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

    Checking the radiator fan motor
    1. Check: Radiator fan motor Faulty/rough movement → Replace. a. Disconnect the radiator fan motor coupler from the wire harness. b. Connect the battery (DC 12 V) as shown. Posi ...

    Checking the throttle body sensor assembly
    WARNING Do not remove the throttle body sensor assembly. Handle the throttle body sensor assembly with special care Never subject the throttle body sensor assembly to strong ...

    Other materials:

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    1. Lubricate: Rocker arms Rocker arm shafts 2. Lubricate: Camshaft 3. Install: Camshaft "1" NOTE: Make sure that the camshaft projections "a" and hole "b" are positioned as shown in the illustration. 4. Install: Rocker arms Rocker arm shafts "1" NOTE: Make ...

    Assembling the rear brake caliper
    WARNING Before installation, all internal brake components should be cleaned and lubricated with clean or new brake fluid. Never use solvents on internal brake components as they will cause the brake caliper piston dust seal and piston seal to swell and distort. ...

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