2009 Yamaha F40 Outboard Service Manual, Page 38Get this manual
TECH FEA
Technical features and description Adjusts the ignition timing according to the engine operating conditionsSee "Ignition timing control" (2-6)Adjusts the injecting timing and volume according to the engine operating conditionsSee "Fuel injection control" (2-7)During idle, the engine ECM controls the ISC valve opening by adjusting the stepping motor positions in order to achieve the target idle speedWhen reducing speed, the control system closes the ISC valve, and also initializes the valve position by returning it to the fully closed position when the engine start switch is turned to "OFF Keeps the high-pressure fuel pump in operation for seconds after the engine start switch is turned to "ON" and during engine operationPerforms duty controls of the vapor shut-off valve between the fully open and the fully closed positions to decide the engine intake volume of fuel evaporation gas depending on the engine operating conditionsAs the engine speed increases, intake volume of fuel evaporation gas increasesOn the contrary, the valve closes at engine start6 pulses of digital and analog outputs per crankshaft revolutionThe buzzer comes on when overheat or low oil pressure is detected, when the engine is cranked while the engine shutoff switch is "ON," or when the gear is shifted to the position with the engine start switch "ON" and the water detected in the fuel filterThe alert indicator will turn on when overheat is detected or oil pressure gets too lowThe check engine indicator will come on through the failure diagnosis control system when the Command Link Multifunction Meter is equippedThe following information will be available by connecting to the YDIS: current diagnosis code, past diagnosis records, current engine operation status, past engine operation status, actuator test, and running hoursCommand Link Multifunction Meter See "Digital network system" (2-11)Turns the main relay on and off