Yamaha XSR 900 2022 Service Manual page 374

Quick shift system does not operate.
1. Check that the Auxiliary system
warning does not come on.
OK↓
2. Check that the quick shift system is
working under normal quick shift
system operating conditions.
OK↓
3. Make sure that the quick shift sys-
tem is effective.
(Check whether the "QS
is displayed at the top of the me-
ter.)
OK↓
4. Are you operating while the
"QS " icon is lit?
OK↓
5. Is the transmission gear display
normal?
OK↓
6. Check the connection of the cou-
pler between the gear position sen-
sor and the ECU.
OK↓
7. Are the clutch and neutral switches
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.
OK↓
9. Check the entire signaling sys-
tem's wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-21.
NG→
NG→
" icon NG→
NG→
NG→
NG→
NG→
NG→
NG→
8-27
SIGNALING SYSTEM
Repair the faulty parts.
Check the quick shift system operating
conditions explained in the owner's manu-
al and operate the quick shift system ac-
cordingly.
Activate the quick shift system. (Set the
quick shift system to a setting other than
"OFF".)
Operate while the "QS
Repair the gear position sensor.
Connect the gear position sensor coupler.
Repair the switch if it is not normal.
Replace the shift sensor.
Properly connect or repair the signaling
system's wiring.
" icon is lit.