9-3 (9440) L4-2.0L Turbo (2.0 HOT) (2003)
will cease and the brake function will be selected. During the delay that may arise, the check valve that is located in parallel with the pressure relief valve
will prevent the brake function being affected by leading the brake pressure to the wheel.
The ESP unit contains a brake pressure sensor that measures the input brake pressure from the master cylinder primary circuit. This information is used
by the control module to apply the correct brake pressure while ESP modulation is active.
1
Valve body
2
Motor
3
Pump
4
Inlet valve
5
Outlet valve
6
Pressure relief valve
7
Pressure increase valve
8
Pressure chamber
9
Accumulator chamber
10
Brake pressure sensor
Power supply, ground and bus communication