Ignition Control Module: Description and Operation

Location:

Two ignition control modules control firing of the spark plugs when triggered by the engine control module (ECM); the modules provide an interface between the ECM and the coil on plugs such that:

Ignition control module 1 drives bank 1 - coils 1 and 4, bank 2 - coils 2 and 3.
Ignition control module 2 drives bank 1 - coils 2 and 3, bank 2 - coils 1 and 4.

Ignition Coil - Coil On Plug:

Four separate ignition coils are mounted to each camshaft cover, directly above the spark plugs and are controlled by the ECM via the ignition control modules.

Each coil comprises an encapsulated step-up transformer and a direct push on connection to the spark plug.