Abstract: The invention relates to a motor vehicle door, consisting of an interior sheet metal and an exterior sheeting, together which form a hollow interior space of the door, having an opening in the interior sheet metal and having a carrier module that closes said opening, and carries at least one functional part of the motor vehicle door, such as a hinge part, lock part or window lifter part. In order to simplify the assembly of a motor vehicle door it is proposed that the vehicle door (10) features, apart from the opening (18) in the interior sheet metal (12) which may be closed by means of a carrier module, an additional access opening (22) adequately large for inserting the carrier module, including the at least one functional part, into the interior space (16) of the door and that the carrier module consists of a base plate (20) which closes the opening (18) of the interior sheet metal (12) from the side of the hollow interior space (16) of the door.

Abstract: A method of assembling of a door comprising the steps of providing a door inner panel having an outer face and an inner face, at least one functional component of the door, an anti intrusion beam and a door outer panel. The functional component is assembled onto and towards the outer face. The anti intrusion beam is assembled towards the outer face prior to assembling the door outer panel towards the outer face. Fixing means secure the door inner panel, the functional component, the anti intrusion beam and the door outer panel relative to each other.

Abstract: Hollow-interior vehicle door consisting of an internal in its entirety essentially pot-shaped or pan-shaped stiffening structure, and of at least one external outer panel element being essentially lid-shaped and supported by the essentially pot-shaped or pan-shaped stiffening structure, such as a door skin, as well as of functional parts for practicing the door functions, and of optionally an inner panel element, in which the essentially pot-shaped or pan-shaped stiffening structure serves to accommodate functional parts of the vehicle door.

Abstract: A motor vehicle door includes structural parts for providing the rigidness of the vehicle door and includes a structural element and a lining element. The door further includes function components for providing vehicle door functions like a window panel with a regulator. At least one of the structural parts serves as a support of the function components. In order to reduce the number of individual components, at least one of the structural parts forms a completely shaped composite or sandwich part having a plastic based matrix and further having several of the function components included to serve a rigidness providing bodies. The bodies are molded into the plastic based matrix by the plastic based matrix.

Abstract: A method of assembling of a door comprising the steps of providing a door inner panel having an outer face and an inner face, at least one functional component of the door, an anti intrusion beam and a door outer panel. The functional component is assembled onto and towards the outer face. The anti intrusion beam is assembled towards the outer face prior to assembling the door outer panel towards the outer face. Fixing means secure the door inner panel, the functional component, the anti intrusion beam and the door outer panel relative to each other.

Abstract: A method for monitoring a serial transmission of digital data signals on two parallel data lines between mutually communicating signal processing devices in which the data signals are transmitted on the two data lines with mutually inverse signal levels. In order to ensure the operability of the input components of the signal processing devices, the signal levels of the signals which are received from the two data lines are compared individually or combined with at least one reference level limit which defines a limit of the permissible common-mode signal range for the operability of the signal processing devices.

Abstract: In data transmission between the unlike signal-processing devices in a motor vehicle, distortion of transmitted data may occur because of sources of disturbance internal and external to the vehicle due to super position of high frequency disturbances in transmitted data as well as due to short circuits or disconnections occurring in the system. To detect such conditions the level of transmitted data messages is compared with predetermined reference-level limits which may lie within and/or without the useful signal level range, e.g., "0" to "1". Detection of error conditions as well as determination of their cause is possible by use of the method.