BMW X5: Removing And Installing/Replacing Control Unit For Active Front Steering

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection)

Necessary preliminary tasks:

• Disconnect battery negative lead.
• Remove front left wheel arch cover (rear section).

Release nut (1) and disconnect ground cable.

Disconnect plug connections (2).

Unclip cable holder (3).

Installation:

Replace damaged cable holder.

Fig. 229: Identifying Plug Connections And Cable Holder

Release nuts (1, 2).

Tightening torque.

Remove active front steering control unit (3).

Fig. 230: Identifying Active Front Steering Control Unit

After installation:

• Replacement only: Carry out coding.
• Only when replacing / programming / coding: Carry out adjustment for active front steering.

OVERVIEW OF CONTROL UNITS

Fig. 231: Overview Of Control Units

1. Distribution box (on battery)
2. Distribution box (luggage compartment)
3. Airbag control unit
4. Roof switch centre
5. Rain/light sensor
6. Footwell module
7. Car Access System control unit
8. Junction box electronics
9. Fuse box, vehicle interior
10. Dynamic Drive control unit
11. Control unit/module for seat adjustment
12. Controller
13. Control unit for comfort access system
14. Rear lid module
15. Trailer module
    Control unit for air supply unit
16. Control unit, Vertical Dynamics Management
17. Control unit, Park Distance Control

NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE)

Special tools required:

• 12 7 060

NOTE: Electrical components which are particularly sensitive to electrostatic discharge (electronic control units, sensors, etc.) are marked with the ESD warning symbol.

E -Electro

S -Static

D -Discharge

IMPORTANT: Read and comply without fail with the notes on this subject from Service Information 2 06 04 128.

Statically charged persons can discharge by touching electrical components.

NOTE: Humans can only detect a discharge starting from a level of approx. 3000 V.

The danger threshold for electrical components already starts from a level of approx. 100 V.

Fig. 232: Touching Electrical Components For Discharge

Example:

Mechatronic control unit.

Fig. 233: Identifying Mechatronic Control Unit

Fig. 234: Precaution For Touching Pins Or Multi-Pin Connectors Directly

IMPORTANT: Do not touch pins or multi-pin connectors directly! Touch electrical components by their housings only.

IMPORTANT: To prevent electrical components from being damaged or destroyed by electrostatic discharge, it is absolutely essential to comply with the following instructions:

• When replacing electrical components, leave the replacement components in their original packaging until immediately before they are to be installed
• If necessary, always return a removed component in its original packaging (always pack the component away immediately)
• Read and comply with user information on using the associated special tool 12 7 060

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