GF07.61-P-3008CY Motor Electronics (ME) Ignition System, Function

GF07.61-P-3008CY Motor Electronics (ME) Ignition System, Function
- up to model year 08


Cylinder arrangement and ignition firing order







The ME-SFI [ME] control unit (N3/10) essentially analyzes the following signals for determining the ignition angle:
^ Air mass
^ Position and rotational speed of the crankshaft
^ Positions of the intake camshafts
^ Positions of the exhaust camshafts
^ Coolant temperature
^ Intake air temperature
^ Knock sensor signals
^ Intake manifold air pressure
^ Engine torque requests

The ME-SFI [ME] control unit interrupts the primary circuit to "circuit 1" of the respective cylinder 1 to 6 ignition coils (T1/1 to T1/6) in the moment of ignition timing.

Ignition angle adaptation
An ignition angle adaptation in the direction "retarded" or "advanced" can take place for the following partial functions:
^ Catalytic converter heating-up
^ Idle speed control
^ Overheating / knock protection
^ Deceleration fuel shutoff
^ Transmission overload protection (for automatic transmission 722.9)
^ Anti-knock control [AKC]
^ Engine torque requests

The ignition angles can only be checked using the DAS.