column lock bypass issue - CorvetteForum - Chevrolet Corvette Forum Discussion

Notices
C5 Tech Corvette Tech/Performance: LS1 Corvette Technical Info, Internal Engine, External Engine, Tech Topics, Basic Tech, Maintenance, How to Remove & Replace
Sponsored by:
Sponsored by:

column lock bypass issue

Reply

 
 
 
Old 08-10-2018, 08:31 AM
  #1  
johnhm85
Junior Member
Thread Starter
 
johnhm85's Avatar
 
Member Since: Aug 2018
Location: Pearland TX
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Default column lock bypass issue

i installed a CLB on my 99 vette but still get the "service column lock" in the DIC. Can anyone help??
My wheel is stuck unlocked which i thought would make it a bit easier on me but it appears not.
any guidance is GREATLY appreciated!
johnhm85 is offline  
Reply With Quote
Old 08-10-2018, 09:43 AM
  #2  
Velocity_Vette
CF Senior Member
 
Velocity_Vette's Avatar
 
Member Since: Mar 2013
Location: Little Rock Arkansas
Posts: 1,170
Thanked 251 Times in 218 Posts
Default

1) Which CLB do you have installed?

2A) If the answer to number 1 is the LMC5, then you probably need to do the brown wire mod.

2B) If the answer to number 1 is not the LMC5, then you probably need to install the LMC5 and perform the brown wire mod.
Velocity_Vette is offline  
Reply With Quote
Old 08-10-2018, 10:00 AM
  #3  
johnhm85
Junior Member
Thread Starter
 
johnhm85's Avatar
 
Member Since: Aug 2018
Location: Pearland TX
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Default

I got the CLB kit from corvette world in Houston...they guy who sold it to me said “should be simple” “I’ve installed hundreds”.
johnhm85 is offline  
Reply With Quote
Old 08-10-2018, 10:02 AM
  #4  
johnhm85
Junior Member
Thread Starter
 
johnhm85's Avatar
 
Member Since: Aug 2018
Location: Pearland TX
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Made by “tick performance”
johnhm85 is offline  
Reply With Quote
Old 08-10-2018, 10:10 AM
  #5  
mmartinez
CF Senior Member
 
mmartinez's Avatar
 
Member Since: Sep 2008
Location: Espanola New Mexico
Posts: 344
Thanked 14 Times in 14 Posts
Default

You state that your steering wheel is stuck unlocked, that is what a CLB does, it prevents the steering from locking but also prevents the Service Colum Lock message and the 2 mph fuel shut off. You may have wanted to say that your steering wheel is locked? Install the LMC5 and do the brown wire mod, and have no more problems.
mmartinez is offline  
Reply With Quote
Old 08-10-2018, 10:25 AM
  #6  
8VETTE7
CF Senior Member
 
8VETTE7's Avatar
 
Member Since: Jul 2007
Posts: 21,569
Thanked 1,717 Times in 1,527 Posts
Default

Originally Posted by johnhm85 View Post
i installed a CLB on my 99 vette but still get the "service column lock" in the DIC. Can anyone help??
My wheel is stuck unlocked which i thought would make it a bit easier on me but it appears not.
any guidance is GREATLY appreciated!


See the last post in this thread:

https://www.corvetteforum.com/forums...ars-old-2.html


You need to bypass the column lock relay in order for the system to work properly on a 99 or 2000 when using the old style CLB. Bypass is NOT the same as disconnect/remove the column lock relay when you are using the old CLB rather than the LMC5.

You will be far better off to just order and install an LMC5 IMHO.

Last edited by 8VETTE7; 08-10-2018 at 10:26 AM.
8VETTE7 is offline  
Reply With Quote
Old 08-10-2018, 02:35 PM
  #7  
JrRifleCoach
CF Senior Member
 
JrRifleCoach's Avatar
 
Member Since: Sep 2003
Location: Criminals obey guns laws like politicians follow their oath to office Republik of Kalifornico"
Posts: 18,164
Thanked 204 Times in 190 Posts
St. Jude '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17

Default

Can someone elaborate on the "brown wire mod".
Is this to stop the "remove key for ten seconds" message?

JrRifleCoach is offline  
Reply With Quote
Old 08-10-2018, 02:54 PM
  #8  
Velocity_Vette
CF Senior Member
 
Velocity_Vette's Avatar
 
Member Since: Mar 2013
Location: Little Rock Arkansas
Posts: 1,170
Thanked 251 Times in 218 Posts
Default

Originally Posted by johnhm85 View Post
I got the CLB kit from corvette world in Houston...they guy who sold it to me said “should be simple” “I’ve installed hundreds”.
As 8VETTE7 alluded to above, that style CLB can have issues with 99-00 model cars because of how recall issues were handled. Sometimes, like on my '99, you can install those CLBs and there are no issues. Other times issues can creep up.

The LMC5 is usually the end-all product for any column lock anomalies that arise.

