BMW X5: Performing Vertical Acceleration Sensor Adjustment (Vertical Dynamics Management)

NOTE: Vertical acceleration sensor adjustment must be performed after replacement of the spring strut/shock absorber with damper satellites.

Connect vehicle to BMW diagnosis system.

Select and perform vertical acceleration sensor adjustment under Service functions.

NOTES ON AIR SPRING SYSTEM

Components / Pipes

IMPORTANT: Maintain the highest possible standards of cleanliness around the pipe connections when dismantling and assembling components/pipes. Even the tiniest dirt particles on the pipe connections or damage to the pipes can result in leaks in the air spring system! Do not kink, twist or crush lines.

Pipe connections must be sealed off with adhesive tape immediately after they have been removed. The adhesive tape may only be removed shortly before the connection is reinstalled.

Air spring strut / air spring:

NOTE: If a vehicle has been driven with a depressurized air spring strut/air spring, the air spring strut/air spring must always be replaced.

Check air spring strut/air spring for damage.

CHECKING AIR SPRINGS FOR DAMAGE

NOTE: If a vehicle has been driven with depressurized air springs, the air springs must always be replaced.

Lift vehicle.

Air spring is OK:

1. when the gaiter cannot be pressed in by hand
2. when no visible damage (e.g. kinks, cracks, porous areas, etc.) is discernible
3. when the rolling fold is uniform

Fig. 6: Identifying Air Spring

NOTE: If one of the above-mentioned points fails the test, then the air spring must be replaced.

DRAINING/FILLING AIR SPRING SYSTEM

WARNING: Danger of injury! Drain the air spring system before carrying out any work on the air supply unit, air pipes and air springs! Danger of injury if this instruction is not complied with!

IMPORTANT: Risk of damage!

To fill the air springs, raise the vehicle until the wheels are freely suspended.

NOTE: Read and comply with notes on air spring system.

Deactivating air spring system:

• Fold down passenger compartment fuse box.
• Pull out fuse (F32) for air supply unit.

Fig. 7: Identifying Fuse (F32)

Draining air spring system:

• Connect BMW diagnosis system
• Switch ignition on
• Drain air springs with aid of BMW diagnosis system (Service functions: menu item "Venting procedure")
• Raise vehicle until wheels are freely suspended
• Remove ignition key

Fig. 8: Identifying BMW Diagnosis System (DIS)

Activating and filling air spring system:

• Raise vehicle until wheels are freely suspended
• Check air spring lower section (1) for correct engagement in wheel carrier, correct if necessary

Fig. 9: Identifying Air Spring Lower Section

IMPORTANT: Risk of damage! First raise the vehicle (until the wheels are freely suspended) and then activate the air spring system by inserting the fuse. Failure to comply may result in damage to the air springs!

Fig. 10: Identifying Fuse (F32)

• Insert fuse (F32) in corresponding slot in fuse box
• Connect BMW diagnosis system
• Switch ignition on
• Fill air springs using BMW diagnosis system (control unit functions)
• Lower vehicle
• Clear fault memory

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