3-62 FUEL SYSTEM (DFI)
Vehicle-down Sensor (Service Code 31)
Never drop the down-sensor, especially on a hard
surface. Such a shock to the sensor can damage it.
Remove the seat (see Frame chapter).
Remove the bolt [A] and take out the vehicle-down sensor
Raise the connector lock, and disconnect the connector
[C] to complete sensor removal.
Install the vehicle-down sensor assy [A] in the original po-
sition. The arrow mark [B] on the sensor must be on the
front and point upward.
Do not install the sensor upside down.
Tighten the sensor bracket bolt [C] securely.
Install the seat (see Frame chapter).
Incorrect installation of the vehicle-down sensor
could cause sudden loss of engine power. The
rider could lose balance during certain riding situ-
ations, like leaning over in a turn, with the potential
for an accident resulting in injury or death. Ensure
that the down sensor is held in place by the bracket
and its bolt as shown.
Be sure the battery is fully charged.
Take out the vehicle-down sensor [A] (see this section).
Do not disconnect the connector [B].
Connect a digital volt meter [C] to the connector (natural,
3P), using two needle adapters [D].
Special Tool - Needle Adapter Set: 57001–1457
Turn the ignition SW ON, and measure the power source
voltage with the connector joined.
Vehicle-down Sensor Power Source Voltage
Connections to Sensor
Meter (+) → BR lead [E]
Meter (–) → BK/Y lead [F]
Power Source Voltage at Sensor
Turn the ignition SW OFF.
If there is no battery voltage, check the DFI power source
circuit (see DFI Power Source Section in this chapter).
Battery Voltage (12.5 V or more)