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