Thread: Programming BCM

So I'm having trouble getting my GTP to switch modes. I'm thinking there's some small thing I'm messing up.

Out of the blue, my car no longer flashes the headlights and beeps the horn on the second click of the remotes' lock button.

Possible not so out of the blue- I was changing my signal flasher and accidentally unplugged the module above it in the IP. Maybe that has something to do with programming the thing?

Either way, it was suddenly not flashing or beeping.

I was able to enter programming mode and now it doesn't flash the lights but beeps the horn twice on the first click of the key fob. But try as I might I can't get it out of that mode or the previous one where neither horn nor lights are activated upon clicking the button on the remote.

Anyway, here's what I'm doing:

1. Pulling the 10 amp MALL PGM fuse in the panel

2. Inserting the key and rotating the key back toward the driver to the Accessory position

3. Clicking the Lock button on the key fob and listening for the number of chimes, which indicates which mode the vehicle is in.

4. When the desired number of chimes is observed, reinsert the MALL PGM fuse and remove the key.

Am I missing something or doing something wrong? Are the doors supposed to be shut? The owners' manual doesn't mention that, at least upon a quickie glance.

TIA,

-Jim

Anybody?

As far as I know you only push buttons on the key fob if you are trying to set it up to your car.
And it has been a while since I messed with the bcm, but I think you need to turn the key to off and open the door before you put the fuse back in. Keep the door closed during the programming process.

I just replaced the BCM in the Buick on Sunday. Followed these instructions. Car started fine afterwards but my issue was still there.

http://forums.trailvoy.com/showthread.php?t=88458

For those vehicles that use a BCM, the BCM can learn the resistance value of the existing key by using the relearn process. In order for the vehicle to start, the BCM (as well as the Passkey module in other vehicles) must identify the resistor pellet in the key, then the BCM sends a password to the PCM. If this password matches the password stored in the PCM, the system enables fuel delivery. So you can see that if either the BCM or PCM are replaced, a relearn procedure is necessary. This same relearn procedure can be used if an ignition key with a different resistance value is used to replace the existing key. Before beginning the relearn, make sure there is a fully charged battery in the vehicle, and both the BCM and PCM are properly powered up and in communication with each other. Now you’re ready to initiate the relearn procedure.

1. First, insert the ignition key and turn the ignition switch to the “On” position (Do not start the engine). Leave the switch on for 11 minutes. The security light may flash or be on steady during this 11 minute period. Make sure the light is no longer on or flashing before proceeding to #2 .
2. Turn the ignition switch off for 30 seconds.
3. Turn the ignition switch to the “On” position (as in step #1) for 11 minutes again.
4. Turn the ignition switch off for another 30 seconds.
5. Turn the ignition switch to the “On” position for 11 minutes a third time.
6. Turn the ignition switch off for 30 seconds one final time.
7. Turn the ignition switch to the “On” position one final time and wait 30 seconds.
8. Attempt to start the engine. If the engine starts and runs normally, the relearn is complete. If the engine does not start, check for trouble codes and address them before attempting the relearn procedure again.

Originally Posted by buck531

I just replaced the BCM in the Buick on Sunday. Followed these instructions. Car started fine afterwards but my issue was still there.

http://forums.trailvoy.com/showthread.php?t=88458

What is the issue? My car starts, I'm trying to program the lights and horn honking, using the instructions in the owners manual.

You asked how to reprogram the BCM..I posted a link on how to do it.

Originally Posted by buck531

You asked how to reprogram the BCM..I posted a link on how to do it.

That doesn't really pertain to what he is trying to do though.

The BCMs on these cars are a pain to change settings on.

Originally Posted by Slick2500

That doesn't really pertain to what he is trying to do though.

The BCMs on these cars are a pain to change settings on.

I understand that but the title says programming the BCM .

Originally Posted by buck531

I understand that but the title says programming the BCM .

Yes but the instructions you gave are for a re-learn.

Originally Posted by Slick2500

Yes but the instructions you gave are for a re-learn.

You are correct. I fail. Shutting laptop lid now.

Ok I read the first OP's post. The only thing I can see differently is that you should remove the key and then put the fuse back in. You said you're putting in the fuse and then removing the key? Dunno. Something to try at least.

Remove key from ignition switch
Remove the “MALL PGM” fuse from the fuse box
Close all doors
Turn ignition switch to the ‘ACC’ position
Within 1 second, turn the ignition switch to ‘OFF’ and then back to ‘ACC’
Open and close the driver’s door. A chime will sound indicating the programming mode is active.
To program the transmitter, proceed as follows:
Press and hold remote transmitter Lock and Unlock buttons until a chime sounds twice (approximately 14 seconds).
Repeat last step for each additional remote transmitter.
Remove key from ignition switch
Refit “MALL PGM” fuse

Originally Posted by buck531

Ok I read the first OP's post. The only thing I can see differently is that you should remove the key and then put the fuse back in. You said you're putting in the fuse and then removing the key? Dunno. Something to try at least.

I already said that too lol.

Originally Posted by Slick2500

As far as I know you only push buttons on the key fob if you are trying to set it up to your car.
And it has been a while since I messed with the bcm, but I think you need to turn the key to off and open the door before you put the fuse back in. Keep the door closed during the programming process.

Jesus I quit. Been a lonngg day at work. Maybe reposting the answer again he might try it .

Originally Posted by buck531

Jesus I quit. Been a lonngg day at work. Maybe reposting the answer again he might try it .

I have those days too.