Draining fuel (emptying the fuel tank)
| WARNING | Danger of poisoning from fuels! |
> Gasoline is toxic.
> Inhaling vapours can cause irritation of the mucous membranes and eyes.
> It can be carcinogenic. It represents a serious risk to health when inhaled, touched or swallowed over longer periods.
> Only work on the fuel system in well-ventilated rooms.
> Wear protective gloves that are fuel-resistant.
> Wear a breathing mask with active charcoal filter; do not breathe in any fuel vapours.
> Ensure that there is adequate ventilation and extract all fuel vapours.
> Before opening the fuel lines or fuel hoses, relieve the fuel pressure.
> Collect escaping fuel, absorb it if necessary with a suitable binding material and dispose of properly.
> Pay attention to cleanliness when working on the fuel system.
| WARNING | Danger of fire from fuel! |
> Keep clear of ignition sources.
> Do not smoke.
> Disconnect battery.
> Danger of fire due to naked flames and sparks, e. g. during welding or grinding work.
> Danger of fire due to escaping fuel, e. g. on hot engine components or due to electrostatic charge. Allow engine to cool down.
> Secure the vehicle, e. g. with a warning sign.
> Change any clothing soaked with fuel immediately.
> In case of fire, use CO 2 or dry powder fire extinguishers.
| CAUTION | Damage to the fuel tank! |
> Please observe the general warning notes and working regulations. --> 10 01 AW THE MOST IMPORTANT WORKING REGULATIONS AND WARNING NOTES - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) .
> The tank can only be drained using the vehicle's own fuel pumps.
> It is not possible to extract fuel via the fuel filler opening and doing so may cause damage.
Note. All windows should be opened for better ventilation in the passenger compartment.
1. Fold rear seat forwards.
Scheme 6
2. Fold up the retaining brackets of the right-hand belt anchor. To do so, undo the three fastening screws and fold up the bracket with the belt anchors. Do not use the fastening screws again.
Scheme 7
3. Undo the right cap. To do so, cut out the carpeted floor along the perforated lines using a carpet knife and fold it over. Then unscrew the four fastening nuts and remove the lids. View shows both lids.
4. Reduce the fuel pressure in the fuel line. To do so, screw down the protective cap on the fuel gallery and carefully press the valve. Collect emerging fuel with a cloth.
Scheme 8
5. Carefully pull off the fuel line -1-. Collect emerging fuel with a cloth. (Scheme 7)
6. Connect earth cable to the vehicle.
Scheme 9
7. Attach Porsche adapter to the connection piece. Twist top and bottom part of adapter in opposite directions until it is tight.
8. Screw the connecting piece into the suction hose and tighten it hand tight.
Scheme 10
9. Connect the connecting piece to the adapter.
10. Open lid of central electrics box. To do this, loosen the four fastening screws.
| CAUTION | Risk of damage to fuel pumps! The Porsche adapter can slip from the tank connection. |
> Only switch fuel pumps on after the extraction pump has been switched on.
> Always set extraction pump to suction mode - never refill mode - when the vehicle pump is running.
Note. Use special tool Alternatively, adapters 26 and 25 can be connected and the fuel relay can be bridged. A fault is stored in the engine control module during this procedure. adapter P 9479 from the measurement tool box to activate the fuel pump.
11. Remove fuel pump relays -1- and -2-. The pump can be activated by bridging the relevant contacts. The contact assignment is printed on the corresponding relay. No faults are stored in the engine control module when special tool adapter P 9479 is used. Both pumps should be activated. As soon as the tank is empty, fit the fuel pump relays again and close the electrics box. see scheme 29
Scheme 11
12. Carry out any necessary repair work on the tank. Please observe the warning notes in --> 10 01 AW THE MOST IMPORTANT WORKING REGULATIONS AND WARNING NOTES - AS OF MY 2003 (ALL MODELS EXCEPT CAYENNE S TIO TITAN) .
13. Fit all connections (fuel lines, ventilation tubes and electric plugs).
14. Fit the lid. Then tighten the four fastening nuts --> Tightening torque: 10 (7.5 ftlb.) Nm . Refit carpeted floor and fix with double-sided adhesive tape.
15. Tighten the seat-belt buckle fastening plates. Use three new fastening screws for this and tighten. For tightening torque Refer to 69 25 19 Removing and installing rear belt lock - as of MY 2003 (All Models) .
16. Fold rear seat down again.