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:

Don't Have A clue

Thread Tools
 
Search this Thread
 
Old Sep 27, 2014 | 06:33 PM
  #1  
NOMOREWORK's Avatar
NOMOREWORK
Thread Starter
Racer
10 Year Member
 
Joined: Dec 2006
Posts: 459
Likes: 95
From: Chelsea Mass
St. Jude Donor '13-'14-'15
Default Don't Have A clue

Have to show my ignorance of computer controlled cars, my 98 has thrown a code which indicates that the torque convertor is not locking up. Can the fix be as simple as replacing the convertor or are there other factors or issues that cause this to happen?
Reply
Old Sep 27, 2014 | 07:41 PM
  #2  
Bill Curlee's Avatar
Bill Curlee
Tech Contributor
Supporting Lifetime Gold
Veteran: Navy
25 Year Member
Liked
Community Favorite
 
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Default

Rick,,, Im selling Torque converters cheep. $200.

Ha,,,,,,,,,,,, Could be as simple as a blown fuse, bad connection, any number of inexpensive quick fixes..

You want to know the secret of finding out????

Read and post ALL your DTCs

Heres the deal: (NOTE! If you have a TON of codes, clear them ALL and take the car for a drive and BEFORE you turn the engine OFF,,, read those DTCs and post up what you you have. Make sure that you post the entire DTC : example " PCM 1465 H"

READING YOUR Engine Diagnostic Codes



The Diagnostic Display Mode is entered with the following procedure:

1) Turn on the ignition but don't start the engine. NOTE! You can read the DTCs with the engine running and or driving down the road but it can distract you. BE careful! Some DTCs clear themselves when you turn the ignition OFF!

2) Press the RESET button to turn off any warning messages. (i.e. door open, trunk open ect)
3) Press and hold OPTIONS
4) While holding OPTIONS, press FUEL four times within a 10-second period.


Initially, on-board diagnostics go into an Automatic Mode which shows diagnostic codes in a pre-set sequence: PCM - TCS - RTD - BCM - IPC - RADIO - HVAC - LDCM - RDCM - SCM - RFA. All codes will be displayed for each. ( i.e. PCM = 4 codes) If none are present in a given module, you will see No More Codes on the display.
There are two kinds of diagnostic codes, Current and History designated with a letter suffix, “C” or “H”. A current C code indicates a malfunction is present and active in the module displaying data. A history code indicates a problem existed sometime in the last 40 or 50 ignition cycles. When not accompanied by a current code of the same number, it's potential evidence of a previous problem, now resolved, that was not removed by clearing the codes.
More likely it's an indication of an intermittent malfunction.
Intermittent codes are the most challenging of the diagnostics. An intermittent code may have happened once, may have happened more than once but is inconsistent or may be happening on a regular basis but not at the time the codes are displayed. History codes can also be caused by a current malfunction in a system that is not operating at the time codes are displayed. An example is the rear window defogger which doesn't operate until the Body Control Module detects engine rpm. For history codes set by a module that does not operate with the key on and engine off, a special diagnostic tool called a Scan Tester is necessary to properly diagnose the malfunction.
Once the system has displayed all modules, it goes into the manual mode which allows selection of each module using combinations of Driver Information Center buttons. Manual mode can also be entered during the automatic sequence by pressing any button except English/Metric (E/M). Once the display shows Manual Diagnostics, select a module by pressing the OPTIONS button to go forward or the TRIP button to go back. Once a module is selected, a code is displayed, and if more than one are present; press GAGES to go forward or FUEL to go back.
To exit the diagnostic mode at any time, press E/M. If you want to erase codes in a given module, press and hold the RESET button To reset the codes once in manual mode, press and hold RESET until it displays NO CODES Press OPTIONS to go to the next module. Repeat the steps until you have reset the codes in all the computer modules.
NOTE!! Only reset the codes IF you want to - it is NOT necessary to do this. Clearing a code does not repair a problem. You are simply erasing the evidence of it in the module's memory. If you clear the code/s, and extinguish the Check Engine Light, your emissions status ready will NOT allow you to pass an emissions test until you have completed the required driving cycles.
Once you have the codes, the next question is: What to do with the information?
First, consult the factory service manual. Any serious C5 Do-It-Yourself owner should invest in the Corvette Service Manual of the appropriate model year. The Service Manual is really a requirement if you want to understand and work on your C5. You can GOOGLE the DTC and also find information on it.




