Electrical System - Yamaha WR450FB 2012 Owner's Service Manual

ELECTRICAL SYSTEM
IGNITION SYSTEM ........................................................................................... 9-2
CIRCUIT DIAGRAM ..... .... .............................. ..... ..... .................................. 9-2
TROUBLESHOOTING ...... .............. .' ........................................................... 9-4
ELECTRIC STARTING SYSTEM ..................................................................... 9-6
C IRC UIT DIAGRAM ............................................................... ... ... ....... ....... 9-6
STARTING CIRCUIT CUT-OFF SYSTEM OPERATION ........................... 9-8
TROUBLESHOOTING .................... ....................... ..... .............................. 9-1 O
CHARGING SYSTEM ..................................................................................... 9-12
CIRCUIT DIAGRAM ........................... .......... .... ........................................ 9-12
TROUBLESHOOT ING .............................................................................. 9-14
LIGHTING SYSTEM ....................................................................................... 9-16
CIRCUIT DIAGRAM .. ..... .......... ....................... ......................................... 9-16
TROUBLESHOOTING .............................................................................. 9-18
SIGNALING SYSTEM ..................................................................................... 9-20
CIRCUIT DIAGRAM ............................. .................................................... 9-20
TROUBLESHOOTING .................................... ...... ............. ....................... 9-22
FUEL INJECTION SYSTEM ........................................................................... 9-24
CIRCUIT DIAGRAM ................................................................................. 9-24
YAMAHA DIAGNOSTIC TOOL .. ...... ............................................... ......... 9-26
ECU SELF-DIAGNOSTIC FUNCTION .... ... .................... .......................... 9-27
TROUBLESHOOTIN G METHOD ......... .... ...... .. ..... .. ........ .. .... .......... ......... 9-29
LI ST OF SELF-DIAGNOSTIC AND FAIL-SAFE ACTIONS ...................... 9-30
LI ST OF DIAGNOSTIC CODES ............................ ................................... 9-31
T ROUBLESHOOTING DETAILS .............................................................. 9-33
FUEL PUMP SYSTEM .................................................................................... 9-52
CIRCUIT DIAGRAM ....................................................... ...... .................... 9-52
TROUB LE SHOOTING ............................................................................. 9-54
ELECTRICAL COMPONENTS ....................................................................... 9-56
........................................................... ... .................................................... 9-56
CHECKING THE SWITCHES ................ .............. ..... .. .............................. 9-60
C HECKING THE BULBS AND BULB SOCKETS ..................................... 9-64
REPLACING THE HEADLIGHT BU LB ............ .... ....... .............................. 9-65
CHECKING TH E FUS E ................................................... ......................... 9-65
CHECKING AND CHARGING THE BATTERY ........................................ 9-66
CHECKING TH E RELAYS ....................................................................... 9-69
CHECKING THE DIODE ........ .................................................................. 9-70
CHECKING TH E IGNITION SPARK GAP .............................. .... .......... .... 9-71
CHECKING THE SPARK PLUG CAP ...................................................... 9-71