Introduction

Introduction

















The Dynamic Stability Control (DSC II) is a further development to the ABS/ASC+T5 traction control system. DSC I was introduced in other markets on the E32 and E31 vehicles with the M70 engine.

The DSC system is designed to improve the lateral stability of the vehicle in all driving situations. Whereby ASC+T is primarily designed for longitudinal stability and providing the optimum traction for driving off, DSC adds lateral stability control to the already proven system.

For any given turning angle and speed of the vehicle, there is a set difference between the rotational speeds of the front wheels. If the rotational speeds of the front wheels vary from this set difference, it means the vehicle is understeering or oversteering through the turn. This could lead to an unstable condition and possible loss of control.

The DSC system is designed to monitor this rotational difference and react to any changes or deviations that might possibly occur. The DSC provides ASC control for the vehicle while driving through corners or any time the vehicle is not moving straight ahead.

In essence, the ASC+T5 becomes a Dynamic Stability Control System with this added feature.

There is only one switch for the ASC/DSC system. The familiar ASC acronym is replaced with DSC. The system is automatically "ON" every time the ignition is switched "ON".

DSC can be switched "ON/OFF" using the DSC switch mounted in the center console. Any faults with the system that affect operational safety of the system will automatically switch the DSC "OFF". The warning lamp in the cluster will illuminate with a faulted or switched "OFF" system.

In contrast to the current M70 engine with ASC control that uses various hard wires for signal communication, the DSC system uses the "CAN" line to signal the EML, DME and AGS control modules for regulation.

In addition to signalling the AGS control module to suppress shifting during ASC regulation, the DSC also signals the AGS to cancel the winter program when the DSC is manually switched "OFF".