Electrical System - Yamaha YZ 2023 Series Owner's Service Manual

ELECTRICAL SYSTEM

IGNITION SYSTEM...........................................................................................8-1
CIRCUIT DIAGRAM ...................................................................................8-1
TROUBLESHOOTING................................................................................8-3
ELECTRIC STARTING SYSTEM......................................................................8-5
CIRCUIT DIAGRAM ...................................................................................8-5
TROUBLESHOOTING................................................................................8-7
CHARGING SYSTEM .......................................................................................8-9
CIRCUIT DIAGRAM ...................................................................................8-9
TROUBLESHOOTING..............................................................................8-11
SIGNALING SYSTEM.....................................................................................8-13
CIRCUIT DIAGRAM .................................................................................8-13
TROUBLESHOOTING..............................................................................8-15
FUEL INJECTION SYSTEM ...........................................................................8-17
CIRCUIT DIAGRAM .................................................................................8-17
ECU SELF-DIAGNOSTIC FUNCTION .....................................................8-19
TROUBLESHOOTING METHOD .............................................................8-20
YAMAHA DIAGNOSTIC TOOL ................................................................8-21
CONNECTING THE YAMAHA DIAGNOSTIC TOOL ...............................8-21
TROUBLESHOOTING DETAILS (FAULT CODE)....................................8-23
FUEL PUMP SYSTEM....................................................................................8-43
CIRCUIT DIAGRAM .................................................................................8-43
TROUBLESHOOTING..............................................................................8-45
ELECTRICAL COMPONENTS.......................................................................8-46
CHECKING THE SWITCHES...................................................................8-47
CHECKING THE BULBS AND BULB SOCKETS.....................................8-49
CHECKING THE FUSES..........................................................................8-49
CHECKING AND CHARGING THE BATTERY ........................................8-50
CHECKING THE RELAYS .......................................................................8-51
CHECKING THE RELAY UNIT (DIODE)..................................................8-52
CHECKING THE IGNITION SPARK GAP ................................................8-53
CHECKING THE SPARK PLUG CAP ......................................................8-53
CHECKING THE IGNITION COIL ............................................................8-54
CHECKING THE CRANKSHAFT POSITION SENSOR ...........................8-54
CHECKING THE LEAN ANGLE SENSOR ...............................................8-55
CHECKING THE STARTER MOTOR OPERATION ................................8-55
CHECKING THE STATOR COIL..............................................................8-55
CHECKING THE RECTIFIER/REGULATOR ...........................................8-55
CHECKING THE FUEL SENDER ............................................................8-56
CHECKING THE RESISTOR ...................................................................8-56
CHECKING THE COOLANT TEMPERATURE SENSOR ........................8-57
CHECKING THE THROTTLE POSITION SENSOR INPUT VOLTAGE...8-57
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