Segway SNARLER ATV 2021 Series Service Manual page 309

Exploded View.......................................................................................14-3
Technical parameters............................................................................14-6
Special tools.........................................................................................14-7
Battery .................................................................................................14-8
Remove the battery.............................................................................14-8
Turn off ignition switch..........................................................................14-8
Battery charging....................................................................................14-9
Charging condition check....................................................................14-11
Generator inspection..........................................................................14-12
Circuit diagram of charging system......................................................14-13
Voltage regulating rectifi er inspection...................................................14-14
Remove..........................................................................................14-14
EFI system .........................................................................................14-15
Schematic diagram of EFI system......................................................14-15
Temperature Sensor........................................................................14-16
Function introduction .....................................................................14-16
Working principle...........................................................................14-16
Performance parameter..................................................................14-17
Fault diagnosis..............................................................................14-17
Oxygen sensor ...................................................................................14-18
Function introduction........................................................................14-18
Working principle..............................................................................14-18
Performance parameter.....................................................................14-19
Electrical characteristic parameter......................................................14-19
Troubleshooting..............................................................................14-20
Electronic control unit （ ECU） ...............................................................14-21
Function introduction........................................................................14-21
Electrical characteristics.....................................................................14-21
Fault diagnosis..............................................................................14-21
ECU stitch definition........................................................................14-22
Fuel injector ....................................................................................14-23
Working principle...........................................................................14-23
Performance parameters..................................................................14-24
Fault diagnosis..............................................................................14-24
Ignition coils.......................................................................................14-25
Working principle
Performance parameters..................................................................14-26
Fault diagnosis..............................................................................14-26
Spark Plug .........................................................................................14-27
Remove and install spark plugs.........................................................14-27
Engine speed sensor...........................................................................14-28
Technical performance test...............................................................14-28
Fault diagnosis..................................................................................14-28
Oil Pressure Sensor .............................................................................14-29
Fault diagnosis........................................................................................14-29
Throttle valve body assembly ................................................................14-30
ELECTRICAL SYSTEM
..............................................................................14-25
14 - 1
ELECTRICAL SYSTEM