Fan control - function - GF07.61-P-3023SM

ENGINE 113.986 

ENGINE 113.987 

ENGINE 113.988 

ENGINE 113.989 

The ME control unit (N3/10) actuates indirectly the "engine and AC electric suction fan with integrated control" (M4/7) continuously. The fan specified speed is transmitted by the ME control unit via a pulse width modulated signal (PWM signal).

The duty cycle of the PWM signal lies between 10 and 90%.

Meaning:

10 % Electric suction fan "OFF"

20 % Electric suction fan "ON", minimum speed

90 % Electric suction fan "ON", maximum speed

The AAC [KLA] control and operating unit (N22) transmits the status of the automatic air conditioning unit to the ME-SFI [ME] control unit via the CAN data bus. The fan specified speed is dependent on this and on the coolant temperature.

The engine and AC electric suction fan with integrated control continues to run for up to 5 minutes when the ignition is "OFF" if the maximum specified value for the coolant temperature or the engine oil temperature is exceeded.

If the battery voltage drops excessively during this operation, engine-off running is suppressed.

	Crankshaft position sensor - component description	L5	GF07.04-P-6010SM
	Coolant temperature sensor - component description	B11/4	GF07.04-P-6040SM
	ME-SFI [ME] control unit - component description	N3/10	GF07.61-P-6000SM
	Oil sensor - component description	B40	GF18.40-P-2000SM