Here is very good site that explains the DTCs:


http://www.corvette-web-central.com/C5DTCcode.html


http://www.obd-codes.com/trouble_cod...d-ii-codes.php



Make sure to include the H or C suffix!!
Reply
Old Sep 27, 2014 | 07:50 PM
  #3  
NOMOREWORK's Avatar
NOMOREWORK
Thread Starter
Racer
10 Year Member
 
Joined: Dec 2006
Posts: 459
Likes: 95
From: Chelsea Mass
St. Jude Donor '13-'14-'15
Default

Originally Posted by Bill Curlee
Rick,,, Im selling Torque converters cheep. $200.

Ha,,,,,,,,,,,, Could be as simple as a blown fuse, bad connection, any number of inexpensive quick fixes..

You want to know the secret of finding out????

Read and post ALL your DTCs

Heres the deal: (NOTE! If you have a TON of codes, clear them ALL and take the car for a drive and BEFORE you turn the engine OFF,,, read those DTCs and post up what you you have. Make sure that you post the entire DTC : example " PCM 1465 H"

READING YOUR Engine Diagnostic Codes



The Diagnostic Display Mode is entered with the following procedure:

1) Turn on the ignition but don't start the engine. NOTE! You can read the DTCs with the engine running and or driving down the road but it can distract you. BE careful! Some DTCs clear themselves when you turn the ignition OFF!

2) Press the RESET button to turn off any warning messages. (i.e. door open, trunk open ect)
3) Press and hold OPTIONS
4) While holding OPTIONS, press FUEL four times within a 10-second period.


Initially, on-board diagnostics go into an Automatic Mode which shows diagnostic codes in a pre-set sequence: PCM - TCS - RTD - BCM - IPC - RADIO - HVAC - LDCM - RDCM - SCM - RFA. All codes will be displayed for each. ( i.e. PCM = 4 codes) If none are present in a given module, you will see No More Codes on the display.
There are two kinds of diagnostic codes, Current and History designated with a letter suffix, “C” or “H”. A current C code indicates a malfunction is present and active in the module displaying data. A history code indicates a problem existed sometime in the last 40 or 50 ignition cycles. When not accompanied by a current code of the same number, it's potential evidence of a previous problem, now resolved, that was not removed by clearing the codes.
More likely it's an indication of an intermittent malfunction.
Intermittent codes are the most challenging of the diagnostics. An intermittent code may have happened once, may have happened more than once but is inconsistent or may be happening on a regular basis but not at the time the codes are displayed. History codes can also be caused by a current malfunction in a system that is not operating at the time codes are displayed. An example is the rear window defogger which doesn't operate until the Body Control Module detects engine rpm. For history codes set by a module that does not operate with the key on and engine off, a special diagnostic tool called a Scan Tester is necessary to properly diagnose the malfunction.
Once the system has displayed all modules, it goes into the manual mode which allows selection of each module using combinations of Driver Information Center buttons. Manual mode can also be entered during the automatic sequence by pressing any button except English/Metric (E/M). Once the display shows Manual Diagnostics, select a module by pressing the OPTIONS button to go forward or the TRIP button to go back. Once a module is selected, a code is displayed, and if more than one are present; press GAGES to go forward or FUEL to go back.
To exit the diagnostic mode at any time, press E/M. If you want to erase codes in a given module, press and hold the RESET button To reset the codes once in manual mode, press and hold RESET until it displays NO CODES Press OPTIONS to go to the next module. Repeat the steps until you have reset the codes in all the computer modules.
NOTE!! Only reset the codes IF you want to - it is NOT necessary to do this. Clearing a code does not repair a problem. You are simply erasing the evidence of it in the module's memory. If you clear the code/s, and extinguish the Check Engine Light, your emissions status ready will NOT allow you to pass an emissions test until you have completed the required driving cycles.
Once you have the codes, the next question is: What to do with the information?
First, consult the factory service manual. Any serious C5 Do-It-Yourself owner should invest in the Corvette Service Manual of the appropriate model year. The Service Manual is really a requirement if you want to understand and work on your C5. You can GOOGLE the DTC and also find information on it.




