16 00 510 Conducting leak test on fuel tank and tank venting system
WARNING: This page does not describe the selected car, but rather 24 other vehicles, including the 2015 BMW Alpina B7L xDrive, 2015 BMW Alpina B7 xDrive, 2015 BMW 750i xDrive, 2015 BMW 750i, and 2015 BMW 750Li xDrive. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
On vehicles with tank leak diagnosis modules (DMTL), do not work with external pressurisation as the tank ventilation system will leak under this condition.
On account of emerging fuel vapours, carry out all work in well ventilated rooms. Or use a suitable extractor system.
Observe country-specific accident prevention and occupational safety regulations.
On account of emerging fuel vapours, carry out all work in well ventilated rooms. Or use a suitable extractor system.
Observe country-specific accident prevention and occupational safety regulations.
NOTE:
The following procedure is only applicable to vehicles with
the tank leak diagnosis module (DMTL).
For vehicles without tank leak diagnosis module:
Pressurise FUEL TANK AND TANK VENTING SYSTEM .
During the leak test with a leak detector, be sure to follow the operating instructions of the equipment manufacturer.
For vehicles without tank leak diagnosis module:
Pressurise FUEL TANK AND TANK VENTING SYSTEM .
During the leak test with a leak detector, be sure to follow the operating instructions of the equipment manufacturer.
NOTE:
Select "Tank leak diagnosis module (DMTL)" on Diagnosis and Information System (DIS).
- The leak diagnosis pump pressurises the fuel tank and tank ventilation system for 30 sec.
- If pressure is needed for longer than 30 sec., press "Activate" button again after 30 sec.
The leak test can be carried out with a leak detector.
Possible causes may be:
- Tank cap leaking (check TANK CAP PRESSURE RELIEF VALVE )
- Tank ventilation lines leaky (fuel tank-activated carbon canister-tank ventilation valve)
- Tank ventilation valve leaky (engine compartment)
- Fuel level sensor flange on tank leaking