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I have a 2004 FX35 Sport pkg that has been at the dealers for 3 weeks for a electrical hissing noise coming through the speakers, even when the audio is powered off. I am now being told that they are going to replace the main wiring harness. I'm nervous :( about the dash being pulled, what else should I be worrying about?

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this may be related to another problem that is manifest when trying to use rear AV inputs. This is a post I left on Freshalloy.com regarding the ground loop issue. Hope it helps isolate your problem as well.


Several threads discuss the buzzing noise and poor picture in rear AV system when attaching a Gamecube, xBox or playstation. The problem is due to a ground loop affecting the AV inputs (reveresd polarity due to design or manufacturing flaw). You can work around it by adding a ground loop isolator (around $20 at Radioshack - http://www.radioshack.com/product.asp?c ... id=270-054). You will also need a very good DC inverter due to some other problem. I used a 150 Watt pure sign inverter purchased on the Web for around $135 (http://www.donrowe.com/inverters/puresine_150.html.) Multiple modified wave inverters up to 400 Watts did not work well. Oddly, the gamecube works fine with just a $20, 75 Watt modified wave inverter in a Dodge minivan or Lexus RX. I notified Infiniti of the problem after my dealer said the problem was in every FX with rear AV in their stock (unfortunately concluding it was not the car's fault). I think Infiniti should isolate and fix the miswired component before it causes other problems. If you concur, contact Romero @ customer relations 800 662 6200 (option 7, extension 8405) and let him know you are also having the problem. All info is documented there as reference # 4674261
 

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Looking for feedback as I currently have the same hissing. Problem started when my fx flat-lined on me at 1100 miles, no power to the vehicle but battery was connected properly and functional. Quirk (boston) had 2 weeks, diagnosis...frozen fuel filter????!!!!! Claim of relay/sensor for fuel pressure will cut power to pump and starter???? Called corporate and finally spoke to corporate tech support (no small feat) and was advised this was true but should not have cut entire power (not even an interior light! Problem was never diagnosed or resolved, but it has not occurred again. My hissing in speakers started the first morning I got the fx back.
I know this somes quite lame, but there must be problems in paradise in my relationship with my fx as she has now 4 times locked herself. The first time I figured I must have hit the lock on the handle or accidently hit my remote, though the keys were in the ignition and I did not hear the arming chime. Now I'm certain
shes bewitched! These have all occurred in the past 2 months, from 9000 miles on my fx. We have not been to a dealer recently
for anything. I'm curious if the fx does have a timed locking feature
or if I have some serious electrical gremlins. Better to have the tranny fall in the road and replace than deal with the unknown bizzaro world of random faulty electrical. I live in No. NH. and can't
afford to get stranded again.
 

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Can't be sure if its related to the wireing flaw in the av systems. It is possible that the wiring responsible for the ground loop also is tied to other systems. Once Infiniti isolates the cause of the AV problem, I'll post their conclusion. Once there is a specific issue to check, it may help to see if that could be related to the problem you are seeing. If you're under warranty, I'd bring it back and ask the dealer to find and fix the prblem. It will most assuredly not go away on its own and I think your door problem is related to the buzz.
 

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Well I'm 2 days returned from inifiniti of nashua for my mysterious speaker sounds/hissing when the stereo is OFF...hissing seems to be getting louder. Resolution..."Gee...were surprised you can even hear the hiss it is so faint...I guess some people are more aware than others" READ...Efficient acute hearing is a trait that is not recommended if you intend to purchase a new FX! It gets more outrageous though..."We pulled 3 new ones off the lot that also exhibited the speaker hiss. Infiniti has no file on the problem so there is no fix, you'll just have to live with it...or take it up with infiniti". Now this is exactly what I wanted to hear. Today I'm going to do just as was suggested, I'm calling infiniti. Wish me luck.
Disappointed Dave
 

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Discussion Starter #6
Update - The main wiring harness on my FX was replaced this week. THe Hiss is now gone (for now). New problem, my big fear, the brake light in the instrument panel will not go off! A new circuit board has been ordered. I have written to infiniti... with no response other than from the dealer to date...
 

