Civic L4-1493cc 1.5L SOHC (VTEC) (1993)
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Main Relay (Computer/Fuel System): Description and Operation
The PGM-PI main relay actually contains two individual relays.
The relay is located at the left side of the cowl.
One relay is energized whenever the ignition is on which supplies the battery voltage to the ECM, power to the fuel injectors, and power for the second
relay.
The second relay is energized for 2 seconds when the ignition is switched on, and when the engine is running which supplies power to the fuel pump.
