Civic GX Sedan L4-1.6L CNG (1998)
Main Relay (Computer/Fuel System): Description and Operation
PGM-FI Main Relay
Description
The PGM-FI main relay actually contains two individual relays. This relay is located at the right side of the cowl. One relay is energized whenever the
ignition is on which supplies the battery voltage to the PCM, power to the fuel injectors, and power for the second relay. The second relay is energized
for two seconds when the ignition is switched ON (II), and when the engine is running, to supply power to the fuel injector relay, fuel pressure regulator
shut-off solenoid valve and fuel tank internal solenoid valve.