viper dei auto start confirmation?
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=104939
Printed Date: April 30, 2024 at 1:34 AM
Topic: viper dei auto start confirmation?
Posted By: wungun
Subject: viper dei auto start confirmation?
Date Posted: May 23, 2008 at 9:55 AM
Does anyone know if the Viper has a pulsed output confirmation when (after) the car is successfully autostarted? I lost my manual and I can't find one online... It's the 791 model Viper BTW Thanks
Replies:
Posted By: Big Dog
Date Posted: May 23, 2008 at 1:58 PM
If I understood correctly, you're looking for a ground pulse after a sucessful remote start. That's the GREEN / WHITE (factory alarm arm) wire.
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Prepare your future. It wasn't the lack of stones that killed the stone age.
Posted By: techman93
Date Posted: May 23, 2008 at 2:54 PM
That GREEN / WHITE wire pulses negative when remote start has turned off after preset run time to rearm alarm or when you hit the lock button on remote, I don't believe you can use that for what you are asking.
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The wire I'm test'n isn't doin' what it's supposed to be doin'... I am so glad I printed that tech sheet, with the wrong info.
Do it right the first time... or I might have to fix it for ya
Posted By: Big Dog
Date Posted: May 23, 2008 at 3:06 PM
I didn't quite understand.  In that case, use the RED / white and program for defrost, pulse. It'll pulse 10 seconds after a sucessful remote start. ------------- Prepare your future. It wasn't the lack of stones that killed the stone age.
Posted By: techman93
Date Posted: May 23, 2008 at 7:09 PM
You are referring to a 200ma (-) trunk release output on channel 2 that is RED / white. I think you are thinking of the blue/white wire for 2nd status/rear defogger.
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The wire I'm test'n isn't doin' what it's supposed to be doin'... I am so glad I printed that tech sheet, with the wrong info.
Do it right the first time... or I might have to fix it for ya
Posted By: wungun
Date Posted: May 23, 2008 at 11:09 PM
10 seconds is too lengthy for what I need...the Viper is going to close a latch relay. After which, it doesn't need to be energized (immediately) after the car starts... Because of the way my latch relay works, if I were to 'unlatch' it (with reverse polarity on BOTH ground and positive) I'd short it out or pop a fuse with the Viper still supplying current to it... I need the Viper to latch the relay when the car starts (I'm actually using the acc./ign. out from the relay pack to do this), and then de-energize immediately after the engine starting... That way I can safely 'unlatch', or switch off the engine right away if need be...
Posted By: Big Dog
Date Posted: May 26, 2008 at 10:14 AM
techman93 wrote:
You are referring to a 200ma (-) trunk release output on channel 2 that is RED / white. I think you are thinking of the blue/white wire for 2nd status/rear defogger.
I've inhaled too much solder fumes.  wungun, I thought your original post was a pulse after the car was sucessfully started, however, your ignition signal comes on before it even cranks. Also, the purple is simultaneous with the crank, it won't pulse after the car has sucessfully started. BTW, the blue/white defrost isn't a pulse 10 seconds in length, it pulses for one second which is sent 10 seconds after the car is started. But I guess you know what your looking for. ------------- Prepare your future. It wasn't the lack of stones that killed the stone age.
Posted By: chriswallace187
Date Posted: May 26, 2008 at 12:57 PM
wungun, what exactly are you trying to do with this latch relay? Post what you're specifically trying to accomplish and we might be able to come up with a better way.
