Crankshaft Position Sensor (2.4L)
Crankshaft Position (CKP) sensor is located on cylinder block, behind generator, near oil filter. See Fig 1 . Crankshaft contains a crankshaft pulse ring which contains 2 sets of notches ground into the No. 2 counterweight.
As crankshaft rotates, CKP sensor generates pulses due to notch areas on the No. 2 counterweight. When solid area on crankshaft pulse ring aligns with bottom of CKP sensor, voltage decreases to less than .3 volt.
When notch area on crankshaft ring aligns with bottom of CKP sensor, voltage increases to 5 volts. Switching of the voltage generates pulses. These pulses provide an input signal to the Powertrain Control Module (PCM). PCM uses input signal to determine crankshaft position. PCM uses input signal along with other various input signals for controlling fuel injection synchronization and ignition system.