keysense with compustar bypass
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=110367
Printed Date: July 06, 2025 at 2:30 AM
Topic: keysense with compustar bypass
Posted By: Slamminsubz
Subject: keysense with compustar bypass
Date Posted: January 05, 2009 at 4:30 PM
I just got a bunch of Compustar Immobilizer V2 Bypasses. I have never installed one before, but plenty of 556u. Only thing im confused about is wiring up the V2 to shut down once the key is put in. This 04 Escape im doing is telling me to wire up the keysence, which I usually do anyways. Any ideas?
Replies:
Posted By: Slamminsubz
Date Posted: January 05, 2009 at 5:43 PM
well after thinking about it, i know how i can do it. Wire a 5 post relay using the keysence + or - to trigger the relay keeping pin 87 open and using 87a so that it will only energize the transponder when the key is not in the ignition. Anyone know if the keysence is usually required on newer fords cause id rather not both if i don't have to.
Posted By: chriswallace187
Date Posted: January 05, 2009 at 9:58 PM
Keysense shouldn't be required to be active during remote start, no.
You've got it as far as the relay setup.
Also since you're using a key-in-the-box type bypass you could program another key just to put in there (blank generic Ford key or even a used one from a junkyard for a similar Escape/Tribute).
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C Renner's Auto Electronix
My service is cheap, quick, and good - pick any two
Posted By: Slamminsubz
Date Posted: January 05, 2009 at 10:29 PM
i understand its only required to cut out the transponder unit once the key is inserted, im just wondering if that escape requires that to happen? Cause i know not all cars do
Posted By: chriswallace187
Date Posted: January 06, 2009 at 12:08 AM
Hmm...I think I've only ever done that on an '04 Grand Prix that was being a pain.
Supposedly if the vehicle sees 2 transponders during a startup it could set a trouble code, but that's fairly easy to avoid(by simply not attempting a remote start with the bypass connected and a key in the ignition. Trouble codes like that might go away after several cycles without a fault in any case.
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C Renner's Auto Electronix
My service is cheap, quick, and good - pick any two
Posted By: Slamminsubz
Date Posted: January 06, 2009 at 1:18 AM
sounds good. ill just hook it up without it and if it turns into a problem down the road ill take care of it
Posted By: terrytcl
Date Posted: January 12, 2009 at 4:36 PM
if the escape starts up with a key in the 556u, it doesn't car that later you put in a key in the ignition cylinder. at least that's what i've noticed with the 06 escape i've been working on.
Posted By: loneranger
Date Posted: January 12, 2009 at 5:43 PM
terrytcl wrote:
if the escape starts up with a key in the 556u, it doesn't car that later you put in a key in the ignition cylinder. at least that's what i've noticed with the 06 escape i've been working on.
If there's a transponder key in the cylinder during R/S, with an active bypass, it will fault. That's the reason for disabling the bypass, with a key sense. ------------- Ideal - cmon dude, add to topics in a useful manner, not stuff that is obvious.
Story - Phzzzt! Hey, what happened?! ... Isn't it obvious?
Moral - Never dismiss the obvious.
Posted By: terrytcl
Date Posted: January 12, 2009 at 11:04 PM
not with the escape i've been working on 2006 the car won't RS if you have a key in the cylinder, but if the car is running on RS, you can put a key in and won't throw a fault. i don't have the bypass disabled with keysense.
Posted By: loneranger
Date Posted: January 13, 2009 at 3:46 AM
loneranger wrote:
If there's a transponder key in the cylinder during R/S, with an active bypass, it will fault. That's the reason for disabling the bypass, with a key sense.
I should have been more clear: If there's a transponder key in the cylinder, while cranking, during R/S, with an active bypass, it will fault. That's the reason for disabling the bypass, with a key sense.
Or: If there's a transponder key in the cylinder during R/S initialization, with an active bypass, it will fault. That's the reason for disabling the bypass, with a key sense.
Or: If there's a transponder key in the cylinder while remote starting, with an active bypass, it will fault. That's the reason for disabling the bypass, with a key sense.
------------- Ideal - cmon dude, add to topics in a useful manner, not stuff that is obvious.
Story - Phzzzt! Hey, what happened?! ... Isn't it obvious?
Moral - Never dismiss the obvious.
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