Crankshaft Position (CKP) Sensor

On 2.0L engines, CKP sensor is located on rear side of cylinder head, coupled to intake camshaft. On 1.8L engines, CKP sensor is located inside distributor. CKP sensor provides ECM with engine speed and crankshaft angle position. CKP sensor consists of a metal disc and sensor unit.

Metal disc has 4 slits located 90 degrees apart, and 2 slits (one slit on 1.8L) located inward of the 4 slits, 180 degrees apart. On 2.0L engines, 2 inner slits are used by Top Dead Center (TDC) sensor to detect TDC of cylinders No. 1 and No. 4. On 1.8L engines, inner slit is used by TDC sensor to detect TDC of cylinder No. 1. On all engines, outer 4 slits are used by CKP sensor to detect crank angle.

On 2.0L engines, the disc is positioned on CKP sensor shaft and is turned with sensor shaft by intake camshaft. On 1.8L engines, the disc is fixed to distributor shaft and rotates as distributor turns. On all engines, CKP sensor has 2 Light-Emitting Diodes (LEDs) and 2 photo diodes to detect CPS slits and TDC sensor slits. The disc rotates between LEDs and photo diodes. Each time a slit comes between LED and photo diode pair, light emitted by LED passes through slit to photo diode.