Checking The Horn; Checking The Oil Level Switch - Yamaha YZF-R1(B) 2012 Service Manual

2. Check:
• Rectifier/regulator output voltage
Out of specification → Replace the recti-
fier/regulator.
Rectifier/regulator output volt-
age
14.2–14.8 V
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a. Set the engine tachometer to the ignition
coil of cylinder #1.
b. Connect the pocket tester (DC 20 V) to the
rectifier/regulator coupler as shown.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Red "1"
• Negative tester probe
Black "2"
c. Start the engine and let it run at approxi-
mately 5000 r/min.
d. Measure the rectifier/regulator output volt-
age.
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EAS28180

CHECKING THE HORN

1. Check:
• Horn resistance
Out of specification → Replace.
Coil resistance
1.07–1.11 Ω at 20 °C (68 °F)
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a. Disconnect the horn leads from the horn
terminals.
ELECTRICAL COMPONENTS
b. Connect the pocket tester (Ω × 1) to the
horn terminals.
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
• Positive tester probe
Horn terminal "1"
• Negative tester probe
Horn terminal "2"
c. Measure the horn resistance.
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2. Check:
• Horn sound
Faulty sound → Replace.
EAS28190

CHECKING THE OIL LEVEL SWITCH

1. Drain:
• Engine oil
2. Remove:
• Oil level switch
(from the oil pan)
3. Check:
• Oil level switch resistance
Out of specification → Replace.
Oil level switch
Maximum level position resis-
tance
484–536 Ω
Minimum level position resis-
tance
114–126 Ω
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a. Connect the pocket tester (Ω × 100) to the
oil level switch terminal as shown.
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