ME-SFI ignition OFF, function - GF07.61-P-3006MAS

ENGINES 156.984 in MODEL 216.377, 221.077 /177 as of Model Year 09 /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 control unit (N3/10) receives the "tml. 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 control unit and lasts about 5 s. However, it can also last for several minutes due to various functions (for example, on-board diagnosis (OBD), drive authorization system (DAS), thermal management).

When computer power-down is complete, the engine circuit 87 relay (N10/1kC) is deenergized 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 run-on and the fault memory is updated.

The "tml. 31" ground connection runs from the on-board electrical system battery (G1) through battery ground (W10) and several ground lines to the electronic ground (LH footwell) (W34/1).

When the ignition is OFF, the ME-SFI control unit is powered by the on-board electrical system battery through "tml. 30 fused".

The following subfunction is described in the following document:

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

	Function schematic for ignition electrical system OFF	Model 216	PE07.61-P-2789-97CAC
		Model 221	PE07.61-P-2789-97SAC
	On-board refueling vapor recovery function	With code (494) USA version	GF47.10-P-3004MAS