Inertia Fuel Shutoff Switch: Description and Operation

Crash fuel shut-off
Function
Models with an airbag are equipped with a crash fuel shut-off system. This system reduces the danger of a fire in a crash in that the fuel pump is switched off via the fuel pump relay. At the same time this system improves starting of the engine. When the door is opened the fuel pump is activated for 2 seconds to build up pressure in the fuel system.
When opening the fuel system:
^ Observe safety precautions.
^ Check activation of fuel pump relay using wiring diagram and VAG1466A:
Refer to wiring diagrams