Segway VILLIAN SSV Series Service Manual page 312

ELECTRICAL SYSTEM
STARTING RELAY......................................................................................................................14-36
Disassemble...............................................................................................................................14-36
Start relay troubleshooting...........................................................................................................14-36
START MOTOR...............................................................................................................................14-37
Disassemble.................................................................................................................................14-37
installation.....................................................................................................................................14-37
ECU....................................................................................................................................................14-38
Disassemble the ECU............................................................................................................14-38
Install ECU...............................................................................................................................14-38
ECU connector removal skills.......................................................................................................14-38
FUEL PUMP ASSEMBLY....................................................................................................................14-39
Disassemble...............................................................................................................................14-39
Fuel pump assembly inspection...........................................................................................14-40
fuel pump assembly......................................................................................................................14-41
TRAILER POWER SOCKET.............................................................................................................14-42
Remove trailer power socket.........................................................................................................14-42
Install trailer power socket.............................................................................................................14-42
EFI SYSTEM.......................................................................................................................................14-43
Schematic diagram of EFI system.................................................................................................14-43
COOLANT TEMPERATURE SENSOR...........................................................................................14-44
Function Description.....................................................................................................................14-44
working principle...........................................................................................................................14-44
Performance parameter..............................................................................................................14-45
Fault diagnosis...........................................................................................................................14-45
OXYGEN SENSOR ..........................................................................................................................14-46
Function introduction....................................................................................................................14-46
Working principle..........................................................................................................................14-46
Performance parameter................................................................................................................14-47
Electrical characteristic parameter...............................................................................................14-47
Electrical characteristics..............................................................................................................14-48
ELECTRONIC CONTROL UNIT（ECU）..........................................................................................14-49
Function Description..................................................................................................................14-49
Electrical characteristics...............................................................................................................14-50
Fault diagnosis..............................................................................................................................14-50
ECU pin defi nition.........................................................................................................................14-51
FUEL INJECTOR...............................................................................................................................14-53
working principle...........................................................................................................................14-53
Performance parameter................................................................................................................14-54
Fault diagnosis..............................................................................................................................14-54
IGNITION COILS...............................................................................................................................14-55
Working principle.........................................................................................................................14-55
Performance parameters.............................................................................................................14-56
Fault diagnosis.............................................................................................................................14-56
SPARK PLUG ..................................................................................................................................14-57
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