Valve Block

Valve Block

The valve block contains five solenoid valves which control the air supply as follows:

RH Front

If air is required in the RH front air spring, the air suspension ECU (C0867) provides a feed to the valve block (C0770) on a UB wire. An earth path is provided by the ECU on a UY wire.

LH Front

If air is required in the LH front air spring, the air suspension ECU (C0867) provides a feed to the valve block (C0770) on a UB wire. An earth path is provided by the ECU on a US wire.

RH Rear

If air is required in the RH rear air spring, the air suspension ECU (C0867) provides a feed to the valve block (C0274) on a WP wire. An earth path is provided by the ECU on a WR wire.

LH Rear

If air is required in the LH rear air spring, the air suspension ECU (C0867) provides a feed to the valve block (C0274) on a WP wire. An earth path is provided by the ECU on a YP wire.

Reservoir Valve

The reservoir valve controls the air pressure supply from the reservoir to the air springs. The air suspension ECU (C0867) provides a feed to the valve block (C0771) on a UW wire, and an earth path on a UG wire.

Air Pressure Sensor

The air pressure sensor measures the pressure within the air reservoir. The air suspension ECU (C0867) provides a feed to the pressure sensor (C1611) on a Y wire. An earth path is provided for the sensor on a W wire. By measuring the voltage returned on a U wire, the air suspension ECU can determine the pressure within the air reservoir.