1996-2005 Suzuki DF40, DF50 Four Stroke Outboard Service Manual, Page 99Get this manual
ENGINE CONTROL SYSTEM 3-44
CHART9SELF-DIAGNOSTIC CODE "1-1"
Individual checkCheck rectifierregulator resistance[NOTE1] Is result OK? (See page 4-3 YESEngine runningCheck "B5" terminal voltage at idle speed(See page 3-34 Is result 16 or over? NO Possible causeECM failure Wire continuityconnection failure YES NO Rectifierregulator failure