11 61 730 Check BMW diagnosis system for excess pressure and vacuum (N63).

WARNING: This page is about a different car, the 2011 BMW X6 and 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Excess pressure and vacuum lines are identified by the size of the connection fittings and color-coded red and blue and must not be mixed up with each other.

Build up pressure with Blue color.

Generate vacuum pressure with Red color.

Mixing up the functions will result in damage to the engine.

Necessary preliminary tasks:

Release upper section of intake air filter.
Prepare BMW diagnosis system.
Start diagnostic program.
1. Power train
2. Engine electronics
3. Air supply
4. Charging pressure control
  or Perception
  
  Lack of power

Note on ordering:

Workshop equipment.
Workshop planning.
Workshop equipment catalogue.
Measuring and test equipment.
No. 81 29 0 426 464

Pressure measurement:

Prepare BMW diagnosis system on excess pressure diagnosis unit.

Screw in pressure sensor.
Overpressure connection (Blue).
Connect stimuli cables (3) to positive and negative.
Connect 12V battery cables (4) to vehicle battery positive and negative.

Fig 1: Measuring Pressure Diagnosis Unit
Courtesy of BMW OF NORTH AMERICA, INC.

Secure seal plug (1) with union nut (2) in intake duct and seal.

NOTE: Twin-Turbo: both intake ports must be sealed.

Fig 2: Identifying Intake Duct Seal Plug And Union Nut

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Insert Blue pneumatic hose (4) in pneumatic coupling (2) of sealing plug (1).

Seal plug (3) has no pneumatic coupling.

Fig 3: Inserting Blue Pneumatic Hose In Sealing Plug Pneumatic Coupling

Courtesy of BMW OF NORTH AMERICA, INC.

Vacuum pressure measurement:

Prepare diagnosis tester on vacuum diagnosis unit.

Screw in pressure sensor.
Connect stimuli cables (2) to positive and negative.
Connect 12V battery cables (3) to vehicle battery positive and negative.
Controller for vacuum connection.
Vacuum connection (Red).

Fig 4: Measuring Vacuum Pressure Of Vacuum Diagnosis Unit
Courtesy of BMW OF NORTH AMERICA, INC.

Calibration for vacuum pressure measurement:

Seal stop cock (2) in direction of arrow.

Release lock nut on controller (1).

Carry out pressure adjustment in accordance with BMW diagnosis instruction.

Secure controller (1) hand-tight against turning.

Open shutoff tap (2) again.

Fig 5: Measuring Vacuum Pressure Calibration

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Connections on EPPC:

Connection (VAC) to vacuum reservoir.
Connection (OUT) with ring to exhaust turbocharger.

Fig 6: Identifying Plug Connection, Vacuum Hoses And Nuts
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Vacuum activation, cylinders 1-4.

Detach red vacuum line from vacuum unit.

Prepare T-piece (5) with vacuum lines for measurement.

Connect red vacuum line (1) with vacuum unit (2) and quick-release coupling (3).

Open shutoff tap (4).

NOTE: Observe diagnosis instructions.

Fig 7: Identifying Vacuum Unit, Line, Quick-Release Coupling, Shutoff Tap And T-Piece (Cylinder 1-4)

Courtesy of BMW OF NORTH AMERICA, INC.

Vacuum activation, cylinders 5-8.

Detach blue vacuum line from vacuum unit.

Prepare T-piece (5) with vacuum lines for measurement.

Connect blue vacuum line (1) with vacuum unit (2) and quick-release coupling (3).

Open shutoff tap (4).

NOTE: Observe diagnosis instructions.

Fig 8: Identifying Vacuum Unit, Line, Quick-Release Coupling, Shutoff Tap And T-Piece (Cylinder 5-8)

Courtesy of BMW OF NORTH AMERICA, INC.

Exhaust turbocharger, cylinders 1-4.

Initial position (1) of wastegate linkage depressurized.

Wastegate valve opened.

Fig 9: Identifying Wastegate Linkage Initial Position (Without Vacuum Pressure)

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Initial position (1) of wastegate linkage with vacuum pressure.

Wastegate valve closed.

Fig 10: Identifying Wastegate Linkage Initial Position (With Vacuum Pressure)

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Exhaust turbocharger, cylinders 5-8.

Initial position (1) of wastegate linkage depressurized.

Wastegate valve opened.

Fig 11: Identifying Wastegate Linkage Initial Position (Without Vacuum Pressure)

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Initial position (1) of wastegate linkage with vacuum pressure.

Wastegate valve closed.

Fig 12: Identifying Wastegate Linkage Initial Position (With Vacuum Pressure)

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Check wastegate valve with vacuum:

Wastegate valves must be opened without vacuum.

The wastegate valves must close if a vacuum pressure is applied at the wastegate sockets (see BMW diagnosis system).

Check shaft on turbine wheel for rotatability.

Fig 13: Identifying Oil Return Line V-Band Clamp And Mounting Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Follow diagnosis instructions.