Sidekick Sport 2D JLX 4WD L4-1.8L (1998)
Camshaft Position Sensor: Description and Operation
The CMP sensor located on the rearward of cylinder head consists of the signal generator (photo transistors) and signal rotor (slits plate).
The signal generator generates Reference signal and Position signal through two types of slits in the slit plate which turns together with the
camshaft.
Reference signal
The CMP sensor generates 4 pulses of signals each of which has a different wave form while the camshaft makes one full rotation.
Based on these signals, ECM judges which cylinder piston is at the ignition BTDC 110°
Position signal
The CMP sensor generates 360 pulses of signals while the camshaft makes one full rotation (i.e., 1 pulse per 1° movement of the camshaft). Based
on these signals, ECM judges the size of Reference signal, the engine speed and piston position.