DTC C2380-01: ABS/TCS/ESP Valve Error: General Description
The IBAU is composed of a Electronic Control Unit (ECU) and an Hydraulic Control Unit (HCU), so the IBAU hardware includes all solenoid valves inside the unit as well as the ECU.
Solenoid valves are switched to ON, OFF by IBAU when the ABS is activated. Solenoid valves function is to increase, decrease or maintain the hydraulic pressure supplied to a wheel cylinder.