3 Series E91 330xi (N52) TOUR
The light module does not activate the brake lights unless the vehicle's rate of deceleration is greater than 1m/s
2
.
This prevents the brake lights from flickering on and off.
All-wheel control
Dynamic Stability Control (DSC) specifies the nominal value for xDrive all-wheel control. The DSC control unit
calculates the locking moment for the multi-plate clutch in the transfer box.
The nominal value depends on the vehicle's tendency to oversteer or understeer and wheelslip. The nominal
value is sent via the PT-CAN to the VTG control unit.
The VTG control unit reports the actual set locking moment back to the DSC control unit.
The DSC control unit calculates the locking torque for the multi-plate clutch as follows:
•
Pre-activation = driver's command
•
Driving dynamic control
•
Detection of different tyre rolling circumferences
[for further information, please refer to SI Technology (SBT) 27 01 05 128]
RPA: Run Flat Indicator
The Run Flat Indicator (RPA) is not a dynamic driving control function.
RPA is integrated into the DSC control unit as 4 wheel-speed signals are needed for this function.
By comparing the speed signals for all four wheels, the system detects differences in rolling circumference at the
individual wheels. This enables a gradual drop in pressure to be detected.
[for further information, please refer to SI Technology (SBT) 36 01 04 078]
CBS: Condition Based Service
CBS is not a driving dynamic function.
Condition Based Service, as the name suggests, is a means of ensuring that the car is serviced as and when
necessary. CBS comprises various maintenance operations, e.g. engine oil, spark plugs and brake pads.
The remaining distance for the front and back brake pads are calculated separately in the DSC control unit.
When making the calculation, the condition of the brake pad wear sensors is taken into account (reference point
at 6 mm and 4 mm).
[for further information, please refer to SI Technology (SBT) 00 01 04 070]
Operation
>
E60, E61, E63, E64 and E83
The DTC button is located in the centre console switch cluster (SZM).
>
E90, E91, E92
The DTC button is located between the central air vents in the instrument panel.
The DTC button has 2 functions that can be set by pressing the button for different lengths of time.
Press button
Function
Remarks
short
< 3 seconds
DTC function activated.
DTC indicator light on.
DSC indicator and warning light on.
long
> 3 seconds
DSC is completely deactivated
DSC indicator and warning light on.
This mode is intended for service work
(e.g. brake dynamometer).
SBT Dynamic Stability Control 8Plus E60, E61, E63, E64, E83, E90, E91, E92
BMW AG - TIS
22.02.2013 01:27
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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