Service Procedure

1. Read the ESN number from the label in the Owner's Manual insert. The ESN is shown immediately above the bar code.





Note:
If the Owner's Manual insert cannot be located, connect the DISPlus/GT1 and perform a "Short test". Select "Control Unit Functions" / "TCU Telematic Control Unit" / "only US" / Read ESN number", and press "Display" to read the ESN number.

2. Using the TIS website, in the "Bulletins and Measures" section, press the special button marked "TCU lookup".





Follow the on-screen prompts to enter the vehicle VIN and ESN, then press "Enter" to display whether the TCU must be replaced, or not be replaced. Press the "Print" button and attach the printout to the repair order.

3. For vehicles where the TCU does not have to be replaced, no further work is necessary.

For vehicles where the TCU must be replaced, switch off the ignition and remove the TCU, which is located behind the trim in the left luggage compartment (on convertibles the TCU location is on the left rear bulkhead, accessed via the trunk).

[NEW]4. Before installing the new TCU, remove from it one copy of the Electronic Serial Number (ESN) label and place a copy on the repair order for reference during warranty claim entry. You will be asked for the new TCU "ESN" when submitting a claim in DCS net.





[NEW]5. If a second ESN label is available on the new TCU, affix it over the existing label on the Owner's Manual insert (P/N 01 49 0 157 963).

6. Install the new TCU and code it with DIS CD36.1 or higher (E46, E53) or CIP 10.1 or higher (E83, E85).

7. NOTE:
In order that the TCU replacement is properly recorded, FASTA must be activated in the DISPlus/GT1. For details on activating FASTA, refer to SI B07 07 01. Using DISPlus/GT1, select "Diagnosis" and delete any stored fault codes.

8. Test the BMW Assist service for proper operation by placing a test call.

Note:
The MEL button on the steering wheel must not be used.