PR25DD engine

SYSTEM DIAGRAM

Courtesy of NISSAN NORTH AMERICA, INC.

Component parts	Function
Engine oil pressure sensor	Refer to Engine Oil Pressure Sensor .
Crankshaft position sensor	Refer to Crankshaft Position Sensor .
Engine temperature sensor	Refer to Engine Oil Temperature Sensor .
ECM	Refer to ECM .
Combination meter	It receives the engine oil pressure waning lamp signal from ECM via CAN communication.
Fuel injector	Refer to Fuel Injector .

INPUT/OUTPUT SIGNAL CHART

Sensor	Input signal to ECM	ECM function	Actuator
Engine oil pressure sensor	Engine pressure	Engine protection control Oil pressure warning lamp signal FUel cut control	Combination meter Oil pressure warning lamp
Crankshaft position sensor	Engine speed
Engine oil temperature sensor	Engine oil temperature

SYSTEM DESCRIPTION

The engine protection control at low engine oil pressure warns the driver of a decrease in engine oil pressure by the oil pressure warning lamp a before the engine becomes dama deg.

When detecting a decrease in engine oil pressure at an engine speed less than 1, 000 rpm, ECM transmits an oil pressure warning lamp signal to the combination meter. The combination meter turns ON the oil pressure warning lamp, according to the signal.

Decrease in engine oil pressure	Engine speed	Combination meter	Fuel cut
		Oil pressure warning lamp
Detection	Less than 1, 000 rpm	ON*	NO
	1, 000 rpm or more	ON	YES

*: When detecting a normal engine oil pressure, ECM turns OFF the oil pressure warning lamp.