Camshaft Position Sensor (3.3L & 3.8L)
Camshaft Position (CMP) sensor is located on top of timing chain cover, just below thermostat housing. See Fig 1 . End of CMP sensor is located directly above camshaft sprocket. A notched ring is mounted on front of camshaft sprocket.
As camshaft rotates, CMP sensor generates pulses due to notch areas on the notched ring. When solid metal area on notched ring passes below CMP sensor, voltage decreases to less than .5 volt. When notch on notched ring aligns with bottom of CMP sensor, voltage increases to 5 volts. Switching of the voltage generates pulses. These pulses provide an input signal to Powertrain Control Module (PCM). PCM uses input signal along with Crankshaft Position (CKP) sensor input signal for determining fuel injection synchronization and cylinder identification.