Preliminary Work

WARNING: This page is about a different car, the 2010 Porsche Cayenne, 2009 Porsche Cayenne, and 2008 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Toxic substances

Danger of poisoning or suffocation
Danger of burns to the eyes and skin

→ Ventilate the work area well.

→ Never ingest or inhale.

→ Read specific information on the Hazard Sheet.

→ Wear personal protective gear.

→ Do not smoke, eat or drink in the work area.

WARNING: Highly inflammable or explosive materials

Danger of fire or explosion

→ Avoid contact with hot parts or sources of ignition.

→ Use suction to remove ignitable vapours.

→ Attach warning sign in a clearly visible position.

Information

If the delivery pumps in the fuel tank are dirty or blocked, then symptoms of a poor fuel delivery rate will frequently occur at very low fuel levels. Therefore, if you suspect that the delivery pumps are dirty or blocked, check the hoses immediately. A piping diagram and assembly overview are shown in the information section for the fuel pumps. → 206619 REMOVING AND INSTALLING FUEL PUMP (IN-TANK FUEL PUMP) ON DFI ENGINES

Information

The fuel system must be depressurised before starting work on it.
Only work on the fuel system in well-ventilated rooms.
Any seals that are removed must always be renewed.
Do not use any sealant containing silicone or silicone spray when the injection system is open. Traces of silicone drawn in by the engine are not combusted and damage the oxygen sensors.

Connect a charger to the vehicle battery. → WM 2X00IN BATTERY TRICKLE CHARGING (EXCEPT CAYENNE TURBO S, CAYENNE DIESEL, CAYENNE S TRANSSYBERIA TIP, CAYENNE TRANSSYBERIA MAN, CAYENNE GTS TIP "PORSCHE DESIGN EDITION 3")
Carry out a fuel low-pressure check. → 200201 CHECKING FUEL PRESSURE (LOW PRESSURE) ON DFI ENGINES
Relieve the fuel pressure.
1. 3.1. Switch off ignition.
2. 3.2. Pull out fuse 13 and 14.
3. 3.3. Start the engine and wait until the engine starts up automatically.
Enable access to the fuel pump.
1. 4.1. Release rear seat, fold up and use a wire to prevent it falling down again. → Removing Rear Seat
2. 4.2. Loosen reinforcement plate for right seat-belt buckle. → WM 691219 REMOVING AND INSTALLING REAR THREE-POINT BELT
3. 4.3. Uninstall the right lid.
  
  Fig 1: Locating Fastening Nuts On Caps
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. 4.3.1. Remove the carpeted floor.
5. 4.3.2. Loosen the four fastening nuts -arrows- .
6. 4.3.3. Remove the right lid.
Enable access to the central electrics box.
1. 5.1. Open the cover over the central electrics box.
2. 5.2. Open the central electrics box cover.
  
  Fig 2: Locating Central Electrics Box Cover And Mounting Bolts
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. 5.2.1. Unscrew four fastening screws -arrows- .
4. 5.2.2. Remove cover.