Ecu high frequency noise

Huck

Hey guys just took my z in to the shop today for the high pitched mosquito sound coming from the car, and for my door locks randomly locking and unlocking themselves in the middle of the night and while driving. The dealership ordered the part to fix the locks, but when I told them about the high pitched sound from the ECU he didn't believe me. I had him get in the car and turn it on to hear for himself. He heard it, then tried to blame it on my aftermarket cd player, saying it probably wasn't grounded properly. I pointed out that the Cd player was turned off, and that it had been doing it before the cd player was installed (it came in the car when I bought it used, but it wouldn't help to tell him that lol). He is saying that they will fix the locks first and see if that was the problem for the noise, and if not then I have to put a stock cd player in the car before they will do anything.

I'm not that great at dealing with these dealership guys. What are some of my options? I've done enough reading to know that the ECU is the problem. Is there any Nissan documentation talking about this? Something I can show them to prove my claim?


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