84 11 660 Removing and installing (replacing) Telematic Control Unit (TCU) (SA633/SA638/SA639/SA664)

WARNING: This page is about a different variant/trim than selected.

IMPORTANT: Replacement with option SA638/SA664:

Replacement with option SA633/SA639:

Carry out VEHICLE PROGRAMMING/ENCODING
Via Diagnosis and Information System:
- Service functions
- Start subsequent assessment

For vehicles with Teleservices optional equipment:

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

NOTE: Comply with notes and instructions on HANDLING OPTICAL FIBRES .

Necessary preliminary tasks

E91:

Release mounting clips (1) and remove storage tray (2).

Fold panel (3) upwards.

Fig 1: Identifying Panel, Storage Tray And Mounting Clips

Courtesy of BMW OF NORTH AMERICA, INC.

E88/E93:

Unscrew nuts (1).

Remove holder for telematics control unit/SES (2) in direction of arrow from body.

Raise panel for luggage compartment partition wall slightly (4). Feed out holder for TCU/SVS (2) towards the luggage compartment.

Release wiring harness fastener (3) from holder for telematics control unit/SES (2).

Fig 2: Identifying Telematics Control Unit/SES, Wiring Harness Fastener And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Make sure guides (5) are correctly seated in associated body holders.

Make sure wiring harness is correctly laid.

Release nuts (1) and unclip cable clips (2).

Fig 3: Identifying Nuts And Cable Clips

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connection (1).

Fig 4: Identifying Plug Connection

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect plug connections on the aerial lines (1).

Remove TCU (2).

Fig 5: Identifying Aerial Lines

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Only for replacement of version up to 03/2007:

NOTE: TCU Everest is replaced by TCU 1.5 from 03/2007.

Unclip cable clip (1) from holder for TCU (2)
Connect aerial lines after the re-arrangement (new cable routing as illustrated)
Secure cable clip (1) to holder on TCU (2) using cable straps

Fig 6: Identifying TCU And Cable Clip
Courtesy of BMW OF NORTH AMERICA, INC.