Engine Temperature Sensor; Sensor Assembly - Yamaha WaveRunner Service Manual

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ELEC
IGNITION SYSTEM

ENGINE TEMPERATURE SENSOR

1. Measure:
• Engine temperature sensor resistance
(at the specified temperature)
Out of specification → Replace.
Engine temperature sensor
resistance:
20 °C (68 °F): 54.2–69.0 kΩ
100 °C (212 °F): 3.12–3.48 kΩ
Measurement steps:
• Suspend the engine temperature sensor
in a container filled with water.
• Slowly heat the water.
• Measure the resistance when the speci-
fied temperature is reached.

SENSOR ASSEMBLY

1. Check:
• Intake air temperature sensor
Out of specification → Replace the sen-
sor assembly.
Checking steps:
• Measure the ambient temperature.
• Connect a computer to the watercraft and
use the Yamaha Diagnostic System to
display the intake air temperature.
• If the ambient temperature and the dis-
played intake air temperature differ by
more than ± 5 °C (± 9 °F), replace the
sensor assembly.
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