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Speedo brightness

Discussion in 'Gen 2 Prius Technical Discussion' started by Britprius, Aug 27, 2012.

  1. Britprius

    Britprius Senior Member

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    Does anyone know if the speedo display brightness on the UK/Europe version of the Prius is controlled by a 12v input to the display or controlled via the can bus.

    In the UK/EU cars the speedo does not have a dimmer switch it dims automatically when the side lights are turned on, this is a problem in the daytime because if it is raining or fogy it is required by law to switch on the lights this then dims the display making it difficult or impossible to see the speedo if conditions are still bright or sunny (it does happen).

    If the display is controlled by an input from the lights it should be a simple matter to break this input with a switch thus keeping the display at it's normal daytime level.
     
    #1 Britprius, Aug 27, 2012
  2. Britprius

    Britprius Senior Member

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    The only wiring diagram I have for the above problem is for the US version. This shows a wire going from the rheostat to pin 28, "wire light blue" of the combination meter, so maybe find pin 28 disconnect and see what happens.
     
    #2 Britprius, Aug 27, 2012
  3. Jaquimo

    Jaquimo Paraglider, Prius glider...

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    Hi Britprius, I had the same problem with the display dimming when I switched the lights on until I found out that if you press the display dimmer switch in for 2 to 3 seconds the display brightens up like when the lights were switched off. On our Prii the display dimmer switch is located to the right of the Hazard Lights and the ODO TRIP switches below the MFD.
     
    #3 Jaquimo, Aug 27, 2012
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  4. Britprius

    Britprius Senior Member

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    Thanks for the information but the UK/EU version does not have that switch.
     
    #4 Britprius, Aug 27, 2012
  5. PhilWray

    PhilWray Member

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    The dimmer button on my T-Spirit is the same as the kph/mph button but is only active when the lights are on

    Regards,

    Phil
     
    #5 PhilWray, Aug 27, 2012
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  6. Bradkb

    Bradkb Junior Member

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    I have a UK 2005 T3 model, and it does have a dash dimmer, next to the ODO switch is the switch to flick to KPH, if you press it quickly it will change the dash board brightness. Everytime you press it the dash will dim slightly more, until it flips to full brightness.

    Hope this helps.

    Brad
     
    #6 Bradkb, Aug 27, 2012
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  7. Britprius

    Britprius Senior Member

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    Phil and Brad thanks for the information, checked it out and it works. Could not find it in the hand book and it is not exactly intuitive. Thanks again.

    John.
     
    #7 Britprius, Aug 28, 2012
  8. Paradox

    Paradox Prius Enthusiast / Moderator
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    Cool, so the UK/EU version does have it! I thought it to be strange to not have made the option available to people.
     
    #8 Paradox, Aug 28, 2012
  9. Britprius

    Britprius Senior Member

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    I was pleased to have this option pointed out although I have search the manual many times so I guess I am guilty of not RTFM. I must state that as with other control options on the Prius it is not intuitive and means that there are two independent adjustments for the dash displays, one for the MFD, and one for the combination meter.
     
    #9 Britprius, Aug 28, 2012
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  10. Paradox

    Paradox Prius Enthusiast / Moderator
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    Ours is like that, the dimmer switch only does dash lights, the Nav display brightness is changed from a setting in the display.
     
    #10 Paradox, Aug 28, 2012
  11. Radu Stauceanu

    Radu Stauceanu Junior Member

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    Thank you! It took me one year to find this!
     
    #11 Radu Stauceanu, Oct 15, 2017
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