| General Procedures | | -
The vehicles utilize a new form of module configuration called "central module configuration". Here, all of the necessary configuration parameters are stored in the generic electronic module (GEM) at the factory, and from there they are transmitted via the CAN bus network to the individual modules. The Worldwide Diagnostic System (WDS) now includes a new routine for replacing or subsequently changing the configuration data. This new routine is used to perform the central module configuration. However, in this case the data are no longer read into WDS like before - instead, they are transmitted by the GEM to the relevant module. WDS is only used to initiate and monitor the process. For safety reasons all of the configuration data which are saved in the GEM are also backed up in the instrument cluster. If the GEM then needs to be replaced, this means that the required configuration data can be read out from the instrument cluster with the aid of WDS and then transferred to the new GEM. The GEM checks the configuration data for consistency and stores a WDS trouble code (DTC) in the event of a fault. In the event of a fault the functionality of a particular module may be restricted. When installing a new GEM, both the key for the radio remote control and for PATS must be re-programmed (also see the description "Module Controlled Functions"). The procedure for this is the same as for current vehicles. | | | -
NOTE:Ensure that the most up-to-date software version is installed in WDS. NOTE:In the case of engine running concerns, module-reprogramming of the PCM may be required. To do this, a revised software version is transferred to the PCM via the GEM using WDS. In WDS, select "Central module configuration" from the tool box and follow the instructions. | | | -
NOTE:Following installation of a wheel/tire combination, for which the tire-tread circumference does not correspond to that of standard tires, the tire size must be changed in the GEM using WDS. In WDS, select the "Central module configuration" from the tool box and then the "Programmable parameters" submenu and enter the corresponding tire size under the "tire size" menu item. | | |
