Colt Vista AWD 1992 Crankshaft Position Sensor Component Diagrams
Crankshaft Position Sensor: Description and Operation
Distributor Exploded View
SENSOR OPERATION
The Crank Angle Sensor and the Top Dead Center Sensor are located within the distributor housing. These sensors are incorporated into one unit
being a disc and a pick-up module. The disc is affixed to the distributor shaft and the light-transmitting module is mounted stationary to the
distributor housing.
Crank Angle And #1 TDC Sensor
The disc contains 4 large slits around its circumference to indicate the crankshaft angle. An additional light-transmission slit located inward from
the edge is used to indicate number one cylinder's top dead center position.
The pick-up module assembly uses two luminous diodes and two photo diodes in order to detect the two different slits. There is a very slight
clearance between the luminous diodes and the photo diodes and the disc rotates within this space.
As the distributor shaft rotates the slits at the discs edge pass between the light and the optical reading part of the module. The light emitted from
the luminous diodes pass through the slits to the photo sensing diodes. When the photo diodes receive the light they become conductive and
generate a signal which is sent to the Control Module.
