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Thread: 12 volt switch input

  1. #1
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    Default 12 volt switch input

    On the V2 interface there are 2 12 volt switch inputs. What are they used for? I thought I read something about them a while back but, can't seem to find the thread.

    Thanks

  2. #2
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    I thought they were 12V analog inputs which should read the voltage from 0-12V.

    Ira

  3. #3
    Lifetime Member GMPX's Avatar
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    Just discrete inputs, the cannot measure between 0 and 12V (4.5V, 7.8V etc), however, they are handy for measuring relay states (on/off) or switches etc.

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

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    Ok, thanks Ross

    So this might be used to log something like a nitrous solenoid to see when it turns on/off?

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    Hi, I'm wondering if it is bad on the flashscan to input 12 volts to one of the inputs to log actual nitrous activation from the solenoid. I know it won't read the voltage. I just want to use it more as an on-off way of logging the nitrous activation point. Thanks a lot!

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    I have a v1. I don't know if that makes any difference

  7. #7
    Lifetime Member TAQuickness's Avatar
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    you do not want to hook 12vdc to the V1 inputs. You would need to step the voltage down to a 0-5vdc range.


  8. #8
    Lifetime Member Beer99C5's Avatar
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    Now that I got bottle pressure, fuel pressure and WB logging, I want to use these these relay inputs to indicate stage one and stage two of my nitrous system firing... How do I wire them (I am in Singapore so I cannot look at the back of the unit to figure it out...)

    Being we don't need the grounds on the plugs for the Fuel/nitrous/ and WB inputs, can I just take a hot feed (from my LED Stage Indicators Powered by Pin 87 on the relay) and put that to + on the V2 relay inputs and be off and rockin???
    Last edited by Beer99C5; November 21st, 2007 at 06:43 PM.
    1999 C5 A-4 Convertible
    1 of 245 Nassua Blue 99 Vert's, Blackwing, LS6 Intake, 42 # Injectors, Two Stage Nitrous System- Dry and a Wet Plate, EFI Live Scan/Tune V2, 1999 PCM with 2002 COS 5 OS Custom Nitrous Panel.


    Maine USA



  9. #9
    Lifetime Member Beer99C5's Avatar
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    Playing around I was expecting to see it come up as a STATUS when selected as PID...but it does not, has anyone used this yet???
    1999 C5 A-4 Convertible
    1 of 245 Nassua Blue 99 Vert's, Blackwing, LS6 Intake, 42 # Injectors, Two Stage Nitrous System- Dry and a Wet Plate, EFI Live Scan/Tune V2, 1999 PCM with 2002 COS 5 OS Custom Nitrous Panel.


    Maine USA



  10. #10
    Lifetime Member Garry's Avatar
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    Quote Originally Posted by TAQuickness
    you do not want to hook 12vdc to the V1 inputs. You would need to step the voltage down to a 0-5vdc range.
    Easiest way to do this would probably be getting a Zener diode, e.g. 4.7V, and a resistor ...
    Garry Glendown * '17 Fifty 2SS MT * 99 Firehawk Convertible (for sale)

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