Passlock System

[ponchonutty]

No. Once the PK2 system has been tripped by not seeing the correct resistance, the only way to get it to start is to get the proper resistance OR pick a resistance code out and relearn it to the BCM.

[usmailman956]

My o3 malibu has the passlock and the theft deterent light comes on whenever it wants to while driving so far only refused to start once had to reset system 10 minutes with key on and then turn off and start car. The light stayued off for several days aftyer that now it comes on every day while driving any suggestions. Do not want a light on dash as my daughter drivers this car sometimes and would freak out

[ponchonutty]

Yep, do the toggle switch or resistor trick that's been mentioned on here a lot!!!

[8800taxi]

I have 2001 impala with the same problems about a year ago. I added the toggle switch and the procedure worked great. The car sat for a couple of months and ofcourse the battery died, i charged the battery and now im having the same problem again. I try to start it but nothing happens even with the toggle switch in the off or on position. The information center on the dash does not work , the interior lights and radio dont work it seems like im only getting partcial power because the windows seem to be working. When I turn the key i can hear the fuel pump working and a clicking noise coming out of the fuse box located on the driver side of the dash.

[ponchonutty]

That sounds like either a bad ignition switch or even a bad BCM which both are very common.

[Malibu_Newbie]

Ok I am rereading this for about the 8th time rcking my brain on how to get my car back to running without going to the dealership. I did the bypass back in Jan.-Feb. but I did not do a toggle switch or resistor I just cut and taped the wires. Which worked great until my battery died (not sure why it died). Now the car with not crank at all. The dealership said that its in failsafe mode and thats 70 to fix not including towing charges. So I am trying to come up with ideas on how to fix this at home and save some money.

Here is what I have tried so far. The key to ACC for 11 mins x 3. But after reading futher I read it is suppose to be to the ON position for 11 mins x 3. So I will give that a try. I have a new battery and a speed charger so that should not be an issue.

I tried reconnecting the yellow wires and still nothing.

I am sure there are other I have tried but I am not drawing a blank. SO does anyone know of anything else that might work. Like is there a typical range of resistor values for the anti theft that I could try to get the car to crank. Or at least make an attempt to crank. Anything to let me know that I am on the right track. Or is my only option going to the dealership (or anyone else that can reprogram the bcm whatever) and getting this reprogrammed. Is there no way to get the codes back without going to a garage to get this to work.

I have a 98 Malibu LS V6. No other issues other than this.

[MT-2500]

Any remote start stuff on it?
Remove toggle switch and put it back to OEM set up.
Then try relearn.
The relearn is as follows.
Clear all codes with a scanner.
Turn key on until security light goes out about 10 minutes.
Turn key back off and then on for a while and it should relearn and start.
If security light stays on after the last key on or no start
See what code the scanner resets.
And post back code.
MT

[Malibu_Newbie]

Originally Posted by MT-2500

Any remote start stuff on it?
Remove toggle switch and put it back to OEM set up.
Then try relearn.
The relearn is as follows.
Clear all codes with a scanner.
Turn key on until security light goes out about 10 minutes.
Turn key back off and then on for a while and it should relearn and start.
If security light stays on after the last key on or no start
See what code the scanner resets.
And post back code.
MT

Well my coder has not pulled up anything at this point. The wires are already back together. How many times should I turn it on for?

Oh meant to add no remote starters on the car. I just did the bypass when I was having issues with the passlock.

[MT-2500]

Originally Posted by Malibu_Newbie

Well my coder has not pulled up anything at this point. The wires are already back together. How many times should I turn it on for?

Oh meant to add no remote starters on the car. I just did the bypass when I was having issues with the passlock.

Have you removed the bypass and put it back OEM?
Have you cleared codes and see if any returns?
Reread my first post on the relearn for it.

Tell us if the security light goes out after key on bulb test or just stays on.
MT

[Malibu_Newbie]

Originally Posted by MT-2500

Have you removed the bypass and put it back OEM?
Have you cleared codes and see if any returns?
Reread my first post on the relearn for it.

Tell us if the security light goes out after key on bulb test or just stays on.
MT

There are no codes when I use my code reader. I will try the relearn again (this time in the ON position and not ACC) tomorrow. My speed charger is in the husbands truck and I don't wanna kill the battery. Right now its back to being enabled. So no the light is not on. Just won't crank. Heck it does not even try to turn over. Yet everything inside the car works.

[ponchonutty]

Well you've had the security light on for some time before and that's why you tried the bypass correct? Yes, cutting the yellow wire in 1/2 will put the car into fail-enable mode which you've found out. But, when you have to either jump the car or install a new battery the BCM resets. Now it won't start. Putting the yellow wire back together would work but only if the ignition decoder is working and it may not be.

If you need a resistance code I just did a bypass on a 2002 G-am yesterday. I put a 5320 ohm resistor on the cut end of the yellow wire going to the BCM and attached the other end to the black reference wire and also put a jumper from the black wire to chassis ground (because I have a feeling that's an issue too) Then I only had to keep the ignition on for 11 minutes and the light stopped flashing and went solid and the car started. Sometimes it take 2 or 3x though.

[Malibu_Newbie]

Ok I just did the relearn thing (ON for 11mins x3) nothing. I hear I guess the fuel pump kick on but no turnover. I guess I am to the point to try the resistor trick and then relearn or it has to go to the shop. Because I can not think of anything else to try.

If I try to crank the car (all the way to start position and let it fall back to off) the light goes off.

I will try and see if there are any codes when hubby gets home. But thus far there has not been any codes to pull so I doubt there will be one with our code reader.

[Malibu_Newbie]

BTW where is the BCM located at and does it have a fuse or relay that goes with it.

[MT-2500]

The relearn procedure is not key on three times.
The anti theft or security system does not shut down the engine starter.
If light comes on key on and then goes off ther anti thef should be working.
If engine does not crank over you have a starter or switch or battery problem.
MT

[Malibu_Newbie]

Originally Posted by MT-2500

The relearn procedure is not key on three times.
The anti theft or security system does not shut down the engine starter.
If light comes on key on and then goes off ther anti thef should be working.
If engine does not crank over you have a starter or switch or battery problem.
MT

The dealership meachinic (sp) said that this particular security feature shuts down the starter etc. and that I have to get something reprogrammed to get it to work again. I have called several garages in the past few days and they call confirm the same thing.