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

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. 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: 

Note on ordering:

Pressure measurement: 

Prepare BMW diagnosis system on diagnosis unit.

  1. Screw in pressure sensor.
  2. Overpressure connection (Blue).
  3. Connect stimuli cables (3) to positive and negative.
  4. Connect 12V battery cables (4) to vehicle battery positive and negative.
    Fig 1: Connecting 12V Battery Cables To Vehicle Battery Positive And Negative
    G09954102Courtesy of BMW OF NORTH AMERICA, INC.

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

NOTE: Twin-Turbo: both intake ducts must be sealed.
Fig 2: Identifying Seal Plug And Union Nut
G09954103Courtesy of BMW OF NORTH AMERICA, INC.

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 Pneumatic Coupling
G09954104Courtesy of BMW OF NORTH AMERICA, INC.

Vacuum pressure measurement: 

Prepare diagnosis tester on diagnosis unit.

  1. Screw in pressure sensor.
  2. Connect stimuli cables (2) to positive and negative.
  3. Connect 12V battery cables (3) to vehicle battery positive and negative.
  4. Controller for vacuum connection.
  5. Vacuum connection (Red).
    Fig 4: Checking Vacuum Pressure
    G09954105Courtesy 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 stop cock (2) again.

Fig 5: Releasing Lock Nut On Controller
G09954106Courtesy of BMW OF NORTH AMERICA, INC.

Connections on EPPC: 

  1. Connection (VAC) to vacuum reservoir.
  2. Connection (OUT) with ring to exhaust turbocharger.
    Fig 6: Identifying Vacuum Reservoir Connection
    G09954107Courtesy of BMW OF NORTH AMERICA, INC.

Vacuum activation, cylinders 1-4. 

Detach red vacuum hose 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 Line, Shutoff Tap And Coupling
G09954108Courtesy of BMW OF NORTH AMERICA, INC.

Vacuum activation, cylinders 5-8. 

Detach blue vacuum hose 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 Line And Quick-Release Coupling
G09954109Courtesy 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 Position
G09954110Courtesy of BMW OF NORTH AMERICA, INC.

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

Wastegate valve closed.

Fig 10: Sliding Wastegate Valve
G09954111Courtesy of BMW OF NORTH AMERICA, INC.

Exhaust turbocharger, cylinders 5-8. 

Initial position (1) of wastegate linkage depressurized.

Wastegate valve opened.

Fig 11: Identifying Wastegate Linkage Position
G09954112Courtesy of BMW OF NORTH AMERICA, INC.

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

Wastegate valve closed.

Fig 12: Sliding Wastegate Valve
G09954113Courtesy of BMW OF NORTH AMERICA, INC.

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 rotability.

Fig 13: Identifying Wastegate Valves And Sockets
G09954114Courtesy of BMW OF NORTH AMERICA, INC.

Follow diagnosis instructions.

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