Ive been having problems with my HFL generally people i talk to say its very hard to hear me and when i speak numbers im often misunderstood I am an average guy from south jersey i have no accent speech impediments or slur of any kind and it just sometimes sucks Well i take it there and the tech who looks at it has the car in park with the air completely off and she tells me theres no problem and they wont replace it and i say well wat happens when the air is on and she says that I Should Turn Down the Blower im really annoyed does anyone know for a fact if that is what it is.....b/c why should i inconvience myself to use their "convienent" feature......but maybe im just ranting.....

 

I know for a fact that a lot of people got their HFL replaced under warranty. What year is your TL?

 

04.....i dunno what it is about the dealership but they wont do it....i tried bitching and they said if it works for the tech they cant do anything for me.....its bullshit.....but then again im just ranting

 

The service bulletin for HFL replacement is in regards to it not releasing the F-CAN Bus or keeping the HFL unit active after the vehicle is off and draining the battery..

Call quality is not controlled by the HFL system, if possible try a different phone and see how it works; it's possible the phone you're using just has a crap bluetooth stack and does not have good quality.

07+ TLs will automatically lower the blower to level 2 or 3 when a voice command/HFL session is initiated, my car is always on auto CC @ 72 - 73 degrees and I haven't had a problem with call quality, my HFL unit has been replaced and the delay box was installed because it was having issues with releasing the bus system.. I just picked my car up today because of quirks on Friday and they replaced a control unit for the nav/hfl/temp/etc.

 

I think the owners manual suggest you turn the blower fan down to minimize background noise. The system is not perfect. Most people pronounce some words, letters, numbers differently than the norm. The system gets improved just about every year.