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Home >> Cadillac >> 1999 >> Seville STS V8-4.6L VIN 9 >> Repair and Diagnosis >> Powertrain Management >> Ignition System >> Description and Operation >> Ignition Control System
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Ignition Control System

Description:




The Ignition Control System for this Powertrain controls fuel combustion by providing a spark to ignite the compressed air/fuel mixture in each cylinder at the correct time. The ignition control system has several advantages over a mechanical distributor ignition system.
^ No moving parts to wear out.
^ No mechanical load on the engine.
^ Elimination to mechanical timing adjustments.
^ Located for easier service and improved reliability.
^ Improved high engine speed performance.

The Ignition Control System consists of the following components:
^ Two crankshaft position sensors (A and B).
^ Crankshaft reluctor ring.
^ Camshaft position sensor.
^ Ignition control module.
^ 4 separate ignition coils.
^ Eight spark plug wires and conduit.
^ Eight spark plugs.
^ Knock sensor.
^ Powertrain Control Module (PCM).