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 Disconnecting and Connecting Battery Negative Lead

- Remove luggage compartment floor storage tub Removing and Installing/Replacing Luggage Compartment Floor Storage Tub





Disconnect plug connections (2).
Disconnect antenna plug (4).
Release nuts (1) and remove TCU (3).

Installation Note:
Observe color coding of antenna plugs (4).