Ignition Coil
The ignition coils supply the spark plugs with high voltage to produce sparks. The Engine Control Module (ECM) controls the ignition coils so that sparks are generated at the correct time.
Ignition coils are supplied with 12 V from the engine compartment relax/fusebox and grounded in the ground terminal intended for ignition coils; coils 1 and 2 together, 3 and 4 together.
The ignition coils are controlled by the control signal (5 V) from the Engine Control Module (ECM)
Each ignition coil has an integrated power stage.
The ignition coils are in the spark plug wells above each spark plug.
The Engine Control Module (ECM) can diagnose the ignition coils.