Inertia Fuel Shutoff Switch: Description and Operation

Crash fuel shut-off

Function
Airbag-equipped vehicles have a crash fuel shutoff. This is intended to reduce the risk of vehicle fire following a crash by switching off the Fuel Pump (FP) via the Fuel Pump (FP) relay. At the same time, this function improves comfort of engine start-up behavior. When the door is opened, the Fuel Pump (FP) is activated for 2 seconds so that pressure builds in the fuel system.

When opening fuel system:
Observe safety precautions. Safety Precautions When Working on Fuel Supply System
- Check activation of Fuel Pump (FP) Relay -J17- according to wiring diagram.