Electronic Spark Control System: Description: Sensors: Notes
The Electronic Spark Control Computer uses engine sensors to determine when to fire the spark plugs. There are 4 sensors used on 4 and 6 cylinder engines, 5 used on V8 engines. The sensors are; pick-up assembly (Hall Effect pick-up on 4 cylinder engines), coolant temperature switch, carburetor switch, vacuum transducer, and a detonation sensor (Calif. V8 engines only). Their functions are as follows:
NOTE:
Vehicles with Electronic Spark Combustion Computers use 8 sensors. In addition to those discussed below, an oxygen sensor, speed sensor and charge temperature switch are also used. See pins 13, 14, 15, and 16 in wiring diagram shown in Fig. 4.