34 52 516 Removing and installing/replacing DSC control unit

IMPORTANT: Read and comply with notes on PROTECTION AGAINST DAMAGE FROM ELECTROSTATIC DISCHARGE (ESD protection).

Necessary preliminary work:

IMPORTANT: Maintain conditions of absolute cleanliness.

Unclip brake lines (1) from holder (2).

Fig 1: Identifying DSC Control Unit Brake Lines And Holder

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Unfasten brake lines (1).

Installation note:

Tightening torque 34 32 1AZ .

Fig 2: Identifying DSC Control Unit Brake Lines

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IMPORTANT: Risk of damage to the contacts when removing and installing the hydraulic unit.

Release screws (1) and carefully detach DSC control unit (2) towards top.

Fig 3: Identifying DSC Control Unit And Screws

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IMPORTANT: Cleaning with compressed air, chemical solvents and sharp-edged objects is not permitted.

Do not touch pressure sensor contacts (2) with your fingers or clean the contacts.

If necessary, clean sealing surface (1) with a plastic scraper or a fluff-free cloth.

Fig 4: Identifying Pressure Sensor Contacts And Sealing Surfaces

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IMPORTANT: Do not touch valve coils (1) and pressure sensor contact springs (2) with your fingers, do not clean or readjust these components either.

Check gasket (3) for damage. If damaged, replace DSC control unit (4).

Fig 5: Identifying DSC Control Unit, Gasket, Pressure Sensor Contact Springs And Valve Coils

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Installation note:

Make sure screws are inserted evenly and DSC control unit rests on hydraulic unit.

Replace screws.

Observe tightening sequence (1-4).

Tightening torque 34 51 1AZ .

Fig 6: Identifying DSC Control Unit Screw Tightening Sequence

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Replacement: