N875ED

I have a 1995 LT1 and tried to use my Actron CP9580 code reader (OBD2) but it only scans cars back to 1996. (I thought a technically advanced car like a Corvette might have actually switched to OBD2 earlier than other cars.)

So, do I truly have an OBD1 car as I expect, or am I missing something? If OBD1, does anybody have a recommendation on a scan tool?

Thanks!

rjacobs

96 was first year of OBD2, but even it is "weak" OBD2.

RVAVette

pcolt94

This is the initial way to go and works well. It will give you any codes in all the modules where if you had a basic OBD1 scanner it would just give you the codes in module 4 for the PCM.
Using the FSM there is a huge amount of information that can be seen other than just codes but you have to have the information and learn how to do it.

STL94LT1

94/95 cars were OBDI with OBDII ALDL connectors.

N875ED

Kevova

OBD2 was dictated by the government.The connector was changed because PCM is reflashed there is no chip. The older style connector is used with Ecms with replaceable PROM ( chip)
OBD1 scanners require the correct cartridge :GM powertrain thru 1995. Snap On MT2500, OTC Monitor 4000, Tech1( The GM scanner) and Tech2 are all good scanners.You will need the 16 pin OBD2 style connector or adapter. There are also scanners that will do both 1 & 2. Paperclip will give you codes, a scanner will give up data. EBay, Craigslist, & Pawn shops are possible sources.

Matt81

My dad bought a 95 Firebird Formula a couple of years ago with the LT1 engine. It had a couple of codes i wanted to check out, came across a really excellent bit of software called Scan9495. Link is here. Site includes details on building a cable as well. I think I got the parts for less than $10 thru ebay.

Software shows live data feeds from all the modules, as I recall.

I would assume this works for the same year Corvettes. If course, I also know what happens when you assume...

Hope this helps some!

aklim

1320 Electronics has a bluetooth thing that you can use with an android phone and the ALDLScan is free, IIRC.

belairbrian

No counting flashes, the codes will be displayed where the speed normally is in the Instrument cluster LCD.