Ignition Off, Function - GF07.10-D-1002TSB

Engine 274 in model 907 

Block diagram 

Function requirements for ignition OFF, general points 

• Circuit 87M (Engine management ON)
• Terminal 15

Ignition OFF, general points 

With the ignition OFF, first the engine and then the engine management are switched off in the ME-SFI [ME] control unit (N3/36).

Function sequence for ignition OFF 

With the ignition OFF, the circuit 15 relay 1 (F152kA) is switched off by the electronic ignition lock control unit (N73/8) via interior CAN (CAN B) and the SAM control unit (N10).

The signal "Circuit 15 OFF" is transmitted redundantly via chassis FlexRay (Flex E), powertrain control unit (N127) and engine CAN (CAN C1) to the ME-SFI [ME] control unit.

If the ME-SFI [ME] control unit receives the signal "Circuit 15 OFF" via the circuit 15 relay 1, the engine is switched off by shutting off the fuel pump with fill level sensor (M3/6), the fuel injectors (Y62) and the ignition coils (T1) and computer power-down is started.

The ground connection "circuit 31" is made by the on-board electrical system battery (G1) via the battery ground point (W10).

When the ignition is OFF, the ME-SFI [ME] control unit is supplied with power from the on-board electrical system battery via "circuit 30 fused".