Operation

- Turn ignition switch to "ON" position and battery positive Voltage will be applied to primary winding of ignition coil (incorporated into the distributor).
- When the crankshaft position sensor signal is input to engine control module, ON-OFF control of ignition power transistor is performed by engine control module.
- When ignition power transistor is turned on, current flows from the ignition coil (primary winding) to ground through the ignition power transistor.
- When the ignition power transistor is turned off, high Voltage is generated in the primary winding of ignition coil which induces even higher Voltage in the secondary winding, causing a spark at the spark plug(s).