Engine Ignition

ENGINE IGNITION

Coil Terminal-to-Cylinder Relationship:

The ignition system consists of the:
- crankshaft position (CKP) sensor.
- ignition coil.
- spark plug wires.
- spark plugs.

The CKP sensor:
- is a variable reluctance sensor.
- is mounted on the engine front cover.
- is triggered by a 36-minus-1 tooth trigger wheel located on the crankshaft damper pulse ring.
- provides ignition timing and crankshaft speed (rpm) to the PCM.

The ignition coil:
- changes low-voltage pulses from the PCM to high-voltage pulses.
- fires 2 spark plugs simultaneously.
- has 3 transformers.
- One transformer fires the spark plugs for cylinders 1 and 5
- One transformer fires the spark plugs for cylinders 2 and 6
- One transformer fires the spark plugs for cylinders 3 and 4

Spark plug wires:
- carry high-voltage pulses from the ignition coil to the spark plugs.

The spark plugs:
- change high-voltage pulses to spark at the gap, which ignites the fuel and air mixture.

The firing order is 1-4-2-5-3-6.