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What does CAN-Bus technology mean?

CAN Bus Technologie
CAN Bus Technologie
On our website you will with some products run across the terms CAN-Bus, RS232, OBDII, K-line, … . Who doesn’t know what to do with this terms, this is the place to be.

Since the number of electronically systems for the improvement of driving performance- and dynamic, safety and comfort are increasing constantly and therefore the wiring harnesses continually are getting thicker, the wiring and vehicle weight continually more, the control units are connected with each other. Was for example the speed signal in the past only needed for the indication in the speedometer, are today also systems like engine control, gearbox, steering, ABS, ASR, ESP, air conditioner, navigation up to the radio fed with this signal. The same counts for a whole row of further signals. For the connection of all involved systems over a data-bus , each signal is only once created in the vehicle and over the two Bus-wiring allocated for all other systems.

In order that this works, all components in the systems have to speak and understand the same language. The dictionary of this language is the communication-protocol. When looked up in the internet, one will hit on many descriptions. That’s why here you will only find short information about the connection and what we do with it.


The controller Area Network (CAN) is the today standard among the connections between the respective control units. Over two twisted together data wirings the messages are exchanged between the two components in the vehicle. This technology is very efficient as far as the volume of date and speed (up to 1 Mbit/s) is concerned, but is stretched to its limits with the newest developments in vehicle construction.


The forerunner of Bus-technique in the vehicle electronics was the serial communication over the RS232 protocol. Over this far less volume of data at lower data speed can be transported.


OBDII Stecker
Each car with gasoline engine from 2001 and diesel engine from 2004 must be equipped with an OBDII interface for error diagnostics (e.g. exhaust analysis). The allocation of certain pins in these 16-pins, in all vehicles the identical connection is worldwide regulated, all further ones the manufacturer can allocate or let free according to his taste. So it is quite possible, that here also CAN-wirings (most pin 6 and 14) are found, which can be used for the communication with our devices.

When you click on the image with the OBDII connector, you will get a list, in that shows which protocol you have to select for your vehicle.


K-Line is the designation of the single core data line of the OBDII-interface (Pin 7). Over it runs a bidirectional data-bus with low volume of data and quite slow (9600 or 10400 Baud), but which is enough for the diagnosis.

The Symbols on our webside

All devices with ECT-symbols can communicate over the CAN bus. To distinguish are the two varities:

Easy Connection Technology AIM Easy Connection Technology
This signalizes the internal AIM – CAN – BUS, whereat several AIM- devices can be connected with each other. This has the advantage, that you can expand one base – device (MXL(MyChron4) at anytime by a slave – device (GPS, LCU 2). With this sign the respective device can communicate with the vehicle – ECU. Condition therefore is that a communication – protocol is deposited. Here you will find all vehicles, which we currently support.
Easy Connection Technology AIM Easy Connection Technology

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