HFM-SFI control module position / task / design / function - GF07.51-P-4103D

ENGINE 104.941 up to 31.7.96 except CODE (491) as of model year 97 USA version except CODE (498) as of model year 97 Japanese version 

ENGINE 104.942 /945 /992 

ENGINE 104.943 /944 /991 /994 up to 31.7.96 

ENGINE 104.995 except CODE (491) as of model year 97 USA version except CODE (498) as of model year 97 Japanese version 

ENGINE 111.921 /942 up to 31.8.98 

ENGINE 111.945 up to 31.8.98 in MODEL 202.020 /080 

ENGINE 111.945 up to 31.5.98 in MODEL 208.335 

ENGINE 111.946 up to 31.5.98 

ENGINE 111.960 /961 /970 /977 

ENGINE 111.944 /975 up to 31.7.96 

ENGINE 111.974 except CODE (491) as of model year 97 USA version 

Design 

Fig 1: Identifying HFM-SFI Control Module

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

	Position		GF07.51-P-4103-01D
	Task	In accordance with the analysis of input signals, controlling the functions of: Fuel injection system Ignition system Idle speed control Diagnosis/fault storage Formation of substitute values for "emergency running mode" in the event of signal failure Automatic recognition of mechanical end stop of closed throttle valve Self-adaptation of mixture formation (TWC only) Automatic recognition of vehicle version Drive authorization system/immobilizer
	Function	Engine 104	GF07.51-P-4103-02D
		Engine 111	GF07.51-P-4103-02G
	Input signals control module HFM-SFI		GF07.51-P-0001-05D
	Output signals control module HFM-SFI	Engine 104	GF07.51-P-0001-06D
		Engine 111	GF07.51-P-0001-06G
	HFM-SFI control module voltage supply function		GF07.51-P-3003D