Electrical System - Yamaha F30B 2018 Service Manual

Electrical component and wire harness routing ............. 5-1
Port............................................................................................. 5-1
Starboard.................................................................................... 5-3
Front ........................................................................................... 5-5
Rear............................................................................................ 5-6
Top ............................................................................................. 5-7
Bottom cowling (tiller handle model) .......................................... 5-8
Bottom cowling (remote control model)...................................... 5-9
Tiller handle (tiller handle model) ............................................. 5-11
ECM circuit diagram ........................................................ 5-13
ECM coupler layout.......................................................... 5-15
Checking the electrical component................................ 5-16
Using the YDIS......................................................................... 5-16
Measuring the peak voltage ..................................................... 5-16
Using the digital tester.............................................................. 5-17
Engine control unit and component............................... 5-17
Checking the main relay........................................................... 5-17
Checking the engine ECM circuit ............................................. 5-18
Checking the TPS .................................................................... 5-19
Checking the ISC valve ............................................................ 5-20
Checking the oil pressure switch.............................................. 5-20
Checking the alert indicator (tiller handle model) ..................... 5-21
Checking the alert buzzer......................................................... 5-22
Checking the trolling switch (tiller handle model) ..................... 5-22
Fuel control unit and component ................................... 5-22
Checking the water detection switch ........................................ 5-22
Checking the fuel injector ......................................................... 5-23
Checking the high-pressure fuel pump..................................... 5-24
Checking the vapor shut-off valve ............................................ 5-25
Charging unit and component ........................................ 5-26
Checking the lighting coil (stator assembly) ............................. 5-26
Checking the rectifier/regulator ................................................ 5-27

Electrical system