Yamaha R15 2022, Service Manual

Page: 354 / 497

8-21
SIGNALING SYSTEM
– + ELEC
QS (Quick Shift System) does not operate.
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
1. Check that the engine trouble and
system warning light does not come
on. Repair the faulty parts.
2. Check that the QS is working under
normal QS operating conditions.
Check the QS operating conditions
explained in the owner’s manual and
operate the QS accordingly.
3. Make sure that the QS is effective.
(Check whether the “QS” icon is
displayed at the top of the meter.)
Activate the QS. (Set the QS to a setting
other than “OFF”.)
4. Check that the quick shift switch
coupler is connected.
Connect the quick shift switch coupler.
5. Check the quick shift switch.
Refer to “DIAGNOSTIC CODE:
SENSOR OPERATION TABLE” on
page 8-44 and “CHECKING THE
SWITCHES” on page 8-139.
Replace the quick shift switch.
6. Check the gear position switch.
Refer to “DIAGNOSTIC CODE:
SENSOR OPERATION TABLE” on
page 8-44 and “CHECKING THE
SWITCHES” on page 8-139.
Replace the gear position switch.
7. Check the entire signaling system’s
wiring.
Refer to “CIRCUIT DIAGRAM” on
page 8-16. Properly connect or repair the signaling
system’s wiring.
Replace the ECU.
Refer to “REPLACING THE ECU
(engine control unit)” on page 8-142.
BCWF8197E0.book Page 21 Thursday, November 18, 2021 9:18 AM