Computerized Engine Control - Digital Timing Control: Description

A Bosch-Hitachi digital timing control system, called Hartig Electronic Ignition, provides timing functions. There is neither a centrifugal advance nor a vacuum advance/retard mechanism.

Instead, the system uses a Bosch Hall Effect distributor and ignition coil and a Hitachi fuel/timing control unit. Engine operating conditions are monitored by various sensors.

A single control unit is used to control the operation of both the ignition system and the oxygen sensor system. However, a second control unit is used to turn the ignition coil on and off.