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Home >> Volkswagen >> 1985 >> Quantum L4-1781cc 1.8L SOHC >> Repair and Diagnosis >> Powertrain Management >> Ignition System >> Description and Operation >> System Description >> Digifant II Ignition System
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Digifant II Ignition System


The DIGIFANT II ignition system is functionally identical to the TCI-H system used on earlier models. The difference in this system lies in that all ignition functions including knock control are handled by the injection control unit.
Ignition timing is based on:
Engine load
Engine speed
Ignition quality (knock sensor signal)
Coolant temperature