Yamaha R15 2022 Service Manual page 484

CHECKING THE HORN
1. Check:
• Horn resistance
Out of specification → Replace.
Coil resistance
1.35–1.75 Ω
a. Disconnect the horn connectors from the
horn terminals.
b. Connect the multimeter (Ω × 1) to the horn
terminals.
Multimeter
INS-003
(90890-03189)
• Positive tester probe →
horn terminal "1"
• Negative tester probe →
horn terminal "2"
1
c. Measure the horn resistance.
EAS30573
CHECKING THE FUEL SENDER
1. Disconnect:
• Fuel pump coupler
(from the wire harness)
• Fuel sender coupler
(from the wire harness)
2. Remove:
• Fuel pump
(from the fuel tank)
3. Check:
• Fuel sender resistance
Out of specification → Replace the fuel send-
er.
Sender unit resistance (full)
10.0–14.0 Ω
Sender unit resistance (empty)
267.0–273.0 Ω
ELECTRICAL COMPONENTS
2
a. Connect the multimeter (Ω × 10) to the fuel
sender coupler as shown.
Multimeter
INS-003
(90890-03189)
• Positive tester probe →
terminal "1"
• Negative tester probe →
terminal "2"
b. Move the fuel sender float to the minimum
"3" and maximum "4" level positions.
c. Measure the fuel sender resistance.
EAS31372
CHECKING THE FUEL METER
This model is equipped with a self-diagnosis de-
vice for the fuel level detection circuit.
1. Check:
• Fuel meter "1"
(Turn the main switch to "ON")
Fuel meter comes on for a few seconds, then
goes off → Fuel meter is OK.
Fuel meter does not come on → Replace the
fuel pump sender or meter assembly.
All the fuel meter display segments flash re-
peatedly → Check entire fuel pump circuit.
Refer to "TROUBLESHOOTING" on page
8-100.
8-151
ELEC – +
1
2