Item | Description |
1 | Fuel pump and level indicator module, left-hand side Comments: Inactive side without separate fuel pump |
2 | Fuel pump and level indicator module, right-hand side |
Changing the right-hand fuel pump and level indicator module
If the right-hand fuel pump and level indicator module needs to be changed on a vehicle with a booster heater/additional heater, the bore for the connection to the fuel-fired booster heater/additional heater must be drilled.
The right-hand fuel pump and level indicator module contains a demand-switched electric fuel pump which drives two suction jet pumps. One of them ensures that fuel is pumped from the left-hand half of the tank into the right-hand half. On-demand switching is performed by the fuel pump module.
To remove the right-hand fuel pump and level indicator module it is necessary to detach the left-hand fuel pump and level indicator module and pull it out slightly so that the connecting hose can be detached and the connector for the left-hand fuel pump and level indicator module can be disconnected. The left-hand fuel pump and level indicator module can be removed without detaching the right-hand fuel pump and level indicator module.
The instrument cluster uses the signals from both fuel fill level sensors to determine the fuel fill level.
The resistor tracks of the fuel fill level sensors cannot be replaced individually.
The fuel filter is designed to last for the service life of the vehicle and does not need to be replaced.
The right-hand fuel pump and level indicator module contains an overpressure limiting valve.
This overpressure limiting valve ensures that the fuel pressure between the injectors and the right-hand fuel pump and level indicator module does not exceed 3.3 bar after the engine is stopped. This reduces the formation of vapor bubbles and also prevents dripping from the injectors.