Ignition Control Module: Description and Operation

Ignition System Circuit Diagram:

PURPOSE
This vehicle is equipped with a distributorless ignition system. Igniter is an ECU controlled switching device that activates the primary ignition coil circuit.

LOCATION
Right side inner fender.

OPERATION
The ECU determines ignition timing from various inputs and transmits a primary current OFF signal to the igniter to control ignition timing. The ECU calculates input from these devices to control ignition timing:
^ Crank angle sensor "Ne" signal
^ Crank angle sensor "G" signal
^ Ignition switch ("START" position)
^ Water thermosensor
^ Airflow meter
^ Throttle sensor
^ Neutral and clutch switches
^ Diagnosis connector (for base timing adjustment)