Yamaha F225F Service Manual page 162

ELEC
Electrical component ........................................................ 5-1
Port ............................................................................................ 5-1
Starboard ................................................................................... 5-2
Fuse holder ............................................................................... 5-3
Rear ........................................................................................... 5-5
Front .......................................................................................... 5-6
Top ............................................................................................ 5-7
Bottom cowling .......................................................................... 5-8
Wiring harness routing ..................................................... 5-9
Port ............................................................................................ 5-9
Starboard ................................................................................. 5-10
Rear ......................................................................................... 5-13
Front ........................................................................................ 5-14
Top .......................................................................................... 5-15
Bottom cowling ........................................................................ 5-16
Circuit diagram ................................................................ 5-17
ECM coupler layout ......................................................... 5-19
Checking the electrical component ............................... 5-21
Using the YDIS ........................................................................ 5-21
Measuring the peak voltage .................................................... 5-21
Using the digital tester ............................................................. 5-22
Engine control unit and component .............................. 5-22
Checking the main relay .......................................................... 5-22
Checking the engine ECM circuit ............................................ 5-23
Checking the ETV and TPS .................................................... 5-24
Checking the ETV motor relay ................................................ 5-25
Checking the ETV (TPS) circuit ............................................... 5-25
Checking the SPS ................................................................... 5-26
Checking the shift actuator relay ............................................. 5-27
Checking the shift actuator ...................................................... 5-27
Checking the SPS and shift actuator circuit ............................ 5-28
Checking the cam position sensor .......................................... 5-29
Checking the OCV ................................................................... 5-32
Checking the oil pressure sensor ............................................ 5-33
Fuel control unit and component .................................. 5-34
Checking the water detection switch ....................................... 5-34
Checking the fuel injector ........................................................ 5-35
Checking the low-pressure fuel pump and high-pressure
fuel pump ................................................................................. 5-37
Checking the high-pressure fuel pump relay ........................... 5-38
Electrical system 5