Removing Front-Axle Valve Block

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2018 Porsche Cayenne, 2017 Porsche Cayenne, 2016 Porsche Cayenne, 2015 Porsche Cayenne, and 2014 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Incorrect line routing

Risk of damage to lines and hoses
Malfunction and fault memory entry on control unit

→ Avoid small bending radii when routing lines.

→ File down edges and burrs in the routing area or mask them with adhesive tape.

→ Maintain a sufficient distance from components exposed to high temperatures while driving.

NOTE: Voltage peaks

Risk of damage to electrical load or to the control unit

Information

Before starting to work on the PDCC system, always clean the underbody or at least clean the system components you will be working on. Ensure absolute cleanliness at all times. In other words:

Clean the system components to be removed using a power washer, for example. Ensure that the high-pressure spray is at least 50 cm away from the component (risk of damage to electric lines, connectors and contacts) .
Before loosening the hydraulic connections, the areas around the connections must also be cleaned carefully (e.g. using a brush and/or a lint-free cloth) .
If you intend to use the component again, the openings must be closed off immediately using suitable stoppers .
If you are using new components, the stoppers must only be removed immediately before fitting .

Information

If a component is replaced, the reservoir must always be replaced as well. → 430955 REPLACING RESERVOIR (PDCC)

Fig 1: Identifying Front-Axle Valve Block

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Unclip combination connector -arrow- .

Fig 2: Locating Combination Connector
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Disconnect hydraulic connections (use a suitable collecting container). Close off lines using suitable clean stoppers -arrows- .

Fig 3: Disconnecting PDCC Lines
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Unscrew fastening screws on the valve block -arrows- and remove valve block.

Fig 4: Locating Valve Block Mounting
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
When replacing the valve block wiring harness: Number the valves and pressure sensors (using a felt-tip pen, for example). Push the insulator back slightly and assign the cable colors to the corresponding valves/pressure sensors.
Remove wiring harness. Disconnect connectors on the valves/pressure sensors. Fit wiring harness on the new valve block.