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

GF07.61-P-3005MAR 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), through the terminal 15 relay (K40/2kB), connects the on-board voltage from "tml. 30" to "tml. 15".

If voltage is present at "tml. 15" of the ME-SFI control unit, the ME-SFI and chassis relay (K40/4kK) 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 a 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 control of the ME-SFI and chassis relay.

Switching on of the ME-SFI [ME] control unit causes the following functions to be executed:
- For complete security, fuel pump () is actuated by fuel pump control unit (N118) M3(only the first time the ignition is switched ON after the vehicle is unlocked).
- For the lamp check, the ME-SFI control unit actuates the engine diagnosis indicator lamp (A1) on the instrument cluster (A1e58) through the engine compartment CAN (CAN C) (or the CHECK ENGINE indicator lamp (A1e26) for code (494) USA version).
- Data are exchanged with the EIS control unit (tml. 50 signal and drive authorization) over the engine compartment CAN.
- The fault memory can be read out and erased via the data link connector (X11/4).
- Correction programming or diagnosis can be undertaken using DAS via the data link connector.
- The front and rear throttle valve actuators (M16/3, M16/4) check their return springs (through the positions of the throttle valves) and adapt the positions as required.

The following partial functions which are active for ignition ON are described in the following documents:
^ ME fuel supply, function
^ Correction programming, function