Ignition Coils
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. The signal reconnects to the engine control module (ECM) so that diagnostics can be carried out.
Each ignition coil has an integrated power stage.
The ignition coils are in the sparkplug wells above each spark plug.
The control module checks the ignition coil's function using the two separate diagnostic leads.
Diagnostic lead 1 manages ignition coils B, C, E and H (corresponds to cylinders 2, 3, 5 and 8). Diagnostic lead 2 manages ignition coils A, D, F and G (corresponds to cylinders 1, 4, 6 and 7).