Workshop Hints

Workshop Hints

Installation of a New CAS

A new CAS must ordered on a VIN-specific basis (key number, vehicle identification number, standard equipment) and installed in the relevant vehicle.

The new CAS must then be coded using the BMW DISplus, GT-1 or MoDiC III. Alignment of the CAS and DME (ECM) must also be carried out, only then can the engine be started.

Installation of a used CAS control unit is of limited use, as it will not be possible to open the vehicle using the original remote control or start the engine.

Replacement of Both CAS and Instrument Cluster (two new components)

Where possible, this should be avoided, as the current mileage reading and all the CBS data are irretrievably lost!

If both control units have to be replaced at one time, the following installation sequence is recommended:

1. Replacement of the instrument cluster
2. Coding of vehicle identification number
3. Terminal 15 OFF/ON (possible data transfer)
4. Replacement of the CAS
5. Coding of vehicle identification number
6. Terminal 15 OFF/ON

When terminal 15 is switched on again, the manipulation dot is extinguished. The communication between the instrument cluster and the CAS for redundant data storage is now available.

Remember, when replacing a CAS or KOMBI:

- The manipulation dot is set if the vehicle identification number in the CAS is different from the vehicle identification number in the instrument cluster.
- If the vehicle identification numbers are different, data exchange takes place in the working memory of the instrument cluster; however, no data is stored permanently.
- The instrument cluster adopts the data from the CAS if the CAS has a higher mileage reading than the instrument cluster and the vehicle identification numbers match.
- The CAS adopts the data from the instrument cluster if the instrument cluster has a higher mileage reading and the vehicle identification numbers match.
- The mileage is transferred from the instrument cluster to the CAS every 10 km (6 miles) of the trip. If at least 24 hours have elapsed between switching terminal 15 on and off, then another download is performed, regardless of the distance driven.