7 Series E65 740i (N62TU) SAL
VS-23/Kretschmann
Baugruppe/Group: 65
65 16 02 (942)
weltweit
all countries
Datum/Date:
02/2003
Update: 02/2004
Failure of MOST control units at high outside temperatures
E65, E66
Complaint:
The failure of individual control units of the MOST network that are installed in the rear of
the vehicle, e.g. navigation computer, video module, etc., can cause various fault patterns.
Please note that the failure of a single MOST control unit will result in malfunctions in the
entire MOST network.
Fault patterns encountered are, e.g.:
-
Regularly repeated cracking noises in the audio system
-
The Control Display (CD) remains white or dark, making it impossible to call up
functions from the CD in the vehicle
Cause:
The control units of the individual MOST components or the interfaces within the MOST
network have been exposed to too high temperatures.
To protect the individual components from damage, they are deactivated when a
predetermined temperature has been reached.
If a component is deactivated due to excessive temperature, this will be documented with
an appropriate fault memory entry.
Deactivation occurs principally at high ambient temperatures (>40
°
C).
Affected
vehicles:
E65, E66 without rear compartment monitor (option 603) and without DVD changer (option
696)
Manufacturing period: from the start of series production
Procedure:
In case of customer complaint, perform diagnosis with DISplus or GT1. If an excessive
temperature fault memory entry is diagnosed that can be allocated to a MOST control unit
installed in the rear of the vehicle, install fans in the luggage compartment.
1.
In the luggage compartment, remove the luggage compartment floor trim
(please refer to Repair Instructions 51 47 101), the luggage compartment wheel arch
trim, left and right
(please refer to Repair Instructions 51 47 151
and 51 47 161)
and the luggage compartment partition panel trim
(please refer to Repair Instructions 51 47 140), and also the
floor mat backing, right.
2.
Take the jack from the vehicle and remove the mount for the jack.
3.
Remove the telephone transceiver unit with its bracket (please refer to Repair
Instructions 84 11 620).
4.
Remove control unit cover, left.
5.
Remove the MOST control units from the rear left-hand side of the vehicle, including
the rear basic carriers (for Repair Instructions corresponding to the control units
installed, please refer to TIS).
6.
Remove the left-hand boot lid ventilation.
7.
Install boot lid ventilation with split plates and close off the opening at the lower edge
SI Failure of MOST control units at high outside temperatures E65 E66
BMW AG - TIS
11.02.2013 01:01
Issue status (12/2007) Valid only until next DVD is issued
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