i can hear it in my car, sounds almost like a ground issue you would get with an improperly grounded audio system but its faint. i'm gonna call my dealer and see if they have replaced the ecu in my car yet, its an 09, but just picked it up new a week ago.

I don't want to sound harsh here.. But merely uneducated.


I read a lot of "...we believe it is the ECU......"

So cant the owner and/or the dealer just physically loosen the ecu, place it next to the ear and voilà ("it is the ecu").

You Z guys got a fix for this problem yet???? I've been living with the noise for over 2 months now and I'm about to lose it!

No one I know of here has posted a fix, nor a "definitive" cause yet (for the inside noise believed to be the ECU, not the engine "throttle body" noise).

If you G guys find it first, please come back and post some results, I'll do the same in the G37 forums. Thanks.

John

Do you hear the noise every day? The days I have it, it's there all day. Other days I don't hear it at all. I'm looking for what's triggering it.

I hear the noise everyday. My service manage spoke to his advisor, and they came back to me with this:
*Nissan is aware of the problem
*Only a small amount of the Z's have the issue (prob not reported enough)
*He's willing to replace the ECU; however, he advised to wait until they have a true answer to the cause.

For those who have replaced the ECU, has the noise gone away?

the noise i have is very quiet and does not fluctuate. it is there every day, not matter the temp or any setting in my car. thankfully mine is tolerable.

The noise wasn't present in my car last Saturday until I flipped on the lights to drive in the rain. The noise came on pretty loud at that point. I'm finding that something is triggering mine to start, and once it has started it won't stop that day.

Finally, I went to Nissan dealership for replacing ECU to get fixed high pitch noise today. After the tech replaced ECU, I did test drive and that noise was still there.:mad:WTF!!!? I've been waitng for almost 5 hours at the dealer today!!
So the general maneger called to the nissan department rep. And
They said they found the ECU which has serial number end with B, makes high pitch noise. Old ECU should be change to New one which has serial number end with A. My service maneger checked ECU's serial number on my car and it's end with B. That's why my car still make noise even though they changed to new ECU. My stupid service maneger didn't check it before he placed order.

Anyways...I hope it's true this time.
Dealer just gave me a rent car(sentra) and I have to wait another 1weeks to get it fixed. I will update if its fixed.

P.s/ if anyone need contact number for department rep guy, Pm me:tiphat:

Keep us updated and let us know if the serial # B fixes the problem, thanks :tup:

could you guys with buzzing ECU's go see what yalls last character is? B? A? Z????

:icon18: :iagree:

What's the easiest way to get to the ECU to check?

Where can I got to see if I have serial number ending with a B or an A? The odd thing is that I do not hear that high pitched noise all the time. It seems to be hit or miss. Sometimes it is present, other times it is not. Almost as if the the voltage to the ECU changes ever so slightly, to cause the noise. I have experienced at times that if I hear the noise upon start up, I turn the car off and wait about 10 to 15 minutes and restart it, the sound is not present. Thus, it leads me to believe perhaps it is a grounding issue. If a proper ground is present at all times it helps regulate a constant voltage drop at all times. Either way, the next time I hear that damned noise I am taking it to the dealership for them to "document" in person the issue. I really hate it when the dealership can not recreate the issue for themselves, as it is pretty much a waste of my time of dropping off the vehicle for that day.

Bought new car last week, 8 miles, I hear the noise too.
After so much haggling with the sales/finance guys I doubt if they're gonna entertain me with further whinning and will just yo yo me... unless these issues can be handled by a new set of service techs instead of having to talk to the sales guy again?

Incidently, besides this ecu or whatever it is noise (i heard the recording in the thread - its 100% precise).... i have another small crackling noise under the passenger exhaust... 'ive put 300 miles so far and it hasn't gone yet.