ABS system in VSC chip?
 

Page 220 describes the ABS system, but I only see a chip labeled VSC.

http://www.ft86club.com/files/BRZwiringi.pdf

I am no electrical engineer, but are the ABS/EBD/VSC systems all in one chip?

All those systems ABS/EBD/VSC and the electronic LSD (diff) and part of the Traction control all rely on controlling brake application to individual or multiple wheels. Appears its all done by one module. That module would also talk to ECU to reduce power in some circumstances and likely the Auto-trans control module in Auto cars