Eighty-Eight Royale FWD V6-3.8L VIN K (1996)
The Hall-effect switch closest to the crankshaft, the CKP Sync portion of the sensor, produces a signal that approximates the inside interrupter
ring. The inside interrupter ring has 3 unevenly spaced blades and windows of different widths. The CKP Sync portion of the crankshaft position
sensor produces 3 different length ON - OFF pulses per crankshaft revolution. When a CKP Sync interrupter ring window is between the magnet
and inner switch, the magnetic field will cause the CKP Sync Hall effect switch to ground the CKP Sync signal voltage supplied from the ignition
control module. The CKP 18X interrupter ring and Hall-effect switch react similarly. The ignition control module interprets the CKP 18X and
CKP Sync ON - OFF signals as an indication of crankshaft position, and the ignition control module must have both signals to fire the correct
ignition coil.
The ignition control module determines crankshaft position for correct ignition coil sequencing by counting how many CKP 18X signal transitions
occur, i.e.; ON - OFF or OFF - ON, during a CKP Sync pulse.
