Yamaha F150B Service Manual

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

ELECElectrical system 5Electrical components ............................................................. 5-1Port view .................................................................................... 5-1Junction box assembly .............................................................. 5-2Aft view ...................................................................................... 5-3Bow view ................................................................................... 5-4Top view .................................................................................... 5-5Wiring harness routing ............................................................ 5-6Port view .................................................................................... 5-6Junction box assembly .............................................................. 5-7Aft view ...................................................................................... 5-8Top view .................................................................................... 5-9Bottom cowling ........................................................................ 5-10Circuit diagram ........................................................................ 5-11ECM coupler layout ................................................................ 5-12Checking the electrical component ................................... 5-13Checking by use of YDIS ........................................................ 5-13Measuring the peak voltage .................................................... 5-13Checking by use of the digital tester ....................................... 5-13Engine control units and components .............................. 5-14Checking the main relay .......................................................... 5-14Checking the engine ECM circuit ............................................ 5-15Checking the TPS ................................................................... 5-16Checking the ISC .................................................................... 5-17Checking the oil pressure sensor ............................................ 5-19Checking the hour meter ......................................................... 5-19Checking the water pressure sensor (option) .......................... 5-21Checking the speed sensor (option) ........................................ 5-22Fuel control units and components ................................... 5-23Checking the water detection switch ....................................... 5-23Checking the fuel injector ........................................................ 5-24Checking the high-pressure fuel pump .................................... 5-25Charging units and components ........................................ 5-26Checking the lighting coil (stator assembly) ............................ 5-26