Automatic Stability Control (ASC)

Three different systems are installed:

- Automatic Stability Control (ASC) with engine drag torque control

- ASC+T with engine drag torque control

- ASC+T without engine drag torque control (self-diagnosis only possible by means of flash code).

The peripheral speeds of the wheels are monitored by the wheel sensors. An excessive speed difference between the driven and non-driven (idle) wheels is detected as wheel slip. Consequently, the Electronic Throttle Control (EML) control unit is instructed to reduce the throttle opening. If excessively high wheel spin still occurs, the Digital Motor Electronic (DME) control unit is instructed to retard the ignition timing. As a further measure -

- in ASC (without T), the ignition and the injection are temporarily switched "Off".

- whereas in the case of ASC+T, the spinning drive wheel is braked by way of the brake system.

The ASC is integrated in the Anti-Lock Brake (ABS) control unit. It operates in conjunction with the digital motor electronics DME and the electronic throttle control EML.