​​​​​​​
Originally Posted by JrRifleCoach View Post
Can someone elaborate on the "brown wire mod".
Is this to stop the "remove key for ten seconds" message?
The LMC5's brown wire mod is used when you have the LMC5 installed but are still receiving column lock related messages. Performing the action can help to eliminate pull key messages.
Velocity_Vette is offline  
Reply With Quote
The Following User Says Thank You to Velocity_Vette For This Useful Post:
JrRifleCoach (08-11-2018)
Old 08-10-2018, 02:56 PM
  #9  
Golfingbob
CF Senior Member
 
Member Since: Jul 2017
Location: Marietta Ga
Posts: 116
Thanked 7 Times in 5 Posts
Default

Originally Posted by JrRifleCoach View Post
Can someone elaborate on the "brown wire mod".
Is this to stop the "remove key for ten seconds" message?


I have a 2002 6 speed that has the CLB already installed. It is the one from Corvette World in Texas. Should I replace this with another unit?
Golfingbob is online now  
Reply With Quote
Old 08-10-2018, 07:46 PM
  #10  
8VETTE7
CF Senior Member
 
8VETTE7's Avatar
 
Member Since: Jul 2007
Posts: 21,569
Thanked 1,717 Times in 1,527 Posts
Default

Originally Posted by Golfingbob View Post
I have a 2002 6 speed that has the CLB already installed. It is the one from Corvette World in Texas. Should I replace this with another unit?

The answer is "It Depends". What were the symptoms that cause you to get a CLB installed? Did you ever actually experience the 2mph fuel shutoff on the car?

The CLB is functionally similar to an LMC5 but it does require a higher battery voltage to function correctly than does an LMC5. That is important because the CLB like the LMC5 is responding to column lock commands from the BCM in place of the lock motor. If the cars battery goes low and the CLB does NOT respond to a BCM unlock command, the BCM sends an "enable fuel shutoff" command to the PCM. Then when you start the car and attempt to drive off the PCM shuts off fuel to the engine and the car stalls. The 2mph fuel shutoff was part of the flashing of the PCM that was supposed to happen when a stealership did the column lock recall service. Other than with a tuning tool like EFI Live or HP Tuners there is no easy way to know if the reflash of the PCM was actually done. And if it was done and the car received a "tune" it is possible that the 2mph value was altered to be a high number like 200 or 255.

If you don't know what the original symptoms for installing a CLB were and/or you want assurance that you won't get left stranded by the 2mph fuel shutoff if/when the battery goes low then get an LMC5 installed and do the "brown wire mod" described as "optional;" on page 2 of the LMC5 install instructions. The LMC5 responds correctly even at battery voltages that will not crank the engine so the chances of getting stranded with an LMC5 installed are virtually none.

The LMC5 abandons all column lock wiring after the BCM so you don't need to worry about a CLB that might be installed or which of the multiple GM Recall Services was done to the car. LMC5 installs right at the BCM so any wiring AFTER the BCM doesn't matter.
8VETTE7 is offline  
Reply With Quote
Old 08-10-2018, 08:26 PM
  #11  
johnhm85
Junior Member
Thread Starter
 
johnhm85's Avatar
 
Member Since: Aug 2018
Location: Pearland TX
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Default

I appreciate all the feedback and help. I have ordered the lmc5 as I believe you’re right 8vette on the 99-00 models being slightly different. It will be in on Monday and I will install.

Thanks again....I will update Monday
johnhm85 is offline  
Reply With Quote
Old 08-10-2018, 08:33 PM
  #12  
8VETTE7
CF Senior Member
 
8VETTE7's Avatar
 
Member Since: Jul 2007
Posts: 21,569
Thanked 1,717 Times in 1,527 Posts
Default

Originally Posted by johnhm85 View Post
I appreciate all the feedback and help. I have ordered the lmc5 as I believe you’re right 8vette on the 99-00 models being slightly different. It will be in on Monday and I will install.

Thanks again....I will update Monday

DO THE BROWN WIRE MOD when you install the LMC5. It is described on page 2 of the LMC5 install instructions a "optional". DO IT ANYWAY and avoid being back in the passenger foot well a second time to do it after you start seeing "pull key and wait....." messages when you go to start the car...........
8VETTE7 is offline  
Reply With Quote
The Following User Says Thank You to 8VETTE7 For This Useful Post:
JrRifleCoach (08-11-2018)
Old 08-10-2018, 08:33 PM
  #13  
Golfingbob
CF Senior Member
 
Member Since: Jul 2017
Location: Marietta Ga
Posts: 116
Thanked 7 Times in 5 Posts
Default

Originally Posted by 8VETTE7 View Post
The answer is "It Depends". What were the symptoms that cause you to get a CLB installed? Did you ever actually experience the 2mph fuel shutoff on the car?

