"Pull Key-Wait 10 Seconds" every time
Instructor
Joined: Dec 2016
Posts: 172
Likes: 57
I watched a video on installing the the lmc5 and there is no mention of a brown wire - the first clip is orang and purple wires and the last clip has a green wire - I just had this happen on my 2001 6sp last night - column locked and I could start it but the column stayed locked - went out in the other car and several hours later came home and tried it - started up like nothing was wrong and I could pull it in the garage, I have no idea what was done on it prior as I just bought 3 days ago
So what is the brown wire fix? Planning on calling them tomorrow to order one
So what is the brown wire fix? Planning on calling them tomorrow to order one
Heel & Toe
Joined: Aug 2012
Posts: 23
Likes: 4
From: Michigan
Installed the lmc5 2 years ago. stopped the colunm lock but got the pull key BS. and been ignoring trying to fix it. The brown wire fixed the issue. Feeling better about the car. Dislike the Gremlins this car has but love driving it! 02 Z.
Team Owner
Joined: Oct 2006
Posts: 20,393
Likes: 431
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17
NCM Member '09
Melting Slicks
Joined: Nov 2009
Posts: 2,922
Likes: 219
From: West Branch, MI
You forgot LOL, IMHO and WTHDIDN... Last one is What the hell do I do now? 
Soofrsh, I feel your pain on the acronyms. That is why I have been keeping a list of them (updated as new ones appear) that are frequently used on the forum. Here they are: The comments may not be exactly right for the purist but are good for me 
ASR
Acceleration Slip Regulation. AKA, Traction Control.
BCM
Body Control Module. It is a computer that controls or interfaces with all the body functions and communicates with all the other modules/computers in the car. BCM is one of the 11 DTC-sections.
CEL
Check Engine Light with engine symbol and Check below. Usually refers to emission related issues.
CLB
Column Lock Bypass
Device for preventing column lock.
DIC
Driver Information Centre. It's the small screen behind the steering wheel that says "Corvette... by Chevrolet" and that shows you what's wrong, if anything.
DCM
Door Control Module. Controls the locks and windows. Can be repaired.
DRL's
Daytime running lights. An in-between to not having lights on at all and popping up your regular lights.
DTC
Diagnostic Trouble Code. To fetch them, turn your car's key to 'on', reset all DIC messages by hitting button #6, then hold button #4 and hit button #1 four times. Now you can write down the DTC's, if present.
EBTCM
Electronic Brake & Traction Control Module. This is a module or computer, 1997-1998 situated underneath the trunk of the car, after that in the engine compartment, that governs ABS as well as traction control. Thanks @LoneStarFRC for the correction.
ESC
Electronic Suspension Control. It's a module that does as its name suggests.
FOB
Actually this is not an abbreviation but it may still be good to have in this list. A key fob is the little transmitter / receiver that you use to open / close the car, set the alarm etc.
FRC
Fixed roof coupe, this being the hardtop version of a C5. The abbreviation also stands for 'fuel rail cover' and, as if we could forget, also for 'Flying Roof Club'. You'll become a member automatically upon having your coupe roof fly through the air due to it not being fastened. Thanks @ronwc for this contribution.
HUD
Head-up display. Option available as of late '99. The car's speed and other variables are projected on your windshield. To install, see here.
HVAC
Heater, Ventilator, Airconditioning. If you have a HVAC-code, it has something to do with either your heater, ventilator or airco. HVAC is one of the 11 DTC-sections.
IAT
Intake Air Temp (sensor). If sensor is defective, will show active handling warm up on DTC and may not pass emissions.
IPC
Instrument Panel Cluster. It contains all instruments and the DIC. IPC is one of 11 DTC-sections.
LTFT
Long Term Fuel Trims
LMC5
An aftermarket module that, once installed, fixes or prevents column lock failures.
LDCM
Left door control module. This is the module or computer that controls everything related to the left door. LDCM is one of 11 DTC-sections.
MAF
Mass Air Flow. A sensor that tells the computer in your car info about airflow prior to entering the throttle body. It is the device between the air filter housing and the flat tube that connects to the engine at the throttle body. It has a wiring connection that runs back to the engine. A check engine light may occur if the MAF screen is dirty. If dirty, the MAF needs to be pulled and the screen should be cleaned by spray. Codes and P0171 H P0174 H are Lean banks 1 and 2. MOST likely cause of these two codes together is an air leak after the MAF.
Check the air plumbing between the MAF and TB for loose clamps, cracks in the rubber couplings etc
Also check out the hoses for the PCV system. Over time they rot and also allow unmetered air into the system which causes the lean codes on both banks..
MIL
Malfunction Interior Light
OBDII
On-Board Diagnostics II. System to read and diagnose DTC's. To connect to a C5's OBDII, you need to connect a Tech II (or another type of) scanner to the car's OBDII-port. The connector is located underneath the IPC.
