Communications Control Module: Service and Repair

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





Important!
Replacement with option SA638/SA664:
- Carry out programming/coding Programming and Relearning

- If necessary, carry out coupling procedure

Replacement with option SA633/SA639:
- Carry out programming/coding Programming and Relearning

- Via Diagnosis and Information System (DIS):

- Service functions

- Start subsequent assessment





Important!
Read and comply with notes on protection against electrostatic damage (ESD protection) 61 35 ... Notes on ESD Protection (Electro Static Discharge).





Note:
Follow instructions for handling fiber optic cables 61 00 ... Notes on Handling Optical Fibers.





Necessary preliminary tasks:
- Disconnect battery negative lead Instructions for Disconnecting and Connecting Battery

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