Overheating/pinging protection, function - GF07.61-P-4027CY

ENGINE 272.947 in MODEL 204.0/2 up to Model Year 2008 

The overheating/knock protection protects against engine damage and overheating damage of catalytic converters for a thermal overload.

The level of heat output by the cooling system is mainly dependent on the fan speed, vehicle speed, outside temperature and coolant temperature.

To avoid exceeding the maximum permissible coolant temperature, the heat generated by combustion and supplied to the cooling system and thus the engine output must be restricted.

Here the throttle valve is no longer fully opened by the ME-SFI [ME] control unit (N3/10). The fuel injection quantity is reduced according to the lower air mass.

	Electrical function diagram for overheating/knock sensor function		PE07.61-P-2777-99FAB
	Component description for fuel injection valves	Y62/1-Y62/6	GF07.03-P-6010CY
	Component description for the coolant temperature sensor	B11/4	GF07.04-P-6043CY
	Component description for the intake manifold pressure sensor	B28	GF07.04-P-6062CY
	Component description for the crankshaft Hall sensor	B70	GF07.04-P-6221CY
	Component description for the hot film mass air flow sensor	B2/5, B2/5b1	GF07.07-P-6000CY
	Component description for the ME-SFI [ME] control unit	N3/10	GF07.61-P-6000CY
	Component description for the coolant thermostat	Y110	GF20.10-P-3162CY
	Component description for the accelerator pedal sensor	B37	GF30.20-P-2011CY
	Component description for the throttle valve actuator	M16/6	GF30.20-P-2021CY