Before Start Function

To achieve short starting times the ECM is programmed with a "Before-start" function, which means that a temperature-dependent amount of fuel is injected into all the cylinders when the ignition switch is turned to the Drive position.

When the ignition switch is turned at the next moment to the Start position, fuel is already present at all inlet valves. Together with the double spark (or multispark) function of the ignition discharge module, this ensures extremely short starting times.

The "Before-start" function is utilized by the ECM at engine coolant temperatures up to 6400.

When the ignition is turned off, certain functions in the ECM stay "live" for another 15 minutes. One example is that the ECM inhibits the "Before-start" function from repeating for 15 minutes.