Pulsar L4-1597cc 1.6L SOHC (E16i) (1987)
/Page-492001.png)
Crankshaft Position Sensor: Description and Operation
CRANK ANGLE SENSOR
The crank angle sensor is a basic component of the entire E.C.C.S. It monitors engine speed and piston position, and sends to the E.C.U. some signals
on which the controls of fuel injection, ignition timing and other functions are based.
The crank angle sensor has a rotor plate and a wave forming circuit. The rotor plate has 360 slits for 1° signal (engine speed signal) and 4 slits for 180
° signal (crank angle signal). Light Emitting Diodes (L.E.D.) and Photo Diodes are built in the wave forming circuit.
When the rotor plate passes the space between the L.E.D. and the photo diode, the slits of the rotor plate continually cut the light which is sent to the
photo diode from the L.E.D. This causes generating rough-shaped pulses. They are then converted into on-off pulses by the wave forming circuit,
which are sent to the E.C.U.
