GF07.61-P-3005MIK ME-SFI Ignition ON, Function

GF07.61-P-3005MIK ME-SFI Ignition ON, Function
- refinement package
- as of model year 09


Function requirements for ignition ON, general points
^ Circuit 15 ON

Ignition ON, general points
For ignition ON, the engine control in the ME-SFI [ME] control (N3/10) is switched on and the engine prepared for starting.

Ignition ON function sequence
When the ignition is switched on, the EIS control unit (N73) connects the on-board voltage from "tml. 30" to "tml. 15" through the terminal 15 relay (N10/1kP).

If voltage is present at ME-SFI control unit "tml. 15", engine terminal 87 relay (N10/1kR) is actuated with a ground signal. To do this, the relay closes its power contact and the voltage is led from "circuit 30", according to the respective fuses, as "circuit 87 M1" to the ME-SFI [ME] control unit and as "circuit 87 M2/3/4" to the respective sensors and actors of the engine control.
If voltage is present at "tml. 87 M1", the engine control is switched on and an output stage driver in the ME-SFI control unit takes over actuation of the engine terminal 87 relay.

Switching on of the ME-SFI [ME] control unit causes the following functions to be executed:
- For complete security, the fuel pump (M3) is actuated through the fuel pump relay (N10/2kA) (only the first time ignition is switched ON after the vehicle is unlocked).
- For the lamp check on the instrument cluster (A1), the engine diagnosis indicator lamp (A1e58) (or with code (494) USA version the CHECK ENGINE indicator lamp (A1e26)) is actuated by the ME-SFI control unit over the engine compartment CAN (CAN C).
- Data are exchanged with the EIS control unit (tml. 50 signal and drive authorization) over the engine compartment CAN.
- The fault memory in the ME-SFI control unit can be read out and erased through the data link connector (X11/4).
- Correction programming or diagnosis can be undertaken using DAS via the data link connector.
- The throttle valve actuator (M16/6) checks its return spring (via the position of the throttle valve) and may lead to a positioner adaptation.
- The tumble flap switchover is actuated and the tumble flap end positions are checked (except engine 272.969).

The following partial functions which are active for ignition ON are described in the following documents:
^ ME fuel supply, function
^ Correction programming, function
^ Tumble flap switchover ME-SFI function (except engine 272.969)