OEM
Original Equipment Manufacturer. If someone tells you to buy OEM parts, he means original GM stuff made specifically for your C5.
PCM
Powertrain Control Module. It is the computer that controls the engine. It is designed to maintain exhaust emission levels while maintaining drivability and fuel efficiency. Functions: fuel control, ignition control, knock sensor system, automatic transmission shift functions, certain manual transmission parts, cruise control enable, generator, evaporate emission purge, air-conditioning clutch control, cooling fan control and secondary air injection. PCM is one of 11 DTC-sections.
RDCM
Right door control module. This is the module or computer that controls everything related to the right door. RDCM is one of 11 DTC-sections.
RFA
Remote function actuation. This module controls the receipt of FOB signals. RFA is one of 11 DTC-sections.
RPO
Regular Production Option. Check your Corvette's factory-built options in the left storing space lid in the back of your C5.
RTD
Real-time damping. This was an RPO for C5's that served to enhance suspension (special shock absorbers, sensors and a console mounted selector with choices of Tour, Sport and Performance.
SCM
Seat control module. It is a module or computer that controls the driver seat. SCM is one of 11 DTC-sections.
SDM
Airbag Control Module
SWPS
Steering Wheel Position Sensor.
TCS
Traction Control System. This system, based on the same principles as ABS but used vice-versa, improves traction of the wheels. TCS is one of 11 DTC-sections.
TDR
THEFT DETERRENT RELAY! (TDR) Look in the passengers foot well... Remove the toe board that covers the fuse panel/BCM. On the fire wall, above the BCM will be some relays. Different numbers for different years.
The relay with FOUR WIRES is the TDR. The wire colors are: Purple, Red, Yellow and Yellow Black Stripe.
TPMS
Tire pressure monitoring system. This module checks whether your tires have correct pressure. If an error is encountered, you'll see a warning in the DIC.
WTB
Want To Buy
Z51
A Corvette with special performance and handling package.
ASR
Acceleration Slip Regulation. AKA, Traction Control.
BCM
Body Control Module. It is a computer that controls or interfaces with all the body functions and communicates with all the other modules/computers in the car. BCM is one of the 11 DTC-sections.
CEL
Check Engine Light with engine symbol and Check below. Usually refers to emission related issues.
CLB
Column Lock Bypass
Device for preventing column lock.
DIC
Driver Information Centre. It's the small screen behind the steering wheel that says "Corvette... by Chevrolet" and that shows you what's wrong, if anything.
DCM
Door Control Module. Controls the locks and windows. Can be repaired.
DRL's
Daytime running lights. An in-between to not having lights on at all and popping up your regular lights.
DTC
Diagnostic Trouble Code. To fetch them, turn your car's key to 'on', reset all DIC messages by hitting button #6, then hold button #4 and hit button #1 four times. Now you can write down the DTC's, if present.
EBTCM
Electronic Brake & Traction Control Module. This is a module or computer, 1997-1998 situated underneath the trunk of the car, after that in the engine compartment, that governs ABS as well as traction control. Thanks @LoneStarFRC for the correction.
ESC
Electronic Suspension Control. It's a module that does as its name suggests.
FOB
Actually this is not an abbreviation but it may still be good to have in this list. A key fob is the little transmitter / receiver that you use to open / close the car, set the alarm etc.
FRC
Fixed roof coupe, this being the hardtop version of a C5. The abbreviation also stands for 'fuel rail cover' and, as if we could forget, also for 'Flying Roof Club'. You'll become a member automatically upon having your coupe roof fly through the air due to it not being fastened. Thanks @ronwc for this contribution.
HUD
Head-up display. Option available as of late '99. The car's speed and other variables are projected on your windshield. To install, see here.
HVAC
Heater, Ventilator, Airconditioning. If you have a HVAC-code, it has something to do with either your heater, ventilator or airco. HVAC is one of the 11 DTC-sections.
IAT
Intake Air Temp (sensor). If sensor is defective, will show active handling warm up on DTC and may not pass emissions.
IPC
Instrument Panel Cluster. It contains all instruments and the DIC. IPC is one of 11 DTC-sections.
LTFT
Long Term Fuel Trims
LMC5
An aftermarket module that, once installed, fixes or prevents column lock failures.
LDCM
Left door control module. This is the module or computer that controls everything related to the left door. LDCM is one of 11 DTC-sections.
MAF
Mass Air Flow. A sensor that tells the computer in your car info about airflow prior to entering the throttle body. It is the device between the air filter housing and the flat tube that connects to the engine at the throttle body. It has a wiring connection that runs back to the engine. A check engine light may occur if the MAF screen is dirty. If dirty, the MAF needs to be pulled and the screen should be cleaned by spray. Codes and P0171 H P0174 H are Lean banks 1 and 2. MOST likely cause of these two codes together is an air leak after the MAF.
