SI DSP Amplifier may "Mute" After the Vehicle is Started

GROUP 65 65 19 98 Woodcliff Lake, N.J. February 1999
Sound System, Cruise, Alarms, Monitors
Product Engineering
PERFORM THE PROCEDURE OUTLINED IN THIS SERVICE INFORMATION ON ALL AFFECTED VEHICLES THE
NEXT TIME THEY ARE I THE SHOP FOR MAINTENANCE OR REPAIRS.
SUBJECT:
DSP Amplifier may "Mute" after Vehicle is Started
MODEL:
Situation:
E38, E39
The amplifier may switch to "mute" mode(no sound) approximately 30 seconds after the
vehicle is started. The "mute" mode may only be cancelled by switching the amplifier off/on
again.
Affected Vehicles: E38, E39 with DSP (option 677) produced 7/98 - 9/98.
In order to determine if a specific vehicle is affected by this Service Action, it will be necessary
to utilize the "Service Menu" of the DCS (Dealer Communication System). Based on the
response of the system, either proceed with the corrective action or take no further action.
The Chassis Number Ranges listed below are only for informational purposes and are not to
be considered as the only deciding factor
Model
528i
528iA Sport Wagon
528iA
540i
540iA
540iA Sport Wagon
740iA
740iLA
750iL
750iL
Chassis Number Range
BV56628 - BV56850
BV15013 - BV15058
BV60006 - BV60010
BW62879 - BW63302
BY20033 - BY20400
GT95787 - GT97785
BV95259 - BV95453
GC91009 - GC91057
GM60005 - GM60156
GN90018 - GN90020
DL57396 - DL57679
DN73008 - DN73059
DM24418 - DM25715
DP00005 - DP00328
DH69956 - DH70031
DD73006
Correction:
Procedure:
Check the amplifier for a "Red Dot" and yellow label next to the connectors. If the amplifier
does not have the "red dot" and yellow label, replace the amplifier. If the amplifier does have
the "red dot" and yellow label, do not replace the amplifier.
To check and replace the DSP amplifier:
1. Examine the amplifier at the connections to verify if the "red dot" and yellow label is
attached.
With "Red Dot" and Yellow Label
Do not replace amplifier. No work needed.
Without "Red Dot" and Yellow Label
Replace the DSP amplifier.
SI DSP Amplifier may "Mute" After the Vehicle is Started BMW AG - TIS 18.08.2005 20:41
Issue status (03/2001) Valid only until next CD is issued Copyright Page - 1 -

1. Remove the navigation computer
and CD changer if equipped.
2. Remove the navigation computer
bracket attaching bolts(1) and
bracket (if equipped) to access the
DSP Amplifier connectors
Parts Information: Part Number Description Quantity
65 12 8 386 281 DSP Amplifier - uncoded 1
3. Remove the connectors and the
two top attaching bolts(black
arrows) and loosen the bottom two
attaching bolts(not necessary to
remove). Remove the amplifier
from the vehicle by lifting up and
out(white arrows).
4. Install the DSP Amplifier and
Navigation computer/CD changer(if
equipped). Refer to Service
Information Bulletin 65 14 98 for
coding instructions.
5. Verify correct DSP operation.
Service Action Label
Instructions:
This Service Action has been assigned code number 236. After the vehicle has been
checked, and corrected if necessary, obtain a label (SD 92-095) and:
a) emboss your BMW dealer warranty number in the middle of the label (1);
b) punch out code number 236 printed on the label and,
c) affix the label to the B pillar as shown:
If the vehicle already has a label from a previous Service Action/Recall Campaign, affix the
new label next to the old one. Do not affix one label on top of another one because a number
from an underlying label could appear in the punched-out hole of the new label.
SI DSP Amplifier may "Mute" After the Vehicle is Started BMW AG - TIS 18.08.2005 20:41
Issue status (03/2001) Valid only until next CD is issued Copyright Page - 2 -

Warranty Information: Defect Code: 00 65 27 01 00
Work Package #1
Check the DSP Amplifier for the "red dot"/yellow label no
replacement needed:
Labor Operation: 00 52 549
Labor Allowance:
Work Package #2
3 FRU
Check the DSP Amplifier and replace on vehicle without
CD changer:
Parts Allowance: 65 12 8 386 281 1
Labor Operation: 00 52 523
Labor Allowance:
Work Package #3
4 FRU
Check the DSP Amplifier and replace on vehicles with CD
changer:
Parts Allowance: 65 12 8 386 281 1
Labor Operation: 00 52 524
Labor Allowance:
6 FRU
SI DSP Amplifier may "Mute" After the Vehicle is Started BMW AG - TIS 18.08.2005 20:41
Issue status (03/2001) Valid only until next CD is issued Copyright Page - 3 -