Question about 2001 Saturn L-Series

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How do i bypass the passlock on my 2001 saturn l200?

I started it just fine this morning, drove a mile to the store, and shut it off. When I came out, it would not start. The dash lights are all normal, and when I turn the key, nothing. No crank or anything. I checked all of the fuses, especially fuses related to the ignition system, and even replaced all of them just to check, still nothing. I recently(4 months ago), had to replace the BCM and the driverside fuse panel. By the way it is acting, and problems that I was having with the BCM the last time, the only thing that I can figure is the passlock. I have gone down the list, troubleshooting everything I could think of, and even what I read. I know there is a temporary quick fix, will it damage anything, what is the actual method, and if this will get me by, what is the proper fix that needs to be done when I can afford to do it later down the road?

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  • Saturn Master
  • 2,224 Answers

The security light is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM. (Theft Deterrent Module) The TDM is what tells your computer that the correct key is being used and that it is "OK" to allow the vehicle to start and run. These 3 parts must be in CONSTANT communication. If the key is in the ignition, then these parts are sending important signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, (normally due to a failing/broken part) the car goes into antitheft mode. The car misinterperates this and thinks its being stolen or hotwired because it is NOT getting that signal from YOUR specific key. There is where the security light turns on and shuts down your vehicle. So basically, if that light is on, your system has some sort of failing part. This can start as an intermittent "no start", to your vehicle not running for days at a time, to the vehicle NEVER starting again. The problem is electrical and computer based, so don't count on an easy reset button, or the problem fixing itself. The hard part is isolating which part is the problem. You can spend a thousand dollars through a mechanic very easily. I have had great luck with bypassing the entire system. This way the problem will never return. It actually CAN'T ever return because it is eliminated. This can also be done yourself at a much cheaper cost. Read through this link very carefully. You'll find alot of information and pictures, along with ways to help you fix this.



http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on May 17, 2012

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: need to bypass the passlock system on my 2001 saturn sl2

well easiest way is to tape the old key near the ignition

without key you need to essentially re wire the ignition and under the hood arround the computer controlls and power supply

Posted on Jan 06, 2010

  • 2 Answers

SOURCE: Saturn L200 Passlock Problem

I have a very untechnical solution to this problem and I can't for the life of me remember where I heard it but it sure does work. Turn the igniton to ON so that the dash lights up. Eventually the others lights go out and the flashing "Securty" light stays. Keep the driver side door slightly ajar and sit and wait for that Security light to stop blink, usually 5-10 minutes. Once it stops blinking you can start your car. I can't promise that you won't have the starting problem again, but it will happen with decreasing frequency. Ultimately you need to have the passlock issue handled at a dealership. I say DEALERSHIP because it's a manufacturer flaw and they should be made aware of this issue everytime. They're also best equipped to handle it.

Posted on Aug 24, 2010

  • 73 Answers

SOURCE: 2000 Saturn SL2 - replaced ignition then BCM failed. Related?

the problem is not the bcm. the passlock security sensor is in the cylinder and housing, if the cyl and or housing was replaced the system must be relearned. if you replace the bcm you still need to relearn the system or it still will not start.

Posted on Apr 09, 2009

  • 1 Answer

SOURCE: I have a 1998 saturn

Crank sensor. My car did this forever. After spending $200 on parts it ended up being a $15 crank sensor you can change yourself.

Posted on Oct 28, 2010

  • 2 Answers

SOURCE: 1997 Saturn cranks but not fire. Replaced

replace the FCM ( fireing control module ). The base the coil packs sit on

Posted on May 26, 2010

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