the SRS control unit is located under the stereo on your car . . .reseting the ECU won't do anything for you. . . you can read the code from the same ECU service connector (passenger side under dash) however to reset the light follow these steps
1. turn ignition switch off, remove ECU service connector
2. connect (jump) the MES connector (this is 2 pin connector wrapped on yellow plugged in the front of the underdash fuse box)
3. turn ignition switch on
4. SRS light will come on for 6 secs then go out, remove the jumper within 4 secs after the light goes out.
5. the SRS light will come on again, reconnect the jumper within 4 secs after the light has come on.
6. the SRS light will go off, remove the jumper with in 4 secs after the light has gone off.
7. the SRS light will blink to times indicating the memory is reset.
you may have to try it a couple times, it can be tricky, but i sounds alot more difficult than it is, good luck