Circuit/System Description
The ignition system on this engine uses individual ignition coils and ignition control (IC) circuits for each cylinder. Ignition voltage is supplied to each bank of ignition coils. Each ignition coil, with its control circuit is connected to a separate ignition driver module within the engine control module (ECM). The ECM detects faults and controls the ignition system operation using this separate ignition driver module via an SPI bus circuit. The ignition driver module controls each coil using the IC circuits. The ignition driver module commands the IC circuit low when a spark event is requested. The ECM monitors the configuration of the ignition driver module and it ability to communicate with the ECM to determine if a fault exists.