Fuel Pump: Service Precautions

Safety Precautions

CAUTION!
The fuel pressure in the high side can be up to 120 bar! Follow the safety precautions when releasing the pressure in the high side. Refer to => [ High Side Pressure, Releasing ] High Side Pressure, Releasing.

For reasons of safety, if the battery has not been disconnected, the fuel pump fuse must be removed before opening the fuel supply system as the fuel pump will be activated by the drivers door contact switch. Fuse assignment.

When doing any repair work, especially in the engine compartment, pay attention to the following due to clearance issues:

• Route lines of all types (for example, fuel, hydraulic, Evaporative Emission (EVAP), coolant, refrigerant, brake fluid and vacuum) and electrical wiring so that the original path is followed.

• To prevent damage to the lines, make sure there is sufficient clearance to all moving or hot components.

Always observe the following when removing and installing the fuel level sensor or the fuel pump from a full or partially filled fuel tank.

• Before starting work, switch the exhaust extraction system on and place an extraction hose close to the fuel tank opening to extract the fuel fumes. If no exhaust extraction system is available, a radial fan (as long as motor is not in the air flow) with a displacement greater than 15 m3/h can be used.

• Prevent fuel from contacting skin! Wear fuel resistant gloves!

• If the engine is to be cranked at starting RPM without starting:

- Disconnect the connectors from the ignition coils using the assembly tool (T10118).

- Place the assembly tool (T10118) on the locking button - arrow - and carefully pull the connector up.