2009 Yamaha F40 Outboard Service Manual, Page 80Get this manual
Function
Diagnosis Displays each part name, and the engine ECM trouble codes and status when the engine start switch is turned to "ON This allows you to quickly specify the malfunctioning partsThe trouble codes displayed are the same as those described in this chapterSee "Trouble code and checking step" (4-6) Diagnosis record Displays each part name and the engine ECM trouble codes that have been registeredThis allows you to check the outboard motor's record of malfunctionsThe trouble codes displayed are the same as those described in this chapterSee "Trouble code and checking step" (4-6) Engine monitor Each sensor status and the engine ECM data are displayed while the engine start switch is at "ON This enables you to find the malfunctioning parts quicklyIn addition, the data displayed using the Engine monitor function can be displayed in graphEngine speed Intake pressure (1) Atmospheric pressure Ignition timing Battery voltage
(1) Intake air pressure (2) Engine shut-off switch
TPS voltage Throttle valve opening ISC valve opening Fuel injection duration Water temperature