ME-SFI ignition OFF function - GF07.61-P-3006MIS

ENGINE 272.9 (except 272.974) in MODEL 221.0 /1 (except 221.095 /195) as of model year 2009/AEJ 08

ENGINE 273.9 in MODEL 216.3, 221.0 /1 as of model year 2009/ AEJ 08

Function requirements ignition OFF, general points

Circuit 87M ON (engine control ON)
Circuit 15 OFF

Ignition OFF, general points

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

Ignition OFF function sequence

If the ME-SFI [ME] control unit (N3/10) receives the "circuit. 15 OFF" signal through terminal 15 relay (N10/1kD), the engine is switched off by shutting off the fuel injection valves (Y62) and ignition coils (T1), and computer power-down is started.

Computer power-down is determined by the ME-SFI [ME] control unit and lasts about 5 s. It can, however, last for some minutes due to various functions (such as On-Board Diagnosis (OBD), Drive Authorization System (DAS), thermal management).

When computer power-down is complete, the engine circuit 87 relay (N10/1kC) is de-energized and the engine control is disconnected from the on-board electrical system (switched off).

System tests are conducted by the ME-SFI [ME] control unit during the computer power-down and the fault memory is updated.

The "circuit 31" ground connection takes place from the on-board electrical system battery (G1) via the battery ground (W10) and a number of ground lines to the electronic ground (footwell on the left) (W34/1).

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".

The following subfunction is described in the following document:

Refueling gas recovery function (with code (494) USA version)

	Electrical function diagram for ignition OFF	Model 216	PE07.61-P-2789-97CAB
	On-board refueling vapor recovery function	With code (494) USA version	GF47.10-P-3004MIS