Ignition System - MITSUBISHI: Operation

When ignition is on, ignition coil primary circuit is energized. As distributor shaft rotates, the reluctor rotates inside the stator assembly.

As armature teeth pass the pegs of the pick-up coil, a signal is sent to the ignitor. The ignitor then breaks the primary circuit in the coil. This causes a high voltage surge in the coil secondary circuit. This high voltage is required to fire the spark plugs.

Fig 1: Mitsubishi Electronic Ignition Sys W/Internal Ctrl Module

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

NOTE: For wiring schematic of Mitsubishi models with turbocharged engines and ECI, see the appropriate article in the COMPUTERIZED ENGINE CONTROLS section.