If the 'ck eng' light doesn't even come on for a bulb-check when the key is turned on to 'run', there is another problem. A power or ground or a short-to-ground in either of the 5 or 8 volt sensor supply lines will put a 'good' PCM into protection instead of the possibility of damaging it. It will also keep the vehicle from starting and from communicating with your scan tool.
I checked the 1995 Powertrain Diagnostic Procedures book and there should be just the one OBD2 DLC underdash connector for domestic JA (Cirus, Stratus and Breeze) vehicles. The FJ DiamondStars had the 2 underdash scan tool connectors and a DRB adapter was needed to access the DiamondStar/Mitsubishi PCM.
If you Google for issues reading fault codes and connecting to PCM's on 1995 OBD2 vehicles, you will find more information.
while earlier poster is correct that OBDII was not available untill 96
some 95 had it. Try coding your car as a 96 not 95. That is what I
(and the dealer) do on my 95 Neon.
This chapter explains how to test 1994–later OBD-II vehicles. Most vehicles are equipped with
two testing modes: Generic OBD-II and Enhanced OBD-II. The EPA requires all 1996–later
vehicles sold in the USA to meet OBD-II standards.
Some 1994–95 vehicles may appear to be OBD-II equipped, they may not be fully compliant.
Check the VECI label to determine if a 1994–95 vehicle is an OBD-I or OBD-II model.
The following information and procedures are specific testing in Generic OBD-II mode. Forgeneral scan tool testing information, see the user’s manual for your diagnostic tool.
Many aftemarket/generic OBD2 scan tools had trouble reading these early OBD2 vehicles. The DRB III would be certain to get into the PCM (if it has the ability to communicate) and find the problem. I hate to suggest a tow and diagnostic by the dealer, but it may give you your answer.