Passlock System

[manicmechanix]

Originally Posted by windmaple

I know this doesn't sound 100% like the passlock system, but could anyone please shed light? Could it be ignition switch or BCM?

That's what it sounds like to me, the ignition switch or the BCM and the circuits between. It's a hard diagnosis to do without a Tech 2 and a dignostic chart.

[waldok7810]

i am having problems with my impala it will not start at times i wait 15min and than it will start. did you put in a resistor where you cut the wires. i am trying to get someone to fix my car and just want to be sure what to have them do!

[25moose]

I did the resistor bypass and the car starts. However, now with the key switch in the off position the system will go into the aux mode with the slightest bump of the key switch. If I'm not careful, the battery will go dead. Does it sound like I need a new siwtch? Should I replace the switch or the cylinder? Is it a difficult job?

Thanks

[25moose]

HELP!

I still have the problem that I described above. But, I have a worse problem. I charged the dead battery, started the car, and now I can't shift into drive. It acts the same as not stepping on the brake. Any suggestion, my problem is now getting worse by the moment.

[Ted Bundy]

I hope someone can help me on this one because I am actually working on a 2000 Buick LeSabre and not positive if I have a Passlock Problem. I parked this car a few months ago and not the engine will not crank (among other things I will detail later). I also found out that a wrong key had been used to try to start the car. I went myself to start this car to sell it the other day and the engine will not crank and I found the battery was bad. I replaced the battery with a new one and still the engine will not crank. In addition I have other things that do not work.

Electric windows
Remote keyless entry
Remote trunk releast
Button inside car to release trunk


However things like these do work:
Electric seats
Head lights
Brake lights
turn signals
flashers

The security light on the dash does come on when the key is turned on but it goes off after about 3 or 4 seconds.
I have used a wiring diagram and determined that all the fuses are in good condition and power is getting through them to the relays necessary for start. I know that voltage is getting to the PCM through the ignition switch.

Now I am at a lose. Does the passlock kill power to all the areas listed above or am I working on the wrong thing. Also, how do I reset the security system to try it.

thanks in advance

[waldok7810]

hey how did you put the resistor in do you have the steps that you did for putting in the resistor if so can you send them to me!!!!!!

[25moose]

On top of the ignition switch there are three thin wires with black friction tape covering. The wires are black, yellow, and white. Cut the yellow wire in two. Strip the insulation from the middle of the black wire but do not cut the wire. Place the red clip from a multi-tester on the yellow lead going to the ignition switch. Place the black clip on the bare section of the black lead. Try to start the car and read the resistance (mine is 557 ohms). Go to Radio Shack and get as close as you can get. I placed a 220 and 330 in series. Solder the resistor(s) between the bare section of black wire and the yellow lead that does not go to the ignition switch. Tape everything up and you should be good to go.

This is on a 2000 Malibu. I can't be sure that all are the same colors and set-up.

[waldok7810]

Originally Posted by 25moose

On top of the ignition switch there are three thin wires with black friction tape covering. The wires are black, yellow, and white. Cut the yellow wire in two. Strip the insulation from the middle of the black wire but do not cut the wire. Place the red clip from a multi-tester on the yellow lead going to the ignition switch. Place the black clip on the bare section of the black lead. Try to start the car and read the resistance (mine is 557 ohms). Go to Radio Shack and get as close as you can get. I placed a 220 and 330 in series. Solder the resistor(s) between the bare section of black wire and the yellow lead that does not go to the ignition switch. Tape everything up and you should be good to go.

This is on a 2000 Malibu. I can't be sure that all are the same colors and set-up.

thank you very much will try it and let you know how i came out!

[motherof1]

Thank You so much for this information...and ofcourse the pictures which helped (because I'm by no way a mechanic) I disabled my passlock in about 45 minutes...no toggle switch just taped the end of the yellow wire..no more real problems the lights on but atleast it starts. Thanks again!

[keveyj]

i changed the switch in my car and the car now it still won;t start and the security light stays on won;t start but turns over how can i get the car to start to do this bypass on it

[Alphabravo]

Originally Posted by keveyj

i changed the switch in my car and the car now it still won;t start and the security light stays on won;t start but turns over how can i get the car to start to do this bypass on it

The reistor bypass method mentioned earlier in this thread works like a charm. I did it to a 200 saturn Vue that wouldn't start. Just use a 2.2K resistor from Radio Shack and be sure to follow the directions exactly, especially the "relearn" procedure.

Good luck.

[Yellowdogluke]

This forum is great. I have been reading for a few days, stated at the oldest post. My car 2001 Malibu has this problem also. My theft lock light stays on and no others come on. It has been getting worse every day. It also has stalled a couple of times on the highway. This morning it would not start, usually if I fiddle with the key the dashboard light illuminate, the pump turns on and it goes. This morning no way , so I tried the 10 minute thing. The theft light stayed on and nothing. I read some where someone could get it started by turning the key on and putting it into neutral and then start it. First try worked perfectly,. I started it 4 times like that later today. Thanks for all the info. My husband love the diagrams on cutting the yellow wire, great forum, thanks everyone and we will keep reading.
Jackie

[slls]

Originally Posted by Yellowdogluke

This forum is great. I have been reading for a few days, stated at the oldest post. My car 2001 Malibu has this problem also. My theft lock light stays on and no others come on. It has been getting worse every day. It also has stalled a couple of times on the highway. This morning it would not start, usually if I fiddle with the key the dashboard light illuminate, the pump turns on and it goes. This morning no way , so I tried the 10 minute thing. The theft light stayed on and nothing. I read some where someone could get it started by turning the key on and putting it into neutral and then start it. First try worked perfectly,. I started it 4 times like that later today. Thanks for all the info. My husband love the diagrams on cutting the yellow wire, great forum, thanks everyone and we will keep reading.
Jackie

If it stalls running down the highway that's not security, you have another issue.
Glad to read the neutral start procedure worked, I might need it some day.

[MUDYMO]

After putting up with this no start issue for the past few years, I finally found this forum and took my 2001 Impala in to a mechanic that said that he has experience with fixing this pronlem. So, lastweek I took it into the shop. They got my car to "act up" and put the code reading tool on it and it came back showing that it was the BCM, so they went ahead and replaced the BCM. I was happy to drop th $450 to fix this ongoing problem. Then, 1 week later, I was shopping and came back to my car that again didnt start, same problem....waited 15 minutes, and then it started. Now, what? What do I say to the mechanic? Could it have been the BCM and the passlock system simotaneously? Did he get the wrong reading? How much more will I be in for if I also replace the passlock system? HELP!!!

[slls]

Most likely problem is the connections where the wires from the module plug into the key assy. The pins get corroded and need to be cleaned and lubed. Other ideas will be coming along.