Engine Ignition (4V)

ENGINE IGNITION

The electronic ignition (EI) system consists of the following components:
- ignition-coil-on plug
- spark plug
- crankshaft position (CKP) sensor
- camshaft position (CMP) sensor

The crankshaft position (CKP) sensor:
- is a variable reluctance sensor.
- is mounted in the front cover.
- is triggered by a 36-minus-1 tooth trigger wheel located behind the front cover.
- provides base timing and crankshaft speed (rpm) to the powertrain control module (PCM).

The camshaft position (CMP) sensor:
- is a variable reluctance sensor.
- is mounted in the front cover.
- is triggered by the high point mark on the LH exhaust camshaft.
- provides camshaft rotational location information to the powertrain control module (PCM).