Structurally, the electronic unit is designed in such a way as to exclude the influence of external electromagnetic interference on it.
However, if the vehicle is equipped with a CB radio, etc. (even if the output power is only 10W), then it may in some cases affect the operation of the electronic unit, especially when the antenna and connecting (feeder) cables are laid next to the electronic control unit.
Therefore, the following precautions must be observed.
1. Install the antenna as far as possible from the electronic box. Therefore, the antenna must be installed at the rear of the vehicle.
2. Lay the antenna cable as far as possible from the wiring of the electronic control unit, at least 20 cm, and especially do not twist them together.
3. Check if the setting is correct (harmonization) antenna cable and antenna.
4. Do not install a powerful radio station on the car.