Liberty Limited Edition 2WD V6-3.7L VIN K (2002)
Camshaft Position Sensor: Description and Operation
Fig.6 Camshaft Position Sensor - 3.7L
The Camshaft Position Sensor (CMP) on this engine is bolted to the right-front side of the right cylinder head.
Fig.8 Camshaft Position Sensor Location - 3.7L
The Camshaft Position Sensor (CMP) sensor contains a hall effect device referred to as a sync signal generator. A rotating target wheel (tonewheel) for
the CMP is located at the front of the camshaft for the right cylinder head. This sync signal generator detects notches located on a tonewheel. As the
tonewheel rotates, the notches pass through the sync signal generator. The signal from the CMP sensor is used in conjunction with the Crankshaft
Position Sensor (CKP) to differentiate between fuel injection and spark events. It is also used to synchronize the fuel injectors with their respective
cylinders.
When the leading edge of the tonewheel notch enters the tip of the CMP, the interruption of magnetic field causes the voltage to switch high, resulting in
a sync signal of approximately 5 volts.
