Go Back   Corvette Forum > C5 Corvettes, 1997 - 2004 > C5 Tech
Sign in using an external account
Register Forgot Password?
Register Search Today's Posts Mark Forums Read FAQ Vendor Directory
Search
C5 Tech
Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace Sponsored by
Karl Chevrolet

Welcome to Corvetteforum.com!
Welcome to Corvetteforum.com.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join Corvetteforum.com today!


Corvette Store
 
 
C7 Parts & Accessories
C6 Parts & Accessories
C5 Parts & Accessories
C4 Parts & Accessories
C3 Parts & Accessories
C2 Parts & Accessories
C1 Parts & Accessories
Wheels & Tires
Sponsored Ads
 
 
Vendor Directory
  
Reply
 
 
 
 
Thread Tools Search this Thread
Old 08-05-2009, 12:46 AM   #1
99BlkVette
Junior Member
 
Member Since: Dec 2006
Default How to reprogram BCM?

Just replaced my BCM and currently experiencing a column lock symptom. I thought I read somewhere that you could manually reprogram the BCM so that you could drive your car down to the dealership if you needed to have it reprogrammed. Anyone have any good links or know what to do? I can't seem to find anything through my searches.
99BlkVette is offline   Reply With Quote
Old 08-05-2009, 07:12 AM   #2
dougbfresh
CF Senior Member
 
Member Since: Nov 2005
Default

No you can't do that without a TechII I believe. Call the tow truck!
dougbfresh is offline   Reply With Quote
Old 08-05-2009, 09:40 AM   #3
8VETTE7
CF Senior Member
 
8VETTE7's Avatar
 
Member Since: Jul 2007
Default

As far as I know the only tuning tools that can touch anything to do with the column lock system are EFI Live and HP Tuners. Especially if you are experiencing the fuel shutoff at 2mph.
8VETTE7 is offline   Reply With Quote
Old 08-05-2009, 11:28 AM   #4
JVetthead
CF Senior Member
 
JVetthead's Avatar
 
Member Since: Jan 2005
Location: San Leon TEXAS
Default

If it is a security issue you have to relearn the key security codes...
Is this a used BCM? I have done 2 BCM replacements I will see if i can find the procedure..
I did have to take one to the dealer to remove the active handling feature that my car does not have.
JVetthead is offline   Reply With Quote
Old 08-05-2009, 11:31 AM   #5
dgrant3830
Tech Contributor
Wounded Warrior Escort '11
Support Corvetteforum!
 
dgrant3830's Avatar
 
Member Since: Dec 2006
Location: Van Buren Arkansas
Send a message via AIM to dgrant3830 Send a message via Yahoo to dgrant3830
Default

You are correct that there is a manual relearn procedure which I don't have, but it is posted in here somewhere. What it does is allows the secured password that's shared between the PCM and BCM to be relearned which will do exactly what you need, allow the car to start and run to get it to a dealer with a Tech2 where the RPO codes can then be programmed into it. Use the search and you will find it....its here somewhere.
dgrant3830 is offline   Reply With Quote
Old 08-05-2009, 11:39 AM   #6
dougbfresh
CF Senior Member
 
Member Since: Nov 2005
Default

Is this what you need?
http://www.hptuners.com/forum/showpo...72&postcount=5

or

http://www.c5help.com/c5_no_start.htm

Last edited by dougbfresh; 08-05-2009 at 11:44 AM.
dougbfresh is offline   Reply With Quote
Old 08-05-2009, 12:09 PM   #7
Bill Curlee
Tech Contributor
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Support Corvetteforum!
 
Bill Curlee's Avatar
 
Member Since: Jun 2001
Location: Gales Ferry CT
Default

The ONLY way to access the BCM is with a TECH II. The only changes that can be done are installing or removing GM RPO codes to support factory or dealer installed options (ie the F-45 Real Time Dampening)

dougbfresh provided you procedures for syncing the BCM / PCM passwords.

That will get the car to run but,,,it will NOT address any RPO codes that are no longer supported. You will know if there are issues because they will either NOT FUNCTION or you will have No Comms DTCs.

If you have column lock issues, thats a security related problem or a Column Lock circuit failure.

Get the BCm issues sorted out and then work on the column lock. Is your steering wheel locked ???

The 2 mph speed restriction (fuel cut off can be addressed via the PCM using EFI Live or HP Tuners. You remove the sucreity related fuel cut off via a table.

Bill

Bill
Bill Curlee is offline   Reply With Quote
Old 08-05-2009, 02:57 PM   #8
ajg1915
CF Senior Member
St. Jude Donor '08
Support Corvetteforum!
 
ajg1915's Avatar
 
Member Since: May 2005
Location: West Norriton PA
Default

Quote:
Originally Posted by 99BlkVette View Post
Just replaced my BCM and currently experiencing a column lock symptom. I thought I read somewhere that you could manually reprogram the BCM so that you could drive your car down to the dealership if you needed to have it reprogrammed. Anyone have any good links or know what to do? I can't seem to find anything through my searches.
Where are you located ? I have a Tech2 that can fix problem if you're local.

I'm in the King of Prussia area of PA.
ajg1915 is offline   Reply With Quote
Old 08-10-2009, 04:16 PM   #9
99BlkVette
Junior Member
 
Member Since: Dec 2006
Default

Located in UTAH. Thanks for the offer to help reprogram.

dougbfresh, thanks for the links. They worked out great. Got the car started. Now I need to get the column lock issue figured out.
99BlkVette is offline   Reply With Quote
Old 08-10-2009, 04:17 PM   #10
ajg1915
CF Senior Member
St. Jude Donor '08
Support Corvetteforum!
 
ajg1915's Avatar
 
Member Since: May 2005
Location: West Norriton PA
Default

Quote:
Originally Posted by 99BlkVette View Post
Located in UTAH. Thanks for the offer to help reprogram.

dougbfresh, thanks for the links. They worked out great. Got the car started. Now I need to get the column lock issue figured out.
Corvettes of Houston sells the best column lock kit.
ajg1915 is offline   Reply With Quote
Old 08-10-2009, 10:58 PM   #11
99BlkVette
Junior Member
 
Member Since: Dec 2006
Default

So, what does everyone think is my problem? After reading the forum below, it seems that when I replaced my BCM with one from a salvaged unit, the pallet in my key is now wrong for the unit. As a result, the security system is locking me out by killing the motor if I go faster than 2 mph. So, would taking it the dealer fix this issue? Is there anyway to bypass this 2mph so I can drive to the dealership? The car runs just is stopped by the 2mph. I can't be sure, but I don't think my column is really locking on me. I'm wondering if someone did the CLB already. I'll check tonight. If not, I'm buying one tonight. Would it be the consenses that reprogramming would take care of all issues?


http://forums.corvetteforum.com/c5-t...m-running.html
99BlkVette is offline   Reply With Quote
Old 08-10-2009, 11:29 PM   #12
Bill Curlee
Tech Contributor
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Support Corvetteforum!
 
Bill Curlee's Avatar
 
Member Since: Jun 2001
Location: Gales Ferry CT
Default

Quote:
Originally Posted by 99BlkVette View Post
So, what does everyone think is my problem? After reading the forum below, it seems that when I replaced my BCM with one from a salvaged unit, the pallet in my key is now wrong for the unit. As a result, the security system is locking me out by killing the motor if I go faster than 2 mph. So, would taking it the dealer fix this issue? Is there anyway to bypass this 2mph so I can drive to the dealership? The car runs just is stopped by the 2mph. I can't be sure, but I don't think my column is really locking on me. I'm wondering if someone did the CLB already. I'll check tonight. If not, I'm buying one tonight. Would it be the consenses that reprogramming would take care of all issues?


http://forums.corvetteforum.com/c5-t...m-running.html
Try this:

BCM/PCM RELEARN PROCEDURE


You will need to conduct the PCM/BCM relearn process. This matches their handshake ID's and allows them to talk to each other.

Do this before you worry about VATS issues:

1. Turn on the key for 11 minutes.
2 Turn off the key for 30 seconds.
3. Repeat 1&2 two more times.
4. Turn on the key for 30 seconds.

The car should start and run with the new BCM. Good luck and report back on your progress.
Shirl
SD Racing Enterprises
Aguila, AZ
Coutersy of MrEracer


This will sync the PCM to the New BCM but all of your RPO options will not be retained. You will need a TECH II to program them into the new BCM.

Bill Curlee
Bill Curlee is offline   Reply With Quote
Old 08-11-2009, 11:30 AM   #13
99BlkVette
Junior Member
 
Member Since: Dec 2006
Default

Quote:
Originally Posted by Bill Curlee View Post
Try this:

BCM/PCM RELEARN PROCEDURE


You will need to conduct the PCM/BCM relearn process. This matches their handshake ID's and allows them to talk to each other.

Do this before you worry about VATS issues:

1. Turn on the key for 11 minutes.
2 Turn off the key for 30 seconds.
3. Repeat 1&2 two more times.
4. Turn on the key for 30 seconds.

The car should start and run with the new BCM. Good luck and report back on your progress.
Shirl
SD Racing Enterprises
Aguila, AZ
Coutersy of MrEracer


This will sync the PCM to the New BCM but all of your RPO options will not be retained. You will need a TECH II to program them into the new BCM.