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C Renner's Auto Electronix
My service is cheap, quick, and good - pick any two
Posted By: wungun
Date Posted: May 26, 2008 at 7:03 PM
Okay, I drew up a schematic...here it is (Both start and stop buttons have double switch contacts) 
Here is how it's s'pose to work... I have a timer I bought, programable. I'll set it for 4 or 5 seconds... Now, I have a start and a stop button. The Viper is looking for 2 ground pulses to start the engine-start sequence. Once it see the pulses, it begins by flashing the parking lights and powering up the Acc and Ign... The Acc (or Ign) is spliced into the latch and a ground relay (the latch needs both + and - to close...and reverse polarity to unlatch) Once the Acc is powered up, the timer is triggered and it begins it's count-down...4 or 5 seconds should be enough of a wait for the starter to engage and start the car... Once the timer lapses, it sends a pulse to the auto starter kill (normally hooked up tp the brake pedal)... Now drive the car away! Now if I need Acc and Ign WITHOUT starting the car, I push and hold the the start button for the 4 or 5 seconds needed for the timer to send a pulse... The + output from the timer goes into the same latch and ground relay that the Viper triggers...which closes the two relays for Acc and Ign...but this time, the auto-start sequence isn't triggered because the Viper didn't "see" 2 pulses... The only problem I (a novice) can forsee, is if the 'stop' button is pressed while the latch is being closed, it's an obvious short... This is why I need the timer to trigger off the auto start ASAP... Also, I was thinking about adding a switch to the Ign relay, this way I can have just Acc on without Ign if need be (i.e. drive-in theater, etc...) I think I'll put a small capacitor in the trigger-in lead, this way, there isn't a feed back 'loop' into the timer... Also, a diode so when Acc is energized, it doesn't immediately trigger the auto-start disengage... Let me know if you guys think this will work...I'm pretty new at this... Thanks for your input
Posted By: chriswallace187
Date Posted: May 27, 2008 at 1:22 AM
I think you're overcomplicating things a bit...what you're trying to do is have a switch like a late model car with a proximity key, correct?
Easier way to do it would be just to have the first pulse go to the Viper's (-) activation input, and also latch a relay setup that would ground the wait-to-start input to the Viper. The second pulse would unlatch that relay setup, causing the car to start and run.
More info to follow...hot date with Ms. Pillow right now.
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C Renner's Auto Electronix
My service is cheap, quick, and good - pick any two
Posted By: wungun
Date Posted: May 27, 2008 at 9:52 AM
chriswallace187 wrote:
I think you're overcomplicating things a bit...what you're trying to do is have a switch like a late model car with a proximity key, correct?
Easier way to do it would be just to have the first pulse go to the Viper's (-) activation input, and also latch a relay setup that would ground the wait-to-start input to the Viper. The second pulse would unlatch that relay setup, causing the car to start and run.
More info to follow...hot date with Ms. Pillow right now.
Hey, I like the idea of simpler! Looking forward to what you have in mind...
Posted By: wungun
Date Posted: June 02, 2008 at 5:01 PM
Anyone else wanna confirm the validity of my schematic? Will it work? Is there a better way?
Posted By: wungun
Date Posted: June 06, 2008 at 4:43 AM
Nobody chiming in?
Posted By: Big Dog
Date Posted: June 06, 2008 at 7:56 AM
If I understand correctly, you want to activate ACC and IGN without using the key. All you need is one toggle switch and two diodes. Using the 4 pin aux connector on the XCRS relay pack (contains a blue, pink, orange, purple). Connect a diode with anode towards XCRS on the small pink wire. Connect a diode with anode towards XCRS on the small orange wire. Connect cathodes (stripe on diode) of both diodes to a SPST toggle switch. Connect other pin of SPST to ground. Flick switch ON for ACC and IGN to be activated. Also, you may substitute the SPST with an AUX channel of the 791. Program AUX for latch. May the force be with you. ------------- Prepare your future. It wasn't the lack of stones that killed the stone age.
Posted By: wungun
Date Posted: June 06, 2008 at 3:21 PM
Big Dog wrote:
If I understand correctly, you want to activate ACC and IGN without using the key. All you need is one toggle switch and two diodes. Using the 4 pin aux connector on the XCRS relay pack (contains a blue, pink, orange, purple). Connect a diode with anode towards XCRS on the small pink wire. Connect a diode with anode towards XCRS on the small orange wire. Connect cathodes (stripe on diode) of both diodes to a SPST toggle switch. Connect other pin of SPST to ground. Flick switch ON for ACC and IGN to be activated. Also, you may substitute the SPST with an AUX channel of the 791. Program AUX for latch. May the force be with you.
That's good and all, but I'd like to have a little bit of security built into it as well... I was thinking having the output of the start button go thru the ign disable relay, so when armed, the button is functionless... And the start as well as the IGN + ACC only fuction need to be from one button...
Posted By: wungun
Date Posted: June 19, 2008 at 11:03 PM
Maybe I can hook up the stop button to the auto start disable lead, BUT put a capacitor on the connection to the latch, this way I'm sure the latch isn't still energized 'closed' from the Viper before I unlatch it? Simple enough...
Posted By: wungun
Date Posted: June 20, 2008 at 9:07 AM
Like so.... 
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