FI SYSTEM DIAGNOSIS 12-11
COMPENSATION OF INJECTION TIME (VOLUME)
The following different signals are output from the respective sensors for compensation of the fuel injection
time (volume).
INJECTION STOP CONTROL
SIGNAL
DESCRIPTION
ENGINE COOLANT TEMPERATURE SEN-
SOR SIGNAL
When engine coolant temperature is low, injection time (vol-
ume) is increased.
INTAKE AIR TEMPERATURE SENSOR
SIGNAL
When intake air temperature is low, injection time (volume)
is increased.
POWER SUPPLY VOLTAGE SIGNAL
ECM operates on the power generation voltage and at the
same time, it monitors the voltage signal for compensation
of the fuel injection time (volume). A longer injection time is
needed to adjust injection volume in the case of low voltage.
ACCELERATION SIGNAL/
DECELERATION SIGNAL
During acceleration, the fuel injection time (volume) is
increased in accordance with the throttle opening speed and
engine rpm. During deceleration, the fuel injection time (vol-
ume) is decreased.
SIGNAL
DESCRIPTION
TIP-OVER SENSOR SIGNAL
(FUEL SHUT-OFF)
When the motorcycle tips over, the tip-over sensor sends a
signal to the ECM. Then, this signal cuts OFF current sup-
plied to the fuel pump, fuel injector and ignition coil.
OVER-REV. LIMITER SIGNAL
The fuel injector and ignition signal stop operation when
engine rpm reaches rev. limit rpm.
