Yamaha YZF-R1 Series Service Manual page 482

Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with ta-
chometer
YU-A1927
• Positive tester probe
white "1"
• Negative tester probe
white "2"
• Positive tester probe
white "1"
• Negative tester probe
white "3"
• Positive tester probe
white "2"
• Negative tester probe
white "3"
b. Start the engine and let it run at approxi-
mately 5000 r/min.
c. Measure the rectifier/regulator input volt-
age.
2. Check:
• Rectifier/regulator output voltage
Out of specification → Replace the rectifier/
regulator.
Regulated voltage (DC)
14.3–14.7 V
a. Connect the digital circuit tester (DC V) to
the battery as shown.
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with ta-
chometer
YU-A1927
• Positive tester probe
positive battery terminal "1"
• Negative tester probe
negative battery terminal "2"
1 2 3
W W W
8-47
ELECTRICAL COMPONENTS
2
b. Start the engine and let it run at approxi-
mately 5000 r/min.
c. Measure the charging voltage.
EAS30569
CHECKING THE HORN
1. Check:
• Horn sound
Faulty sound → Replace.
EAS30573
CHECKING THE FUEL SENDER
1. Disconnect:
• Fuel pump coupler
(from the wire harness)
• Fuel hose
(from the fuel tank)
2. Remove:
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
3. Remove:
• Fuel pump
(from the fuel tank)
4. Connect:
• Fuel pump coupler
• Fuel hose
5. Turn the main switch to "ON".
6. Check:
• Fuel level warning light
Out of specification → Replace the fuel
pump.
• Fuel pump is atmosphere "A"
→ Fuel level warning light is come on
• Fuel pump is soaked in fuel "B"
→ Fuel level warning light is goes off
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