Service manual

YCC-S (Yamaha Chip Controlled-Shift) SYSTEM
– 93 –
Sh_ _31
Engine speed signal
is abnormal.
Engine speed signal from ECU
does not match multi-function
meter engine speed.
Unable Unable
Sh_ _32*
YCC-S speed sensor
signal is abnormal.
YCC-S speed sensor signal does
not match multi-function meter ve-
hicle speed.
Unable Unable
Sh_ _34
TPS (throttle position
sensor) signal is ab-
normal.
TPS (throttle position sensor) sig-
nal voltage is too low or too high
Unable Able
Sh_ _35
Start switch signal is
abnormal.
Signal is received from start switch
while vehicle is driven.
Able Able
Sh_ _36
Output signal of clutch
actuator sensor is ab-
normal.
Signals received from clutch actu-
ator sensor 1 and clutch actuator
sensor 2 are different or signal
voltage is too low or too high.
Unable Unable
Sh_ _37*
Power supply to
clutch or shift actuator
motor is abnormal.
Battery voltage is good, but motor
terminal voltage is too low.
Unable Unable
Sh_ _38
Malfunction of hand
shift lever switch (shift
up or shift down)
Both the on and off circuits of the
hand shift lever switch (shift up or
shift down) are closed at the same
time.
Able Able
Sh_ _39
Ignition timing retard
output signal is abnor-
mal.
Detected ignition retard signal
from MCU (motor control unit) to
ECU is abnormal.
Able Able
Sh_ _41
Coolant temperature
sensor signal is ab-
normal.
Coolant temperature sensor signal
is too high or too low
Able Able
Sh_ _42
Communication be-
tween ECU and multi-
function meter is ab-
normal.
Error detected in communication
signal between ECU and multi-
function meter.
Unable Able
Sh_ _43
Communication be-
tween MCU (motor
control unit) and ABS
ECU is abnormal.
ABS ECU continuously sends sig-
nals to activate ABS.
Able Able
Sh_ _44*
Clutch actuator sen-
sor signal is abnor-
mal.
Clutch is completely engaged, but
signal sent from clutch actuator
sensor indicates clutch is disen-
gaged.
Unable Unable
Sh_ _45*
Shift operation and
gear position do not
match.
Gear position has not changed af-
ter shifting by shift actuator (mis-
shift occurs repeatedly).
Unable Unable
Sh_ _46*
Engine speed and
gear position sensor
signal do not match
while vehicle is driven.
Gear position calculated by MCU
(motor control unit) is different
from foot shift switch signal.
Unable Unable
Fault
code No.
Symptom Malfunction detecting condition
Able/un-
able to start
Able/un-
able to
change the
shift