With the release of CarMaker 8.0 the procedure to replace the CarMaker model by a user defined model has changed and is now more convenient.

Since CarMaker 8.0:
Selecting Model Manager off in the relevant part of the Vehicle Data Set is now sufficient to deactivate the built-in CarMaker models of this subsystem.

Example: If you would like to replace the CarMaker steering models by your own Simulink model you have to choose Model Manager off in the Steering tab as shown below:

Before CarMaker 8.0:
In earlier versions of CarMaker, you need to use command arguments to deactivate specific CarMaker models:

-disable< model >

Selecting "Model Manager off" in the Vehicle Data Set is not sufficient to deactivate the entire model during the simulation!

Example: If you would like to replace the steering model with your own model you need to add -disablesteering in the Model Configuration as shown below:

Please have a look into chapter CarMaker for Simulink and CarMaker for Simulink > Demonstration Examples of the Programmer's Guide for more detailed information about the usage of CarMaker for Simulink. In the Reference Manual you can find a detailed overview of the specific interface variables (inputs and outputs) for each model.