buzzing, ticking sound

[new2meprius]

I recently purchased a new 2007 Prius. It now has 11,000 miles and I have a question.
When the car is coming to a stop or in gridlock traffic - it makes a sound similar to an egg timer. It's a ticking sound as if you were turning the knob on a minute timer backwards. The dealership told me it was normal and it is the sound it makes when the generator kicks in. I do not recall hearing this in the past. Does anyone know what I am referring to? Thanks for your help.

[dogfriend]

I think the noise you are hearing is the brake accumulator pump - it is the device that provides pressure in the brake system to activate the brakes. I think the noise is normal, I hear it every once in a while.

[djkrs2]

<div class='quotetop'>QUOTE(new2meprius @ Jul 4 2007, 07:20 PM) [snapback]473250[/snapback]</div>

I recently purchased a new 2007 Prius. It now has 11,000 miles and I have a question.
When the car is coming to a stop or in gridlock traffic - it makes a sound similar to an egg timer. It's a ticking sound as if you were turning the knob on a minute timer backwards. The dealership told me it was normal and it is the sound it makes when the generator kicks in. I do not recall hearing this in the past. Does anyone know what I am referring to? Thanks for your help.
[/b]

Where do you hear the noise coming from? I was going to ask a similar question. I hear the same type noise coming from what sounds like under the dash or beside my left foot on the driver's side of the car. I do think I hear it more when I'm breaking. It sounds like something is cycling on for about 3-5 seconds and then goes off.

[dogfriend]

http://priuschat.com/index.php?showtopic=19832&hl=

http://priuschat.com/index.php?s=&show...st&p=305650


http://priuschat.com/index.php?showtopic=3...ake+accumulator

http://priuschat.com/index.php?showtopic=12243&hl=

[Ichabod]

My Prius seems to roll forward when I press the "gas" pedal, and slow down and even STOP when I press the pedal to the left of it...

IS THAT NORMAL??!?


Enjoy the rides folks! You'll probably hear some other weird noises once in a while. Has anyone made a "strange noises heard in the Prius" thread? If no, someone should, and it should be sticky!

[dogfriend]

<div class='quotetop'>QUOTE(Ichabod @ Jul 5 2007, 12:25 PM) [snapback]473607[/snapback]</div>

IS THAT NORMAL??!?
Enjoy the rides folks! You'll probably hear some other weird noises once in a while. Has anyone made a "strange noises heard in the Prius" thread? If no, someone should, and it should be sticky!
[/b]

If you check the last link I posted above, the thread title is "Is this normal?" and the second post lists the source of 4 weird noises that other cars don't make.

[qbee42]

<div class='quotetop'>QUOTE(dogfriend @ Jul 5 2007, 12:49 AM) [snapback]473321[/snapback]</div>

I think the noise you are hearing is the brake accumulator pump - it is the device that provides pressure in the brake system to activate the brakes. I think the noise is normal, I hear it every once in a while.
[/b]

Yep, brake accumulator pump. The Prius can't use engine power for power brakes and steering, since the engine is not always running. The brake accumulator pump supplies power for the hydraulic brakes. You will hear it about every third time you step on the brakes (roughly); the sound will come from the driver's side, somewhere down toward the foot-well.

Tom

[new2meprius]

Hey thanks for the replies. I paid very close attention to the noise today. It does in fact make the sound when I brake, it also makes the sound when I accelerate from a stop. All of this takes place under 25 mpg. especially while city driving (stop and go) It does not happen every time and it sounds like it is coming from the dash. Now it has become a huge annoyance to me. I think your replies are on the right track though, because it does happen around every 3rd or 4th time. Is this something that should be repaired?

[mr_zorg]

<div class='quotetop'>QUOTE(new2meprius @ Jul 5 2007, 08:29 PM) [snapback]473807[/snapback]</div>

Now it has become a huge annoyance to me. I think your replies are on the right track though, because it does happen around every 3rd or 4th time. Is this something that should be repaired?
[/b]

Just crank up the radio and relax...

[mr_zorg]

Dupe. Sorry. I clicked submit a few too many times...