MITSUBISHI Electronic Ignition System: Description

Mitsubishi transistorized breakerless ignition consists of an electronic control module (ignitor), ignition coil and distributor. On some models, the control module was mounted with the ignition coil on the left fender apron. See Fig 1. On others, such as Chrysler Corp., Courier 2000 cc, and Mazda 626 and B2000 Pickup, the control module was mounted on the outside of the distributor housing. See Figure.

The GLC utilizes a dual timing ignition system to control spark timing. The system consists of two water thermo switches and a timer unit. See Figure. Within a 2 minute period after starting the engine, timing is retarded when the coolant temperature range is 50-122° F (10-50° C). Advance timing is 5° BTDC; retard timing is 1° BTDC. As the engine warms to normal operating temperature, timing will advance to 5° BTDC.

The Mazda 626 utilizes a water thermo valve to cut advance when the engine is cold. Federal B2000 Pickups use a vacuum delay valve during acceleration, and Calif. B2000 Pickups use both a water thermo valve and vacuum delay valve. On Calif. models, vacuum advance is cut when engine is cold and delayed during acceleration.