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FUEL SYSTEM (DFI) 3-77
Ve hicle-down Sensor (Service Code 31)
This sensor has a weight [A] with two magnets inside, and
sends a signal to the ECU. But when the motorcycle banks
60 ∼ 70° or more to either side (in fact falls down), the weight
turns and shuts off the signal. The ECU senses this change,
and stops the fuel pump, the fuel injectors, and the ignition
system.
Hall IC [B]
When the motorcycle is down, the ignition switch is left
ON. If the starter button is pushed, the electric starter turns
but the engine doesn’t start. To start the engine again, raise
the motorcycle, turn the ignition switch OFF, and then ON.
When the ignition switch is turned ON, current flows through
the latch-up circuit and the transistor in the circuit is turned
ON to unlock the latch-up circuit.
Vehicle-down Sensor [A]
Ground Terminal BR/BK [B]
Output Terminal Y/G [C]
Power Source Terminal BL [D]
Removal
CAUTION
Never drop the vehicle-down sensor, especially on
a hard surface. Such a shock to the sensor can
damage it.
•
Remove:
Seat Cover (see Seat Cover Removal in the Frame
chapter)
Connector [A]
Bolts [B]
Vehicle-down Sensor [C]
Installation
•
The UP mark [A] of the sensor should face upward.
WARNING
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 vehicle-down sensor is held in place by the
sensor brackets.
•
Tighten:
Torque - Vehicle-down Sensor Bolts: 6.0 N·m (0.60 kgf·m,
53 in·lb)
Inspection
NOTE
○
Be sure the battery is fully charged.
•
Remove the seat cover (see Seat Cover Removal in the
Frame chapter).
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