Bill Curlee
I did do this procedure and got the car to start. When I first put my BCM, it wouldn't start at all. After I did this "relearn" step, the car started but won't allow me to go over 2mph. Any thoughts on bypassing the 2mph fuel cut to get it over to the dealer.
99BlkVette is offline   Reply With Quote
Old 08-11-2009, 11:32 AM   #14
ajg1915
CF Senior Member
St. Jude Donor '08
Support Corvetteforum!
 
ajg1915's Avatar
 
Member Since: May 2005
Location: West Norriton PA
Default

Quote:
Originally Posted by 99BlkVette View Post
I did do this procedure and got the car to start. When I first put my BCM, it wouldn't start at all. After I did this "relearn" step, the car started but won't allow me to go over 2mph. Any thoughts on bypassing the 2mph fuel cut to get it over to the dealer.
Get somebody with a programmer that can change the fuel cut-off speed to 200 mph.
ajg1915 is offline   Reply With Quote
Old 08-23-2009, 09:58 AM   #15
99BlkVette
Junior Member
 
Member Since: Dec 2006
Default

8-23-09 Update.

Car is up and running. Thanks for everyone's help. I have to especially thank Chuck (8Vette7) for walking me through fixing my issue.

Car was a 99 with the 6spd. My car's BCM got wet and I replaced it with a used one. After I relearned the PCM to the BCM, the car started but then I got the CL failure. I pulled everything apart and found that I had a K-harness installed. As part of the GM recall, this harness was installed and I believe the locking mechanism was deactivated as I could turn the steering wheel with no key. Also the 2mph fuel cut was programmed in. To fix the issue, I disconnected the K-harness, and installing the CLB. I had to get the CLB working, I had to pull fuses 25 and 29 for a minute. After that the car started right up. Thanks again guys.
99BlkVette is offline   Reply With Quote
Old 01-24-2011, 06:10 PM   #16
alan61
Junior Member
 
Member Since: Jan 2011
Default

i had put a new ignition switch and used the same lock cylinder and the C5 would not start the code is 40- BCM B2723 HC do i have to get a new BCM or just get it program and only a dealer could do it
alan61 is offline   Reply With Quote
Old 01-24-2011, 08:06 PM   #17
Bill Curlee
Tech Contributor
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Support Corvetteforum!
 
Bill Curlee's Avatar
 
Member Since: Jun 2001
Location: Gales Ferry CT
Default

NO! The VATS circuit isnt working. Are you sure that you connected the small VATS black jacketed wire when you replaced the switch??

You can see it in this picture. It goes to the small metal can (sensor) on the front of the key cylinder. Make sure it plugged in properly!!!


Click the image to open in full size.
Bill Curlee is offline   Reply With Quote
Old 01-24-2011, 08:29 PM   #18
alan61
Junior Member
 
Member Since: Jan 2011
Default

yes i did all that. At this time i am now changeling the lock cylinder because i had some trouble with the key
alan61 is offline   Reply With Quote
Old 01-24-2011, 08:32 PM   #19
Bill Curlee
Tech Contributor
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Support Corvetteforum!
 
Bill Curlee's Avatar
 
Member Since: Jun 2001
Location: Gales Ferry CT
Default

If you received a NEW key,,,,,, was the pellet resistance the EXACT same value as your old key pellet???

Last edited by Bill Curlee; 01-24-2011 at 08:35 PM.
Bill Curlee is offline   Reply With Quote
Old 01-24-2011, 08:48 PM   #20
alan61
Junior Member
 
Member Since: Jan 2011
Default

same key
alan61 is offline   Reply With Quote
Old 01-24-2011, 08:48 PM
 
Go Back   Corvette Forum > C5 Corvettes, 1997 - 2004 > C5 Tech
Reload this Page How to reprogram BCM?
 
 
 
Reply

Tags
bcm, body, c5, control, corvette, dampenning, key, module, program, real, relearn, removal, reprogram, tech, time


Thread Tools Search this Thread
Search this Thread:

Click for Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Steering Column Lock FAQs - please read before you post (sticky please) Cscokd C5 Tech 1984 07-19-2014 02:58 PM
1 Million Dollars To The Corvette Pro That Solves This Problem!!!!! c51998 C5 Tech 61 06-21-2005 02:04 AM
i think dealer is trying to stiff me!! NEED HELP ASAP wannabe-psi C5 Tech 44 06-07-2005 12:46 PM
Getting rid of column-lock (completely) BruceBe C5 Tech 52 02-24-2005 08:28 PM
The latest column lock recall...(merged threads) 01VETTECOP C5 General 297 09-18-2004 02:04 PM
Column Lock Bypass.... Is it difficult to install? blittle C5 Tech 12 02-12-2004 10:18 PM
Just had my BCM replaced by dealer Jigsaw C5 Tech 15 08-21-2002 06:48 PM


All times are GMT -4. The time now is 10:13 AM.


Emails & Password Backup

Search Engine Friendly URLs by vBSEO 3.5.2