After the safe start module is complete, what occurs in a direct spark ignition system?

In a direct spark ignition (DSI) system, once the safe start module finishes its checks, the gas valve and spark ignition are activated simultaneously to ignite the gas. This process occurs to ensure that the ignition happens safely and efficiently after confirming that conditions are suitable for operation, which is a critical safety feature.

Once the safe start module verifies that everything is in order, it allows for gas and spark to be released. This combination is necessary to successfully ignite the fuel in the combustion chamber. The ignition must occur almost instantaneously to avoid unburned gas accumulating, which could be hazardous.

The other outcomes described in the question—turning the spark off, placing the system in standby, or activating the blower motor—do not accurately represent the operation of a DSI system right after the safe start module is complete. Turning off the spark would prevent ignition, while going into standby means the system is inactive and ready but not yet engaged. Similarly, activating the blower motor usually precedes ignition in order to establish proper airflow, not directly following the safe start checks.