5 Series E60 525d (M57TU) SAL
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DSC indicator and warning light, ABS indicator and warning light and general brake warning lamp light up
and acoustic signal:
Total failure of the DSC and/or malfunction of the VTG control unit
-> All-wheel drive in emergency mode
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CAS: Car access system
CAS provides input signals relating to terminal voltage (e.g. terminal 15 ON).
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SGM or KGM: Safety and gateway module or body-gateway module
> E60, E61
The KGM replace the SGM as from 09/2005.
SGM: The module is the data interface (= gateway) between the K-CAN, PT-CAN and byteflight.
KGM: The module is the data interface (= the gateway) between the K-CAN and the PT-CAN.
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JBE: Junction box electronics
> E90, E91, E92
The JBE is the data interface (= the gateway) between the K-CAN and the PT-CAN.
The junction box consists of the JBE and the power distributor. The power distributor supplies power to the VTG
control unit.
System functions
xDrive comprises the following functions:
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Control of the locking torque for the multi-plate clutch
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Emergency operation
Control of the locking torque for the multi-plate clutch
The locking torque for the multi-plate clutch in the transfer case can be regulated. This means that the front axle
can be smoothly coupled to the drive train. The drive torque at the front axle can be increased or reduced in
response to the road situation and conditions.
The DSC control unit calculates the locking torque for the multi-plate clutch as follows:
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Pre-activation = driver's command
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Driving dynamic control
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Detection of different tyre rolling circumferences
Pre-activation
The pre-activation circuit reflects the driver's wishes. In other words. the pre-activation circuit is used to
calculate the necessary locking torque.
The evaluation criteria below are taken into account to in determining the driver's command:
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Accelerator-pedal value
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Engine torque
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Engine speed
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Vehicle road speed
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Gear engaged
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Steering angle
SBT xDrive E60, E61, E90, E91, E92
BMW AG - TIS
12.02.2013 15:30
Issue status (12/2007) Valid only until next DVD is issued
Copyright
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