84 11 650 Removing and installing/replacing telematic control unit (TCU) (option SA633/SA638/SA639/SA664)

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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

IMPORTANT: Read and comply with NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE) .

NOTE: Follow INSTRUCTIONS FOR HANDLING FIBRE OPTIC CABLES .

Necessary preliminary tasks:

Disconnect BATTERY NEGATIVE LEAD .
Remove LUGGAGE COMPARTMENT WHEEL ARCH TRIM ON LEFT .

Unlock plug connections (1) and (2) and disconnect.

Unfasten antenna plug (3) and disconnect.

Release nuts (4) and remove TCU (5).

Installation:

Observe color coding of aerial/antenna plugs (3).

Fig 1: Identifying TCU, Aerial/Antenna Plugs And Plug Connections

Courtesy of BMW OF NORTH AMERICA, INC.