The subthrottle sensor is a rotating variable resistor that change output voltage according to throttle operating. The ECU senses this voltage change and determines fuel injection quantity, and ignition timing according to engine rpm, and throttle opening.
Input Terminal [A]: BL Output Terminal [B]: BL/W Ground Terminal [C]: BR/BK

Vehicle-down Sensor Output Voltage Inspection
Subthrottle Sensor Removal/AdjustmentBattery Ground
Before completing any service on the motorcycle, disconnect
the battery cables from the battery to prevent the engine
from accidentally turning over. Disconnect the ground
cable (–) first and then the positive (+). When completed
with the service, first connect the positive (+) cable to the
p ...
Intake Air Pressure Sensor #2 Input Voltage Inspection
NOTE
Be sure the battery is fully charged.
Turn the ignition switch to OFF.
Remove the air cleaner housing (see Air Cleaner Housing
Removal in the Fuel System (DFI) chapter).
Disconnect the intake air pressure sensor #2 connector
and connect the measuring adapter [A] between these
con ...
Throttle Control System
Check the throttle grip play each day
before riding the motorcycle, and carry
out maintenance and adjustments in
accordance with the Periodic Maintenance
Chart. Adjust it if necessary.
Throttle Grip
The throttle grip controls the butterfly
valves in the throttle body. If the throttle
grip ha ...