Yamaha YZF-R1 2007 Service Manual

ELECTRICAL COMPONENTS8-100d. Measure the voltage (DC 5 V) of White/Yel-low and Black/Blue. With each full rotationof the rear wheel, the voltage readingshould cycle from 0.6 V 4.8V to 0.6 V to 4.8V.▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲EAS4C81021CHECKING THE RADIATOR FAN MOTORS1. Check:• Radiator fan motorFaulty/rough movement → Replace.▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Disconnect the radiator fan motor couplerfrom the wire harness.b. Connect the battery (DC 12 V) as shown.c. Measure the radiator fan motor movement.▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲EAS28260CHECKING THE COOLANT TEMPERATURESENSOR1. Remove:• Coolant temperature sensorWARNINGEWA14130• Handle the coolant temperature sensorwith special care.• Never subject the coolant temperaturesensor to strong shocks. If the coolanttemperature sensor is dropped, replace it.2. Check:• Coolant temperature sensor resistanceOut of specification → Replace.▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼a. Connect the pocket tester (Ω × 100) to thecoolant temperature sensor “1” as shown.b. Immerse the coolant temperature sensor ina container filled with coolant “2”.NOTE:Make sure the coolant temperature sensor ter-minals do not get wet.c. Place a thermometer “3” in the coolant.• Positive tester probeBlue “1”• Negative tester probeBlack “2”Coolant temperature sensorresistance0°C (32°F): 5.21–6.37 kΩ80°C (176°F): 0.29–0.35 kΩPocket tester90890-03112Analog pocket testerYU-03112-C• Positive tester probeCoolant temperature sensor terminal• Negative tester probeCoolant temperature sensor terminalManuals by Motomatrix / www.motomatrix.co.uk / The Solution For Lost Motorcycle Coded Keysemail: info@motomatrix.co.uk