X Series E83 X3 2.5Si (N52K) OFFRD
Emergency closing
Emergency closing is a function for deliberate closure of the Panorama glass sunroof without anti-trap function
(closing-force limitation). Emergency closing may be necessary if someone attempts to reach into the interior of
the car or if mechanical difficulty is experienced in closing the Panorama glass sunroof.
Emergency closing can be activated when the car is stopped or travelling at a speed up to 16 km/h.
To activate emergency closing:
Push the switch for the Panorama glass sunroof in the "close" direction until it reaches its mechanical stop and
hold it there. The Panorama glass sunroof is closed with maximum force and maximum speed without anti-trap
function.
If the Panorama glass sunroof is blocked, the electric motor continues to run until the overheating protection is
activated.
Anti-trap function (limitation of closing force)
Caution: Note initialisation
The Panorama glass sunroof has to be initialised in order for the anti-trap function to work correctly. The
Panorama glass sunroof has to be initialised by service staff.
Anti-trap function is active over the entire range of movement in the closing direction.
The anti-trap function works as follows:
•
The sliding/tilting glass sunroof and/or the sliding visor is opened approx. 20 cm.
•
When closing from the "tilt" position, the sunroof will return to the "tilt" position.
Anti-trap function does not in principle prevent trapping; instead, it limits the maximum permissible force applied
to the trapped object (by limiting the closing force).
To prevent impermissibly high closing forces, there are 2 Hall sensors integrated in each of the electric motors.
The speed of closure can be measured on the basis of the signals from these two Hall sensors. The closing
force is calculated from the speed of closure.
The mechanical forces involved change with ambient temperature and as a result of ageing processes. For this
reason, the closing forces required are adapted during the closing process.
Automatic closing is not possible if anti-trap function fails (on account of defective Hall sensor, for example).
Closing is then only possible with the mechanical emergency mode.
Safety functions
•
Maximum motor ON time
If a motor runs in a single direction for longer than 15 seconds, the SHD control unit will deactivate the
drive (E70: FZD control unit).
•
Overheating protection
The heating of the electric motor is calculated in the SHD control unit (E70: FZD control unit). The outside
temperature is available as a temperature signal (via the body bus or body CAN). Moreover, there is a
temperature sensor on the board of the SHD control unit (E70: FZD control unit). After a certain
temperature threshold is reached the overheating protection is activated. The drive is switched off.
•
Emergency operation
In emergency mode, the Panorama glass sunroof can only be moved in small steps.
Emergency mode is possible in the following conditions:
-
Encoding in the SHD control unit (E70: FZD control unit) invalid.
-
Signal of a Hall sensor implausible
-
Initialisation incomplete
SBT Panorama glass sunroof E53, E61, E70, E83, E91
BMW AG - TIS
12.02.2013 10:32
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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