84 11 627 Removing And Installing/Replacing Telematic Control Unit (TCU) (Option SA633/SA638/SA639/SA664)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2008 BMW 750i, 2008 BMW 750Li, 2007 BMW 750i, 2007 BMW 750Li, and 2006 BMW 750i. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT:

Replacement with option SA638/SA664:

Carry out PROGRAMMING/CODING
If necessary, carry out coupling procedure

Replacement with option SA633/SA639:

Carry out PROGRAMMING/CODING
Via Diagnosis and Information System (DIS):
- Service functions
- Start subsequent assessment

Replacement with option SA633/SA638/SA639/SA664:

Remove sticker (Bluetooth passkey) from front of TCU and stick to Service Booklet insert

IMPORTANT:

Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DAMAGE (ESD PROTECTION)

NOTE:

FOLLOW INSTRUCTIONS FOR HANDLING FIBRE OPTIC CABLES .

Necessary preliminary tasks:

Disconnect battery negative lead
Remove and install LEFT LUGGAGE COMPARTMENT WHEEL ARCH TRIM .

Disconnect plug connection (1, 2).

Release screws (3) and remove TCU (4).

Installation:

Note colour coding of antenna plugs.

Fig 1: Identifying Plug Connection, Screws And TCU

Courtesy of BMW OF NORTH AMERICA, INC.

Replace 54-pin plug housing with a new one.

Raise lock (1) on housing (2).

Push both contact carriers (3) from rear out of housing.

Fig 2: Identifying Lock, Housing And Contact Carriers

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement with option SA633 or SA639/SA664 (build date 03/2005-09/2006):

Connect adapter leads (1) between main wiring harness (2) and TCU (3).

Resecure TCU (3).

Installation:

Secure protruding lead parts with suitable adhesive tape in order to prevent rattling noises.

Fig 3: Identifying Adapter Leads, Wiring Harness And TCU

Courtesy of BMW OF NORTH AMERICA, INC.