Camry Wagon L4-2.0L (3S-FE) (1990)
Igniter: Description and Operation
Ignition System
The igniter, located near left strut tower, is an electronic switching device used by the ECU to control coil firing. When the ECU has calculated optimum
timing, it signals the igniter to interrupt current flow in the coil primary windings, inducing high voltage from the coil secondary windings. By
controlling igniter switching, the ECU regulates ignition timing based on inputs received from various sensors.