Malfunction checking control system which checks identification data stored in RAM

Claim 1

A control system for a vehicle safety device comprising: an acceleration sensor; a microcomputer; and reset means for outputting a reset instruction signal in order to reset said microcomputer, said reset means including a power-on reset circuit and a watch dog timer and said microcomputer comprising: (a) a RAM; (b) first judgment means for judging whether or not an identification data is stored in a specific area of said RAM after said microcomputer is reset responsive to the reset instruction signal; (c) failure judgment means for judging whether or not said acceleration sensor is subjected to a failure when said first judgment means judges "NO" that there are no identification data stored in the specific area of said RAM; (d) writing means for writing the identification data into the specific area of said RAM when said first judgment means judges "NO"; and (e) acceleration evaluation means for integrating an acceleration data from said acceleration sensor to obtain an integral value, judging whether or not a collision of said vehicle has occurred based on said integral value, and outputting a trigger signal to activate said vehicle safety device when said acceleration evaluation means judges that a collision of said vehicle has occurred; said acceleration evaluation means being executed after said failure judgment means is effected when said first judgment means judges "NO", said acceleration evaluation means being executed without said failure judgment means being effected when said first judgment means judges "YES", that there are identification data stored in the specific area of said RAM.