Check the air plumbing between the MAF and TB for loose clamps, cracks in the rubber couplings etc
Also check out the hoses for the PCV system. Over time they rot and also allow unmetered air into the system which causes the lean codes on both banks..
MIL
Malfunction Interior Light
OBDII
On-Board Diagnostics II. System to read and diagnose DTC's. To connect to a C5's OBDII, you need to connect a Tech II (or another type of) scanner to the car's OBDII-port. The connector is located underneath the IPC.
OEM
Original Equipment Manufacturer. If someone tells you to buy OEM parts, he means original GM stuff made specifically for your C5.
PCM
Powertrain Control Module. It is the computer that controls the engine. It is designed to maintain exhaust emission levels while maintaining drivability and fuel efficiency. Functions: fuel control, ignition control, knock sensor system, automatic transmission shift functions, certain manual transmission parts, cruise control enable, generator, evaporate emission purge, air-conditioning clutch control, cooling fan control and secondary air injection. PCM is one of 11 DTC-sections.
RDCM
Right door control module. This is the module or computer that controls everything related to the right door. RDCM is one of 11 DTC-sections.
RFA
Remote function actuation. This module controls the receipt of FOB signals. RFA is one of 11 DTC-sections.
RPO
Regular Production Option. Check your Corvette's factory-built options in the left storing space lid in the back of your C5.
RTD
Real-time damping. This was an RPO for C5's that served to enhance suspension (special shock absorbers, sensors and a console mounted selector with choices of Tour, Sport and Performance.
SCM
Seat control module. It is a module or computer that controls the driver seat. SCM is one of 11 DTC-sections.
SDM
Airbag Control Module
SWPS
Steering Wheel Position Sensor.
TCS
Traction Control System. This system, based on the same principles as ABS but used vice-versa, improves traction of the wheels. TCS is one of 11 DTC-sections.
TDR
THEFT DETERRENT RELAY! (TDR) Look in the passengers foot well... Remove the toe board that covers the fuse panel/BCM. On the fire wall, above the BCM will be some relays. Different numbers for different years.
The relay with FOUR WIRES is the TDR. The wire colors are: Purple, Red, Yellow and Yellow Black Stripe.
TPMS
Tire pressure monitoring system. This module checks whether your tires have correct pressure. If an error is encountered, you'll see a warning in the DIC.
WTB
Want To Buy
Z51
A Corvette with special performance and handling package.
Instructor
Joined: Apr 2015
Posts: 239
Likes: 10
From: San Antonio TX
I want to make sure I got this right. The LMC5 only fixes or prevents column lock failures but doesn't fix the "Pull key, wait 10 seconds" correct?
Last edited by JDMricist_03; Nov 7, 2020 at 12:38 AM.
Melting Slicks
Joined: Nov 2014
Posts: 3,399
Likes: 1,339
From: Havre de Grace Maryland
Melting Slicks
Joined: Jan 2016
Posts: 2,398
Likes: 768
From: jefferson texas
I know this will sound odd but I'll relay my experience with the column lock message. After my '99 locked up about 4 years ago I had the LMC5 installed. That unlocked the column, a problem that has not occurred again. However, I do still get the pull key and wait 10 seconds message once in a while. I have noticed that this only happens when I turn the key on and immediately hit the starter. If I wait for the gauges to make their initial sweep and settle all the way back down before engaging the starter I never get the pull key and wait 10 seconds message. I cant explain why it works that way but it is no fluke, has happened a number of times when I forget to let the gauges make that initial sweep and settle all the way back before engaging the starter. It seems to be a mystery!
Team Owner
Joined: Mar 2007
Posts: 45,954
Likes: 55
St. Jude Donor '08-'09-'10-'11
Having read the entirety of this old thread, here's what is happening with my car. I performed the LMC5 mod a very long time ago. Perhaps 15 years ago or so. The mod seemed to work, so after a few months went by I threw out the instructions for the kit. Problem began resurfacing about 5 years ago. My car is garaged and can sit for weeks at a time without going out so I assumed low voltage from the battery. I bought a smart trickle charger and now plug it into the vehicle's cigarette lighter when I bring it home and put it away. This has helped considerably. I only get the pull key message now if the car has been unplugged for a while.
Can't remember any brown wire mod coming with my LMC5. Perhaps I purchased my kit before the brown wire mod came about? My car is a '99. I would love to hear more about this brown wire mod. Perhaps it is something that I can still perform?
Can't remember any brown wire mod coming with my LMC5. Perhaps I purchased my kit before the brown wire mod came about? My car is a '99. I would love to hear more about this brown wire mod. Perhaps it is something that I can still perform?
