C 3500 Truck 2WD V8-8.1L VIN G (2001)
Crankshaft Position Sensor: Description and Operation
CRANKSHAFT POSITION SENSOR AND RELUCTOR WHEEL
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 this can be achieved within 45 degrees of
crankshaft rotation. The reluctor wheel also has dual track notches that are 80 degrees out of phase, this design allows for quicker starts and accuracy.
The CKP sensor also outputs a 4x signal for spark control, misfire diagnosis, tachometer output, and fuel control. All CKP signals are output as a digital
square waveform.
