ME-SFI control unit, function - GF07.61-P-5000-02AM
Control of fuel injection system
N3/10The fuel injectors are actuated individually, in line with the firing order Y62(sequentially), on the basis of the input signals and the maps stored in the ME-SFI control unit. The ME-SFI control unit calculates the opening times (injection times) of the fuel injection valves.
Control of ignition system
The ME control unit actuates the cylinder 1 to 8 ignition coils (T1/1-T1/8) according to the input signals and the performance maps stored in the ME control unit. It also calculates ignition angle values and regulates the anti-knock control (AKR).
Control of idle speed control
The ME control unit actuates the throttle valve actuator in line with the input signals and the performance maps stored in the ME control unit.M16/6
Controlling the cruise control
The ME control unit actuates the throttle valve actuator for the cruise control function according to input signals.
Additional cruise control functions are the variable vehicle speed limiter and the individually programmable permanent maximum speed and Distronic.
Drive authorization system/immobilizer
The ME-SFI control unit is always equipped with an immobilizer. N73When the vehicle is locked, the EIS control unit transmits information via the CAN data bus to the ME control unit, which then locks the engine control (blocks).
The engine can be started (start enable) only once the vehicle is again unlocked with the authorized key and the EIS control unit transmits a message to this effect over the CAN data bus to the ME control unit.
Engine speed signal
The ME control unit generates the circuit-proof rpm signal TNA from signals from the crankshaft position sensor (L5) and passes it via the CAN data bus to further control units.
Fuel consumption signal
The fuel consumption signal is computed from the injection times (e.g. 8.2 l/hour) and the current fuel consumption sent to the instrument cluster (A1).
Version coding
The variant coding serves to adapt the ME control unit to different vehicle versions and vehicle equipment by means of matching code numbers. Variant coding is to be carried out with STAR DIAGNOSIS.
Regional, vehicle and equipment variants can be coded.
Computer run-on
After switching off the ignition, the ME control unit carries out a computer delayed-off running, in which certain data memory (e. g. diagnostic trouble code memory) is updated. The period is dependent on the coolant temperature. If the ignition is switched off without starting the engine, the delayed-off running time is always approx. 4 seconds.
Diagnosis/DTC memory
The ME control unit checks its input and output signals for plausibility and recognizes possible faults. They can be read out and deleted in the ME control unit using STAR DIAGNOSIS.
Individual functions can be actuated specifically for diagnostic purposes. These are listed in individual menu items.
The faults are not erased in the ME control unit after circuit 30 is interrupted.
Various engine operating information is transmitted via the CAN data bus by the ME control unit to other control units that are connected to the CAN data bus.