keyless entry/BCM

Ashaman074 · 10-17-2007, 12:36 PM

Hi all,

I replaced the Body Control Module on my Bravada to fix the ever-annoying Passlock problems I was having.

The wonderful thing was that it worked! No more "security" light, no more failures to start, etc.

Unfortunately, my keyless entry no longer works...great. I thought maybe it was just a matter of reprogramming the remote to match the new BCM, but that does not seem to be the case.

Does the BCM have to be "programmed" to "know" that a vehicle has keyless entry or something? Maybe a feature that has to be somehow enabled? Both BCMs had the exact same part number, I can't imagine they are different hardware...

Anyway, if someone understands/knows how the keyless entry feature works I would appreciate it!

~~HotRodV6~~ · 10-19-2007, 12:30 PM

did you plug the keyless entry FOB module back in that is mounted to the panel on the underside of the driverside dash?? its back behind the OBD 2 connector on top of the panel.

I have seen them need to be programmed, but not sure if that would cover the keyless entry.

Is that the only thing not working right?

Ashaman074 · 10-20-2007, 02:23 AM

Quote: Originally Posted by HotRodV6

did you plug the keyless entry FOB module back in that is mounted to the panel on the underside of the driverside dash?? its back behind the OBD 2 connector on top of the panel.

I have seen them need to be programmed, but not sure if that would cover the keyless entry.

Is that the only thing not working right?

Yeah, it is still there and plugged in, I actually never unplugged it - just the connectors to the BCM when it was replaced. I did double check though just to make sure they were still hooked up.

I have tried the programming sequence a few times (hold down driver's side lock, etc, etc) but it just acts like keyless entry is no longer there, very strange.

~~HotRodV6~~ · 10-20-2007, 02:21 PM

ok, well did you try puttinig a new battery in the remote fob? ive seen that be the problem as well, and usually they die pretty hard and quick, so you dont always know its the battery till one day they quick working.

Ashaman074 · 10-31-2007, 03:33 PM

Quote: Originally Posted by HotRodV6

ok, well did you try puttinig a new battery in the remote fob? ive seen that be the problem as well, and usually they die pretty hard and quick, so you dont always know its the battery till one day they quick working.

Yeah, I actually ordered a new remote thinking that was the issue, but still no luck. I remember a year ago or so I replaced the battery and went through the programming process with no issue, so I think it has to be something with the BCM.

A bit of net searching seems to indicate that the BCM has to be set up to enable keyless entry as a feature; I have yet to verify this but may take it to the dealer to find out.

NYCBLAZER · 03-06-2008, 12:11 PM

you need to reprogram the bcm. i had the same problem

10-17-2007, 12:36 PM	#1
Ashaman074 Registered User Join Date: Mar 2007 Posts: 20 Location: User is: OffLine	keyless entry/BCM Hi all, I replaced the Body Control Module on my Bravada to fix the ever-annoying Passlock problems I was having. The wonderful thing was that it worked! No more "security" light, no more failures to start, etc. Unfortunately, my keyless entry no longer works...great. I thought maybe it was just a matter of reprogramming the remote to match the new BCM, but that does not seem to be the case. Does the BCM have to be "programmed" to "know" that a vehicle has keyless entry or something? Maybe a feature that has to be somehow enabled? Both BCMs had the exact same part number, I can't imagine they are different hardware... Anyway, if someone understands/knows how the keyless entry feature works I would appreciate it!
	[Reply w/Quote]

10-19-2007, 12:30 PM	#2
~~HotRodV6~~ Banned Age: 34 Join Date: Nov 2001 Posts: 236 Location: Houston Texas User is: OffLine	Re: keyless entry/BCM did you plug the keyless entry FOB module back in that is mounted to the panel on the underside of the driverside dash?? its back behind the OBD 2 connector on top of the panel. I have seen them need to be programmed, but not sure if that would cover the keyless entry. Is that the only thing not working right?
	[Reply w/Quote]

10-20-2007, 02:23 AM	#3
Ashaman074 Registered User Join Date: Mar 2007 Posts: 20 Location: User is: OffLine	Re: keyless entry/BCM Quote: Originally Posted by HotRodV6 did you plug the keyless entry FOB module back in that is mounted to the panel on the underside of the driverside dash?? its back behind the OBD 2 connector on top of the panel. I have seen them need to be programmed, but not sure if that would cover the keyless entry. Is that the only thing not working right? Yeah, it is still there and plugged in, I actually never unplugged it - just the connectors to the BCM when it was replaced. I did double check though just to make sure they were still hooked up. I have tried the programming sequence a few times (hold down driver's side lock, etc, etc) but it just acts like keyless entry is no longer there, very strange.
	[Reply w/Quote]

10-20-2007, 02:21 PM	#4
~~HotRodV6~~ Banned Age: 34 Join Date: Nov 2001 Posts: 236 Location: Houston Texas User is: OffLine	Re: keyless entry/BCM ok, well did you try puttinig a new battery in the remote fob? ive seen that be the problem as well, and usually they die pretty hard and quick, so you dont always know its the battery till one day they quick working.
	[Reply w/Quote]

10-31-2007, 03:33 PM	#5
Ashaman074 Registered User Join Date: Mar 2007 Posts: 20 Location: User is: OffLine	Re: keyless entry/BCM Quote: Originally Posted by HotRodV6 ok, well did you try puttinig a new battery in the remote fob? ive seen that be the problem as well, and usually they die pretty hard and quick, so you dont always know its the battery till one day they quick working. Yeah, I actually ordered a new remote thinking that was the issue, but still no luck. I remember a year ago or so I replaced the battery and went through the programming process with no issue, so I think it has to be something with the BCM. A bit of net searching seems to indicate that the BCM has to be set up to enable keyless entry as a feature; I have yet to verify this but may take it to the dealer to find out.
	[Reply w/Quote]

03-06-2008, 12:11 PM	#6
NYCBLAZER 5 speed 4 door blazer Join Date: Jan 2007 Posts: 633 Location: BROOKLYN, NEW YORK User is: OffLine	Re: keyless entry/BCM you need to reprogram the bcm. i had the same problem
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