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

Necessary preliminary tasks: 

• Release upper section of intake air filter.
• Prepare BMW diagnosis system.
• Start diagnosis program.
  1. Electric motor
  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 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: Preparing BMW Diagnosis System On Diagnosis Unit

   Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Identifying 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 Pneumatic Coupling Of Seal Plug

Courtesy 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: Preparing Diagnosis Tester On 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 stop cock (2) again.

Fig 5: Calibrating Diagnosis Unit For Vacuum Pressure Measurement

Courtesy 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 EPPC Connections

   Courtesy 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).

Fig 7: Identifying T-Piece, Vacuum Line, Vacuum Unit, Quick-Release Coupling, And Shutoff Tap

Courtesy 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).

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

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 Initial Position Of Wastegate Linkage (Depressurized)

Courtesy of BMW OF NORTH AMERICA, INC.

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

Wastegate valve closed.

Fig 10: Identifying Initial Position Of Wastegate Linkage (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 Initial Position Of Wastegate Linkage (Depressurized)

Courtesy of BMW OF NORTH AMERICA, INC.

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

Wastegate valve closed.

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

Courtesy 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 rotatability.

Fig 13: Identifying Wastegate Valves

Courtesy of BMW OF NORTH AMERICA, INC.

Follow diagnosis instructions.