Yamaha YZF-R25 Service Manual page 344

ELECTRICAL COMPONENTS...................................................................... 8-73
CHECKING THE SWITCHES .................................................................8-77
CHECKING THE BULBS AND BULB SOCKETS ................................... 8-79
CHECKING THE FUSES ........................................................................8-81
REPLACING THE ECU (engine control unit) ..........................................8-81
REMOVING THE ECU (engine control unit) ...........................................8-81
INSTALLING THE ECU (engine control unit) ..........................................8-82
CHECKING AND CHARGING THE BATTERY....................................... 8-82
CHECKING THE RELAYS ...................................................................... 8-85
CHECKING THE DIODES....................................................................... 8-86
CHECKING THE SPARK PLUG CAPS...................................................8-88
CHECKING THE IGNITION COILS......................................................... 8-88
CHECKING THE IGNITION SPARK GAP............................................... 8-89
CHECKING THE CRANKSHAFT POSITION SENSOR.......................... 8-89
CHECKING THE LEAN ANGLE SENSOR.............................................. 8-89
CHECKING THE STARTER MOTOR OPERATION ...............................8-90
CHECKING THE STATOR COIL ............................................................ 8-90
CHECKING THE RECTIFIER/REGULATOR ..........................................8-91
CHECKING THE FUEL SENDER ........................................................... 8-91
CHECKING THE FUEL METER..............................................................8-92
CHECKING THE SPEED SENSOR ........................................................ 8-92
CHECKING THE RADIATOR FAN MOTOR ...........................................8-92
CHECKING THE COOLANT TEMPERATURE SENSOR.......................8-92
CHECKING THE AIR INDUCTION SYSTEM SOLENOID ......................8-93
CHECKING THE GEAR POSITION SWITCH.........................................8-93
CHECKING THE FUEL INJECTORS......................................................8-94