Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Crash fuel shut-off
Function
Vehicles with an airbag are equipped with a crash fuel shut-off system. It reduces the danger of a fire in a crash as the fuel pump is switched off via the fuel pump relay. At the same time, with this set-up, an improvement in the comfort of engine startability is also attained. When opening the door, the fuel pump is activated for 2 seconds to build pressure in the fuel system.
When opening the fuel system:
Observe safety precautions, refer to Safety precautions when working on fuel supply system .
- Check fuel pump relay: Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.