1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 381Get this manual
13-45 DF40DF50 "K1" (01) model
CHART12ENGINE CRANKED, BUT NOT START (OR STOPS SHORTLY AFTER STARTING)
Before starting this troubleshooting, make sure thatThere is no self-diagnostic code indication Emergency stop switch plate is set in placeSTART
Ignition switch "ON"Check "30" terminal voltageIs result OK? (See page 13-34CrankingCheck injector operating soundIs result OK? (See page 13-36 NOIgnition switch "OFF"Check fuel injector resistanceIs result OK? (See page 13-35 YESIgnition switch "ON"Check "40, 39 and 38" terminal voltageIs result OK? (See page 13-34 YESCrankingCheck fuel injector operating signalIs result OK? (See page 13-36 YES Fuel injector failureIgnition switch "ON"Check "37" terminal voltage for secafter switch ONIs result OK? (See page 13-34 Possible causeFailure of high pressure fuel system componentsNO YES NO NO YES ECM main relay failureIgnition switch "ON"Check "2" terminal voltage Is result OK? (See page 13-34 YES YESCrankingCheck ignition spark using timing light(Pno09930-76420)Is there light flashing? NO NO Emergency stop switch failure