ok did some research.

its the Supplemental Restraint System (SRS)

The Honda Service Manual says:
1. Turn the ignition switch OFF, and wait for ten seconds.
2. Connect a short to the Memeory Erase Signal (MES) connector.
3. Turn the ignition switch ON (II).
4. The SRS indicator light comes on for about six seconds and then goes off. Remove the short from the MES connecotr within four seconds after the SRS indicator light went off.
5. The SRS indicaotr light comes on again. Reconnect the short to the MES connector within four seconds after the SRS indicator light comes on.
6. The SRS indicator light goes off. Remove the short from the MES connector within four seconds.
7. The SRS indicator light indicates that the memory is erased by blinking two times.
The ten second delay at the beginning is very important or the memory will not reset.