Introduction
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Dynamic Stability Control 8Plus
E60, E61, E63, E64, E83, E90, E91, E92
Note: Vehicles with DSC 8Plus:
This SBT describes DSC 8Plus, which is installed on the following model series:
> E60, E61, E63, E64 (rear and all-wheel drive)
> E83
> E90, E91, E92 (all-wheel drive only)
Introduction
The xDrive all-wheel drive system was introduced on the BMW 5-Series in 03/2005. From this time on, these vehicles are equipped as standard with Dynamic Stability Control (DSC) 8Plus.
DSC 8Plus is an advanced development of DSC 8.
The DSC unit (comprising DSC control unit and hydraulic unit) is even more powerful.
The newly developed switchover valves allow a more precise regulation, especially at low brake pressure. DSC 8Plus is supplied by Bosch.
> - E60, E61 from 03/2005 up to 09/2005 (all-wheel drive) [system overview ...]
> - E60, E61, E63, E64 from 09/2005 (rear and all-wheel drive) [system overview ...]
> - E83 from 09/2006 [system overview ...]
> - E90, E91 from 09/2005 and E92 from 06/2006 (all-wheel drive) [system overview ...]
> - Hydraulic circuit diagram with electrically actuated valves [system overview ...]
The principal new features of DSC 8Plus are:
- Additional functions:
- Brake Standby through precautionary pre-tensioning of the brakes in an emergency
- Brake disc drying on wet roads
- Detection of fading and increase in brake pressure during fading
- Start-off assistant
- Soft stop when braking to standstill
Note: New soft stop function not available on BMW 3-Series all-wheel drive or E83.
For technical reasons, the soft stop function has not been incorporated on BMW 3-Series all-wheel drive or on E83 vehicles.
- 2 additional brake pressure sensors, only in combination with Active Cruise Control (ACC)
New from 09/2005:
> - E60, E61, E63, E64
Introduction of DSC 8Plus on the BMW 5-Series and 6-Series with rear-wheel drive.
From this point time on, the body gateway module (KGM) is the gateway to the PT-CAN.
> - E90, E91
Introduction of DSC 8Plus on the BMW 3-Series with all-wheel drive.
In these vehicles, the junction box electronics (JBE) is the gateway to the PT-CAN.
New from 06/2006:
> - E92
Introduction of DSC 8Plus on BMW 3-Series Coupe with all-wheel drive.
New from 09/2006:
> - E83
Introduction of DSC 8Plus on E83.
DSC is a control system that maintains dynamic stability within physical limits when the car is being driven close to the limits of performance and handling.
It also improves traction.
DSC needs the following input signals in order to discharge its control functions:
- Rate of yaw (measure of movement of the car about its vertical axis)
- Lateral acceleration
- Wheel speeds (measure of the car's roadspeed)
- Steering angle
- Brake pressure
The measured values available are used to calculate how the car is moving at any given instant. The actual condition is compared with nominal values (values in stable driving conditions) that are calculated in the DSC control unit. If the actual condition differs from the nominal values, DSC is activated and initiates brake actions and/or engine control functions.
The advantages:
The intervention of DSC in the engine control and brakes provides outstanding driving stability and traction in all driving situations.
DSC combats negative, dynamic driving forces. This means DSC brings about maximum active safety within the physical limits. DSC thus enhances driving comfort by allowing more relaxed driving.
Notes for service staff
The following information is available for service staff:
- General information:
- Diagnosis:
- Encoding/programming:
Subject to change.