Troubleshooting - Yamaha WR450FN 2022 Owner's Service Manual

EAM30349

TROUBLESHOOTING

• The speedometer does not operate normally.
• The fuel level warning light does not come on.
TIP
Before troubleshooting, remove the following part(s):
1. Seat
2. Side cover (left/right)
3. Air scoop (left/right)
4. Fuel tank
1. Check the fuse.
Refer to "CHECKING THE FUSES"
on page 8-59.
OK
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-60.
OK
3. Check the main relay.
Refer to "CHECKING THE RE-
LAYS" on page 8-62.
OK
4. Check the entire signaling system's
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-15.
OK
This circuit is OK.
Check the signaling system
The speedometer fails to operate.
1. Check the speed sensor.
Refer to "CHECKING THE SPEED
SENSOR" on page 8-68.
OK
2. Check the entire signaling system's
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-15.
OK
Replace the meter assembly and/or
ECU.
SIGNALING SYSTEM
Replace the fuse(s).
NG
• Clean the battery terminals.
• Recharge or replace the battery.
NG
Replace the main relay.
NG
Properly connect or repair the signaling
system's wiring.
NG
Replace the speed sensor.
NG
Properly connect or repair the signaling
system's wiring.
NG
8-17