bypass aftermarket immobilizer r/s

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jsolts

Member - Posts: 49

Joined: October 10, 2011

Location: Manitoba, Canada

Posted: September 27, 2012 at 6:03 PM / IP Logged

Up here in the great white north, our insurance company makes it mandatory to install aftermarket immobolizers in certain makes and models.

These immobolizers work with a transponder keytag and a loop placed around the ignition.

No Tag, No Start.

From what i have gathered the aftermarket immobolizer disables both the fuel pump and the starter.

I have been told that you can bypass this for remotestart purposes with relays, but i dont know much more than that.

Anyone firmilliar with these and could provide assistance in how to bypass this so i can use a remote start.

Thanks in advance.

offroadzj

Gold - Posts: 2,043

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Joined: June 03, 2005

Location: New York, United States

Posted: September 27, 2012 at 6:32 PM / IP Logged

My assumption is that the immobilizer system uses relays to disable the fuel pump and the starter. If you can duplicate the signal (+/-) that activates these relays, you can then use the ground when running output of the remote starter to activate that relays to reconnect the vehicle.

If you have any type of diagram or rough idea of how the immobilizers work, please post it so we can get a better understanding.

Kenny

Owner / Technician

KKD Garage LLC

Albany, NY 12205

auto enhancers

Copper - Posts: 203

Joined: April 09, 2012

Location: Indiana, United States

Posted: September 28, 2012 at 12:03 AM / IP Logged

Also we are going to need the pedigree information year make model.

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jsolts

Member - Posts: 49

Joined: October 10, 2011

Location: Manitoba, Canada

Posted: September 28, 2012 at 10:52 AM / IP Logged

This applies to many makes and models, but one of the ones im working on is a 2007 gmc sierra ext cab classic.

offroadzj

Gold - Posts: 2,043

Joined: June 03, 2005

Location: New York, United States

Posted: September 28, 2012 at 11:07 AM / IP Logged

Do you have an install diagram of the immobilizer system???

Kenny

Owner / Technician

KKD Garage LLC

Albany, NY 12205

jsolts

Member - Posts: 49

Joined: October 10, 2011

Location: Manitoba, Canada

Posted: September 28, 2012 at 1:40 PM / IP Logged

Unfortunately I don't have any type of diagram.

I'm going at this one completely blind. I located the immobolizer unit. But there is nothing written on the casing.

Sorry I can't provide anymore info at the moment. Ill tear into it later and see what info I can find.

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: September 28, 2012 at 2:04 PM / IP Logged

Hmmm maybe they should sell the English market Clifford G5 Cat 1 with twin immobiliser circuits, you then throw away that immobiliser.

In fact the US market G5 Avantguard 5.1 is effectively the same as the English 5.5 but with active rather than passive immobilisation, though you can change that.

Trouble is you probably have jobsworthys who won't allow it.

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: September 28, 2012 at 2:06 PM / IP Logged

Just another but worrying thought, if you don't know how to by-pass these with relays from the R/S GWR wire, then are you competent enough to do these installs?

jsolts

Member - Posts: 49

Joined: October 10, 2011

Location: Manitoba, Canada

Posted: September 28, 2012 at 2:33 PM / IP Logged

howie ll wrote:

Just another but worrying thought, if you don't know how to by-pass these with relays from the R/S GWR wire, then are you competent enough to do these installs?

Unfortunately i was not born knowing everything like you were.

I have done several r/s installs but have never had this issue thrown my way.

I turned to the experts for assistance, not ridicule.

I appreciate the help from all the members on the forum, but do not appreciate being ridiculed for asking for assistance.

howie ll

Pot Metal - Posts: 16,466

Joined: January 09, 2007

Location: United Kingdom

Posted: September 28, 2012 at 3:16 PM / IP Logged

Sooo easy, here you go, by the way I wasn't born that way, I just understand what you're trying to do and how to achieve an answer which took about 30 seconds to think out which is why I earn US$ 240 per day:- immob_bypass.bmp

Don't forget the 2 diodes, ign1 = live during cranking,

now here's an even easier method.

With the starter cut just take your R/S starter output to the starter side of the immobiliser:- 8A3_immob_bypass.bmp

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bypass aftermarket immobilizer r/s

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