The CLB is functionally similar to an LMC5 but it does require a higher battery voltage to function correctly than does an LMC5. That is important because the CLB like the LMC5 is responding to column lock commands from the BCM in place of the lock motor. If the cars battery goes low and the CLB does NOT respond to a BCM unlock command, the BCM sends an "enable fuel shutoff" command to the PCM. Then when you start the car and attempt to drive off the PCM shuts off fuel to the engine and the car stalls. The 2mph fuel shutoff was part of the flashing of the PCM that was supposed to happen when a stealership did the column lock recall service. Other than with a tuning tool like EFI Live or HP Tuners there is no easy way to know if the reflash of the PCM was actually done. And if it was done and the car received a "tune" it is possible that the 2mph value was altered to be a high number like 200 or 255.

If you don't know what the original symptoms for installing a CLB were and/or you want assurance that you won't get left stranded by the 2mph fuel shutoff if/when the battery goes low then get an LMC5 installed and do the "brown wire mod" described as "optional;" on page 2 of the LMC5 install instructions. The LMC5 responds correctly even at battery voltages that will not crank the engine so the chances of getting stranded with an LMC5 installed are virtually none.

The LMC5 abandons all column lock wiring after the BCM so you don't need to worry about a CLB that might be installed or which of the multiple GM Recall Services was done to the car. LMC5 installs right at the BCM so any wiring AFTER the BCM doesn't matter.
Thanks,
Don't know what issues caused it to be installed or if there were any. I know the factory recall Was done also. So I just leave the CLB hooked up and install the LMC5.
Golfingbob is online now  
Reply With Quote
Old 08-12-2018, 12:52 PM
  #14  
mike schanuth
CF Member
 
mike schanuth's Avatar
 
Member Since: Feb 2007
Location: pappillion nebraska
Posts: 61
Thanked 0 Times in 0 Posts
Default

Originally Posted by johnhm85 View Post
i installed a CLB on my 99 vette but still get the "service column lock" in the DIC. Can anyone help??
My wheel is stuck unlocked which i thought would make it a bit easier on me but it appears not.
any guidance is GREATLY appreciated!
I also installed the clb on my 1999 frc about 9 years ago and it just failed I think cause im right back to only moving 2 miles an hour and service colum lock anyone else had this failure??
mike schanuth is offline  
Reply With Quote
Old 08-12-2018, 04:28 PM
  #15  
8VETTE7
CF Senior Member
 
8VETTE7's Avatar
 
Member Since: Jul 2007
Posts: 21,569
Thanked 1,717 Times in 1,527 Posts
Default

Originally Posted by mike schanuth View Post
I also installed the clb on my 1999 frc about 9 years ago and it just failed I think cause im right back to only moving 2 miles an hour and service colum lock anyone else had this failure??

Many possibilities on the cause of your symptoms. Could be the CLB failed or it could be the column lock relay failed due to low battery voltage, or could be that the car had a GM K Harness installed and the CLB was plugged into the K Harness and the K Harness just fried due to low battery voltage........

I would not waste lot of time trying to figure out the cause. Order and install an LMC5 and do the "brown wire mod" explained on page 2 of the LMC5 install instructions at the time of the LMC5 install. The LMC5 abandons all factory, recall or CLB wiring downstream of the BCM. That is its one major advantage over the CLB. It doesn't rely on any of the components after the BCM since it connects directly at the BCM.
8VETTE7 is offline  
Reply With Quote
The Following User Says Thank You to 8VETTE7 For This Useful Post:
mike schanuth (08-12-2018)
Old 08-13-2018, 01:37 AM
  #16  
laurent_zo6
CF Senior Member
Support Corvetteforum!
 
laurent_zo6's Avatar
 
Member Since: Aug 2013
Posts: 1,838
Thanked 140 Times in 108 Posts
St. Jude Donor '15-'16-'17-'18
Default

Originally Posted by JrRifleCoach View Post
Can someone elaborate on the "brown wire mod".
Is this to stop the "remove key for ten seconds" message?

When you install the LMC5, you should no longer see the "wait 10 sec. message. The original instructions state that the brown wire mod is optional. It appears that after LMC5 installation, some cars still get the message so it's better to do the brown wire mode preventively.
laurent_zo6 is offline  
Reply With Quote
Old 08-15-2018, 10:51 AM
  #17  
johnhm85
Junior Member
Thread Starter
 
johnhm85's Avatar
 
Member Since: Aug 2018
Location: Pearland TX
Posts: 14
Thanks: 0
Thanked 0 Times in 0 Posts
Default

Ok so i installed the LMC5 a few days ago with NO issues at all...quick and simple process and good to go now!! Thanks to all for the support!!

Also, it is worth mentioning that Richard from Complianceparts was AWESOME! I called to ask about ordering and he is EXTREMEMLY knowledgeable about this issue and this part!! if you have questions, he is more than willing to help you troubleshoot AND he has pretty much seen it all from what i can tell....he knows differences between 99,98,01, etc....Great guy and a ton of help!

Thanks again!! If you are experiencing the "service column lock" or "pull key" message, get on amazon and order the LMC5! after 20 minutes you will have no more issues!!
johnhm85 is offline  
Reply With Quote
 
 
 


Thread Tools
Search this Thread
Sponsored Ads
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: