• A new totality was needed, one system that could handle everything. All the components had to be able to communicate, "understand" one another's language, integrated within this one system. One specification, one supplier
• The Volvo S80 not only has a new electrical system- many cars have advanced electrical systems, the Volvo S80 features the multiplex system which is a new method for signal communications.
• The electrical system is designed as a communication network of 18 computers with central control units and no fewer than 24 modules for most electrical functions. These modules function like computers and control the electrical functions in the car whenever necessary.
• Multiplex technology involves only two cables. One of them is able to carry all the signals in the system at the same time. The other is the electrical cable which carries the necessary power. These cables run around the entire car and are known as the databus.
• The information travels in digital packages. All the small network modules are able to recognize "their" signal for action and do as they are told.
• When the signal "open left front window" arrives, for example, only one module (in the front door) reacts to it, receives it and transmits an "order" to the electric motor to lower the window.
• Signals are continuously able to alert and activate the different modules as a result of the capacity of the system, which also operates at two speeds depending on the function.
The engine and transmission management uses a high-speed databus, whereas all the other functions use a slightly slower databus.
• The benefits of the multiplex system are considerably fewer cables and connections in the car, improved reliability, communication between all the components and software adaptations, easier and improved opportunities for the retro-installation of electrical functions and so on.
• The system also has the benefit of self-diagnosis for all functions, including engine management, making the OBD II (On Board Diagnostics) unit even more important than before. Diagnosis is easier, as is servicing. Information about a fault or malfunction is passed on to the driver by indicator lamps and a message display in the instrument cluster.
• All the cables in the system are fitted in well-protected cable ducts.
• The multiplex system in each car is programmed according to model specifications and fitted options.
How You Sit and Feel Behind the Wheel
• No matter how much power you have under your right foot or how quick and responsive the steering is, if you cannot sit in comfort you do not feel good and the driving experience is negative. Physical well-being behind the wheel instantly transforms itself into mental well-being as well. A state of mind that is necessary in order to be a good, safe and alert driver.
• The driver's environment must be the optimum combination of correct ergonomics, comfort and pleasure, with harmonious colors and materials. Function and feeling must be well-balanced. Everything must radiate a feeling of high quality. In order to really experience a car and have the best chance of doing so, you have to sit correctly.
• For many years, Volvo has had a reputation for very good seat comfort.
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