Dynamic Response Valve Block: Notes

The valve block is located below the left hand sill of the body and is secured via a bracket with four bolts to the body. Three rubber bushes isolate the valve block from the bracket to prevent hydraulic noise from transmitting through the body.

The valve block controls hydraulic pressure to each actuator through two solenoid-operated proportional directional control valves. A solenoid-operated pressure control valve regulates the required pressure in the system. All three solenoid valves are controlled by signals received from the Dynamic Response Control Module. Five pressure transducers monitor the pressure generated by the Pressure Control Valve (PCV) and the pressure in the individual actuator lines.

The valve block also contains a Safety Control Valve which is closed when the vehicle is stationary and open when the vehicle is moving.

All solenoids are non-serviceable except the Safety Control Valve; failure of the other solenoids requires replacement of the individual valve assemblies.

The Pressure Sensors screw into the valve block and are sealed by a cone seat, the sensors are serviceable. The Pressure Sensor measures the hydraulic pressure and returns a signal to the Dynamic Response Control Module.

The valve block also contains a Pressure Relief Valve which protects the system in the event of a stuck PCV or PCV power supply short to battery Voltage.

Six ports are located on the underside of the valve block. Each port is fitted with a seal pack which contains two 'o' rings and backing rings. The pipes locate and seal in the seal packs and are secured to the valve block with a keeper plate, collets, studs and nuts. These seal packs are serviceable.