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

ENGINE 276.8 in MODEL 207, 212 as of model year 2014 

ENGINE 276.8 in MODEL 218 as of model year 2015 

ENGINE 276.9 in MODEL 207, 212 (except 212.095), 218 as of model year 2014 

Function requirements for ignition OFF, general points 

• Circuit 87M (engine management ON)
• Circuit 15 ON

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 (N3/10).

Function sequence for ignition OFF 

With ignition OFF, the electronic ignition lock control unit (N73), via the 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 1 (CAN E1) to the ME-SFI [ME] control unit.

If the ME-SFI [ME] control unit receives the "circuit 15 OFF" signal via the circuit 15 relay, the engine is switched off by shutting off the fuel pump (M3), the fuel injectors (Y76) and the ignition coils (T1) are switched off and computer run-on is started.

Information about the partial function "no-load current switch off" is documented in the function description "engine OFF energy management function".

The ground connection "circuit 31" is made from the on-board electrical system battery (G1) over the ground point battery at the front right (W10) and 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 via "circuit 30 fused".