Thermo Sensor - Yamaha WaveRunner FX SHO Service Manual

– +
ELEC
Control system
1
B/L B/O
B B
7-22

Thermo sensor

1. Measure:
• Thermo sensor input voltage
Out of specification → Check the wiring
harness.
Measurement steps:
1. Disconnect the thermo sensor coupler 1.
2. Push the unlock button, and then measure
the input voltage at the thermo sensor cou-
pler terminals (wiring harness end).
Thermo sensor input voltage
(reference data):
Black/blue (B/L) –
Black/orange (B/O)
4.75–5.25 V
2. Measure:
• Thermo sensor resistance (at the speci-
fied temperatures)
Out of specification → Replace the
thermo sensor.
Measurement steps:
1. Remove the thermo sensor.
Refer to "Muffler disassembly" in Chapter
5.
2. Suspend the thermo sensor in a container
filled with water.
3. Slowly heat the water.
4. Measure the resistance when the specified
temperatures are reached.
Thermo sensor resistance (reference
data):
Black (B) – Black (B)
0 °C (32 °F): 24.0–37.1 kΩ
100 °C (212 °F): 0.87–1.18 kΩ
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