Yamaha 2002 TDM900, Service Manual

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1-16
FEATURES
GEN
INFO
F Cut-off switch tilt angle
G Fuel injection system
relay OFF
H Lag time
A Normal
B Tilts
C Output voltage
D High level
E Low level
1
Float
Lean angle cut-off switch
The lean angle cut-off switch stops the supply of fuel to the engine in case the motorcycle overturns.
When the motorcycle is in the normal state, the cut-off switch outputs a constant voltage of approxi-
mately 1.0 V (low level). When the motorcycle tilts, the float in the switch tilts in proportion to the tilt of
the motorcycle. However, the voltage output to the ECU remains unchanged at the low level.
When the tilt of the motorcycle exceeds 70 degrees (according to the tilt of the float), the signal from the
sensor increases to approximately 4.0 V (high level). When the ECU receives the high-level voltage, it
determines that the motorcycle has overturned, and stops the delivery of fuel to the engine by turning
OFF the fuel injection system relay that powers the fuel pump and the injectors. Once the cut-off switch
is tripped, the ECU maintains this state; therefore, even if the motorcycle has recovered its upright
position, this state will not be canceled unless the main switch is turned OFF, and then turned back ON.