High pitched tone under hood when car is off - Subaru Forester Owners Forum
User Tag List

 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 15 (permalink) Old 01-01-2010, 06:19 AM Thread Starter
Registered User
 
cardmaker's Avatar
 
Join Date: Jan 2010
Location: maine
Posts: 2
Car Year: 2005
Car Model: Forester
Gallery: 0
Feedback Score: 0 reviews
High pitched tone under hood when car is off

This just started yesterday. Got home after a day of driving, pulled into garage, turned car off and we could hear a high pitched tone coming from the front of the car. Sounds like a whistle. Opened the hood, didnt seen anything. Noticed the sound was loudest when I put my ear down in front of the grill by the subaru emblem on the front of the car. Any ideas what this is? I have seen posts suggesting vacuum hose, but those posters said their car was running. We don't hear this when the car is running,, but maybe because the sound of the engine is too loud. The only way to stop the tone last night after it went on for a couple hours, was to disconnect the battery. Figured it would only run down the battery if left on. Any help is appreciated. It's an 05 Forester. Thanks.

Last edited by cardmaker; 01-01-2010 at 06:21 AM. Reason: forgot make of car
cardmaker is offline  
Sponsored Links
Advertisement
 
post #2 of 15 (permalink) Old 01-01-2010, 07:47 AM
Super Moderator
 
good dog's Avatar
 
Join Date: Jan 2006
Location: Dundas, Ontario, Canada
Posts: 8,123
Car Year: 2008
Car Model: XS
Transmission: 4EAT
Gallery: 0
Feedback Score: 0 reviews
First welcome to the Forum, we hope you stick around and enjoy the shared knowledge we have learned and hope you participate at some point.
Lot's of good reading if you use the Search* function.

The sound you are most likely hearing is the keyless buzzer (chirp) that makes a sound when you lock/unlock the doors with the remote, unless that function has been turned off.

Over time corrosion takes it's toll on the part and you'll hear a high pitched tone or whistle as you describe from the front of the car. The buzzer is located on the radiator support behind the front grill. Not sure if you'll be able to reach it without taking the grille out. You'll see a wiring harness going to the part (hard to describe), the buzzer/ chirper (enclosed unit) can either be disconnected or taken off and clean the terminals before reinstalling. According to my Subaru mechanic this happen a lot especially in the colder months, so moisture and corrosion may be the culprit.
* I knew this had been covered before but when I went to use the Search, I kept getting a message that I hadn't enough words in the search (even though I had more than required). Even the site has issues sometimes.

That hopefully will solve your mystery whistle.

If you do decide to participate on the forum you can add your vehicle info to your Signature. Just go into your User CP,Edit Signature and add vehicle info such as year/model/transmission. That way it will show up every time you post.

2008 2.5XS 4EAT

Last edited by good dog; 01-01-2010 at 07:54 AM.
good dog is online now  
post #3 of 15 (permalink) Old 01-01-2010, 09:38 AM
Contributing Member
 
ferret's Avatar
 
Join Date: Jan 2006
Location: Northern NJ
Posts: 3,354
Car Year: 2014
Car Model: Impreza Ltd
Transmission: CVT
Gallery: 0
Feedback Score: 6 reviews
Hissing (or squeeling, whistling) noise from new Forester

hello! (and help!)

98S, 2014 Impreza 5 dr Ltd (9 Subaru's since 1978, 7 were 5 sp) ILuvSubaru's
ferret is online now  
post #4 of 15 (permalink) Old 01-01-2010, 09:52 AM
The Modfather
 
Peaty's Avatar
 
Join Date: Jan 2006
Location: Lawrence, KS - Rock Chalk
Posts: 7,434
Car Year: 2010
Car Model: Legacy 3.6R Limited
Transmission: 5EAT
Gallery: 0
Feedback Score: 9 reviews
http://www.scoobymods.com/high_pitch...nt-t10447.html

Peaty

2010 Leg 3.6 R, 2013 OB, 2001 OB, 2001 Forester S and 1999 Miata
Peaty is online now  
post #5 of 15 (permalink) Old 01-01-2010, 10:35 AM
Forum Member
 
funkymonkey1002's Avatar
 
Join Date: Jan 2006
Location: Boston
Posts: 9,013
Car Year: 2004
Car Model: 2.5 XT
Transmission: 4eat
Gallery: 0
Feedback Score: 8 reviews
lol had this happen to me yesterday. Its the chirper for the keyless entry that beeps when you lock/unlock. Its right on the center radiator support behind the vertical pillar in the grill. A little round plastic deal with a plug on it. Undo the plug and put some dielectric grease in there to keep it water tight.

04xt/4eat, 16g, STI bits and bobs
funkymonkey1002 is offline  
post #6 of 15 (permalink) Old 01-02-2010, 10:11 AM
Contributing Member
 
toysbyus's Avatar
 
Join Date: Jan 2006
Location: New Hampshire
Posts: 2,934
Car Year: 2003
Car Model: Forester
Gallery: 0
Feedback Score: 0 reviews
Hmmmmm....this sounds like a very high pitched sound that I used to hear from my '03 after the engine was shut off....I also had to hold my head right at the grill to hear it and thought it was just my getting older and listening to too many Hendrix/Journey/Slade albums at full tilt........

Never found out what it is/was but it sounded more like a pressurized hose somewhere near the radiator releasing the PSI as the engine cooled back off......

I don't hear it these days but I'm 5 years older and just haven't heard it anymore......"help, help, I've fallen and I can't get up!".........ha ha ha.......

