Service Column Lock
Thread Starter
4th Gear
Joined: Oct 2015
Posts: 4
Likes: 0
Service Column Lock
I just put a new head unit and speakers in my 1998 Coupe. I didn't use an adapter to plug into existing wires, but did use the existing wires for the install as much as possible.
Anyway, everything works, but I am getting a Service Column Lock message on the DIC when I start the car. I can reset it away, and everything seems to be okay, but I'd rather it go away. I also looked at the error codes, and the radio says "NO COMM".
Is there any way I can get the Service Column Lock message to stop?
Anyway, everything works, but I am getting a Service Column Lock message on the DIC when I start the car. I can reset it away, and everything seems to be okay, but I'd rather it go away. I also looked at the error codes, and the radio says "NO COMM".
Is there any way I can get the Service Column Lock message to stop?
1/4 mile/AutoX
Joined: Jun 2014
Posts: 11,442
Likes: 2,186
From: Buffalo Texas
I just put a new head unit and speakers in my 1998 Coupe. I didn't use an adapter to plug into existing wires, but did use the existing wires for the install as much as possible.
Anyway, everything works, but I am getting a Service Column Lock message on the DIC when I start the car. I can reset it away, and everything seems to be okay, but I'd rather it go away. I also looked at the error codes, and the radio says "NO COMM".
Is there any way I can get the Service Column Lock message to stop?
Anyway, everything works, but I am getting a Service Column Lock message on the DIC when I start the car. I can reset it away, and everything seems to be okay, but I'd rather it go away. I also looked at the error codes, and the radio says "NO COMM".
Is there any way I can get the Service Column Lock message to stop?
http://www.complianceparts.com/lmc5whoneeds1.html
Drifting
Joined: Mar 2013
Posts: 1,496
Likes: 353
From: Little Rock Arkansas
If you're wanting the SERVICE COLUMN LOCK message to disappear you need to install an LMC5 if one is not present. If one is present you need to check battery voltage or perform the "brown wire" mod.You're going to get this message with an aftermarket head unit installed. The OEM head unit has functions that are tied into the BCM (Body Control Module). I take it you also have Bose in the car; remember Bose is an option in the C5 which provides more complication when installing an aftermarket head unit.
1/4 mile/AutoX
Joined: Jun 2014
Posts: 11,442
Likes: 2,186
From: Buffalo Texas
Safety Car
Joined: Dec 2010
Posts: 3,938
Likes: 498
From: Fords, NJ
(Cut and pasted from another member, but i don't recall who so I can't give him credit )
"It's on the bottom of page 2 in the instruction manual and also reproduced here in one of the multiple threads on this subject.
Basically you again disconnect the neg battery terminal, remove the upper larger pink connector from the BCM, pull out the lower dark green 3rd wire from the right (diagonally down to the left from the previous one you replaced with the LMC5 wire) and replace this one with the brown wire from the LMC5, then cut the brown short wire loop sticking out of the LMC5, cap all the wire ends with the caps provided, replace the BCM back in it's holder, reconnect the battery, and you are done. Hopefully forever."
Last edited by SG Lou; Dec 29, 2016 at 02:55 PM.
Heel & Toe
Joined: Dec 2016
Posts: 19
Likes: 0
From: Wichita Kansas
Don't mean to hijack the thread but what's the difference between the LMC5 and something like corvettes of Houston Steering Wheel Lock Bypass Kit. Do I need both to protect myself from it ever locking up. Thanks
http://www.tickperformance.com/corve...-c5-corvettes/
http://www.tickperformance.com/corve...-c5-corvettes/
1/4 mile/AutoX
Joined: Jun 2014
Posts: 11,442
Likes: 2,186
From: Buffalo Texas
Don't mean to hijack the thread but what's the difference between the LMC5 and something like corvettes of Houston Steering Wheel Lock Bypass Kit. Do I need both to protect myself from it ever locking up. Thanks
http://www.tickperformance.com/corve...-c5-corvettes/
http://www.tickperformance.com/corve...-c5-corvettes/
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Safety Car
Joined: Dec 2010
Posts: 3,938
Likes: 498
From: Fords, NJ
Don't mean to hijack the thread but what's the difference between the LMC5 and something like corvettes of Houston Steering Wheel Lock Bypass Kit. Do I need both to protect myself from it ever locking up. Thanks
http://www.tickperformance.com/corve...-c5-corvettes/
http://www.tickperformance.com/corve...-c5-corvettes/
Le Mans Master
Joined: Jul 2011
Posts: 7,426
Likes: 970
From: Morristown New Jersey
Oldtimer
Heel & Toe
Joined: Dec 2016
Posts: 19
Likes: 0
From: Wichita Kansas
I just bought the car about a month ago. I'm not sure if the wheel has ever locked up. Should I get the LMC5 to prevent it from ever doing it or is the LMC5 only for cars to prevent it after is has already locked. Thanks!
Safety Car
Joined: Mar 2005
Posts: 3,757
Likes: 1,215
From: Wisconsin
Burning Brakes
Joined: Nov 2014
Posts: 920
Likes: 190
From: Stoneham, MA
The column was supposed to lock when there is no key in the ignition as it came from the factory. The issue with the C5 column lock system as it came from the factory is that under certain conditions it is possible to drive the car with the column locked. That was the reason for the recall.
Is your car a manual or automatic trans??
If a manual trans does the column lock when there is NO KEY in the ignition? If yes then you absolutely need to get and install an LMC5. Without it your column can lock when the battery goes low and you could also experience the 2mph fuel shutoff either of which can leave you stranded.
Is your car a manual or automatic trans??
If a manual trans does the column lock when there is NO KEY in the ignition? If yes then you absolutely need to get and install an LMC5. Without it your column can lock when the battery goes low and you could also experience the 2mph fuel shutoff either of which can leave you stranded.
Heel & Toe
Joined: Dec 2016
Posts: 19
Likes: 0
From: Wichita Kansas
What year is your car and is it an automatic or manual trans. To answer your question accurately we need to have the answer to BOTH questions.
While you are at answering those questions it would be nice if you could put some information about your car in your profile. Year, manual or automatic, any mods etc. Just because all C5 look the same doesn't mean that there were not significant differences across the years and between systems for manual or automatic.
While you are at answering those questions it would be nice if you could put some information about your car in your profile. Year, manual or automatic, any mods etc. Just because all C5 look the same doesn't mean that there were not significant differences across the years and between systems for manual or automatic.
My car is a 1999 and was originally an automatic but the previous owner did a manual swap to it. I am able to move the steering wheel freely when the car is off too if that helps answer any questions.
Le Mans Master
Joined: Jul 2011
Posts: 7,426
Likes: 970
From: Morristown New Jersey
Oldtimer
Personally I would not waste my money on a CLB like shown in your link in post #7. It is more expensive and much more difficult to install especially given the unknows of what has previously been done to the column lock system on your car. The LMC5 is a far better choice since it installs right at the BCM in the passenger foot well and unlike the CLB which requires undoing any previous GM Column lock service, the LMC5 abandons all column lock factory and recall wiring downstream of the BCM.
Compliance Parts is just a no-brainer for this problem. You'll be glad you did it!
As an aside, the thought of a steering column locking up while underway is really scary.