[ChrIS250]

once again... just got an IS250 2 days ago so still a newb lol....

question is... when my Iphone is plugged into the aux input.... there is a whining noise through the speakers that gets higher pitched as i accelerate. sometimes its barely noticable but most of the time you can definatly hear it. Bluetooth is also active and the phone sits in a cradle that is plugged in to the cig lighter.... any ideas on how to make this stop??

edit: only happens when listening to music in AUX MODE. when not in AUX mode i obviously don't hear it...

 

[Inches to spare]

Sounds like your audio feed to your aux input is picking up radiated RF interference from the engine alternator. This is usually caused by a poor ground between the alternator and vehicle chassis and/or possibly by a battery that is starting to go bad. The battery capacity acts as a filter for RF noise from the alternator output. As a battery starts to lose its capacity, it filters less of the RF noise leaving more Radiated RF interference.

I've never heard of cell phones or Bluetooth picking up alternator whine, so it is probably getting induced through the power connection to your cigarette lighter. Do you still hear it if your phone is connected to the aux input without being connected to the docking station/cigarette lighter?

 

[ChrIS250]

I will give it a try in a few.... not really sure. Thank you for the response btw!

 

[k9mosk]

I have the same issue, and noticed it's definately associated with the cigarette lighter. I always leave the ipod unpluged for charging since I have no idea on how to fix it.

 

[Knightshade]

Known issue... it's a ground loop. Lexus has a published fix that is free under warranty.

 

[street277]

if all else fails get one of these... should solve your problem...

Ground Loop Isolator - RadioShack.com

 

[Knightshade]

if all else fails get one of these... should solve your problem...

Ground Loop Isolator - RadioShack.com

That's pretty much what Lexus does for you- installs one of those for free inside the AUX port under warranty.

 

[n2knee]

Ah. I thought I was the only one hearing things.

 

[jasonm4]

That's pretty much what Lexus does for you- installs one of those for free inside the AUX port under warranty.

^^^^THIS. i wouldnt mess with it when there is a free TSIB for you and your car is under warrenty

 

[gk97]

I bought this one from Amazon. Works great! :approve:
Amazon.com: Kensington Noise Reducing Car Audio AUX Cable for MP3 or SmartPhone: Electronics

 

[Knightshade]

That's a 3.5->3.5 plug.

If you want better sound get a DOCK to 3.5 plug so you get a line level out from the device and not an amped one.

(and let Lexus fix the whine issue free if you're still under warranty)

 

[TX1911fan]

I had Lexus do the TSB last week. Works great now.

 

[jamesalin]

Does anyone know which Technical Service bullitin it is so I can direct the lexus dealer to fix it and hopefully not try and screw me on it? Thanks..

 

[jamesalin]

Never mind..found it...

TSIB AU001-07 (2006–2008 LEXUS IS 250, IS 350, 2007-2008 ES 350, LS 460, 2008 LS 600h): NOISE FROM AUXILIARY PORT WITH EXTERNAL DEVICE

 

[n2knee]

I have the same issue, but mine is 2009. The tsb is pre 2009 model year. Am i still covered?

 

[jamesalin]

as long as the car is still in warrenty they will fix it for free. otherwise they will try to charge you megabucks as lexus dealers care only about screwing you. I bought this

Amazon.com: Kensington Noise Reducing Car Audio AUX Cable for MP3 or SmartPhone: Electronics

and it works great. No noise coming from my iphone anymore when i listen and charge at the same time. JL

 

[cr6186]

Sweet a free fix

 

[flashsim]

Yup, sounds like the ground loop issue.