System Description: Description

For a stationary vehicle, stop/start system switches the engine off automatically and starts it again, as soon as the driver wishes to drive off. The fuel consumption and thus the exhaust emissions are reduced by cutting out the engine with the vehicle at a standstill.

Conventional cutting out and starting of the engine with the transmitter key start/stop button continues to be possible.

The ECM permanently performs a system diagnosis and assesses the system conditions for the stop/start system.

All systems participating on the stop/start system permanently check their status and transmit this via CAN communication to the ECM.

When the function requirements are fulfilled, the driver is notified of the stop/start system readiness by the ECO symbol in the multifunction display in combination meter.

The stop/start system consists of the following partial functions:

• Function sequence for automatic engine stop
• Function sequence for automatic engine start
• Function sequence for forced engine start (a start dictated by the system)
• Function for power supply to on-board electrical system