DISTRIBUTORLESS Ignition System: 2.4L

A Distributorless Ignition System (DIS) is used to provide ignition spark and ignition timing. DIS is controlled by Powertrain Control Module (PCM). Ignition timing is controlled by PCM and is nonadjustable. DIS consists of camshaft position sensor, crankshaft position sensor, ignition coil, spark plug wires and spark plugs.

Ignition coil receives voltage from Auto Shutdown (ASD) relay. For operation of ASD relay, see AUTO SHUTDOWN (ASD) RELAY  in RELAYS under MISCELLANEOUS CONTROLS. PCM controls the ground circuit for energizing the ignition coil. During cranking, the PCM advances ignition timing a specified amount.

When engine starts, the PCM uses input signal from camshaft position sensor, crankshaft position sensor, engine coolant temperature sensor, intake air temperature sensor, knock sensor, MAP sensor and throttle position sensor for controlling ignition system and ignition timing. For operation of camshaft position sensor, crankshaft position sensor, engine coolant temperature sensor, intake air temperature sensor, knock sensor, MAP sensor and throttle position sensor, see INPUT DEVICES  under COMPUTERIZED ENGINE CONTROLS.