Here is very good site that explains the DTCs:


http://www.corvette-web-central.com/C5DTCcode.html


http://www.obd-codes.com/trouble_cod...d-ii-codes.php



Make sure to include the H or C suffix!!
Bill,
As usual thank you for your help
Reply
Old Sep 29, 2014 | 03:12 PM
  #4  
NOMOREWORK's Avatar
NOMOREWORK
Thread Starter
Racer
10 Year Member
 
Joined: Dec 2006
Posts: 459
Likes: 95
From: Chelsea Mass
St. Jude Donor '13-'14-'15
Default

Originally Posted by RicksRed 98
Bill,
As usual thank you for your help
OK Bill, Here goes
10 PCM P0751C
28 TCS C1221H C1222H C1255H C1281HC C1286HC C1288HC
40 BCM U1016H U1096H
Reply
Old Sep 29, 2014 | 03:40 PM
  #5  
3boystoys's Avatar
3boystoys
Melting Slicks
 
Joined: Jul 2012
Posts: 2,507
Likes: 9
Default

Originally Posted by RicksRed 98
Have to show my ignorance of computer controlled cars, my 98 has thrown a code which indicates that the torque convertor is not locking up. Can the fix be as simple as replacing the convertor or are there other factors or issues that cause this to happen?
Replacing the converter is not a trivial task my friend.
Reply
Old Sep 29, 2014 | 03:47 PM
  #6  
NOMOREWORK's Avatar
NOMOREWORK
Thread Starter
Racer
10 Year Member
 
Joined: Dec 2006
Posts: 459
Likes: 95
From: Chelsea Mass
St. Jude Donor '13-'14-'15
Default

Originally Posted by 3boystoys
Replacing the converter is not a trivial task my friend.
I know it's not, what I was trying to ask was it just the convertor that would cause this to happen or could it be something else?
Reply
Old Sep 29, 2014 | 04:57 PM
  #7  
Bluefire's Avatar
Bluefire
Le Mans Master
Veteran: Air Force
20 Year Member
Community Builder
Liked
 
Joined: May 2006
Posts: 7,876
Likes: 254
From: Hillsboro OR
Default

Is the brake pedal stop switch adjusted properly? If not, it can trigger the TCC to unlock.
Reply
Old Oct 1, 2014 | 05:06 PM
  #8  
NOMOREWORK's Avatar
NOMOREWORK
Thread Starter
Racer
10 Year Member
 
Joined: Dec 2006
Posts: 459
Likes: 95
From: Chelsea Mass
St. Jude Donor '13-'14-'15
Default

Originally Posted by Bluefire
Is the brake pedal stop switch adjusted properly? If not, it can trigger the TCC to unlock.
Thanks Bluefire I will check that.
Reply

Get notified of new replies

To Don't Have A clue

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-1

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-2

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-3

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
story-4

10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

 Joe Kucinski
story-5

How Much Horsepower Every Corvette Engine "LOST" in 1972

 Joe Kucinski
story-6

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-7

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-8

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-9

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo




All times are GMT -4. The time now is 08:37 AM.

story-0
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-1
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-2
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-3
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE
story-4
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years

Slideshow: 10 reasons why the C6 Z06 is still a performance benchmark after 20 years.

By Joe Kucinski | 2026-05-27 17:20:09


VIEW MORE
story-5
How Much Horsepower Every Corvette Engine "LOST" in 1972

Slideshow: How much horsepower every Corvette engine lost in 1972.

By Joe Kucinski | 2026-05-27 16:54:53


VIEW MORE
story-6
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-7
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-8
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-9
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE