An on-board computer still does not have every car on board today. After such a useful indicator for information on average consumption, service intervals, oil level or temperature, tire pressure, battery control, but also average speed, instantaneous speed, remaining range with existing tank filling, as a residual fuel or tank message and outdoor and indoor temperature, etc. many owners crave from slightly older car models. Additional functions such as a radio station search, phone hands-free and air conditioning features are additional features that are also considered useful. Whether the on-board computer speaks to one, then again is a matter of equipment.
In terms of on-board computers, the US was once a pioneer. These were already there in the 1970 years. While one still marveled in Germany about KITT, the talking car in the middle of the 1980 years in Germany, the development of the on-board computer in the USA took an even more rapid progress. In the meantime, people in Germany have gotten used to a talking on-board computer and also because it can be operated via touch buttons, gestures or the voice instead of using buttons. Especially the owners of smaller cars with minimal equipment long for a bit more modern in the car interior and therefore strive for a retrofit of an on-board computer. The available retrofit kits in the form of a data module for an on-board computer are limited to only a few functions such as battery voltage, speed, engine speed, acceleration, water temperature, oil temperature and route (in the form of a stage counter) and travel time. The lighting is not controlled by the retrofitted on-board computer.
Advantages retrofit on-board computer
Who retrofits an on-board computer, which clearly has an overhang on the advantage side. Because he receives in a simple and inexpensive way easy networking of different system. In addition, a central linkage of all relevant data and a better configurability of the systems. Often, thanks to the retrofitting of an on-board computer, the subsequent installation of additional accessories such as Cruise Control possible. And you can see at a glance whether the car is all right before you drive off. How far and how fast you drive can be seen while driving. The distance can be seen in some, the retrofit on-board computer in miles or in kilometers and the temperature either in Celsius or Fahrenheit. Another advantage of retrofitting an on-board computer is that the installation is often very simple.
Disadvantages retrofitting OEM on-board computer
Rather negative to see is in a retrofit of a full-fledged on-board computer that it can interfere with the computer of the on-board computer. The connection is quite complex and can ever bring a completely new wiring harness for the vehicle. If something is not connected correctly, then the trouble is inevitable. A possible fault can then spread throughout the vehicle system. And the replacement or repair of the on-board computer can also be expensive. Negative to see is generally the great expense of retrofitting of a factory on-board computer with regard to the necessary wiring in relation to the functions. This is especially true when the lighting on the on-board computer to be monitored in the future.
better an additional component with OBD connection
There are even for small money on-board computers, which are coupled to the OBD connection and even as Head-Up Display function. Such a part projects the most important engine data directly onto the windshield. Although this is not comparable to a factory head-up, the basic functions are there. Such an on-board computer usually shows speed and engine speed and the current fuel consumption is also in view. In addition there is often the fill level of the tank, a speed warning function, the display of the cooling water temperature and the battery level and also a "small" diagnosis of the vehicle can be carried out with such a part.
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