Rio L4-1.5L (2001)
Oil Pressure Warning Lamp/Indicator: Description and Operation
Engine oil pressure warning
"OIL" warning lamp illuminates whenever oil pressure is low with engine on. A sending unit in engine block changes resistance with oil pressure. Lamp
illuminates for several seconds after starting engine and goes off when normal oil pressure is reached.
Circuit Operation
Low Oil Pressure Indicator
With the ignition switch in "ON" position, battery voltage is applied to the low oil pressure indicator in the instrument cluster through the "METER (10
A)" fuse and the wire "Y". The indicator is grounded through the oil pressure switch whenever the oil pressure is below 0.7 - 2.6 kg/sq.cm at 1000 rpm.
The bulb illuminates to warn the driver.
