Automatic stop, basic function - GF07.10-P-1053A

Engine all (CAR) 

General 

Vacuum at brake booster not in specified range Air conditioning system requires engine to be running System or communication error in the following systems: steering, on-board electrical system, brake system, accelerator pedal, transmission, engine For a stationary vehicle, the ECO start/stop function switches the assistance systems engine off automatically and starts it again, as soon as the driver wishes to drive off.

Function requirements 

• Ignition ON (circuit 15)
• Engine management ON (circuit 87 M)
• Coolant temperature between 60 °C and 115 °C
• Transmission oil temperature between 10 °C and 120 °C (automatic or dual-clutch transmission)
• Engine speed in specified value range
• Transmission position D, P, or N
• Accelerator not operated Service brake actuated up to standstill of the vehicle
• Adequate vacuum in the brake booster
• No control intervention functions from the brake and driver assistance systems
• Crash signal not available
• On-board electrical system voltage sufficient
• Interior temperature regulated
• No previous maximum full-stop braking

Function 

During the drive, the involved control units check the required signals (automatic or dual-clutch transmission) for an automatic stop. For this purpose, the combustion engine control unit reads out all relevant data and issues the stop enable during vehicle stillstand if applicable.