Passport 4WD V6-3.2L SOHC (6VD1) (1994)
Crankshaft Position Sensor: Description and Operation
Crankshaft Position Sensor
PURPOSE:
Crankshaft Position Sensor (CKP) sends information such as firing order and starting timing of each ignition coil, to Engine Control Module
(ECM). A notch in timing disc on crankshaft activates sensor.
OPERATION:
This sensor protrudes into the block, within approximately 0.050" of the engine crankshaft reluctor. The reluctor is a special wheel cast into the
crankshaft with seven slots cast into it, six of which are evenly spaced 60° apart. A seventh slot is spaced 10° from one of the other slots and serves
to generate a "sync pulse." As the reluctor rotates as part of the crankshaft, the slots change the magnetic field of the sensor, creating an induced
voltage pulse.
Based on the crank sensor pulses, the ignition module sends reference signals to the ECM which are used to indicate crankshaft position and
engine speed.