Vehicle-down Sensor (Service Code 31)
Vehicle-down Sensor Removal/Installation
Never drop the vehicle-down sensor especially on
a hard surface. Such a shock to the sensor can
Fuel Tank (see Fuel Tank Removal)
Fuel Tank Bracket (see Air Cleaner Element Replace-
ment in the Periodic Maintenance chapter)
Connector [B] (Disconnect)
Vehicle-down Sensor [C] and Damper
Installation is the reverse of removal.
The UP mark [A] of the sensor should face upward.
Incorrect installation of the vehicle-down sensor
could cause sudden loss of engine power. The
rider could lose balance during certain riding situ-
ations for an accident resulting in injury or death.
Ensure that the vehicle-down sensor is held in
place by the sensor bracket.
Vehicle-down Sensor Inspection
Be sure the battery is fully charged.
Connect a digital meter [A] to the connector [B] of the
vehicle-down sensor [C] with the needle adapter set [D].
Special Tool - Needle Adapter Set: 57001-1457
Vehicle-down Sensor Power Source Voltage
Connections to Sensor Connector:
Meter (+) → BL lead [E]
Meter (–) → BR/BK lead [F]
Turn the ignition switch to ON, and measure the power
source voltage with the connector joined.
DC 4.75 ∼ 5.25 V
Turn the ignition switch to OFF.
If the reading of input voltage is less than the standard,
check the ECU for its ground, power supply and wiring.
If the power source is normal, check the output voltage.
FUEL SYSTEM (DFI) 3-59