OBD 1 Scanner

[b2thxtrm3]

I am looking to buy a scanner for 92 LT1. After reading through some old forums I saw that someone recommend autocheckup.net and had purchased a refurbished Autoxray XP240 Scanner. There are more refurbished scanners for purchase. However, I did not see any replies to the forum stating that this was a good or bad scanner. My service ASR light has been coming on after I have been cruising around for about 20 minutes and then sitting at a stop light. Then the security light blinks. I want to get a scanner to check the codes but do not want to spend big money for a fancy schmancy scanner.

Any suggestions?

 

[Ruby Fan]

I bought my scanner at Sears, but that was years ago. Only about $30. It reads and gives you a number that you look up in service manual. I don't know if they still carry OBD 1 scanners. There is suppose to be another way to retrive codes: at any good auto store like Pep Boys or Auto Zone, there is a cheap connector(about $5) that plugs into your Diag. Center, which essentially jumps the pins, which makes the flashing sequence start, then you count the flashes. The first set of flashes tells you that it is starting, I think you get a code '23' to start, then the next set is the error code flash. So flash flash flash (pause) flash flash, would be code 32. I also heard that you can jump the pins with any kind of metallic object, but that requires steady hand and patience, and not worth the trouble.

 

[Vettelt193]

I am looking to buy a scanner for 92 LT1. After reading through some old forums I saw that someone recommend autocheckup.net and had purchased a refurbished Autoxray XP240 Scanner. There are more refurbished scanners for purchase. However, I did not see any replies to the forum stating that this was a good or bad scanner. My service ASR light has been coming on after I have been cruising around for about 20 minutes and then sitting at a stop light. Then the security light blinks. I want to get a scanner to check the codes but do not want to spend big money for a fancy schmancy scanner.

Any suggestions?

1992 didn't have OBD yet.

All you need is a paperclip... run a search in these forums to see if you can find instructions. (i know they are in here)

 

[fast.asleep]

I am looking to buy a scanner for 92 LT1. After reading through some old forums I saw that someone recommend autocheckup.net and had purchased a refurbished Autoxray XP240 Scanner. There are more refurbished scanners for purchase. However, I did not see any replies to the forum stating that this was a good or bad scanner. My service ASR light has been coming on after I have been cruising around for about 20 minutes and then sitting at a stop light. Then the security light blinks. I want to get a scanner to check the codes but do not want to spend big money for a fancy schmancy scanner.

Any suggestions?

I picked up an autoxray 240 a couple of years ago and I love it. (It was pretty cheap too ) I finally bought it after paying $600 for what I later found out to be a couple of faulty relays... live and learn I guess.

It has come in quite handy as I have another GM OBD 1 vehicle so it's paid for itself.

I don't know what would cause your security light to come on when the car is running and I have no experience with the ASR light. (someday I'll get into the 90's )

Someone should chime in soon

W

 

[Hrtbeat1]

1992 didn't have OBD yet.

'92's were OBD 1

OBD 2 was on some '95 and most '96 cars

 

[Vettelt193]

I thought 94/95 was OBD1, 96 was OBD 2, but pre 1994 was not OBD:confused

 

[Hrtbeat1]

'95 was a weird year I think it was actually an OBD 2 with an OBD 1 connector. Some cars are OBD 1 and others are OBD 2 so it can be quite confusing. The actual OBD 2 started with '96. The earlier cars were considered OBD 1, I think from '84 thru '94/'95.

I may be incorrect but I believe this is right.

 

[fast.asleep]

I thought 94/95 was OBD1, 96 was OBD 2, but pre 1994 was not OBD:confused

I think Vettes have had OBD since '85 (I'm not sure if '84's did) I can tell you that '87 definitely did

 

[C4ME]

Why, Yes, ODB I was used on all vettes from 84 to 91 I believe. I am sure that it was used in 86 (my car) and I have built my own cable and use a piece of freeware a guy online wrote. Just yesterday I finished my cable for all of 9 bucks of parts from an electronic store and was reading all kinds of cool data from my vette. The website to start at is http://web.telia.com/~u60505093/index.htm There are lots of folks out there writing SW and making hardware. I have run across websites where folks are burning their own proms.

Now on your 92, I believe chevy made a leap forward with ODB II in 92 with the advent of the LT1. The rest of automobiles swithed to the common standard of ODB II in 96'. Autozone sells a ODB II scanner for ~ $120. Don't know what all it does.

