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Home >> GMC >> 1982 >> S15 Pickup 1.9L Eng VIN A, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Ignition System >> NIPPONDENSO Electronic Ignition System >> Description

NIPPONDENSO Electronic Ignition System: Description

Two variations of electronic ignition are used with the 1.9L 4-cylinder engine, both making use of a Nippondenso distributor.

California models feature a computer, in addition to other ignition components. The computer is a part of the computerized engine control system. See Fig 1.

Fig 1: Wiring Diagram Of Nippondenso California System
G09360875Courtesy of GENERAL MOTORS COMPANY

California models have computerized engine control. 

Federal models incorporate an engine speed sensor into the system, but have no computer. See Fig 2.

Fig 2: Wiring Diagram Of Nippondenso Federal System
G09360876Courtesy of GENERAL MOTORS COMPANY

Federal models have no computer. 

The distributor has both vacuum and centrifugal advance mechanisms. It also houses a reluctor, stator, magnet set, and a pick-up coil and control module assembly. See Fig 3 and Figure. The system makes use of a conventional ignition coil with positive, negative, and secondary terminals.

Fig 3: Distributor Breaker Plate Assembly
G09360877Courtesy of GENERAL MOTORS COMPANY

Note stator-to-pick-up coil and module relationship.