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Pontiac Grand Am Security Passlock Problems

1227 messages,  Last post on May 24, 2013 at 10:37 AM

You are in the Pontiac Grand Am Forum.

What is this discussion about? Pontiac Grand Am, Security System, Sedan

    
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    For those experiencing the security passlock problem, please see long-time member lovemygrandam's GM Security Passlock Fix tutorial.

Messages Page 115 of 123

#1137 of 1227 Re: HELP [travjenkins] by lovemygrandam

Apr 18, 2012 (3:36 pm)

Replying to: travjenkins (Apr 17, 2012 9:49 am)
You have two problems. The first is probably a dead battery in your Remote Keyless Entry Transmitter, but it could be a vehicle wiring problem. To help you trouble shoot that one, you can find a wiring diagram of the Door Lock circuits here:
http://www.bergerweb.net/graphics/BCM-Schematics3.gif
 
The keyless entry system has the following main components:
 
    * The transmitters
    * The Body Control Module (BCM)
    * The Remote Control Door Lock Receiver (RCDLR) . When you press a button on the transmitter, the transmitter sends a signal to the RCDLR. The RCDLR receives the signal and sends a class II serial data message requesting the appropriate function from the BCM. The BCM then sends the appropriate signal to the Door Lock Circuits in the doors.
You may find that you just have a loose connector on the BCM,
 
The Security Light On solid indicates a fault in your Passlock system... either a short or an open circuit. You will have to determine that by measuring the voltage between pins A6 and B6 of the center connector of your BCM with the ignition switch in the run position. If it is near zero volts, you have a short. If it is near 12 volts, you have an open circuit. It should read between 3 and 8 volts if the circuit is intact.
You will have to read the voltage by piercing the wires coming from those pins with two thin needles, and be careful not to touch the needles together. The ignition must be on, and the connector plugged into the BCM to make the reading.
 It's unfortunate, but mechanics at the dealerships don't know how to do these things. If they can't fix it by changing parts, they give up. This holds true for all auto companies, not just GM. (Don't blame the dealers.... every time a good service tech comes along, the factory steals them from the dealer.)
 
Dick B.
Engineering Staff (retired)
GM Proving Grounds
Milford, Mi.

#1138 of 1227 Re: Disable your Passlock! [pontiac4] by lardy

May 16, 2012 (5:48 pm)

Replying to: pontiac4 (Jun 20, 2007 5:00 pm)
i used the idiot proof remedy at this link:
 
http://www.bergerweb.net/PasslockFix/index.shtml
 
so far no problems.
 
i'll update if something comes up

#1139 of 1227 Security light cut engine while running by luitachris

Jun 25, 2012 (11:20 am)

I have spent an hour going through everything and I am still kind of confused. I have had the whole problem with the security light blinking and have to wait 10 minutes to start it. Today was a first though and kind of scary. I was driving and as i approached the light i accelerated a little and noticed the security light come on blinking with the oil and battery light and my engine was cut off. The radio and lights worked but I have never had this happen while driving. After 10 minutes I was able to restart it and the security light was off. After about 5 minutes it happened again but I was able to start it right back up

#1140 of 1227 Re: Security light cut engine while running [luitachris] by gmcustsvcsarah

Jun 25, 2012 (3:05 pm)

Replying to: luitachris (Jun 25, 2012 11:20 am)
Good evening luitachris,
 
What model year is your Grand Am? I would like to check my resources to see if I can provide any information.
 
Regards,
Sarah
GM Customer Service

#1141 of 1227 Re: Security light cut engine while running [gmcustsvcsarah] by luitachris

Jun 25, 2012 (4:34 pm)

Replying to: gmcustsvcsarah (Jun 25, 2012 3:05 pm)
It is a 2000 Pontiac Grand Am SE

#1142 of 1227 starting by ataylor11

Jul 10, 2012 (11:06 am)

2004 pontiac grand am. security light came on yesterday. drove just fine. was able to drive it this morning. then went back to it 4 hours later wouldnt start. checked all the fuses. check the battery. it was putting out 12.2 volts. Radio will come but then i go to crank it and it doesnt do anything.

#1143 of 1227 2002 grand am timing cahin by gulfcoastgirl

Jul 10, 2012 (1:25 pm)

I own a 2002 grand am se w/2.2 L
 
ecotec engine-- It has a timing chain, not a belt. After a lot of research on the matter, and a rebuilt engine, this is what I have learned.--There is a manufacturing defect, in that the chain is too tight and does not get enough oil. Mine broke with only 59,000 miles, and an oil change less than than 2,000 miles old. I am a careful driver, I don't race, or make jack rabbit starts. The best thing for any Grand Am owner to do is have your timing chain replaced before it breaks, and takes your engine down with it. Also, on the new timing chain, the nozzle for the oil is larger. Why hasn't there ever been a recall on this? This problem is too well known for the manufacturer not to be aware of it.

#1144 of 1227 2002 Grand Am security system by gulfcoastgirl

Jul 10, 2012 (1:40 pm)

It's me again with another tidbit for you Grand Am owners--the security system is also faulty, as well as the timing chain(on another post of mine). After many hours of research, I learned that the security system is also faulty. When my timing chain blew, and I had my engine rebuilt, I found directions on the internet on how to by-pass the security system. I had my mechanic do this, and lo and behold, my security light still stays on! Many times I have had to sit in a parking lot and wait 15-20 minutes to reset my security system before my vehicle would crank. Not to mention the several times I had my car towed to the GM dealership due ti it not starting, and they would call and say I owed hundreds of dollars, but they just didn't know why it didn't start before, but now it does. I even bought a new battery thinking that was the problem. Research "faulty security system" for your Grand Am, and see what you get. That's what I did.

#1145 of 1227 Dangerous Passlock/electrical issue by t30075

Jul 10, 2012 (8:11 pm)

I have a 04 Grand Am GT and I was driving down the street today and when my car went over a small bump in the road, the power locks and tachometer/odometer went haywire. Repeatedly locking and unlocking. Seemed to resolve itself and then about a block down the road the car completely died. No power steering, electrical, couldn't even engage the hazard lights. So then I put it back in park and restarted the car and it ran OK except it was a little rough for about a mile. Very dangerous being that this happened in the middle of the road. Wondering if it is safe to drive now. I know this has to be an electrical issue but I wonder if it could be related to Passlock. Anyone else have this issue or some advice?

#1146 of 1227 Re: Passlock problem or ignition cylinder prob? [janman90] by jlsumme

Aug 27, 2012 (1:53 pm)

Replying to: janman90 (Jan 19, 2012 2:20 pm)
I did the resistor trick and I did get the light to go out but it still not start,but I am writing this because after I did it the starter would not even crank! Same as your problem, so I turned the key to the ON position and waited about 20 minutes then it actually cranked, so the BCM or something completely stopped the cranking ability. It will still not start but at least it is cranking now.

Messages Page 115 of 123

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