Yamaha YP125R Service Manual

8
ELECTRICAL SYSTEM
IGNITION SYSTEM .........................................................................................8-1
CIRCUIT DIAGRAM ..................................................................................8-1
TROUBLESHOOTING ..............................................................................8-3
ELECTRIC STARTING SYSTEM....................................................................8-5
CIRCUIT DIAGRAM ..................................................................................8-5
STARTING CIRCUIT CUT-OFF SYSTEM OPERATION ..........................8-7
TROUBLESHOOTING ..............................................................................8-9
CHARGING SYSTEM....................................................................................8-11
CIRCUIT DIAGRAM ................................................................................8-11
TROUBLESHOOTING ............................................................................8-13
LIGHTING SYSTEM ......................................................................................8-15
CIRCUIT DIAGRAM ................................................................................8-15
TROUBLESHOOTING ............................................................................8-17
SIGNALING SYSTEM ...................................................................................8-19
CIRCUIT DIAGRAM ................................................................................8-19
TROUBLESHOOTING ............................................................................8-21
COOLING SYSTEM.......................................................................................8-27
CIRCUIT DIAGRAM ................................................................................8-27
TROUBLESHOOTING ............................................................................8-29
FUEL INJECTION SYSTEM..........................................................................8-31
CIRCUIT DIAGRAM ................................................................................8-31
ECU SELF-DIAGNOSTIC FUNCTION....................................................8-33
TROUBLESHOOTING METHOD............................................................8-34
DIAGNOSTIC MODE ..............................................................................8-34
TROUBLESHOOTING DETAILS ............................................................8-36
DIAGNOSTIC CODE TABLE ..................................................................8-54
FUEL PUMP SYSTEM...................................................................................8-57
CIRCUIT DIAGRAM ................................................................................8-57
TROUBLESHOOTING ............................................................................8-59
IMMOBILIZER SYSTEM................................................................................8-61
CIRCUIT DIAGRAM ................................................................................8-61
GENERAL INFORMATION .....................................................................8-63
PART REPLACEMENT AND KEY CODE REGISTRATION
REQUIREMENTS...................................................................................8-63
TROUBLESHOOTING ............................................................................8-67
SELF-DIAGNOSIS FAULT CODE INDICATION.....................................8-67

Yamaha YP125R Specifications

General

Engine Type	Liquid-cooled, 4-stroke, SOHC, 4-valve
Bore x Stroke	52.4 mm x 57.9 mm
Fuel System	Fuel Injection
Ignition System	TCI
Transmission	V-Belt Automatic
Front Suspension	Telescopic fork
Rear Suspension	Unit Swing
Front Brake	Hydraulic single disc, Ø267 mm
Starter System	Electric
Rear Tyre	140/70-14M/C 62P (Tubeless)