C 3500 Truck 2WD V8-6.0L VIN U (2001)
Crankshaft Position Sensor: Description and Operation
CRANKSHAFT POSITION SENSOR AND RELUCTOR WHEEL
The Crankshaft Position (CKP) sensor is a magneto resistive type sensor. The CKP sensor works in conjunction with a 24X reluctor wheel. The reluctor
wheel is mounted on the rear of the crankshaft. The 24X reluctor wheel uses 2 different width notches that are 15 degrees apart. This pulse width
encoded pattern allows cylinder position identification within 90 degrees of crankshaft rotation. In some cases identification can be achieved within 45
degrees of crankshaft rotation. The reluctor wheel also has dual track notches that are 180 degrees out of phase. This design allows for quicker starts
and accuracy. The CKP sensor also outputs a 4X signal for spark control, for misfire diagnosis, for tachometer output, and for fuel control. All CKP
signals are output as a digital square waveform.
