BMW 7 Series: Electronic Components

OVERVIEW OF ELECTRONIC COMPONENTS

Fig. 153: Overview Of Electronic Components

1. Pulse generator
2. Brake pad wear sensor
3. ICM control unit
4. DSC control unit

REMOVING AND INSTALLING/RENEWING ICM CONTROL UNIT

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

Necessary preliminary tasks

• Disconnect BATTERY NEGATIVE LEAD
• Remove SIDE TRIM PANEL on center console on left and right
• Remove CENTRE ARMREST STORAGE COMPARTMENT
• Remove REAR CENTRE CONSOLE TRIM

Fig. 154

IMPORTANT: Risk of damage in area (1) of center console on left and right!

Fig. 155: Identifying Damage Area

Release left and right screws (1).

Installation: Tightening torque 51 16 7AZ.

Fig. 156: Identifying Screws

Release screws (1) on center console carrier.

Installation: Tightening torque 51 16 4AZ.

IMPORTANT: Risk of damage to center console (2)! Observe the following instruction exactly.

Fig. 157: Identifying Screws And Centre Console

Raise center console (1) at rear (A) 7 cm.

Fig. 158: Raising Centre Console

NOTE: Picture shows center console removed.

Unfasten screws (2).

Installation: Replace screws.

Tightening torque 34 51 2AZ.

Fig. 159: Identifying Plug Connection, Screws And ICM Control Unit

Swing out ICM control unit (3).

Disconnect plug connection (1).

IMPORTANT: Do not trap any electrical leads when installing ICM control unit!

After removing and installing ICM control unit

After completing tasks, use BMW Diagnosis and Information System to

• Carry out ADJUSTMENT/STARTUP OF ICM CONTROL UNIT

Replacement

After completing tasks, use BMW Diagnosis and Information System to

• Carry out programming/encoding
• Carry out RIDE-HEIGHT CALIBRATION
• Carry out ADJUSTMENT/STARTUP OF ICM CONTROL UNIT
• Active front steering only: carry out ADJUSTMENT/INITIAL OPERATION of active front steering

REMOVING AND INSTALLING/REPLACING DSC CONTROL UNIT

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

Necessary preliminary work

• Remove the HYDRAULIC UNIT

IMPORTANT: Maintain conditions of absolute cleanliness.

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

Fig. 160: Identifying Brake Lines And Bracket

Unfasten brake lines (1).

Installation note: Tightening torque 34 32 1AZ.

Fig. 161: Identifying Brake Lines

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. 162: Identifying Screws And DSC Control Unit

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. 163: Identifying Pressure Sensor Contacts And Sealing Surfaces

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. 164: Identifying Valve Coils, Pressure Sensor Contact Springs, Gasket And DSC Control Unit

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. 165: Screw Tightening Sequence

Replacement

• Carry out programming/encoding
• Brake line mix-up test:
• Function check of hydraulic unit

F04 only

• Carry out brake pedal travel sensor adjustment.

REPLACING A BRAKE PAD SENSOR (FRONT)

IMPORTANT: The brake pad wear sensor must be replaced once it has been removed (brake pad wear sensor loses its retention capability in the brake pad).

If an already ground brake pad wear sensor has to be replaced although the minimum brake pad thickness has not yet been reached, it is necessary to file down the new sliding contact with a file to the same length as the ground sliding contact.

Necessary preliminary tasks

• Remove front left WHEEL

Open housing cover.

Disconnect plug connection (1).

Fig. 166: Identifying Plug Connection

Unclip line (1) along line.

Fig. 167: Identifying Unclip Line

Disengage line from brake pad wear sensor from holder (1).

Pull brake pad wear sensor (2) in direction of arrow out of brake pad.

Installation: Make sure brake pad wear sensor (2) is correctly seated in brake pad and holder (1).

Fig. 168: Identifying Brake Pad Wear Sensor And Holder

REPLACING A BRAKE PAD SENSOR (REAR)

IMPORTANT: The brake pad wear sensor must be replaced once it has been removed (brake pad wear sensor loses its retention capability in the brake pad).

If an already ground brake pad wear sensor has to be replaced although the minimum brake pad thickness has not yet been reached, it is necessary to file down the new sliding contact with a file to the same length as the ground sliding contact.

Necessary preliminary tasks

• Remove rear right WHEEL

Open housing cover.

Disconnect plug connection (1).

Fig. 169: Identifying Plug Connection

Unclip line (1) along line.

Fig. 170: Identifying Unclip Line

Disengage line from brake pad wear sensor from holder (1).

Pull brake pad wear sensor (2) in direction of arrow out of brake pad.

Installation: Make sure brake pad wear sensor (2) is correctly seated in brake pad and holder (1).

Fig. 171: Identifying Brake Pad Wear Sensor And Holder

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