Ignition OFF, function - GF07.10-P-1002MMO

ENGINE 276.9 in MODEL 212.095 up to model year 2014 

Function requirements for ignition OFF, general points 

• Circuit 87M (engine timing ON)
• Terminal 15

Ignition OFF, general points 

For ignition OFF, first the internal combustion engine and then the engine timing are switched off in the ME-SFI [ME] control unit (N3/10).

Function sequence for ignition OFF 

For ignition OFF, the electronic ignition lock control unit (N73), via interior CAN (CAN B), and the front SAM control unit with fuse and relay module (N10/1) switch off the engine compartment circuit 15 relay (N10/1kJ). The signal "circuit 15 OFF" is sent redundantly via the chassis CAN (CAN E) to the ME-SFI [ME] control unit. The ME-SFI [ME] control unit transmits the signal "terminal 15 OFF" via the hybrid CAN (CAN L) to the power electronics control unit (N129/1) and the battery management system control unit (N82/2). The request "open contactor" is transmitted by the ME-SFI [ME] control unit via the hybrid CAN to the battery management system control unit.

If the ME-SFI [ME] control unit receives the signal "circuit 15 OFF" via the circuit 15 relay, the following components are switched off and the computer run-on is started:

• Fuel pump (M3)
• Ignition coils (T1)
• Fuel injectors (Y76)

The ground connection "circuit 31" takes place from the on-board electrical system battery at the rear (G1/11) via the rear ground point on the right (W8/8) and over a number of ground lines to the ground point for the electronics assemblies compartment on the left (W16/5). When the ignition is OFF, the ME-SFI [ME] control unit is supplied with power from the on-board electrical system battery at the rear via "circuit 30 fused".

Information for partial function "no-load current shutoff" is documented in the function description "Engine OFF energy management function".