Should be the EBC310 ABS module.
Ya just ive searched for a scan tool for obd1 doesnt seem to exist ever since obd2 came out
The Axle + Brake forum alone has multiple tools mentioned, useful for bleeding ABS. Which, again, is where this thread belongs.
to bleed the abs module im guessing its the black cap on the side of it, looks like a small pin ?
Absolutely not. There are videos on Youtube showing that the "pin" can release air. It was not effective on my '97 which uses that same EBC310 module; I got NOTHING out of that "pin".
In fact, that "pin" is the stem of the metering (holdoff) valve, which is part of the combination valve. It's bolted to the ABS unit, but not
part of the ABS unit. The metering valve affects the front brakes ONLY.
You need a scan tool to properly bleed the ABS unit. Instructions attached.