Last post on May 24, 2013 at 10:37 AM
You are in the Pontiac Grand Am
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.
Mar 24, 2012 (8:23 am)
i have read other forms and they say you cant use one out of a junk yard because the vin and mileage will be different and supposedly they cant reprogram it
#1130 of 1227 Security light on solid
Mar 24, 2012 (2:09 pm)
I know this has been talked about many times but I am hoping to find something conclusive cause the guessing isnt getting me anywhere.
I have a 2002 grand am. I have done the resistor method fix. I have installed a 2.2k resistor up near the ignition switch and have measured that resistance between BCM connector pins A6 and B6 so I know the resistance is being seen all the way down the harness to the BCM.
The car starts no problem, and am at a loss how to get the system to relearn. many people talk about 10 minute and 30 mintute reset, but if the car starts, im not sure how this would be done.
both methods imply that the security light will be blinking.
I did test the resistance off the cut yellow wire on the ignition side and it measure 3.3k, but have read that 2.2k would be a fine selection for resistor.
There are no codes read from the OBDII and all other BCM functions are working from what I can see. Inside the bcm all is clean and no sign of water or other corrosion
Is there a way to get a running car to do a relearn and get the darn security light to turn off other than ripping it out lol.
Please, only reply if you know something to be true and not from untested hearsay.
Thanks to all
#1131 of 1227 Re: Security light on solid [dcheitel]
Mar 24, 2012 (4:54 pm)
Here is the complete text of the procedure you are looking for, right out of the GM Service Manual.
PROGRAMMING THEFT DETERRENT SYSTEM COMPONENTS
* The Body Control Module (BCM) must be programmed with the proper RPO configurations before performing learn procedures. Refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.
* If replacing the BCM with a GM Service Parts Operations (SPO) replacement part, the module will learn Passlock sensor data code immediately. The existing PCM however, must learn the new fuel continue password when the BCM is replaced.
* If replacing a PCM with a GM Service Parts Operations (SPO) replacement part, after programming, these modules will learn the incoming fuel continue password immediately upon receipt of a password message. Once a password message is received, and a password is learned, a learn procedure must be performed to change this password again. A PCM which has been previously installed in another vehicle will have learned the other vehicle's fuel continue password and will require a learn procedure after programming to learn the current vehicle's password.
Use these procedures after replacing:
* Passlock Sensor
10 Minute Learn Procedure
* Tech 2
* Techline terminal with current SPS (Service Programming System) software
1. Connect the Tech 2 to the vehicle.
2. Select "Request Information" under "Service Programming".
3. Disconnect the Tech 2 from the vehicle and connect it to a Techline terminal.
4. On the Techline terminal, select "Theft Module Re-Learn" under "Service Programming".
5. Disconnect the Tech 2 from the Techline terminal and connect it to the vehicle.
6. Turn ON the ignition, with the engine OFF.
7. Select "VTD Re-Learn" under "Service Programming".
8. Attempt to start the engine, then release the key to ON (vehicle will not start).
9. Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF. The vehicle is now ready to relearn the Passlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK.
10. Turn OFF the ignition, and wait 5 seconds .
11. Start the engine. The vehicle has now learned the password.
12. With the Tech 2, scan tool, clear any DTCs.
30 Minute Learn Procedure Tools Required: None
1. Turn ON the ignition, with the engine OFF.
2. Attempt to start the engine, then release the key to ON (vehicle will not start).
3. Observe the SECURITY telltale, after approximately 10 minutes the telltale will turn OFF.
4. Turn OFF the ignition, and wait 5 seconds .
5. Repeat steps 1 through 4, 2 more times for a total of 3 cycles/30 minutes . The vehicle is now ready to relearn the Passlock Sensor Data Code and/or passwords on the next ignition switch transition from OFF to CRANK. IMPORTANT: The vehicle learns the Passlock Sensor Data Code and/or password on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.
6. Start the engine. The vehicle has now learned the Passlock Sensor Data Code and/or password.
7. With a scan tool, clear any DTCs if needed. History DTCs will self clear after 100 ignition cycles.
Note that some of this is not necessary unless you replace either the BCM or the PCM. Also, the procedure calls for using a Tech II scan tool, and a Techline terminal. These are sometimes necessary in order to put the BCM into the "Theft Module Relearn" mode. (Please note: No GM dealers know how to do this. If you take your car to a shop that has a Tech II scan tool and a Techline Terminal, be sure to print out these instructions and take them with you, and tell them exactly what you want done, pointing out the steps in the manual)
Dick B (retired)
General Motors Proving Ground
#1132 of 1227 Re: Security light on solid [lovemygrandam]
Mar 24, 2012 (9:04 pm)
I have seen this before but in my situation step number 2 of the 30 minute process doesnt coincide because the vehicle does start.
if I turn to crank and the vehicle starts how can i proceed without shutting the car off?
#1133 of 1227 Re: Security light on solid [dcheitel]
Mar 27, 2012 (11:10 am)
Yours is one of the situations where you will need the Scan tool and the Techline Terminal to put your vehicle into the learn mode. If your vehicle starts after the first 10 minute learn cycle, but the Security light is still on solid, there is a possibility that the PCM already knows the code word sent by the BCM.
This is pure speculation, but someone told me that you can trick the system by going to the Under Hood Fuse Box and pulling Fuse #18 (fuel pump). I would imagine you must put it back in once you have started the third learn cycle. I haven't had the opportunity to try this, since each time I did the resistor fix, the lamp extinguished and the vehicle ran after the 10 minute relearn. (about 12 vehicles so far)
#1134 of 1227 Re: passlock problems [curlylocks1014]
Apr 15, 2012 (10:39 am)
the reason why you might be having that problem is because your key don't have a chip on it so the system sometimes bypass the chip and start but you do need that chip so you won't have that problem no more
#1135 of 1227 Re: passlock problems [omarbrooks]
Apr 16, 2012 (11:25 am)
Passlock II does not use a smart key. This is stated in your owner's manual.
Apr 17, 2012 (9:49 am)
Yesterday I went to start my 2001 Grand AM GT and for starters the key fob would not open the doors. When trying to start the car it would crank over and start for aprox 2 seconds then shut off. The security light is on the whole time (not blinking). I tried letting the key set in the ACC position as well as the ON position- both for 15 min and neither worked. What else can i do? Any help would be appreciated.
Apr 18, 2012 (3:36 pm)
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:
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.)
Engineering Staff (retired)
GM Proving Grounds