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Discussion Starter #1
Hello. I have a 2012 xB. I noticed a high pitched whine coming from my engine when the key is in the on position. I cannot identify the sound and it is constant and loud. It almost sounds as if it coming from my tranny. I never noticed it before. Any ideas?
 

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Discussion Starter #2
Or can anyone else verify that they have the same sound?
 

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so the engine is off, you hear the noise?

do you have an aftermarket stereo installed?

do you hear it in the cab?

do you have any mods on the engine at all?

does it go away when you start the car?

how many other questions would you be willing to answer?
 

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Discussion Starter #4
Other than a pro installed sub woofer and speakers it is stock. I have no mods installed (yet). I have a factory head unit as well. If the engine is off and the key is in the on position I can here it. It is a constant high pitched whine. I can hear it in the cab and it is extremely loud. Like an electronic whine. I can't tell if it goes away when the car starts as it is loud enough to drown it out. As far as questions, ask away.
 

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Discussion Starter #6
I don't think it is the fuel pump. It sounds as if it is coming from my transmission to be honest.
 

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If it sounds like one of those professional cameras that make a sound after flashing like its being recharged....it may be your speakers
 

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Discussion Starter #8
I can tell you with certainty it ian't my speakers. It is co0ming from inside the engine bay. I can hear I very loudly when I put my ear between the motor and the intake. so odd...
 

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When something appears wrong, I try to narrow it down. Try to remember when you first heard this sound. Was it before the sound system install or after? One thing you could do is pull the fuses for the system and then check for the sound. Then I would go from there, pulling fuses on other things to try to narrow the problem down. Let us know how you make out.
 

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Well said.
Ex. I heard a slight clattering (like something loose), but only when the tranny was in reverse (try tracking THAT down in the engine bay!). After isolating everything I could think, I found what it was: A couple loose screws on the metal mount at the bottom of my TRD Cold Air Intake. A screw driver and fixed.
Try to think of when noticed and see if you can isolate and locate the source.
 

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When something appears wrong, I try to narrow it down. Try to remember when you first heard this sound. Was it before the sound system install or after? One thing you could do is pull the fuses for the system and then check for the sound. Then I would go from there, pulling fuses on other things to try to narrow the problem down. Let us know how you make out.
Agree. I would disconnect power to the sound system then see if the high pitched noise goes away.
 

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Yeah just keep trying to pinpoint it. At least you don't have to be driving for it to happen since they you wouldn't be able to stick your head in the engine bay :) The whine noise definitely seems like something electrical since it's not the speakers. Are there any parts of the new speaker system in the engine bay? Capacitor, Amp?
 
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