2009-2010 Suzuki DF70A DF80A DF90A Outboard Service Manual, Page 197Get this manual
Fuel System:
Fuel Injection System Troubleshooting
Before starting the troubleshooting, make sure that: There is no self-diagnostic code indication Emergency stop switch plate is set in placeStep Action Check fuel injector operating sound Check each injector for operating sound at engine cranking( (Page 1G-21)) Do all injector make operating sound? Check fuel injector resistance Turn ignition switch off, disconnect connectors from fuel injectors Check for proper connection to fuel injector at each terminal If good condition, check all fuel injector for resistance( (Page 1G-21)) Are all injectors in good condition? Check fuel injector power supply Measure voltage between each "Gray" wire terminal of fuel injector connector and engine body ground with ignition switch turned "ON"Is voltage 10 14 V? Check Wire circuitGo to step Turn "OFF" ignition switch Disconnect connector from ECM Measure resistance between each "OB", "BBr", "RW", "Lg" wire terminal of the fuel injector connector and body groundIs resistance infinity? Check Wire circuitGo to step Connect connector to ECM Measure voltage between each "OB", "BBr", "RW", "Lg" wire terminal of fuel injector connector and body ground with ignition switch turned "ON"Is voltage V? Check fuel injector operating signal Connect connectors to each fuel injector and ECM with ignition switch turned "OFF" Measure fuel injector operating signal between each "45", "71", "47", "59" terminal of ECM and body ground( (Page 1G-22)) Is voltage 10 or over?