Stratus L4-2.4L VIN X (1998)
Crankshaft Position Sensor: Description and Operation
Fig 8 Timing Reference Notches
Fig. 6 Timing Reference Notches
Fig 9 Crankshaft Position Sensor
OPERATION
The PCM determines what cylinder to fire from the crankshaft position sensor input and the camshaft position sensor input. The second crankshaft
counter-weight has machined into it two sets of four timing reference notches including a 60° signature notch Fig. 6. From the crankshaft position
sensor input the PCM determines engine speed and crankshaft angle (position).
The notches generate pulses from high to low in the crankshaft position sensor output voltage. When a metal portion of the counterweight aligns
with the crankshaft position sensor, the sensor output voltage goes low (less than 0.5 volts). When a notch aligns with the sensor, voltage goes
high (5.0 volts). As a group of notches pass under the sensor, the output voltage switches from low (metal) to high (notch) then back to low.