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

The main relay is located at the back of the fuse box on Integra models, or on the left side of the cowl on Legend models. The relay is actually two separate relays in one. One relay is energized whenever the ignition is On to supply battery voltage to the ECU and power to the injectors and the second relay. The second relay is energized for approximately two seconds after the ignition is activated to supply voltage to the fuel pump.