Use the VDC button to arm nitrous?
#1
05-26-2005, 04:19 PM
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Use the VDC button to arm nitrous?
Would it be possible to use the VDC button as a relay trigger to arm a nitrous system? I wouldn't want VDC active with nitrous, so it seems like it could be a stealthy way of arming a nitrous system. Since the VDC button is a momentary button and not a single-pole-single-throw button, I'm not sure how I could use it as the trigger voltage for a solenoid. Anyone have an idea how this could be done?
#2
05-26-2005, 05:17 PM
#3
05-27-2005, 12:08 AM
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#4
05-27-2005, 09:14 AM
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Both good points...I'm trying to balance stealth while not hacking up the car and also providing a degree of accessibility. I hit the VDC button so often that I can do it without even looking (and I haven't accidentally opened the trunk yet 
). Also, I will definitely add another switch to act as a master arm/disarm that is out of the way so I can disable the nitrous for the wife, valet, etc.
I will probably just hide a SPDT switch somewhere, but now that I've been thinking about it, I'm really curious how that VDC switch could be used to trigger a solenoid--any electronics guys out there want to chime in?
). Also, I will definitely add another switch to act as a master arm/disarm that is out of the way so I can disable the nitrous for the wife, valet, etc. I will probably just hide a SPDT switch somewhere, but now that I've been thinking about it, I'm really curious how that VDC switch could be used to trigger a solenoid--any electronics guys out there want to chime in?
#5
05-27-2005, 02:07 PM
You may run in to major issues trying to use the VDC button as a relay trigger.
The switch logic itself is 5vdc, so you would need a special relay off of the bat. It switches to ground when you push it. So, you would have to hook your relay coils ground terminal to the switch side of the VDC button. However, whenever the vehicle is in the ACC position the BCM input line is held LOW!!! I'm not sure if there would be enough ground current to activate your relay (and your type of relay would make a HUGE difference). However, if its NOT enough current you could cause damage to your BCM by trying to source (-) current from it.
You would be best off coming up with some other solution for your button.
An alternative would be rewiring the VDC system all together. With a combination of bits and pieces I'm sure you could multiplex the button to perform more then one task, depending on how many times you push the button, or how long you hold it down....
The switch logic itself is 5vdc, so you would need a special relay off of the bat. It switches to ground when you push it. So, you would have to hook your relay coils ground terminal to the switch side of the VDC button. However, whenever the vehicle is in the ACC position the BCM input line is held LOW!!! I'm not sure if there would be enough ground current to activate your relay (and your type of relay would make a HUGE difference). However, if its NOT enough current you could cause damage to your BCM by trying to source (-) current from it.
You would be best off coming up with some other solution for your button.
An alternative would be rewiring the VDC system all together. With a combination of bits and pieces I'm sure you could multiplex the button to perform more then one task, depending on how many times you push the button, or how long you hold it down....
#7
06-02-2005, 10:58 PM
you should be able to do it. Having a hidden arming for N2O is the way to go.
In my old explorer V8 AWD, I had a hidden arming switch, and I used the rear defroster buttom to turn on the bottle heater. Also, when the nitrous was armed, the rear windshield wiper/spray button disabled. It would switch (through relays) to be the purge button. When the nitrous was disarmed, all the buttons went back to normal use. It was very trick!!!
Especially, when you consider the images on those buttons. The defroster button had an image of a heater. Also, the spray/wiper button image looked like a purge of nitrous being sprayed. Those buttons worked well for my system.
In my old explorer V8 AWD, I had a hidden arming switch, and I used the rear defroster buttom to turn on the bottle heater. Also, when the nitrous was armed, the rear windshield wiper/spray button disabled. It would switch (through relays) to be the purge button. When the nitrous was disarmed, all the buttons went back to normal use. It was very trick!!!
Especially, when you consider the images on those buttons. The defroster button had an image of a heater. Also, the spray/wiper button image looked like a purge of nitrous being sprayed. Those buttons worked well for my system.
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#8
06-03-2005, 09:22 AM
Well, if you use a 'hidden' arm switch you would be able to easily incorporate relays to use almost any button you want to use for anything you want to use it for.
But, to use the VDC button as the 'hidden' button I would strongly recomend against that. The BCM does some funny things on the input line, like I stated above, and we have had several issues tying in to it. But, with our products, we can use software filtering to get around the funny things the BCM does...
But, to use the VDC button as the 'hidden' button I would strongly recomend against that. The BCM does some funny things on the input line, like I stated above, and we have had several issues tying in to it. But, with our products, we can use software filtering to get around the funny things the BCM does...
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