Merry Christmas
Joe

 

[jmccloud]

Obd

The 95 had OBD I but with OBD II connector. The OBD II came on 96 models.
The 'shop' manual or two volume 'service manual' tells how to access the codes and display them on the dash.
The ASR and antilock brake systems require a plug in module that's usually added cost for most outboard scanners. In OBD II (96 and newer), the outboard scanner and modules are needed to reset some codes.
So make sure you buy only what's needed (get the service manuals first) and the correct modules for the scanner.

 

[caninelver]

obd question

will a obd1 tell you if and where you have a vacuum leak?

 

[Robertwav1]

Odb 2

Seems the best way to go about this is to use a notebook (if you have one) to diagnose problems. Just got software from "autotap.com" for ODB 2 stuff. Looks good but have to spend some more time with it. The vette "93" is ODB 1. I know Mid-America had software one time for about $400. One thing I do know is that a vacuum leak will have to be figured out and this may very well be through faults that are detected from bad sensor readings. The software tells you about sensor readings but it's up to you to do the tests and figure out whether the sensor is actually bad (physically testing) or it is reading wrong due to another problem.

 

[C4ME]

ODB I

Yes, I am an idot...correct all to OBD!

Joe

 

[C4ME]

OBD, OBDI, life goes on...La la la la life goes on!

 

[Tim Scales]

ALL 92 C4's were OBD1. You can use a paper clip as one suggested or you can go to Advance or Autozone and they will give you a "Key" that you insert into the ALDL usually it is the top two terminals on the right side of the connector. Then you turn the switch on, but DO NOT START the engine. The first thing you will notice is that the cooling fans will come on. And once the system goes through a series of checks the SES light will blink once and then twice. That means code 12 which means it is in self check mode. Code 12 will flash 3 times. Then if the ECM has any stored codes the codes will appear just as the code 12 did. In other words if you show a code 42 the SES light will blink four times in rapid sucession and then wait a sceond and then it will flash/blink 2 times in rapid sucession. Each cose will repeat 3 times. When all the codes have been given the SES light will return to the code 12. You can retrieve the codes using this method. HOWEVER if you are experiencing a problem with the SERVICE ASR, you most likely will not be able to retrieve this code as the ASR has a completely different CCM and is not connected with the ECM or SES light system. There may be certain "Other" terminals on the ALDL that you can cross that will display these type codes but I have never had problems with my ASR except for when I would hit a really rough spot of road and it would try to go crazy. But once I turned the engine off and restarted the problem would go away. I hope this is helpful. If you need I will look in my shop manual on the 92 and see what I can come up with about servicing the ASR if you are still having the problem. If you's like you may e-mail me at scalestim@msn.com Good Luck, Tim

 

[Hib Halverson]

'95 was a weird year I think it was actually an OBD 2 with an OBD 1 connector. Some cars are OBD 1 and others are OBD 2 so it can be quite confusing. The actual OBD 2 started with '96. The earlier cars were considered OBD 1, I think from '84 thru '94/'95.

I may be incorrect but I believe this is right.

This thread has gotten way off the subject of the original question, but let me address the above, first.

Corvette was part of GM's "early roll-out" of OBD2. Starting in 1994, Corvettes have the 16-pin DLC (which some refer to as an OBD2 connector) rather than the 82-93 12-pin DLC. 94s and 95s have partial OBD2 capability but it is only accessible with a scan tester which supports OBD2 functions and none of the OBD2 diagnostics in those MYs will turn on the MIL. Only the basic OBD functions (some call this "OBD1" though there is no such designation) typical of 82-93 will turn on the MIL. The only reason OBD2 functions were present was to give GM some field experience with the system which become manditory in 96. Whenever a car which was part of the early roll-out came in with an engine light on, not only did techs diagnose and repair that, but they used their testers to look at the OBD2 side of the system to see how it reacted to the problem. 94s and 95s do not display powertrain DTCs by flashing the check engine light.

Now, as for scan testers which are not "fancy schamancy". If you buy a cheap tester, you're going to get results comsurate with the price you paid. Most low-cost testers support powertrain only. That is, they do not support the diagnostics in the chassis or body computers and, thus, cannot display ABS/ASR codes.

In the factory service manual for the model year in question, you'll find the instructions on how to read fault codes from the ABS controller and the repair procedures required to eliminate the problems. One place to start is to read instructions in the service manual section on the IP display becaise the IP can be used to read some DTCs set by the chassis and body computers.

 

[92conv]

...Well put. :cool