Conversions & Swaps LSX Engines in Non-LSX Vehicles
Sponsored by:
Sponsored by:

Obd 2 not working

Thread Tools
 
Search this Thread
 
Old Feb 26, 2012 | 05:51 PM
  #1  
971of1000's Avatar
Thread Starter
Teching In
 
Joined: Aug 2011
Posts: 12
Likes: 0
Default Obd 2 not working

I have been working on getting everything in my car actually working since the last owner did a poor job on this car. I tried hooking up the obd 2 port and have had no luck. The serial data wire is hooked up to blue pin 58. There is two wires that are grounded and one that is a constant 12v. I am not sure why it is not working. I have looked at several diagrams and followed them. Could the PCM not be putting out the signal? Car is an 89 rx7 with an 02 ls1 in it
Reply
Old Feb 26, 2012 | 06:01 PM
  #2  
the_merv's Avatar
Banned
iTrader: (88)
 
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
Default

2- PCM 58
4,5- Grounds
16- 12v constant.

Are you turning the key on when trying to read it?
Reply
Old Feb 26, 2012 | 06:07 PM
  #3  
971of1000's Avatar
Thread Starter
Teching In
 
Joined: Aug 2011
Posts: 12
Likes: 0
Default

Yeah that is key on. Tried with the motor running and just in key on.
Reply
Old Feb 27, 2012 | 03:51 AM
  #4  
chrisfrost's Avatar
TECH Fanatic
15 Year Member
iTrader: (8)
 
Joined: Nov 2009
Posts: 1,112
Likes: 16
From: phx the cactus patch
Default

I've seen where some of the pins in the obd connector under the dash have gotten pushed in a little and not making connection before ,,,,,,,,You never know it is a possibility in You're case . Good luck
Reply
Old Feb 27, 2012 | 07:51 AM
  #5  
psiconversion's Avatar
LS1Tech Sponsor
15 Year Member
iTrader: (5)
 
Joined: Feb 2007
Posts: 1,310
Likes: 11
From: Brick, NJ
Default

What type of scanner/programmer are you trying to use? Also, what is the application?

Jon
PSI
__________________

Your Source for LSX Conversion Parts!
www.psiconversion.com

Ebay Store
Facebook/psiconversion
Instagram/psiconversion

'Dont Let EFI Pass You By!'
Reply
Old Feb 27, 2012 | 09:35 AM
  #6  
971of1000's Avatar
Thread Starter
Teching In
 
Joined: Aug 2011
Posts: 12
Likes: 0
Default

I have been trying to connect to the ones that oreillys auto carry. I think they are equus. I can try another. Are there some that dont work with these pcms?
Reply
Old Feb 27, 2012 | 12:15 PM
  #7  
Andy1's Avatar
TECH Resident
20 Year Member
 
Joined: May 2004
Posts: 792
Likes: 2
From: SoCal
Default

Mine doesn't work either. I get a "data error". Mine is wired as described above, but no luck. OBDII reader works fine on my other cars.

Andy1
Reply
Old Feb 27, 2012 | 12:36 PM
  #8  
psiconversion's Avatar
LS1Tech Sponsor
15 Year Member
iTrader: (5)
 
Joined: Feb 2007
Posts: 1,310
Likes: 11
From: Brick, NJ
Default

Scanner shouldnt be the issue. What is the application? What PCM are you using?

Jon
PSI
__________________

Your Source for LSX Conversion Parts!
www.psiconversion.com

Ebay Store
Facebook/psiconversion
Instagram/psiconversion

'Dont Let EFI Pass You By!'
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
Old Feb 27, 2012 | 01:53 PM
  #9  
971of1000's Avatar
Thread Starter
Teching In
 
Joined: Aug 2011
Posts: 12
Likes: 0
Default

The motor, harness and pcm are out of an 02 trans am. Could it be possible there is a ground or 12v not hooked up correctly to the pcm but the car still running fine? A friend of mine said that his 02 camaro works with all the scanners at his shop except one. I think it may be possible that the pcm will not interface with every scanner.
Reply
Old Feb 27, 2012 | 05:14 PM
  #10  
the_merv's Avatar
Banned
iTrader: (88)
 
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
Default

Is everything in the Harness wired correctly..as in when you installed it?
Reply
Old Feb 27, 2012 | 05:27 PM
  #11  
bad_408_vert's Avatar
TECH Junkie
15 Year Member
Liked
Loved
Community Favorite
iTrader: (6)
 
Joined: Jan 2009
Posts: 3,416
Likes: 10
From: Queens, NYC
Default

This may sound over simplistic , but did you check your fuses?
Do the 12v chargers work, in case you have them in your car?
Reply
Old Feb 27, 2012 | 07:29 PM
  #12  
971of1000's Avatar
Thread Starter
Teching In
 
Joined: Aug 2011
Posts: 12
Likes: 0
Default

fuses are fine. I can put a multimeter up to the correct pins on the plug itself and get both good power and good ground.
Reply
Old Feb 27, 2012 | 07:51 PM
  #13  
the_merv's Avatar
Banned
iTrader: (88)
 
Joined: Mar 2006
Posts: 21,019
Likes: 893
From: The Beach...
Default

Check the #2 wire..make sure it goes to 58 and has continuity.
Reply
Old Mar 2, 2012 | 02:28 PM
  #14  
971of1000's Avatar
Thread Starter
Teching In
 
Joined: Aug 2011
Posts: 12
Likes: 0
Default

Got the Obd port working with the scanner at autozone. None of the other brand scanners worked. Anyways once I got it hooked up and read the codes, I got 13 codes. Most of them have to do with egr and emissions related. However I got three that were a little troubling and may be an indecation as too why my car is running so poorly.

I got:
injector circuit malfunction
bank 1 o2 heater malfunction
maf circuit malfunction
clutch switch malfunction

I am not sure which bank is bank 1 on the o2 sensor?
I am going to swap mafs and see if this is corrected. Maybe it got dirty?
I have no idea what to do with the injector circuit malfunction.

I assume the clutch switch does nothing for the performance of the engine?
Reply




All times are GMT -5. The time now is 11:00 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