Yamaha YZF-R25 Service Manual page 403

Fault code No.
Item
C-2 Clutch lever adjustment.
C-3 Connection of clutch switch cou-
pler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
C-4 Connection of ECU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
C-5 Wire harness continuity.
42
Speed sensor: no normal signals are received from the speed
A
sensor.
B Gear position switch: open or short circuit is detected.
C Clutch switch: open or short circuit is detected.
Refer to "ADJUSTING THE
CLUTCH LEVER FREE PLAY"
on page 3-12.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Open or short circuit → Replace
the wire harness.
Between clutch switch coupler
and main switch coupler.
blue/yellow–blue/yellow
Between left handlebar switch
coupler and diode 4.
yellow/black–yellow/black
Between diode 4 and ECU cou-
pler.
black/yellow–black/yellow
8-58
FUEL INJECTION SYSTEM
Execute the diagnostic mode.
(Code No. 21)
When the clutch lever is re-
leased with the transmission in
gear: "OFF"
When the clutch lever is
squeezed with the transmission
in gear: "ON"
Correct indication→ Go to item
C-9 and delete the fault code.
Incorrect indication → Go to
item C-3.
Execute the diagnostic mode.
(Code No. 21)
When the clutch lever is re-
leased with the transmission in
gear: "OFF"
When the clutch lever is
squeezed with the transmission
in gear: "ON"
Correct indication→ Go to item
C-9 and delete the fault code.
Incorrect indication → Go to
item C-4.
Execute the diagnostic mode.
(Code No. 21)
When the clutch lever is re-
leased with the transmission in
gear: "OFF"
When the clutch lever is
squeezed with the transmission
in gear: "ON"
Correct indication→ Go to item
C-9 and delete the fault code.
Incorrect indication → Go to
item C-5.
Execute the diagnostic mode.
(Code No. 21)
When the clutch lever is re-
leased with the transmission in
gear: "OFF"
When the clutch lever is
squeezed with the transmission
in gear: "ON"
Correct indication→ Go to item
C-9 and delete the fault code.
Incorrect indication → Go to
item C-6.