ticking sound thou, although the sound of a jet winding down is a very good description.

09-11-2004, 12:56 PM	#8
HTMLSpinnr Gen III Forums Moderator Join Date: Dec 2003 Location: Surprise, AZ (Phoenix) Posts: 4,974 My Car: 2010 Prius Model: IV Package: Solar Roof Thanks: 394 Thanked 717 Times in 323 Posts Friends: 20	The other noise you could be hearing is the hydraulic boost pump which provides the power brake presure. It consists of a whirring which drops in tone as presure increases, then followed by a click of the relay that turns the pump off (probably pressure activated).

09-11-2004, 01:11 PM	#9
DaveinOlyWA 3rd Time was Solariffic!! Join Date: Apr 2004 Location: South Puget Sound, WA Posts: 14,711 My Car: 2010 Prius Model: IV Package: Solar Roof Thanks: 203 Thanked 519 Times in 375 Posts Friends: 14	that could be as i equate the regen noise as more of a hum than anything

09-11-2004, 11:29 PM	#10
hdrygas Senior Member Join Date: May 2004 Location: Olympia Wa Posts: 3,650 My Car: 2004 Prius Model: Package: #9 Thanks: 0 Thanked 3 Times in 3 Posts Friends: 0	No ticking but "whirring" or "humming" I have always assumed it was regenerative breaking. I am light on the breaks, I have not been "on" the breaks yet. It really sound like a electric motor spinning to me, but what do I know. We need the monitor thingie. We need to know this stuff.