Originally Posted by hrcs90
Honda's PGM-FI doesn't use OBD codes like the car world like you would expect, but a more Honda style. You can pull codes if needed through the RED DLC plug on the bike, by jumping the Brown and Green wires together or purchase Honda special tool "SCS connector". Make the connection and then turn the main switch on and count the MIL blinks.
The flywheel has notched or raised sections on the flywheel to determine crank position and thus injector or ignition timing.
The injector only needs to squirt every other revolution. It needs a cam sensor or fancy programing do do this.
This system is very close to a pre 0BD2 system but not as advanced. It is very simular to Dodges system they used on early 4 cylinder MPI cars.