Yamaha YZ 2018 Series Owner's Service Manual page 298

CHECKING THE CRANKSHAFT POSITION SENSOR...........................8-67
CHECKING THE LEAN ANGLE SENSOR...............................................8-67
CHECKING THE STARTER MOTOR OPERATION ................................8-68
CHECKING THE STATOR COIL..............................................................8-68
CHECKING THE RECTIFIER/REGULATOR ...........................................8-69
CHECKING THE FUEL SENDER ............................................................8-69
CHECKING THE RESISTER....................................................................8-70
CHECKING THE RADIATOR FAN MOTOR (For JPN) ............................8-70
CHECKING THE COOLANT TEMPERATURE SENSOR ........................8-70
CHECKING THE THROTTLE POSITION SENSOR INPUT VOLTAGE.....8-71
CHECKING THE INTAKE AIR PRESSURE SENSOR.............................8-71
CHECKING THE INTAKE AIR TEMPERATURE SENSOR .....................8-72
CHECKING THE FUEL INJECTOR .........................................................8-72