Ignition System: Description and Operation

CONFIGURATION
The ignition system is:
- An Electronic Distributorless Ignition System (EDIS) controlled by an Electronic Engine Control (EEC) integrated into the Powertrain Control Module (PCM).

COMPONENTS
The ignition system consists of the:
- Crankshaft Position (CKP) sensor.
- Ignition coil.
- Spark plug wires.
- Spark plugs.

DESCRIPTION





The crankshaft position sensor:
- Is a variable reluctance sensor.
- Senses a missing tooth on crankshaft gear.
- Generates a CKP signal which is sent to the PCM. The PCM counts this signal for engine RPM.





The ignition coil:
- Changes low voltage pulses from the PCM to high voltage pulses.
- Sends high voltage pulses to spark plugs through spark plug wires.
- Has two transformers.





The spark plug wire carries high voltage pulses from the ignition coil to the spark plug.





The spark plug:
- Changes high voltage pulses to sparks at gap which ignites fuel and air mixture.
- Originally equipment on the vehicle is a platinum enhanced active electrode for long life. The active electrode is different for LH and RH spark plugs.

- On the RH side (cylinders 1, 2, 3, and 4) are type AWSF-32PG.

- On the LH side (cylinders 5, 6, 7 and 8) are type AWSF-32P.

NOTE: The replacement spark plugs are AWSF-32PP; both electrodes are platinum enhanced so it can replace either a RH or LH spark plug.