Corolla Wagon L4-107.5 1762cc 1.8L DOHC (7A-FE) (1993)
/Page-603001.png)
Igniter: Description and Operation
PURPOSE
The igniter electronically fires the ignition coil in response to the ECM signal. Computers generally produce low amperage signals as outputs,
much lower than necessary to fire the coil.
LOCATION
Mounted near the ignition coil.
CONSTRUCTION
The igniter consists of a power transistor and circuitry to provide a tachometer output.
OPERATION
The igniter is essentially an electronic relay. It receives a "trigger" from the ECM and responds by turning a higher amperage current to the
ignition coil on and off. Each time a spark is produced an ignition confirmation (IGF) signal is sent to the ECM.
