Communications Control Module: Service and Repair
84 11 660 - Removing and installing/replacing telematics control unit (TCU) (option SA633/SA638/SA639/SA664)
Important!
Replacement with option SA638/SA664:
- Carry out vehicle programming/coding Programming and Relearning
- If necessary, carry out coupling procedure
Replacement with option SA633/SA639:
- Carry out vehicle 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:
Comply with notes and instructions on handling optical waveguides 61 00 ... Notes on Handling Optical Fibers.
Necessary preliminary tasks:
- Disconnect battery negative lead 61 20 900 Disconnecting and Connecting Battery Negative Lead
- Remove luggage compartment floor trim 51 47 101 Removing and Installing/Replacing Luggage Compartment Floor Trim Panel
E91:
Release retaining clips (1) and remove storage pan (2).
Fold panel (3) upwards.
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 (4) slightly and feed out holder for telematics control unit / SES (2) in direction of luggage compartment.
Release wiring harness fastener (3) from holder for telematics control unit / SES (2).
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 ties (2).
Disconnect plug connection (1).
Disconnect plug connections of aerial cables (1).
Remove TCU (2).
Replacement up to build date 03/2007:
Note:
TCU Everest is replaced from 03/2007 by TCU 1.5.
1. Unclip cable holder (1) from TCU holder (2).
2. Connect aerial leads according to new layout (new cable routing as pictured)
3. Secure cable holder (1) to TCU holder (2) with cable tie