Steve

2003 X AT
toysbyus is offline  
post #7 of 15 (permalink) Old 01-02-2010, 11:27 AM
Forum Member
 
Join Date: Nov 2009
Location: Truckee
Posts: 14
Car Year: 2005
Car Model: Forestor
Gallery: 0
Feedback Score: 0 reviews
Is that noise? I've been wondering about it for the past year and a half. LOL!
keydiver is offline  
post #8 of 15 (permalink) Old 01-02-2010, 11:45 AM
Forum Member
 
funkymonkey1002's Avatar
 
Join Date: Jan 2006
Location: Boston
Posts: 9,013
Car Year: 2004
Car Model: 2.5 XT
Transmission: 4eat
Gallery: 0
Feedback Score: 8 reviews
Quote:
Originally Posted by toysbyus View Post
Hmmmmm....this sounds like a very high pitched sound that I used to hear from my '03 after the engine was shut off....I also had to hold my head right at the grill to hear it and thought it was just my getting older and listening to too many Hendrix/Journey/Slade albums at full tilt........

Never found out what it is/was but it sounded more like a pressurized hose somewhere near the radiator releasing the PSI as the engine cooled back off......

I don't hear it these days but I'm 5 years older and just haven't heard it anymore......"help, help, I've fallen and I can't get up!".........ha ha ha.......

Steve
Yep thats exactly the sound. I have mine unplugged now until i get some dielectric grease.

04xt/4eat, 16g, STI bits and bobs
funkymonkey1002 is offline  
post #9 of 15 (permalink) Old 01-02-2010, 12:08 PM
Contributing Member
 
toysbyus's Avatar
 
Join Date: Jan 2006
Location: New Hampshire
Posts: 2,934
Car Year: 2003
Car Model: Forester
Gallery: 0
Feedback Score: 0 reviews
To clarify: the sound was almost like the whine that a mosquito makes when it buzzes around your head, so faint and high pitched........it was NOT the key chirp emitter, no way.

Steve

2003 X AT
toysbyus is offline  
post #10 of 15 (permalink) Old 01-02-2010, 04:55 PM
Forum Member
 
neoshi's Avatar
 
Join Date: Jan 2006
Location: 949 The OC/The City 415
Posts: 8,479
Car Year: 05
Car Model: XSsss..
Gallery: 0
Feedback Score: 32 reviews
Check your drive by wire servo on the throttle body.

05 XS
neoshi is offline  
post #11 of 15 (permalink) Old 01-02-2010, 05:02 PM
Dan
Contributing Member
 
Dan's Avatar
 
Join Date: Jan 2006
Location: La Crosse area, Wisconsin
Posts: 4,731
Car Year: 12
Car Model: Premium
Transmission: 5-speed
Gallery: 0
Feedback Score: 0 reviews
As others said, It's likely the piezo chirper for your alarm. Odds are, the noise will go away when outside temps come up. Unplug the little bugger and if the noise disappears then you've found the culprit. Then put in the dielectric grease as suggested.

SHIFT_to_Subaru
'12 Forester, 5spd - hers
'08 Legacy SE, 5spd - hers
'09 OB SE, 5spd - mine
Dan is offline  
post #12 of 15 (permalink) Old 01-03-2010, 09:30 AM Thread Starter
Registered User
 
cardmaker's Avatar
 
Join Date: Jan 2010
Location: maine
Posts: 2
Car Year: 2005
Car Model: Forester
Gallery: 0
Feedback Score: 0 reviews
Success! It was the chirper. My husband took it out, dried it and sealed it and put it back in. The noise is gone. Thanks for the post with the photos, made it much easier. Now, the only problem is, the bottom clip that the grill slides on to broke. It looks like 'the buckhorn site on a rifle' which is how my husband describes it. It slides up on the grill. Anyone know of a cheap place to get one rather than a dealer?? Thanks for all your help.

2005 Forester 2.5X, Auto
cardmaker is offline  
post #13 of 15 (permalink) Old 02-04-2011, 10:16 PM
Registered User
 
Join Date: Feb 2011
Posts: 1
Car Year: 2004
Car Model: Forester
Gallery: 0
Feedback Score: 0 reviews
worked

Had the same problem today on my 2004 Forester. It's been cold and icy, and today it got warmer and wetter. I couldn't figure out how to unplug the Piezo, but when I wiggled it the pitch changed. I used a hair dryer to dry it out and it stopped ringing. Hopefully the sound doesn't come back, thanks for saving me a trip to mechanic, I hope.
erikd is offline  
post #14 of 15 (permalink) Old 12-15-2013, 08:36 AM
Forum Member
 
joebags's Avatar
 
Join Date: Sep 2013
Location: NEPA
Posts: 3
Car Year: 2003
Car Model: Forester
Transmission: auto
Gallery: 0
Feedback Score: 0 reviews
Very happy to find this thread, it was bugging the hell out of me while shoveling.
joebags is offline  
post #15 of 15 (permalink) Old 12-15-2013, 09:00 AM
Contributing Member
 
toysbyus's Avatar
 
Join Date: Jan 2006
Location: New Hampshire
Posts: 2,934
Car Year: 2003
Car Model: Forester
Gallery: 0
Feedback Score: 0 reviews
Just fell onto this thread again after 3 years….is THAT what the sound is? No wonder my noise seems to have faded away over the years………a hose releasing pressure would have kept going and possibly gotten worse…..

Of course, I AM 3-4 years older now so perhaps the sound is still there but my hearing hasn't gotten sharper???

2003 X AT
toysbyus is offline  
Sponsored Links
Advertisement
 
Reply

  Subaru Forester Owners Forum > Technical Forums and Vehicle Assistance > Problems, Maintenance, and Warranty

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Subaru Forester Owners Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome