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Is it safe to drive 05 Prius.

Discussion in 'Gen 2 Prius Main Forum' started by LINGARAJU GOTTUMUKKALA, Jul 21, 2020.

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  1. bisco

    bisco cookie crumbler

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    see post #14
     
    #21 bisco, Jul 23, 2020
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  2. Prodigyplace

    Prodigyplace 2025 Camry XLE FWD

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    Yes, and that is required by the standard.
     
    #22 Prodigyplace, Jul 23, 2020
  3. ChapmanF

    ChapmanF Senior Member

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    To be clear, what the standard requires is that the diagnostic connector always have +12 supply on pin 16.

    And most OBD dongle thingies get their power from pin 16.

    Well-designed ones meant for permanent connection (the ScanGauge II is an example) have a sleep mode they go into so that, when the car is off, they draw very little power from pin 16. That sleep mode is a feature of later revisions of the ELM327 chip, only needs a few extra components in the circuit and firmware that does the needful.

    Some other dongles ... well, they don't do that.
     
    #23 ChapmanF, Jul 23, 2020
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  4. Frijjj

    Frijjj Member

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    #24 Frijjj, Jul 23, 2020
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