Very simple process, guess the hard part is just finding the plug. From the last, 97 Subuar I did this on:
Reading the codes was really easy actually once you decipher the Rosetta stoneish manual also known as the FSM and realize by "DIAG CONNECTOR" they really just mean a bare pin that's taped up and unseeable and not labeled like all the other connectors in the FSM making it unrecognizable - the others all have specific, traceable labels like B82 and such - the B81 DIAG CONNECTOR is lacking in details and info like all the rest.
There's a 6 pole pin connector up under the cover below the steering wheel - sort of "above the gas pedal" next to the center console side of the drivers foot well area. there's a few dangling plugs there, two green plugs, a black plug or two...woah there's a hummingbird 8 feet from me, cool - and a bunch of connectors. The black 6 pole connector (2 on top 4 on bottom) is your money maker. Only had three wires going to it (but that could differ slightly based on options probably).
Grounding the blue wire (top left facing it) spits the code out on the AirBag light. There are two diagnostic connectors - they are just pins and taped to the same harness that plug is on - pull the tape and those pins are exposed and you can use them to ground it. Without the pins you can just ground it yourself.
The grounding pin is provided by Subaru, just untape and ground it.
The FSM would certainly list where the connector/pin is if you have that and it's different from my description.
Originally posted by SubaCool
Wonder if anybody has any more info on the DIY SRS diagnosys (code check)?
Other than finding the connector/pin to ground is there something else you don't understand?
It's actually really simple. Ground pin, count flashing lights, just like it says. Nothing to it really...except finding the connector.