PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

C5 PCM Question

Thread Tools
 
Search this Thread
 
Old Mar 9, 2011 | 11:14 AM
  #1  
MrVette83's Avatar
Thread Starter
Teching In
 
Joined: Mar 2011
Posts: 11
Likes: 0
From: Mt. Vernon, KY
Default C5 PCM Question

I am checking to see if anyone knows which pin on the PCM of a 2000 Corvette controls the cars TCS software and retards engine timing. I also need to know if the TCS program applies a ground to that pin like it does in an F-Body or is it a different set up? Thanks in advance.

Daniel
Reply
Old Mar 9, 2011 | 04:00 PM
  #2  
MrVette83's Avatar
Thread Starter
Teching In
 
Joined: Mar 2011
Posts: 11
Likes: 0
From: Mt. Vernon, KY
Default

To the Top.

For example on an F Body there's a pin on the pinout that you apply ground to and it will trip the timing retard side of the TCS. On a 1998 f-body pcm the pin number is an r30, on the 99 and up cars that pin is r53. I'm just trying to find out what number it would be for a 2000 MY C5 PCM. Thanks
Reply
Old Mar 10, 2011 | 09:37 PM
  #3  
Hodge's Avatar
On The Tree
20 Year Member
iTrader: (2)
 
Joined: Feb 2003
Posts: 137
Likes: 0
From: Fort Smith, AR
Default

No spark retard signal listed on a 2000 corvette PCM pinout.

PM me and I will send you a pdf of the pinout.
Reply
Old Mar 12, 2011 | 08:20 PM
  #4  
MrVette83's Avatar
Thread Starter
Teching In
 
Joined: Mar 2011
Posts: 11
Likes: 0
From: Mt. Vernon, KY
Default

Originally Posted by Hodge
No spark retard signal listed on a 2000 corvette PCM pinout.

PM me and I will send you a pdf of the pinout.
PM Sent
Reply
Old Mar 12, 2011 | 08:37 PM
  #5  
Hodge's Avatar
On The Tree
20 Year Member
iTrader: (2)
 
Joined: Feb 2003
Posts: 137
Likes: 0
From: Fort Smith, AR
Default

Check your mail. sent the pinout.
Reply
Old Mar 13, 2011 | 08:32 PM
  #6  
RENE'S RAGE's Avatar
9 Second Club
iTrader: (96)
 
Joined: Nov 2007
Posts: 2,387
Likes: 3
From: Memphis, TN
Default

Originally Posted by MrVette83
To the Top.

For example on an F Body there's a pin on the pinout that you apply ground to and it will trip the timing retard side of the TCS. On a 1998 f-body pcm the pin number is an r30, on the 99 and up cars that pin is r53. I'm just trying to find out what number it would be for a 2000 MY C5 PCM. Thanks
I hope you fix your problem.
I have a '99 TA, and have ask this question alot before, about to ground or not to ground the r53 pin in the PCM.
I have remove my TCS and just elminated that wire from the PCM.
Do I need to ground that pinout? With it not being grounded, will it retard timing. I have not driven the car after I did this, cars been down now for 2 years.
Thanks
Reply
Old Mar 13, 2011 | 08:37 PM
  #7  
RENE'S RAGE's Avatar
9 Second Club
iTrader: (96)
 
Joined: Nov 2007
Posts: 2,387
Likes: 3
From: Memphis, TN
Default

Oh yeah, How did you come up with your screen name.
Only year they didn't make a Vette.
I have a red '80 and a black '98.
Reply
Old Mar 29, 2011 | 08:03 AM
  #8  
MrVette83's Avatar
Thread Starter
Teching In
 
Joined: Mar 2011
Posts: 11
Likes: 0
From: Mt. Vernon, KY
Default

Originally Posted by RENE'S RAGE
Oh yeah, How did you come up with your screen name.
Only year they didn't make a Vette.
I have a red '80 and a black '98.
It is working correctly now. Thank you Hodge for the pinout diagram. It's a car I'm helping a buddy work on and the tuner actually used the diagram and isolated the problem, but I'm not sure how. Problem is now we may need to rethink the cam. The tuner is saying that the car isn't reaching it's full potential and the cam is too big for the intake. I'll start a separate thread for that though.

Yes, the 83 is for the absence of a Vette in 1983 due to the changeover from St. Louis assembly plant to Bowling Green. Every one of my friends calls me MrVette because I've been a Vette fanatic since I was 8. 26 now, still don't own one but it's on the horizon. In the process of buying a house now, but once the wife's car is paid off I plan to apply that money on a C5Z or possibly an LS3 C6 depending on what the market's like at that time.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo




All times are GMT -5. The time now is 12:23 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE