Camshaft Position Sensor: Description and Operation

Sync Signal Generator And Pulse Ring:

Sync Signal Generator Operation:

The Sync Pulse Generator works in conjunction with the Crankshaft Position Sensor (CPS) to provide the Electronic Control Unit (ECU) with engine speed and firing order information. The pulse ring and sync pulse generator are located in the distributor housing. As the leading edge of the pulse ring rotates past the pulse generator a change in the magnetic field is monitored by the ECU. This indicates the position of piston number one. When the distributor shaft has continued rotating for 180° the trailing edge of the pulse ring passes the sync generator indicating to the ECU the position of piston number six.