3 Series E46 316i (M43TU) SAL
The microphone has a directional characteristic which is directed towards the driver.
The arrow on the microphone casing must point in the direction of travel (forwards). If
the arrow on the microphone casing points in the opposite direction, the microphone
must be turned through 180
°
.
3.
Check fitting of felt strip and remove if necessary:
Remove the felt strip if it has been inserted loosely between the cover panel and the
microphone.
The felt strip glued to the base of the microphone casing is not affected.
Remedy II:
Swap the installation locations of the microphone and of the sunroof (SHD) switch (only
possible on E38, E39 of manufacturing period up to August 1999).
This action shortens the distance between the driver and the microphone. On E38, E39
vehicles, this action was incorporated into series production in August 1999.
1.
Unclip both components (microphone and SHD switch) from their retainers and
separate from the connectors.
2.
Remove the cover panel.
3.
Route the cable connections to the other openings on the cover panel accordingly.
4.
Snap the cover panel back into place.
5.
Connect up the SHD switch and the microphone.
6.
Clip the SHD switch and the microphone back into place.
Because of the installation situation, this action is not possible on the E46.
Remedy III:
Install service variant of microphone.
If the part number of the microphone is 84 31 8 374 075 (with yellow label) or 84 31 8 380
319 and the complaint clearly relates to the volume, the microphone must be replaced with
the service variant.
The service variant of the microphone has been optimised for volume but does not
correspond to the specifications of the telephone system in all points. In particular,
distortions can occur when the volume is set to loud, and vehicle background noise can
also be picked up.
Remedy IV:
Explain the background to the customer:
1.
Additional noises in the interior of the vehicle affect the transmission of speech
through the microphone.
For this reason, it is important that the blower outlets are, if possible, not pointing
directly upwards, especially when a high blower speed is selected.
2.
There is also an increased level of interior noise at high speeds, which will generally
make communication via the hands-free system more difficult.
3.
On Motorola telephone systems, complaints of syllables being cut off (only sections of
words are understood, words are not ended, etc.) are not uncommon.
This is caused by the semi-duplex speech transmission. Speech transmission is only
enabled in one direction - the other direction is disabled. This is designed to prevent
feedback within the vehicle. The person speaking from outside the vehicle has priority.
This is caused by the transmission concept and cannot be rectified by any available
actions. The level balance (switch point to enable/disable a transmission direction) can
however be influenced by:
SI Hands-free set: volume too low E38 E39 E46 with communications package (option 6
BMW AG - TIS
19.01.2013 10:09
Issue status (12/2007) Valid only until next DVD is issued
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