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Touring package here, have the hiss. I got the "pulled 2 cars off the lot and they have it" response from the dealer.

Thanks for the contact info.
 

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steves said:
contact Romero @ customer relations 800 662 6200 (option 7, extension 8405) and let him know you are also having the problem. All info is documented there as reference # 4674261
Just to isolate the contact person name and #
 

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I have the same hissing problem from all of my Bose speakers (2005 FX35 Tour/Tech/Sport) when the ignition is turned to the ACC ON position and the radio is either off or on.

Romero is no longer working there, but I talked to a Maryanne and she hasn't heard of this issue before. She advised me to go to the dealer first and tell them I have a reference number. I am pretty sure my dealer will say that it's normal because the other FXs on the lot have it, or that it's barely audible and I'm being too critical about it. It's not loud, but it's noticable even while driving along (especially for slow/quiet songs).

I might wait until my first maintenance appt to address it, but will definitely post whether the issue is resolved or not. I'm surprised there hasn't been a TSB on this yet.

----------

Maryanne - Infiniti Customer Care
(310) 771-3876
Ref #4887241
(complained on 03/18/05)
 

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Ditto... called, tried to get Romero, he's gone. Can't remember the guy's name that I dealt with but he hadn't heard of the issue. His direct line is 310-771-3863, Ref# 4874076. I'm going to pursue this with the dealer next week.

If people can list the people they are dealing with, their phone number and Ref#, it should help everyone out.
 

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This post has been dead for a while...

Finally brought my car in for service and had them look at the speaker hiss issue. Both the advisor and the tech both said they could not hear anything wrong so nothing was done about it. I knew I'd get this sort of response. I kept telling them it's probably a wiring harness issue, but they want to investigate it futher with corporate.

I'll have to follow up with Customer Care again...
 

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ARGH!!!!

Ok, so my SA says corporate has never heard of a speaker hiss issue. He also said that the other FXs on the lot have speaker hiss, too, so it's a normal thing. WTF? This guy admitted to having hearing problems and couldn't hear the hiss on my car, so how can he say he heard hiss on the others? I knew they were going to say that there's nothing wrong.

I then called customer care again to bitch and bring up "steves" and "tazdevil's" reference numbers. MaryAnne responded that "steves" is unrelated b/c he was trying to hook up some video game system to the FX and that "tazdevil's" wiring harness was replaced. OK, so why can't mine be replaced? "Because the dealer has to be able to duplicate the problem"... whatever the f'er that means. "Try taking my FX to another dealer for a 2nd opinion", she ever so helpfully suggests, and that "the other two cars are '04s while mine is an '05 so the fixes may not be related"!!! Yeah, like going to Bethesda from Dulles is the most convenient thing for me. Now Maryanne says she has to transfer the case to their "east coast reps" to take care of it since she's in LA. Why the f'er did I have to deal with her in the first place then? And what does east or west coast have to do with it? Just fix the **** thing!!! :evil: :evil: :evil: :evil: :evil: It will be interesting what happens next...
 

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Now the "east coast specialist" says that Infiniti can't force a dealer to make a fix even if it's obvious. I was told, yet again, to take the car back to the dealer to duplicate the problem or take it to another dealer #)$(@#$) Surprise Surprise. The **** dealer ain't gonna do anything about it. What's wrong with DC area dealerships with their incompetent, snobby, anti-customer service, anti-mod attitutdes?
 

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Here's my experience.

Dealer didnt replace the harness. They replaced the amp. Didn't help. Dealer keeps telling me this is normal and Customer Care didn't do ****. I call bullshit.

