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Communications Control Module: Service and Repair



84 11 660 Removing And Installing/Replacing Telematic Control Unit (TCU) (SA633/ SA639)







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







NOTE: Comply with notes and instructions on handling optical waveguides.






Necessary preliminary tasks:
- Clamp off battery negative lead
- Remove left luggage compartment wheel arch trim
- Partially remove wheel arch panel left at F10







Unscrew nuts (1).
Release screw (2).
Remove TCU holder (3) in direction of arrow.







Unlock plug connections (1) and disconnect.
Unfasten aerial plug (2) and disconnect.
Release all nuts.
Remove TCU (3) from holder (4).

Installation:
Observe colour coding of aerial plugs (2).







Replacement:
- Carry out vehicle programming/encoding
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