3 Series E93 330i (N53) CONVER
The accelerator pedal module signals the driver's command. This signal is required to check the respective
driving status. (evaluation via DME/DDE)
By pressing the accelerator pedal, the specified speed of the cruise control can be overridden at any time.
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Brake light switch
The brake light switch tells the cruise control system when the brake pedal has been pressed. Cruise control is
deactivated if braking actions are necessary.
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Clutch mode (manual transmission only)
Clutch engagement/disengagement is recognised by the signal from the clutch module.
During the clutch engagement/disengagement process, the engine speed is maintained at an optimal speed
range by the DME or DDE.
After the clutch has been reengaged, the DME/DDE will adjust back to the current torque request from the
Active Cruise Control.
If the engine speed is too high or too low, an audible signal and a Check-Control message prompt the driver to
change gear. The prompt to upshift when the engine speed is too high is only made during the warm-up phase
of the engine.
Important: Only install prescribed rear differential unit.
Active Cruise Control has a variant encoding which is co-ordinated with the differential ratio. If a different
rear differential unit is installed, it may be the case that Active Cruise Control will deactivate itself in manual
transmissions, particularly in the higher gears. In this case, no fault is entered in the fault memory.
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EGS: Electronic transmission control
The evaluated cruise control data is sent from the LDM control unit to the DME or DDE. The EGS evaluates the
data from the DME or DDE.
The adaptive transmission control (constituent component of electronic transmission control) adapts the shift
characteristics of the driving programme to the driver's commands and the driving situation.
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SZL: Steering column switch cluster
The SZL processes all data from the cruise-control system steering-column stalk.
The evaluated switch signals are sent by the SZL through the F-CAN to the LDM control unit.
Signal path:
Cruise control system steering-column stalk -> SZL -> F-CAN -> DSC control unit (acts as a gateway) -> PT-
CAN -> LDM control unit
>
E92 from 06/2006 and
E90, E91 from 09/2006 and
E93 from 12/2006
The LDM control unit is no longer fitted on vehicles with option 544 "Cruise control with brake function".
Because of a software modification in the DSC control unit (DSC Mk60E5), the DSC control unit assumes
control of the functions of the LDM control unit.
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FRM: Footwell module
When cruise control is in operation, the brake lights are actuated during automatic braking (legal requirement).
To this end, a signal must be sent from the DSC to the footwell module via the PT-CAN.
The option "Active Cruise Control" uses the "turn signals" signal from the footwell module for assistance when
changing lanes. In other words, if a left turn signal is given before overtaking, the distance to the vehicle in front
is reduced. The vehicle to be overtaken is "ignored" more easily. Conversely, in the event of a change to the
right-hand lane, a vehicle driving there is registered more quickly.
With the vehicle's own calculated expected lane, the sideways deviation of each monitored object can be
determined for the vehicle's own lane.
[for further information, please refer to SI Technology (SBT) 61 04 04 094]
SBT Cruise control E90, E91, E92, E93
BMW AG - TIS
11.02.2013 12:26
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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