Audio System - Poor Radio Reception/Interference

Date: March 2, 2009

Order No.: P-B-82.85/673

Supersedes:

Group: 82





SUBJECT

Poor Radio Reception Quality / Interference

If you receive customer reports in the above model vehicles of poor radio reception quality or interference, this may be due to a software error in one of the following control units: Tuner Amplifier (216/221) and Audio Gateway - AGW (171/211/219). To remedy, update the tuner amplifier's software to version 25/08 or later, and update the AGW to software or newer. Use DAS 11/08 or newer to perform the software updates.

Notes on Logic 7 Surround and Window Tinting:

When the choice "logic 7" is selected by the user, both tuners produce a permanent surround sound even in marginal reception areas. Earlier generation tuners switched between Mono and Stereo in low/poor reception areas minimizing the possibility of the user to experience this interference. In the new generation tuners/receivers, as the signals get weaker such that when the user is approaching the "fringe" to radio stations coverage, the audio-blend chips inside the tuners will not switch to MONO and therefore it may be perceived by the user that there's an error in the system. Constant Stereo-Mono switching will create an undesirable "picket-fence" audio effect that may also be perceived as poor audio quality by the user. Window tinting / privacy film may also lead to poor reception quality.

Note:
The following allowable labor operations should be used when submitting a warranty claim for this repair. This information has been generated on March 2, 2009. Please refer to Netstar --> Star TekInfo --> Star Time for the most current labor time allowance.





In Case of Warranty, use the table.