Hi!
My 01 DII, had the same problem. It hapenned after a higway trip here in Portugal, i´ve packed some stuff under the front seats. The result as been a SRS light on

how? It simply as disconnected the yellow connector from SRS/Airbag harness. The mecanic adviced me to check this connections before any action or test. And he was wright, the problem was just a bad contact in the connector, i've unplugged and plugged it again, and problem solved! You should check yours too.
Best Regards