My advice, send a email to Carlos Ghosn, President of Nissan (maybe Renault as well these days), include any other reference numbers from other people, state that we all want our wiring harnesses replaced ASAP and it is up to Nissan/Infiniti to get in touch with us to do it. Tell him we are getting stonewalled at the dealer, customer care techs are (for lack of a better word) incompentent and if he thinks that speaker buzz coming from the stereo when it is off or on in a $40K plus car is acceptable, he's an idiot.

Honestly, I'm giving the Toyota FJ some serious consideration at this point or I'm getting another Lexus. FYI I have a friend who works in Toyota planning, they are souping up the entire Lexus line to compete more directly with BMW/Infiniti.

Like my FX, but I don't think manufacturing is at the same level as Toyota/Lexus and I want something that is more capable from a 4 wheel drive/adverse condition perspective. Also, service levels vary so much between dealerships,.
 

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CAR54 said:
"tazdevil's" wiring harness was replaced. OK, so why can't mine be replaced?
Felt like resurrecting an old thread. Heard the hiss again today... drove with the stereo off for the first time. FYI they just replaced my amp, they didn't replace the wiring harness.

Anyone else have any luck resolving this?
 

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tazdevl said:
Anyone else have any luck resolving this?
I hate to break it to you guys but this really IS normal. Try sitting in a vehicle with a Bose system in it, turn the volume all the way down, & listen to the hiss coming out of the tweeters. Regardless of whether the engine is running or not you wil get the hiss.
The only diff btwn those vehicles vs our FXs is that the hissing stops when you turn the audio off on theirs. Since we have navigation in our FXs the amp never turns off unless it's thru the ignition switch.

:eek:nfire: How many of you have this problem & don't have navigation?

Having been in the car audio business (& still am) I've experienced this type of hissing. A lot of the times it's due to a audio source (head unit or radio or whatever you want to refer it to) that can't provide a strong enough signal to the amp & in order to compensate for that the gain/volume control on the amp has to be turned up high. In doing so you're inviting all types of noise, aka hissing, to be amplified as well.

The dealer did the correct thing in replacing the amp, even though that didn't resolve the issue. Replacing the main wiring harness would be the last resort I'd take. Have you guys ever seen what goes on when replacing the wiring harness? Just about everything comes out in order to do so & not everything will go back in the same way. I suggest you thank your dealer for not attempting to do that. [-o< lol
 

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Don't care if you're an audio engineer that designs amps, it is unacceptable in a $43k car.

No NAV here and there are others with the Touring package that are experiencing the same issue.

If they screw it up, just means I'll be driving a G35 loaner for a while while all the issues get taken care of under warranty.

Bottom line is that replacing the wiring harness has worked for a couple people. What we need are the reference numbers to use as justification.

One way or the other, I'm getting the wiring harness replaced and that hiss out of my car before it drives me f**king crazy. Anyone else notice that it's louder when it's cold out?

I find myself driving my SC430 a lot more at the moment because of the hiss and the fact that even as a convertible, it has no interior rattles to the FX's many.
 

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What is it that's ticking you off? Is it the fact that there's hissing when the radio is off or just the hissing in general?
 

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Both. The hissing (in my case) is loud enough that it sounds like static coming through the radio... even though it's turned off.

The other thing that bothers me about it is the fact that it doesn't happen to some people, happens to others. People have reported the issue to Infiniti Customer Service, yet they aren't tracking it. Also, the reps aren't sharing info so any time you call, it's something new.

Having managed products in high tech... things that are inconsistently consistent are a bitch to track down but in most cases are caused by poor quality/design on the front end or lack of controls/attention to detail on the back end.
 

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I am a lil surprised that the hissing doesn't go away while the radio is off [on the non-Tech FXs]. That just means that the amp is staying on when it shouldn't. I double checked with the wiring info on the '03 FX & it confirms that the amp turn-on signal is/should be coming from the radio. I wonder what's keeping the amp on when there's no nav on yours. :? I guess you could have the dealer check for that if not anything else.
 
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