Electronic Ignition System

Ignition system consists of a distributor, which uses a signal generator (signal rotor and pick-up coil/Camshaft Position (CMP) sensor) to produce ignition pulses through the externally mounted ignitor. Ignitor is mounted on right side of firewall in engine compartment.

Power for ignition coil and ignitor is provided through 15 amp IG-COIL METER fuse, located in fuse block below left side of steering column. Fuse receives power when ignition is turned on. Ground circuit for ignition coil is regulated by the ECM.

As rotating signal rotor passes pole piece of pick-up coil/CMP sensor, a reference signal is sent to ECM, which uses this signal to determine when to signal ignitor to open ground circuit for primary ignition.

When ignitor opens ground circuit for primary ignition, magnetic field around ignition coil windings collapses, producing an induced high voltage surge used to operate the spark plugs.