Yamaha YZ450F 2021 - Electrical System

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ELECTRICAL SYSTEM
IGNITION SYSTEM...........................................................................................8-1
CIRCUIT DIAGRAM ...................................................................................8-1
TROUBLESHOOTING................................................................................8-3
ELECTRIC STARTING SYSTEM......................................................................8-7
CIRCUIT DIAGRAM ...................................................................................8-7
TROUBLESHOOTING................................................................................8-9
CHARGING SYSTEM .....................................................................................8-11
CIRCUIT DIAGRAM .................................................................................8-11
TROUBLESHOOTING..............................................................................8-13
FUEL INJECTION SYSTEM ...........................................................................8-15
CIRCUIT DIAGRAM .................................................................................8-15
YAMAHA DIAGNOSTIC TOOL ................................................................8-17
CONNECTING THE YAMAHA DIAGNOSTIC TOOL ...............................8-17
TROUBLESHOOTING DETAILS (FAULT CODE)....................................8-19
FUEL PUMP SYSTEM....................................................................................8-39
CIRCUIT DIAGRAM .................................................................................8-39
TROUBLESHOOTING..............................................................................8-41
ELECTRICAL COMPONENTS.......................................................................8-42
CHECKING THE SWITCHES...................................................................8-43
CHECKING THE FUSES..........................................................................8-45
CHECKING AND CHARGING THE BATTERY ........................................8-45
CHECKING THE RELAYS .......................................................................8-47
CHECKING THE RELAY UNIT (DIODE)..................................................8-47
CHECKING THE IGNITION SPARK GAP................................................8-48
CHECKING THE SPARK PLUG CAP ......................................................8-48
CHECKING THE IGNITION COIL ............................................................8-49
CHECKING THE CRANKSHAFT POSITION SENSOR...........................8-49
CHECKING THE LEAN ANGLE SENSOR...............................................8-50
CHECKING THE STARTER MOTOR OPERATION ................................8-50
CHECKING THE STATOR COIL..............................................................8-50
CHECKING THE RECTIFIER/REGULATOR ...........................................8-50
CHECKING THE COOLANT TEMPERATURE SENSOR........................8-51
CHECKING THE THROTTLE POSITION SENSOR INPUT VOLTAGE...8-52
CHECKING THE INTAKE AIR TEMPERATURE SENSOR .....................8-52
CHECKING THE GEAR POSITION SWITCH ..........................................8-53
CHECKING THE INJECTOR....................................................................8-53