Passlock System

[smokeymo]

I didn't check the resistance. a post earlier said that a 2.2K would be fine.
To update..I had the car towed to an auto electric shop and they told me that they disconnected the bypass that was installed when I had a remote start installed about 10 years ago because it had failed. They recommended a bypass module be installed. The shop said that the car would start now with the key but if I used the remote the car would act as though the anti-theft was engaged. Well I used the remote start and let it run for about 15 minutes then the car shut down as it reached the proper temp. I then used the remote start again again, then went out for a short ride and the car ran fine. Does trhis resistor mod as is work with a remote start or is more work required?

[sykander]

The bypass is used to "trick" the bcm with the resistor, with this resistor "permanent" you will not need a bypass anymore, just your remote starter only, doesn't need to reinstall a new bypass module for your remote starter, just calculate of find the resistor value, put it on between the cables and the light will go off and you can use your remote starter also, i've done this mod a 4 months ago and forgot about the problem.

[smokeymo]

OK...I just had a look and the shop removed the resistor I put in and put the wiring back to original. So what went wrong with my mod ? It was a 1.5k resistor I used. I cut the yellow wire while the car was running, and soldered the resistor to the half leading to the ignition switch and the other end of the resistor to the stripped black wire. I put a shrink tube on the loose end of the yellow wire. The theft light remained on for a few hours but was out the next day when I drove it. It started for 2 days and then quit. I thought once I cut the yellow wire the anti-theft was disarmed. The only reason for the resistor was to keep the light out. Right ??

[sykander]

That's because you don't check the resistor value before put the new resistor between the cables, also, the resistor needs to be in the yellow cable going to the bcm and the black (gnd) cable, yellow cable for lock cylinder need to be isolated, please check your lock cylinder resistor value and put an equal resistance, that disable your anti-theft system and turn off the light all the time, also you can use your remote starter again, no bypass needed.

[BooPassLock]

Hello. I am here to share my passlock horror story. My car started doing the no start with the security light flashing about 6 months ago. I do the relearn and it works for a while. Then it gets to where I am doing the relearn for every start and finally no start at all. I search the net looking for answers and found that this is a common problem with gm vehicles.

I read about the resistor trick and was ready to try it when I started reading that it is only a temporary fix. Another part of the system like the bcm could fail and then the car would stop starting again. This bummed me out.

Next I started to look for a permanent fix and I found a bypass on this site
How to disable and remove VATS, PASSKey and Passlock Security Systems in GM cars

I don't really know much about cars but my friend who installs car stereos put it in for me and it started right up. I couldn't believe it. I don't know if there are better devices out there but I know this one worked for me. I even picked up an 02 Alero that wouldn't start for 800, put the bypass in and it worked on that one too. I gave it to my niece. Anyway just thought I would share a fix I know works. Hopefully this helps.

[aleekat]

Originally Posted by sykander

That's because you don't check the resistor value before put the new resistor between the cables, also, the resistor needs to be in the yellow cable going to the bcm and the black (gnd) cable, yellow cable for lock cylinder need to be isolated, please check your lock cylinder resistor value and put an equal resistance, that disable your anti-theft system and turn off the light all the time, also you can use your remote starter again, no bypass needed.

This works. Did this method on a 95 cutlass. Cost was all of $2 for resistors(had to buy a 4pack, didn't have just one) from radio shack. Over a year ago and not one no start.

[sallycooper296]

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[car2n]

Hi 3 days ago I ran into the well known problem of the pass lock system, it took me one day to know my injectors were not pulsing and it was the anti theft, I had my 2004 Classic for about 5 years with no issues until now, while searching I found this thread which lead me find how to re-start my car, thanks to this thread I was able to get it running, I almost read the whole thing but now that the car is running wonder what will be the best solution in the long run, the yellow splice wire, the cut off switch the resistor way or getting a by-pass module, please advice.
By the way I disconnected my battery for one day and I was able to reset the key thing for the 10 min. period.

[GOOFY BRIAN]

I recently replaced my ignition switch on a 2003 malibu and i can not seem to get rid of the theft system light. Other sites have said turn car to on wait for theft light to go off then turn car off turn back on and it should start. My problem is that the light will not go off after waiting 10-15 minutes like they say... Any help would be greatly appreciated

[GOOFY BRIAN]

I could really use some help with my car

[ponchonutty]

Originally Posted by GOOFY BRIAN

I could really use some help with my car

Well, first I would like to know why you replaced the switch. Were you having security issues before? If so, you will still have issues anyways.

If you want to try and get this light out, unhook the battery for several hours to completely drain the voltage out of the system. This will cause the BCM to reset which will make it forget it was in "fail/enable" mode of which it is in that now. When you go to start it, it may start for a second then stall and that light will be flashing. If so, leave ignition on for 10 minutes or until that light goes out. Then, shut it off and count to 3 then try to restart. If it still fails to start, repeat above.

If it still fails to start then you must either change out PK2 decoder system or do my bypass method which you will find if you search on here.

Good luck!

[ShadeTreeJack]

I replaced mine because the key wouldn't turn. While waiting for the new part to ship, I spent several hours trying to get it to turn. Since replacement ( about two years ), it has set the fault about three times. 10 minutes with key on usually works. Spec says you need to cycle through that 2 times. found that once works because my daughter tried it.

GOOFY BRIAN - I did one in an Impala; I had to key-on for 10 minutes / for 3 seconds 3 times WITHOUT trying to start it. I think I found that here in automotiveforums

[knilive2]

I have 1998 Malibu with a 3100 v6 with 300,000 miles I've had problems with my theft system for years . Finally I installed a toggle switch to the yellow wire behind the ignition while the car was running. It work up until now about 2 years later. The theft light goes off but blinks when I attempt to crank it then cuts off. My car cranks then cuts off. It maybe cranks for a few seconds then cuts off. The theft light blink then cut off. Please help, been trying to get this crank for maybe 3months. My theft system always acts up when it gets cold. I made a post on this at the same time a few years ago before I install the toggle switch.

[Tech II]

There is only one problem with this once you install the system with the toggle switch......if for any reason, you disconnect the battery, lose battery power, or someone accidentally flips the switch before starting, you have set the disable code, and now the vehicle won't start.....

The better strategy would be to use the resistor installation instead of the toggle switch.....

The toggle switch method will only work, if you can get the car started again, and then toggle the circuit open, causing the theft light to come on steady again....

So close the toggle switch, and do the 10 minute relearn procedure three times and see if the vehicle starts....if it does, the theft light will go out... with the engine running, now flip the toggle switch to open the circuit, and the theft light will remain on and should restart again when you shut it off....

[ponchonutty]

Ditto what Tech2 says. Who ever came up with the toggle switch idea to bypass these systems should have kept that info to themselves.

With the switch closed, I doubt it at this time the car will sucessfully go through the relearn with 300k miles on the clock. I bet the PK2 system is completely worn out. Only fix would be to replace that or resistor trick. If you do the resistor trick then just do the relearn and you should be OK. Look up my post on here on how to bypass passlock. Go to the last page for instruction.