Thermo Unit; Thermo Guage - Sym Joyride 125 Service Manual

18. Electrical System

Thermo Unit

Remove the thermo unit.
Hang the thermo unit in an oil heater, heat the
oil and measure the resistance at each
temperature.
Temperature
50°C
Resistance
134~149 47.5~57.0 26~29 14.8~17.2
(Ω)
Caution
Wear gloves and goggles when
performing this test.
Caution
Engine oil should be used as a heating
medium as the test temperature must be
higher than 100℃.
Contacting the container wall by the
thermometer and the sensor may result in
wrong readings.
Thermo Gauge
Disconnect the thermo unit coupler and
connect it to engine ground.
Turn on the main switch.
The needle of the thermo gauge should move
to other end, H position.
Caution
Do not ground the thermo gauge more
than 5 seconds, or the meter will be
damaged.
18-22
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80°C 100°C 120°C
Thermo unit