Neon L4-2.0L VIN C (1998)
Crankshaft Position Sensor: Description and Operation
Fig 7 Crankshaft Position Sensor
Fig. 14 Timing Reference Notches
Fig.6 Timing Reference Notches
PURPOSE
The PCM determines what cylinder to fire from the crankshaft position sensor input and the camshaft position sensor input.
From the crankshaft position sensor input the PCM determines engine speed and crankshaft angle (position).
OPERATION
The second crankshaft counterweight has machined into it two sets of four timing reference notches including a 60° signature notch (Fig. 14).
The notches generate pulses from high to low in the crankshaft position sensor output voltage.