Main Relay (Computer/Fuel System): Description and Operation

Service Check Connector / Data Link Connector:

PURPOSE
Supplies the battery voltage to the ECM, power to the injectors, and power to the second relay.

LOCATION
Located behind the center console,

OPERATION
Contains two individual relays.

One relay is energized whenever the ignition is on, and it supplies the battery voltage to the ECM, power to the injectors, and power to the second relay.

The second relay is energized for 2 seconds when the ignition is switched on before starting, and when the engine is running, to supply power to the fuel pump.