Ignition Off, Function - GF07.10-P-1002MMY

ENGINE 157.9, 278.9 in MODEL 166 

as of model year 2016 

ENGINE 157.9, 278.9 in MODEL 292 

Function requirements for ignition OFF, general points 

• Circuit 87M (engine management ON)
• Circuit 15 (ignition 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 the ignition OFF, the circuit 15 relay (F58kR) is switched off by the electronic ignition lock control unit (N73) via interior CAN (CAN B) and by the SAM control unit (N10). The signal "circuit 15 OFF" is sent redundantly via the chassis CAN1 (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 for partial function "no-load current shutoff" is documented in the function description "Engine OFF energy management function".

Ground connection "circuit 31" takes place by the on-board electrical system battery (G1) over the on-board electrical system battery ground point at the front right (W10) and over a number of ground lines to the ground point on the front right for the lamp unit (W2).

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".