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Column lock failure

 
Old 03-10-2018, 10:39 PM
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Dbl_D718
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Default Column lock failure

I read the sticky, and several other threads on the subject, but I'm still not really sure what the plan forward is for my failure. My column lock seems to have failed in the unlocked position, so it is unlocked with the key both on and off. My car is a 2002 Z06, so I'm experiencing the fuel cutoff at 2 mph, even though my column is unlocked.

I have tried all the different combinations of clearing codes, pulling BCM fuses, disconnecting the battery, etc, without any luck. I can still hear the ECL activate at key on and off, but the column never locks. The first start after resets, I get the "pull key, wait 10 seconds" message, then subsequent starts give the "service column lock" message.

Does this require repair at a dealership? Can I install a CLB now and be good since my column is unlocked? Is there a wire I can just ground or jump so the BCM thinks the column is unlocked?

Thanks!
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Old 03-11-2018, 12:50 PM
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mmartinez
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Since it's failed in the unlock state, I would install the CLB and be done with it, that being said my 97 column lock is still working, I have a CLB on hand, but have not installed it because I still want the anti theft benefit since my car is a M6.
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Old 03-11-2018, 01:37 PM
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It sounds like you need the LMC5 from complianceparts.com . On my '00 A4 I never had an issue but carried an LMC5 in the glove box and sent it with the car when I sold it. On my '99 M6 vert I got the Pull Key and Service Column Lock messages plus had the 2 MPH shutdown. I installed the LMC5 and that cured the problem. The installation instructions cover removing the relay to disable the locking motor. Stay away from the dealer since as I understand it the GM fix doesn't cure the root cause of this problem. Good luck on finding a lasting fix.

Last edited by Danlb; 03-11-2018 at 01:44 PM.
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Old 03-11-2018, 09:25 PM
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Originally Posted by Danlb View Post
It sounds like you need the LMC5 from complianceparts.com . On my '00 A4 I never had an issue but carried an LMC5 in the glove box and sent it with the car when I sold it. On my '99 M6 vert I got the Pull Key and Service Column Lock messages plus had the 2 MPH shutdown. I installed the LMC5 and that cured the problem. The installation instructions cover removing the relay to disable the locking motor. Stay away from the dealer since as I understand it the GM fix doesn't cure the root cause of this problem. Good luck on finding a lasting fix.
Yeah, I have an LMC5 on order now. After having time to keep reading, hopefully that will be all I need to get back on the road.
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Old 03-11-2018, 11:40 PM
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LMC5 yep! Takes about 2hrs and patience to install. Pain to work way down there
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Old 03-12-2018, 09:47 AM
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Originally Posted by Dbl_D718 View Post
I read the sticky, and several other threads on the subject, but I'm still not really sure what the plan forward is for my failure. My column lock seems to have failed in the unlocked position, so it is unlocked with the key both on and off. My car is a 2002 Z06, so I'm experiencing the fuel cutoff at 2 mph, even though my column is unlocked.
This is typical operation.

What this means is that your car has the GM recall performed. Part of the recall was to not only install a smaller lock plate, hence why your column cannot lock, but also to program in a 2 MPH fuel shut off.

It's not that the column lock has "failed" but rather the GM -installed CLBs have failed. An LMC5 as mentioned or older 'Vettes of Houston -style bypass will remedy the issue.
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Old 05-02-2018, 10:53 AM
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I put a lmc5 on my z and its worked fine for a couple of years, but after car sitting and forgetting to have tender on it, I had to jump it. now I get the column lock message on my dic but it hasn't locked up. any suggestions?
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Old 05-02-2018, 03:35 PM
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not getting the pull key and wait message
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Old 05-02-2018, 03:58 PM
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Originally Posted by hifi875 View Post
not getting the pull key and wait message
If you have the LMC5 installed and are getting the Service Column Lock message, especially since this started after letting your battery die, you need to make sure your battery is fully charged and still healthy. The battery can be strong enough to start the car, but still weak enough to cause column lock problems. You may need a new battery.

Otherwise, contact Compliance Parts for help.
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Old 05-02-2018, 04:52 PM
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Originally Posted by 8VETTE7 View Post
100%


First place to start is by checking the car battery.


Electronics in the C5 are exceptionally sensitive to low battery voltage!!!
ok will do its relatively new 1.5 yrs at most
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