RDX L4-2.3L Turbo (2008)
Main Relay (Computer/Fuel System): Description and Operation
PGM-FI Main Relay 1 and 2
PGM-FI main relay 1 is energized whenever the ignition switch is ON (II) to supply battery voltage to the PCM, power to the injectors, and power for
PGM-FI main relay 2 (FUEL PUMP). PGM-FI main relay 2 (FUEL PUMP) is energized to supply power to the fuel pump (fuel pump control module)
for 2 seconds when the ignition switch is turned ON (II), and when the engine is cranking or running.
