Crank Angle Sensor

Computerized fuel injected systems use a tach (RPM) reference signal to determine when vehicle is running and when coil and/or injectors should be triggered. Crank angle sensor is incorporated within pick-up coil unit and is adjusted by same procedure as pick-up coil.

Fig 1: Identifying Ignition Coil Connector Terminals

Courtesy of GENERAL MOTORS CORP.

Fig 2: Checking Pick-Up Coil Resistance

Courtesy of GENERAL MOTORS CORP.