When you buy a scanner like Autoxray , it comes with

GM OBDI cable (12 pin ) '82-94
OBDII cable '96 and later
GM OBDII Manufacturer Specific Cable (16 pin ) for the '95

 

The crash/pre-crash data retrieval capability appeared on Corvettes beginning in 1997, according to Vetronix's website:

http://www.vetronix.com/diagnostics/...icle_list.html

This data is stored in the airbag control module. A good FAQ list is available on Vetronix's site:

http://www.vetronix.com/diagnostics/cdr/faqs.html

Be well,

SJW

 

I'm a big OBDII fan. I love the cylinder misfire feature, the code will send you to the exact cyclinder and it's up to you to figure out fuel or ignition. Still, very good system. The system does a much better job of diagnostics and can get you very close to the problem. Keep in mind there are two "levels" of OBD II codes. There are generic codes common to all systems (0xxx) and specific manufacturer proprietary codes (1xxx). GM makes a very good training manual explaning OBDII codes and is available through Service Technology Group publications.

As a side note, bi-directional OBDII scanners are more expensive. That said, used Snap On MT2500 scanners can be had for under $700 with a descent cartridge. Mine has paid for itself since I have GM, Ford, and MOPAR products, all covered with one cartridge.

I wouldn't select a car solely based on OBDII compliance, but if two cars were really close, I'd take the OBDII car.

dlmeyers 90 coupe (my only OBD 1 vehicle) zf6 3speed shocks

 

That's what I was thinking, it made diagnostics alot easier. How does the "cylinder misfire" work on OBD I cars? Does it just tell you to look at all of the cylinders?

Either way I guess. I'm sure OBD II has some downsides. I'll probably concentrate on 96 vettes, and keep an eye out on 95's.

thanks

 

Now THAT's interesting. I did not know that. It's something to consider on a newer car. Do you know if it is industry wide or only GM? Thanks again for the enlightement.

 

See the Vetronix web page at the link I provided above for a complete vehicle listing.

Be well,

SJW

 

Technically speaking, NO you cannot.

My interpretation of your answer is that the socket tells you what scan tool to use, and that is incorrect. The socket has nothing to do with the scan tool protocol that you select. The OBD1 protocol on 95 Vettes does use an OBD2 connector, but OBD1 and OBD2 protocols are NOT interchangeable. You MUST have an OBD1 capable scan tool with the appropriate cable/connector.

As rodj mentioned, you can buy scan tools that work with both protocols automatically and use the OBD2 cable/connector or OBD1 cable/connector interchangeably, but the internal software used for the scan is different. Depending on the scan tool used you may not notice the difference, but if you were to buy an OBD2 scan tool without built-in OBD1 support, solely because of the OBD2 connector, expecting it to work on an OBD1 vehicle, you will be severely disappointed.


Significantly less than 100% accurate.

As Red Dwarf, FD2BLK, RAGOVET, and some others have stated, it is not a simple case of all 95 and earlier vehicles being OBD1. Federal law required that ALL 96 model year vehicles sold in the US be OBD2 compliant. There was no law stopping the car manufacturers from implementing OBD2 sooner than the 96 model year. So, starting at some point in the 94/95 production runs, GM began using OBD2 connectors in some car lines. There is no verifyable number of units that shipped this way that I know of. It wasn't required by law to use OBD2 connectors for the 94/95s, so it did not need not be recorded or reported. So, most all 95 Vettes have OBD2 connectors and OBD1 protocol systems.

GM was legally able to implement the OBD2 protocol at any time prior to the 96 model year and it is my understanding that in some 95's it did implement partial "OBD2 capability" using the OBD1 protocol, as well as some production of 95s with full OBD2. All 94s used OBD1, even though they had the OBD2 connectors and additional O2 sensors.

As has already been mentioned, the ONLY sure way to know if your 95 Vette is using the OBD1 or OBD2 protocol is to look at the Vehicle Emmisions Sticker on your car.