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Most car part  retailers stock our products. We will be glad to inform you about a competent sales partner in your vicinity.

CAN data bus technology (also called CAN bus technology: Controller Area Network) is a special type of data transmission in cars. It forms the backbone of the electronic network as a compact, central data distributor in modern cars and connects the majority of car control units with each other, exchanging data and transmitting signals to activate functions.

Today a modern car contains up to 70 different electronic control units that exchange messages with each other  providing various utilities.

Using coventional wiring, the number of lines, plug connections and fuse boxes necessary for this package would be unmanageable. Production processes would be lengthy and sources of errors would be difficult to determine.  CAN data bus technology provides the perfect electronic solution for this problem.

For some vehicles, the trailer control unit is also connected to the on-board network of the car using CAN data bus technology.

CFC® stands for CAN frequency control – an electronic installation kit from JAEGER automotive for trailer control and functional monitoring of the future. It was developed for modern vehicles that are fitted with CAN data bus technology.

If your car has digital data bus technology and you want to fit a tow-bar to it, you can install the JAEGER automotive CFC® electronic installation kit in a few work steps.

The intelligent CFC® trailer module has got a microprocessor in the CFC® electronic installation kit. This trailer module comunicates  with the CANetwork in your car and optimises it for new tasks.

All lighting functions of the trailer are controlled by the Body Controller and conveniently monitored.

The AFC / CFC® module requires a 12 Volts constant positive connection to operate the electronic control module. Indicator and trailer lighting would malfunction without this power supply.

A constant 12 volts positive connection is absolutely necessary to energize hazard  and parking lights in case of breakdown.

The trailer socket can not be fully controlled with a trailer test device with LED technology as the trailer control modules send out a test current for detecting the trailer.  Please use a light bar with genuine 21 Watt lamp load, a trailer or a bike carrier for correct control.

Modern trailer modules communicate with the control units of the vehicle. Comfort functions such as lamp failure notification, parking assistant switch off, stabilisation and fog light shut down only operate when the drawing vehicle has“learned” that a tow-bar is installed. For this reason, it is necessary for the vehicle to be coded  for trailer towing purposes utilising preferably manufacturers genuine diagnostic testers.

CAN data bus technology (also called CAN bus technology: Controller Area Network) is a special type of data transmission in cars. It forms the backbone of the electronic network as a compact, central data distributor in modern cars and connects the majority of car control units with each other, exchanging data and transmitting signals to activate functions.

Today a modern car contains up to 70 different electronic control units that exchange messages with each other  providing various utilities.

Using coventional wiring, the number of lines, plug connections and fuse boxes necessary for this package would be unmanageable. Production processes would be lengthy and sources of errors would be difficult to determine.  CAN data bus technology provides the perfect electronic solution for this problem. 

For some vehicles, the trailer control unit is also connected to the on-board network of the car using CAN data bus technology.

The ground pole of the battery was probably not disconnected as prescribed in thefitting instruction. The control module can then not register on the vehicle system.
For a reset of the module see Troubleshooting CFC®-PDF.

Lexicon - JAEGER automotive is glad to help you

The lexicon covers all important terms regarding our range of products. The entries are listed alphabetically. You can find an article of your interest using the search function. All entries can also be  found using the alphabetical index.

Check - Control (CC)
Check-Control is the collective term for the functions: Light monitoring, light failure control and light test device.

The Check-Control can  be integrated in an on-board computer. It visually and/or acoustically displays faults or failures of the light functions (for example, low beam, brake light, etc.).

To check whether a vehicle is fitted with Check-Control and which individual light functions are monitored, unscrew the individual bulbs of the drawing vehicle to simulate a fault.  The Check-Control function is installed if a fault message appears on the combo instrument. The car is not fitted with this system if the fault message does not appear.

If available, the Check-Control function is  explained in the operating manual of the vehicle.

If a tow-bar is retrofitted, a vehicle-specific electrical kit must always be used to ensure compatibility with the on-board unit of the drawing vehicle with Check-Control. Using an incorrect electrical kit often leads to the destruction of electronic components or light failures or defects.

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