Is there a way to test / trigger radiator fan?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Atari, Oct 21, 2018.

  1. Atari

    Atari Member

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    Engine overheating icon / problem.

    I can see that the fan in front of the inverter is on, but the other (larger) fan in front radiator is not.

    Is there a way in maintenance mode or some other method to trigger the fan(s) to come on for testing purposes?
     
    #1 Atari, Oct 21, 2018
  2. Mendel Leisk

    Mendel Leisk Senior Member

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    Running AC set good and cold should cycle both fans off and on pretty frequently.

    See if any codes are stored.
     
    #2 Mendel Leisk, Oct 21, 2018
  3. Patrick Wong

    Patrick Wong DIY Enthusiast

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    What is the fluid level in the radiator?

    Do not rely just on looking at the fluid level in the overflow reservoir.
     
    #3 Patrick Wong, Oct 21, 2018
  4. Elektroingenieur

    Elektroingenieur Senior Member

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    Aside from @Mendel Leisk's suggestion, there should be a “Cooling Fan” setting, to force the fan on or off, in the Active Test menu for the SFI (engine control) system in the Toyota Techstream diagnostic software.
     
    #4 Elektroingenieur, Oct 21, 2018
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  5. ChapmanF

    ChapmanF Senior Member

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    On what kind of car? Your profile says "other non-hybrid".
     
    #5 ChapmanF, Oct 21, 2018
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