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Safety Car
Joined: Jan 2014
Posts: 4,496
Likes: 856
From: Walhalla South Carolina
Having read the entirety of this old thread, here's what is happening with my car. I performed the LMC5 mod a very long time ago. Perhaps 15 years ago or so. The mod seemed to work, so after a few months went by I threw out the instructions for the kit. Problem began resurfacing about 5 years ago. My car is garaged and can sit for weeks at a time without going out so I assumed low voltage from the battery. I bought a smart trickle charger and now plug it into the vehicle's cigarette lighter when I bring it home and put it away. This has helped considerably. I only get the pull key message now if the car has been unplugged for a while.
Can't remember any brown wire mod coming with my LMC5. Perhaps I purchased my kit before the brown wire mod came about? My car is a '99. I would love to hear more about this brown wire mod. Perhaps it is something that I can still perform?
Can't remember any brown wire mod coming with my LMC5. Perhaps I purchased my kit before the brown wire mod came about? My car is a '99. I would love to hear more about this brown wire mod. Perhaps it is something that I can still perform?
.
Joined: Apr 2013
Posts: 5,025
Likes: 1,151
From: Oregon
St. Jude Donor '14-'15-'16-'17-'18-'19-'20-'21-'22-'23
Having read the entirety of this old thread, here's what is happening with my car. I performed the LMC5 mod a very long time ago. Perhaps 15 years ago or so. The mod seemed to work, so after a few months went by I threw out the instructions for the kit. Problem began resurfacing about 5 years ago. My car is garaged and can sit for weeks at a time without going out so I assumed low voltage from the battery. I bought a smart trickle charger and now plug it into the vehicle's cigarette lighter when I bring it home and put it away. This has helped considerably. I only get the pull key message now if the car has been unplugged for a while.
Can't remember any brown wire mod coming with my LMC5. Perhaps I purchased my kit before the brown wire mod came about? My car is a '99. I would love to hear more about this brown wire mod. Perhaps it is something that I can still perform?
Can't remember any brown wire mod coming with my LMC5. Perhaps I purchased my kit before the brown wire mod came about? My car is a '99. I would love to hear more about this brown wire mod. Perhaps it is something that I can still perform?
Last edited by Smoken1; Nov 7, 2020 at 02:05 PM.
Drifting
Joined: Jan 2008
Posts: 1,752
Likes: 62
From: New Madison Ohio
Instructor
Joined: Jan 2018
Posts: 166
Likes: 66
From: Tijeras, New Mexico
There is a brown wire within the LMC5 package and you don't use it unless you continue to have a problem as I remember. I had to go back after I continued to have the message and install it. Richard from Compliance Eng. who designed the LMC5 could answer you question for sure.
My car's a '99 as well. I installed the LMC5 a few months ago and still got the "wait" message. I talked to Richard and performed the brown wire install and haven't had a single issue since.
Safety Car
Joined: Jan 2014
Posts: 4,496
Likes: 856
From: Walhalla South Carolina
If the column doesn't lock and just the message popping up, I would give gauges time to sweep as mentioned and see if that helps and wouldn't redo the LMC5 , just my opinion.
.
Joined: Apr 2013
Posts: 5,025
Likes: 1,151
From: Oregon
St. Jude Donor '14-'15-'16-'17-'18-'19-'20-'21-'22-'23
Instructor
Joined: Apr 2015
Posts: 239
Likes: 10
From: San Antonio TX
I know this will sound odd but I'll relay my experience with the column lock message. After my '99 locked up about 4 years ago I had the LMC5 installed. That unlocked the column, a problem that has not occurred again. However, I do still get the pull key and wait 10 seconds message once in a while. I have noticed that this only happens when I turn the key on and immediately hit the starter. If I wait for the gauges to make their initial sweep and settle all the way back down before engaging the starter I never get the pull key and wait 10 seconds message. I cant explain why it works that way but it is no fluke, has happened a number of times when I forget to let the gauges make that initial sweep and settle all the way back before engaging the starter. It seems to be a mystery!
Administrator
Joined: Mar 2001
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Likes: 24,719
From: In a parallel universe. Currently own 2014 Stingray Coupe.
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Moved to C5 Tech.
Racer
Joined: Sep 2019
Posts: 278
Likes: 150
From: Calgary AB
I installed a LMC5 this summer in my 02. As soon as I got it back together I also had the column locked up. You will have to take the LMC5 out, go into the fuse panel under the hood and remove fuse 23 I believe, if my memory serves. Then go back and reinstall the LMC5 and you won't have anymore issues with the column locked or the wait 10 on the DIC. This option has 1 issue though, now my column doesn't lock at all... ever... It's no big deal for me though. Mine is a M6. I got this info straight from Richard when I called him, he was a great help over the phone.