Direct Ignition System

A Direct or Distributorless Ignition System (DIS), eliminates mechanical ignition components that can wear out. PCM has complete ignition control and uses a coil pack, CMP sensor and CKP sensor to control ignition timing. CMP sensor reads slots in cam timing sprocket. PCM uses this information along with information from CKP sensor to determine if fuel injectors and ignition coils are properly sequenced for correct cylinders.

Basic timing is determined by CKP sensor position and is not adjustable. One complete engine revolution may be required for PCM to determine crankshaft position during cranking.

Molded ignition coils are used. Each coil fires 2 paired spark plugs at the same time. One cylinder is on compression stroke and other cylinder is on exhaust stroke.