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Yamaha MT-09 2021 - Page 392

Yamaha MT-09 2021
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8-37
SIGNALING SYSTEM
QSS (Quick Shift System) does not operate.
1. Check that the MIL does not come
on.
NG Repair the faulty parts.
OK
2. Check that the QSS is working un-
der normal QSS operating condi-
tions.
NG
Check the QSS operating conditions ex-
plained in the owner’s manual and operate
the QSS accordingly.
OK
3. Make sure that the QSS is effec-
tive.
(Check whether the “QS ” icon
is displayed at the top of the me-
ter.)
NG
Activate the QSS. (Set the QSS to a set-
ting other than “OFF”.)
OK
4. Are you operating while the
“QS ” icon is lit?
NG
Operate while the “QS ” icon is lit.
OK
5. Is the transmission gear display
normal?
NG Repair the gear position sensor.
OK
6. Check the connection of the cou-
pler between the gear position sen-
sor and the ECU.
NG Connect the gear position sensor coupler.
OK
7. Are the clutch and neutral switches
normal?
NG Repair the switch if it is not normal.
OK
8. Check the shift sensor value in the
diagnostic mode.
2.5 V when the shift pedal is not be-
ing operated.
4.5 V when the shift pedal is
pressed fully in.
0.5 V when the shift pedal is
pushed fully up.
NG Replace the shift sensor.
OK
9. Check the entire signaling sys-
tem’s wiring.
Refer to “CIRCUIT DIAGRAM” on
page 8-29.
NG
Properly connect or repair the signaling
system’s wiring.
OK

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