Ignition System - NIPPONDENSO Electronic: Description
Nippondenso electronic ignition system includes a breakerless distributor, an ignitor, an ignition coil, and pick-up coil. Distributor consists of a housing, rotor, and cap. It contains a reluctor, breaker plate, and pick-up coil assembly. See Fig 1.
Some Toyota models have ignitor and ignition coil inside distributor. On other models, transistorized ignitor is mounted on ignition coil housing.
Both systems use a computer to control spark advance. All other distributor models contain conventional centrifugal and vacuum advance mechanisms.