Kevin
Administrator
- Joined
- Jul 28, 2008
- Messages
- 7,153
- Location
- Sydney, Oz
- Car Year
- MY'03
- Car Model
- Forester
- Transmission
- A/T
My understanding of the way the hill holder works is that there is a PHV (Pressure Hold Valve) attached to the brake master cylinder which activates when the clutch and brake are depressed and holds the brake pressure until the clutch is released. A "PHV" cable is connected to the clutch pedal to facilitate this function. In simple terms the PHV keeps the brakes on when stopped.