2004-2007 Honda Aquatrax ARX1200N3/T3/T3D Factory Service Manual, Page 216Get this manual
FUEL SYSTEM (Programmed Fuel Injection) DTC 12-1 (No1 INJECTOR) Before starting the troubleshooting, check the injector connector for loose contacts or corroded terminals, and recheck the DTCMIL 12 13 14 15 INJECTOR POWER INPUT LINE No1 Blackred No2 Blackred No3 Blackred No4 Blackred SIGNAL LINE Whitered Whiteblue Whitegreen Whiteblack
1Injector System Inspection Reset the diagnostic memory in the ECM (page 8-11)Start the engine and check the injector with the HDSIs the DTC 12-1 indicated? YES NO GO TO STEP Intermittent failure Loose or poorly connected injector connector