I've recently bought an 04 TL w/ Navi and have noticed that the navigation sound is distorted (choppy) with the sound only coming out of the center speaker. Also, the system does not pick up any voice commands.

Music playback and cellphone HFL all work fine.

Any suggestion is much appreciated.

 

Actually, I just realized that the Navi unit pick up voice commands, but it's sensitive to the way the command is said.

So the only issue remaining is the choppy Navi sound.