Hydraulic system, function overview: Notes
WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
1 - Convertible top compartment cover cylinder
2 - Main cylinder
3 - Bracket cylinder
4 - Check valve S1
5 - Solenoid valve F3
6 - Pressure regulation valve D2
7 - ABS Hydraulic Pump
8 - Two-way valve W2
9 - Pressure regulation valve D1
- On-board voltage in contact = flow
- Solenoid valve with no current = return open
10 - Solenoid valve F2
- On-board voltage in contact = flow
- Solenoid valve with no current = return open
11 - Pump pressure
12 - Return pressure
13 - Line depressurized
14 - Two-way valve W1
15 - Solenoid valve F1
- On-board voltage in contact = flow
- Solenoid valve with no current = return open