Crankshaft Position Sensor

The C(3)I (3.3L and 3.8L) crankshaft position sensor utilizes a Hall Effect switch mounted near vibration damper. The sensor monitors vibration damper position (crankshaft position) and sends a signal to ignition module. This signal indicates TDC position of each piston as well as supplying an engine speed (RPM) signal.

The 2.0L, 2.5L, 2.8L and 3.1L Direct Ignition System (DIS) and 2.3L Integrated Direct Ignition (IDI) system crankshaft position sensor protrudes into side of engine block, to within .05" (1.3 mm) of an internally-mounted crankshaft ring. The reluctor ring is a special trigger wheel cast into the crankshaft. As crankshaft rotates, 7 notches in the reluctor ring change the magnetic field at the tip of position sensor. This creates an induced AC voltage signal in the sensor windings, resulting in reference signals which are sent to ECM by ignition module. This allows ECM to compute crankshaft position and RPM, and fire appropriate ignition coil at the proper time.