5
Electrical system
Electrical component and wire harness routing ............. 5-1
Port............................................................................................. 5-1
Starboard ................................................................................... 5-3
Rear............................................................................................ 5-5
Front........................................................................................... 5-7
Top ............................................................................................. 5-8
Fuse holder (Electrical management box)................................ 5-10
Bottom cowling ........................................................................ 5-11
ECM circuit diagram ........................................................ 5-12
ECM coupler layout.......................................................... 5-15
Checking the electrical component ............................... 5-18
Using the YDIS ......................................................................... 5-18
Using the digital tester ............................................................. 5-18
Engine control unit and component ............................... 5-19
Checking the main relay........................................................... 5-19
Checking the engine ECM circuit............................................. 5-19
Checking the electrical management box................................ 5-20
Checking the ETV and TPS...................................................... 5-21
Checking the ETV motor relay.................................................. 5-22
Checking the SPS .................................................................... 5-22
Checking the shift actuator relay ............................................. 5-23
Checking the shift actuator ...................................................... 5-23
Checking the cam position sensor........................................... 5-23
Checking the OCV.................................................................... 5-25
Checking the oil pressure sensor............................................. 5-26
Checking the water pressure sensor ....................................... 5-26
Fuel control unit and component ................................... 5-28
Checking the injector driver circuit .......................................... 5-28
Checking the water detection switch....................................... 5-28
Checking the fuel injector......................................................... 5-29
Checking the low-pressure fuel pump and high-pressure
fuel pump ................................................................................. 5-29
Checking the direct injection pump ......................................... 5-30
Checking the low-pressure fuel pump relay ............................ 5-31
Checking the high-pressure fuel pump relay ........................... 5-31
Checking the fuel pressure sensor........................................... 5-32
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