I see in my 96 Service Manual a "Air Bag Dianostic Monitor Diagnostic Trouble Code Priority Table" chart it says it is 4th lowest priority out of 21 codes. Fault Description: Air Bag Dianostic Monitor Internal Thernal Fuse- Fuse Blown due to Intermittent Short to ground. They mention, "The Diagnostic monitor only flashes a code 51 when the thermal fuse is blown and the short to ground is not present. Do not replace the Dianostic monitor until serviced. Consult OASIS for shorted wiring information".
If your fixing yourself I recommend getting A CD-ROM Service Manual from Todd R. on these Boards. Ed