Ignition System - Direct Ignition System (Dis): Description

The Direct Ignition System (DIS) is a distributorless system used on 2.0L (VIN 1), 2.5L, 2.8L and 3.1L equipped models. The 2.3L system is referred to as the Integrated Direct Ignition (IDI) system. The operation of both systems is quite similar to that of the C(3)I system. System consists of 2 or 3 ignition coils (4-cylinder or V6), spark plug wires, ignition module (located under coil pack), a crankshaft position sensor, necessary wiring and the Electronic Spark Timing (EST) portion of the Electronic Control Module (ECM). On 2.3L models, coils, module and spark plug connectors are all combined in one unit which plugs directly onto spark plugs.

This system utilizes the EST signal from the ECM to control spark timing. Ignition timing is controlled by the ECM using information from the following inputs: crankshaft position, engine RPM, engine temperature, engine load (manifold pressure or vacuum), air temperature and atmospheric pressure.