ODB2 Reader - CorvetteForum - Chevrolet Corvette Forum Discussion

Notices
C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

ODB2 Reader

Reply

 
 
 
Old 07-09-2018, 05:20 PM
  #1  
2LZ
CF Senior Member
Thread Starter
 
Member Since: Jul 2017
Location: Volcano CA
Posts: 134
Thanked 23 Times in 19 Posts
Default ODB2 Reader

After our last day excursion with the '96 LT1, I popped a CEL prior to getting home. Car still ran fine. Just so happened, I had a Super Coupon to the OBD2 tester at Harbor Freight so I snagged it. I know...I know... HFT is not the best stuff but I don't use my tools for a living and I've had good luck the three times a year I need them.

So, unwrap the tester, plug it in, turn on key. Nothing. Recheck the plug, fiddle, re-plug, etc... No go. Crap, bad tester out of box. Oh well. It's HFT. What did I expect?
Just for grins, I walked out to my '97 K1500, plug it in and VIOLA! It lit right up. I ran through the simple menu's, cleared it all and unplugged it. Worked great.

Back to '96 Corvette. Plug it in. No go.
After digging out the "war and peace" version of the FSM (parts 1 and 2) and nosing around to try to locate the unusual and obscure technique of simply reading and clearing codes, i threw in the towel and disconnected the battery for a while. Reconnected. No CEL. Drive it around a while and it never came back on.

Anyone have any idea why it won't light the code reader? It's supposed to work '96 and newer.
2LZ is offline  
Reply With Quote
Old 07-09-2018, 07:00 PM
  #2  
billschroeder5842
ZenVette Master level VII
Support Corvetteforum!
 
billschroeder5842's Avatar
 
Member Since: Mar 2016
Location: Southlake, TX
Posts: 3,283
Thanked 418 Times in 380 Posts
Default

Originally Posted by 2LZ View Post
I know...I know... HFT is not the best stuff.........Anyone have any idea why it won't light the code reader?.
Go to Auto Zone and ask them to pop on their reader. If the AZ one works you know your answer.
billschroeder5842 is offline  
Reply With Quote
Old 07-10-2018, 10:35 AM
  #3  
pcolt94
CF Senior Member
 
pcolt94's Avatar
 
Member Since: Jan 2006
Location: Orlando FL
Posts: 5,271
Thanks: 0
Thanked 114 Times in 98 Posts
Default

The 96 was the first year of OBD2 and things were not fully up to speed. On most modern cars the 12 volts power was built into the connector for the scanner. I believe for the 96 corvette the power for the scanner was not supplied by the ALDL connector back then, but external power was used to run the scanner.

My Tech 1 which was made mainly for OBD1 requires external power from the cigarette lighter. Eventually the software for OBD2 was released and the adaptor cables for OBD2 however it still uses external power which was by design back then. Thatís how the dealers did it with the factory tool.

Probably a little later on the car makers and test equipment makers added the pin in the ALDL connector for power which was probably in the standards they were going to built to.
pcolt94 is offline  
Reply With Quote
Old 07-10-2018, 09:32 PM
  #4  
Hershey71
CF Member
 
Hershey71's Avatar
 
Member Since: May 2015
Location: Nebraska
Posts: 52
Thanked 4 Times in 4 Posts
Default

Originally Posted by 2LZ View Post
After our last day excursion with the '96 LT1, I popped a CEL prior to getting home. Car still ran fine. Just so happened, I had a Super Coupon to the OBD2 tester at Harbor Freight so I snagged it. I know...I know... HFT is not the best stuff but I don't use my tools for a living and I've had good luck the three times a year I need them.

So, unwrap the tester, plug it in, turn on key. Nothing. Recheck the plug, fiddle, re-plug, etc... No go. Crap, bad tester out of box. Oh well. It's HFT. What did I expect?
Just for grins, I walked out to my '97 K1500, plug it in and VIOLA! It lit right up. I ran through the simple menu's, cleared it all and unplugged it. Worked great.

Back to '96 Corvette. Plug it in. No go.
After digging out the "war and peace" version of the FSM (parts 1 and 2) and nosing around to try to locate the unusual and obscure technique of simply reading and clearing codes, i threw in the towel and disconnected the battery for a while. Reconnected. No CEL. Drive it around a while and it never came back on.

Anyone have any idea why it won't light the code reader? It's supposed to work '96 and newer.

Because it's a Harbor Freight OBDII reader crazy: :. The one I had wouldn't work either so I ended up paying 3 times the price of the Harbor Freight and have one that's 100 times better. It's an AUTEL MX808 and will read every sensor and module in the car. It's also a small 7" tablet and is very versatile best money I ever spent for a diagnostic tool
Hershey71 is offline  
Reply With Quote
Old 07-12-2018, 08:38 AM
  #5  
MatthewMiller
CF Senior Member
 
MatthewMiller's Avatar
 
Member Since: Aug 2015
Location: St. Charles MO
Posts: 1,532
Thanked 218 Times in 184 Posts
Default

The little bluetooth and wifi readers that plug in to the port and send the info to your phone will work in a 96. I'm not sure if they'll give all the info you seek, but they will read codes and can log some data while driving.

Last edited by MatthewMiller; 07-12-2018 at 08:39 AM.
MatthewMiller is offline  
Reply With Quote
Old 09-04-2018, 10:23 AM
  #6  
2LZ
CF Senior Member
Thread Starter
 
Member Since: Jul 2017
Location: Volcano CA
Posts: 134
Thanked 23 Times in 19 Posts
Default

Success! I finally pulled and tested every fuse in the little panel on the passenger side dash.
For those who want to know, as opposed to all the You Tube vids for most cars that say the power to the OBD2 connector usually runs off the "cigar" fuse, on a 1996 C4, the OBD2 connector is powered by Fuse #36 "RH CTSY".
In short, if your door courtesy lights are out, your OBD2 connector won't work either.
2LZ is offline  
Reply With Quote
The Following User Says Thank You to 2LZ For This Useful Post:
RalfKramden (09-05-2018)
 
 
 


Thread Tools
Search this Thread
Quick Reply: ODB2 Reader


Sponsored Ads
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: