Intake air temperature correction function - GF07.61-P-4028F

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 

Shown on Engine 119 

Task 

Reducing the thermal stresses on the engine at high temperatures.

Design/function 

The ignition timing point is retarded by the ME-SFI control unit in line with the intake air temperature (charge air temperature in the case of supercharged engines) and "load" (engine speed and air mass).

The ignition timing point is retarded only if the engine is operating at a high load and begins from an intake air temperature of approx. +35 °C and reaches its maximum at approx. +65 °C.

Example for full load:

35 °C → (retarded 3.5° crank angle)

45 °C → retarded 6.3° crank angle

65 °C → (retarded 9.5° crank angle)

The following information is processed in the ME-SFI control unit:

• Intake air temperature (charge air temperature in supercharged engines)
• Engine speed/crankshaft position/ignition circuit detection
• Throttle valve position
• Air mass (boost pressure in supercharged engines).

	Motor electronics control unit, location/task/ design/function	other than engine 111 EVO	GF07.61-P-5000F
		Engine 111 EVO	GF07.61-P-5000GS
	Intake air temperature sensor, location/task/ design/function		GF07.04-P-2100F
	Crankshaft position sensor, location/task/ design/function		GF07.04-P-4116F
	Electronic accelerator/cruise control/idle speed control actuator location/task/design/function		GF30.22-P-4010F
	Throttle valve actuator, location/task/design/ function	Engine 111 EVO	GF30.22-P-4101GS
	Hot film mass air flow sensor, location/task/ design/function	Engine 104, 112, 113, 137 Engine 111 (except engine 111 EVO)	GF07.07-P-4118G
		Engine 111 EVO	GF07.07-P-4118GS
		Engine 119, 120 (round connector)	GF07.07-P-4118E
	ME-SFI synchronizing fuel injection and firing order function		GF07.61-P-4009F
	ME-SFI ignition system function	other than engine 111 EVO	GF15.12-P-0001F
		Engine 111 EVO	GF15.12-P-0001GS
	ECI ignition system function	Engine 137	GF15.15-P-3000L