ELECTRICAL COMPONENTS ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Set the engine tachometer to the cylinder-#1 left spark plug lead or right spark plug lead. b. Connect the pocket tester (DC 20 V) to the rectifier/regulator coupler as shown.
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Pocket tester 90890-03112 Analog pocket tester YU-03112-C
2
c. Measure the horn resistance.
• Positive tester probe → red “1” • Negative tester probe → black “2”
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2. Check: • Horn sound Faulty sound → Adjust or replace. ▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect a battery (12 V) to the horn. b. Turn the adjusting screw in direction “a” or “b” until the horn sound is obtained.
B B B
R
1
B
a
2
b
c. Start the engine and let it run at approximately 5000 r/min. d. Measure the charging voltage. ▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲ ▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS28180
CHECKING THE HORN 1. Check: • Horn resistance Out of specification → Replace.
EAS28210
CHECKING THE ENGINE TEMPERATURE SENSOR 1. Remove: • Engine temperature sensor (from the front cylinder head)
Coil resistance 1.01–1.11 Ω at 20 °C (68 °F)
EWA14140
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a. Disconnect the horn leads from the horn terminals. b. Connect the pocket tester (Ω × 1) to the horn terminals. Pocket tester 90890-03112 Analog pocket tester YU-03112-C
WARNING
• Handle the engine temperature sensor with special care. • Never subject the engine temperature sensor to strong shocks. If the engine temperature sensor is dropped, replace it. 2. Check: • Engine temperature sensor resistance Out of specification → Replace. Engine temperature sensor resistance 0.90–1.10 kΩ at 100 °C (212 °F)
• Positive tester probe → horn terminal “1” • Negative tester probe → horn terminal “2”
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