BMW X5: Checking Repumping Function Of Suction - Jet Pump With BMW Diagnosis System

IMPORTANT: Ensure adequate ventilation in the place of work! Ensure absolute cleanliness when working on the open fuel tank.

Contaminants in the fuel tank can impair driving operation or may even result in vehicle breakdown! Catch escaping fuel in a suitable container.

Necessary preliminary tasks:

• Fill level must be < or = 28 l
  • If necessary, draw off fuel from fuel tank16 00 005 Draining and Filling Fuel Tank
• Pour two to three liters of fuel into the left tank chamber via the flange opening
• Connect diagnosis system
  • Path:
    • Brief test KOMBI Instrument cluster
    • Diagnosis control unit functions
    • Diagnosis requests
    • Tank sensor 1, tank sensor 2

NOTE:

Tank sensor 1 = right tank sensor
Tank sensor 2 = left tank sensor

Start engine.

Compare display for left and right tank chambers.

Repumping function OK

If fill level of tank sensor 2 (left chamber) is falling (approx. one liter per minute).

Repumping function not OK

If fill level of tank sensor 2 (left chamber) is stable or rising.

REMOVING AND INSTALLING OR REPLACING FUEL GAUGE SENSOR (PETROL/GASOLINE, RIGHT)

Recycling

Fuel escapes when fuel lines are detached. Have a suitable collecting container ready.

Catch and dispose of escaping fuel.

Observe country-specific waste-disposal regulations.

IMPORTANT: Ensure adequate ventilation in the place of work! Ensure absolute cleanliness when working on the open fuel tank.

Contaminants in the fuel tank can impair driving operation or may even result in vehicle breakdown!

Before starting the engine for the first time:

• Fill fuel tank with at least 5 liters of fuel

Check transfer function of suction jet pump.

Necessary preliminary tasks:

• Draw off fuel from fuel tank.
• Remove rear seat bench.

For vehicles with 2 seat rows only:

Disconnect plug connection (1).

Remove cover (2).

Fig. 6: Identifying Plug Connection And Cover

Release nuts (1) and remove cover for service opening (2) from right side of fuel tank.

Fig. 7: Identifying Nuts And Cover For Service Opening

Disconnect plug connection (1).

Unlock quick-release fastener (2) and detach vent line.

If necessary, unlock quick-release fastener (3) for fuel feed line of independent heating and detach.

If necessary, disconnect plug connection (4) for independent heating fuel pump.

Fig. 8: Identifying Plug Connection And Quick-Release Fastener

Release completely remainder of torque break off head (1) with a screwdriver.

Remove hose clamp from clamping ring (2).

NOTE: A flexible extension can be used to release the hose clamp.

Press clamping ring (2) part at open end in direction of arrow and remove.

Fig. 9: Identifying Break off Head And Clamping Ring

Installation:

Make sure that service cover is installed in correct position.

Indentation (2) on clamping ring must line up with raised section (1) of tank.

Pin on service cover (3) must line up with indentation on clamping ring.

Fig. 10: Identifying Indentation, Service Cover And Break off Head

Installation:

Seal (1) must always be replaced.

Fig. 11: Identifying Seal

Disconnect grounding cable (1) towards top.

IMPORTANT: Grounding cable (1) must be replaced if it has been detached once!

Fig. 12: Identifying Grounding Cable

Carefully raise service cover.

Unclip plastic tube (1).

Unlock and disconnect quick-connect coupling (2).

Remove fuel pump.

IMPORTANT: Catch escaping fuel in suitable container.

No fuel is permitted to get into the interior!

Fig. 13: Identifying Plastic Tube And Quick-Connect Coupling

With fuel pump removed, disconnect plug connection (1) in tank and replace grounding cable (2).

Fig. 14: Identifying Plug Connection And Grounding Cable

Unclip fuel level sensor (1) in direction of arrow from housing and then slide out of guides (2) in direction of arrow.

Installation:

Fuel level sensor (1) must be felt and heard to snap into place.

Fig. 15: Identifying Fuel Level Sensor And Guides

Disconnect plug connection (1) and disengage cable (2) from guides.

Fig. 16: Identifying Plug Connection And Disengage Cable

REMOVING AND INSTALLING OR REPLACING FUEL GAUGE SENSOR (PETROL/GASOLINE, LEFT)

Recycling

Fuel escapes when fuel lines are detached. Have a suitable collecting container ready.

Catch and dispose of escaping fuel.

Observe country-specific waste-disposal regulations.

IMPORTANT: Ensure adequate ventilation in the place of work! Ensure absolute cleanliness when working on the open fuel tank.

Contaminants in the fuel tank can impair driving operation or may even result in vehicle breakdown!

Before starting the engine for the first time:

• Fill fuel tank with at least 5 liters of fuel

Necessary preliminary tasks:

• Draw off fuel from fuel tank.
• Remove rear seat bench.
• Remove right sensor unit.

For vehicles with 2 seat rows only:

Disconnect plug connection (1).

Remove cover (2).

Fig. 17: Identifying Plug Connection And Cover

Release nuts (1) and remove cover for service opening (2) from left side of fuel tank.

Fig. 18: Identifying Nuts And Cover For Service Opening

Disconnect plug connection (1).

Unlock quick-release fastener (2) and detach fuel feed line.

Unlock quick-release fastener (3) for vent line and detach.

Fig. 19: Identifying Plug Connection And Quick-Release Fastener

Release completely remainder of torque break off head (1) with a screwdriver.

Remove hose clamp from clamping ring (2).

NOTE: A flexible extension can be used to release the hose clamp.

Press clamping ring (2) part at open end in direction of arrow and remove.

Fig. 20: Identifying Break off Head And Clamping Ring

Installation:

Make sure that service cover is installed in correct position.

Indentation (2) on clamping ring must line up with raised section (1) of tank.

Pin on service cover (3) must line up with indentation on clamping ring.

Hose clip with torque break off head (4) must always be replaced.

Tighten hose clip until torque break off head (4) breaks off.

Fig. 21: Identifying Indentation, Service Cover And Break off Head

Installation:

Seal (1) must always be replaced.

Fig. 22: Identifying Seal

Attach an auxiliary lead (1) to hose pack (2) through service opening.

The auxiliary lead is pulled through with the hose pack towards the left and facilitates subsequent reinstallation.

Installation:

Make sure when pulling through the hose pack that the tank ventilation system in the tank tunnel is not damaged.

Fig. 23: Identifying Lead And Hose Pack

Remove sensor unit (1) from fuel tank.

Feed sensor unit (1) with hose pack (2) out of fuel tank.

Installation:

When replacing the sensor unit, modify the end of the auxiliary lead to the new hose pack and carefully pull in through the tank.

NOTE: Illustration shows the tank removed.

Fig. 24: Identifying Sensor Unit And Hose Pack

Unclip fuel level sensor (1) in direction of arrow from housing and then slide out of guides in direction of arrow.

Installation:

Fuel level sensor (1) must be felt and heard to snap into place.

Fig. 25: Identifying Fuel Level Sensor

Disconnect plug connection (1) and disengage cable (2) from guides.

Fig. 26: Identifying Plug Connection And Disengage Cable

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