Yamaha F150B Service Manual

Also see for F150B: Owner's manual Service manual Owner's manual

2-4Electronic control system012345678910ASensor, switch and actuatorEngine ECMCalculates the command values, and controls the fuel injection,ignition timing, and the engine speed based on the signals sent byeach sensors.Pulser coilFor detecting the engine speed.For detecting the crankshaft angle and the position of the pistons.For identifying each group of cylinders (#1 and #4, #2 and #3).For utilizing the detected signals to controlling the fuel injection,ignition timing, and the engine speed.TPS To detect the throttle valve opening.Air pressure sensor To detect the intake air pressure for controlling the ignition timingand the fuel injection amount.Air temperature sensor To detect the intake temperature for compensating the ignition tim-ing.Engine temperature sensor Compensate the ignition timing and the fuel injection amount.Oil pressure sensor To detect the oil pressure and apply it to the alert of low oil pres-sure and the engine speed control.ThermoswitchIn case of overheat, the thermoswitch is turned on. Once it isturned on, the engine ECM activates the engine speed controland the alert buzzer goes off.Neutral switch Detects the neutral position.Engine shut-off switch Activates the engine stop function compulsorily.Fuel injector Gives optimal amount of fuel at the optimal timing according to theengine ECM command signals.Ignition coil Activates the ignition at the optimal timing based on the signalsfrom engine ECM.High-pressure fuel pump Pressurizes the fuel in the vapor separator, and delivers the fuel tothe fuel rails.Shift cut switch To identify shift-in or shift-out condition for the forward gearshift.ISC valve To adjust the amount of intake air into the engine at idle.YDISAllows quick, precise and detailed diagnosis by reading out thediagnosis codes and/or by performing the active test, after con-necting the personal computer installed with the valid software.