System Description

SYSTEM DIAGRAM 

Courtesy of NISSAN NORTH AMERICA, INC.

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 damaged.
• 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
  		Oil pressure warning lamp
  Detection	Less than 1, 000 RPM	ON*
  	1, 000 RPM or more	ON

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