Yamaha YZF-R125 Service Manual: Checking the coolant temperature sensor

Yamaha YZF-R125 Service Manual / Electrical system / Electrical components / Checking the coolant temperature sensor

1. Remove:

Coolant temperature sensor

WARNING

Handle the coolant temperature sensor with special care.
Never subject the coolant temperature sensor to strong shocks. If the coolant temperature sensor is dropped, replace it.

2. Check:

Coolant temperature sensor resistance Out of specification →Replace.

a. Connect the pocket tester ( ×
100) to the coolant temperature sensor terminals as shown.

b. Immerse the coolant temperature sensor "1" in a container filled with coolant "2".

NOTE:

Make sure the coolant temperature sensor terminals do not get wet.

c. Place a thermometer "3" in the coolant.

Checking the coolant temperature sensor

d. Slowly heat the coolant, and then let it cool down to the specified temperature.

e. Check the coolant temperature sensor resistance.

3. Install:

Coolant temperature sensor

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