ME-SFI starting function - GF07.61-P-2003F

ENGINE 104.941 /943 /944 /991 /994as of 1.8.96 

ENGINE 104.995 with CODE (494a) USA version with CODE (807) Model year 1997 with CODE (808) Model year 1998 with CODE (498) as of Model year 97 Japanese version 

ENGINE 111.921 /942 as of 1.9.98, 111.943, 111.944 as of 1.8.96, 111.946 as of 1.6.98, 111.947 /973, 111.975 as of 1.8.96 

ENGINE 111.945 in MODEL 208.335/435 as of 1.6.98, 202.020 /080 as of 1.9.98 

ENGINE 111.974 with CODE (494a) USA version with CODE (807) Model year 1997 with CODE (808) Model year 1998 

ENGINE 112.910 /911 /912 /913 /914 /916 /917 /920 /921 /922 /923 /940 /941 /942 /943 /944 /946 /947 /949 /953 /954 /955 /970 /972 /973 /975 

ENGINE 113.940 /941 /942 /943 /948 /960 /961 /963 /965 /966 /967 /968 /969 

ENGINE 119.980 /981 /982 /985 

ENGINE 120.982/ 983 

ENGINE 137.970 

Start quantity control 

Fuel has to be injected additionally during the start operation, in line with the coolant temperature, in order to facilitate starting of a cold engine. The increased quantity of fuel injected is achieved by extending the injection time.

Battery voltage and voltage supply 

The injected fuel quantity is determined by the opening times of the fuel injectors. This opening time is dependent on the battery voltage. The ME control unit extends the injection time in order to compensate the quantity injected if, for example, the battery voltage is low. No further engine start is possible below approx. 7 V.

Post-start enrichment 

After the engine is started from cold enrichment with additional fuel is necessary for a short time. The fuel which precipitates on the cylinder walls, is compensated for by this enrichment, and the engine runs smoothly.

Synchronization of fuel injection and firing order 

In order to achieve correct synchronization of the fuel injection and firing order to the particular cylinder, the order is synchronized during the first revolutions of the engine. The ME-SFI control unit requires the signals from the camshaft Hall sensor and crankshaft position sensor for this purpose.

Ignition at engine start 

When the engine is started and up to approx. 500 rpm, the ignition timing point is controlled only on the basis of the signals supplied by the camshaft Hall sensor. Only once the engine speed has reached approx. 600 rpm is a transition made from the fixed ignition timing point to the ignition timing point calculated in line with the momentary operating state.

Starter control 

The solenoid switch of the starter (circuit 50) is actuated through the starter relay by the engine control unit.

Parking shift lock 

On automatic transmission the engine can only be started in selector lever position "P/N" and when the service brake is operated. The information "selector lever P/N" comes via CAN from the AT control unit (N15/3). The information "service brake operated" comes via CAN from ESP control unit (N47-5).

The drive authorization system inhibits the engine management system. Although the starter rotates, the engine does not start.

	Electronic ignition switch control unit, location/task/design/function	Model 202 as of 6/97, 208, 210 as of 3/97, 210.08 /281	GF80.57-P-4102A
		Model 215, 220	GF80.57-P-4102S
		Model 203, 209	GF80.57-P-4102PP
	ME fuel supply function	Engine 104, 111, 119, 120 in Model 129, 140, 170, 202, 208, 210	GF07.61-P-3004F
		Engine 112, 113, 137 (except in Model 203, 209, 211)	GF07.61-P-3004A
		Engine 112.91/94/95 203 Engine 112.91/94/95, 113.96 in Model 211 Engine 112.912/955, 113.968 in Model 209	GF07.61-P-3004P
	ME-SFI ignition system function		GF15.12-P-0001F
	ECI ignition system function	Engine 137	GF15.15-P-3000L
	ME-SFI start quantity control function		GF07.61-P-3010F
	ME-SFI synchronizing fuel injection and firing order function		GF07.61-P-4009F
	Starter control, function	with MT	GF15.30-P-3000G
		with automatic transmission Engine 111 (except HFM sequential multiport fuel injection/ignition system and M111EVO), 112, 113, 120.983 as of 6/98, 137, 166 up to 8/01, 166 with ACS up to 8/01	GF15.30-P-3000GA
	ETC control unit, location/task	Transmits the information selector lever position P/N via CAN. Transmission 722.6	GF27.19-P-4012G