How the Vehicle Audio System Works

AM and FM radio signals are broadcast from transmission towers located around the city. They are picked up by the vehicle's radio antenna. The signal is then received by the radio and sent to the vehicle's speakers.

When a strong radio signal reaches the vehicle, the precise construction of the audio system ensures the best possible sound quality.

However, in some cases, the signal reaching the vehicle may not be strong and clear.

This may be caused by factors such as distance from the radio station, proximity to other strong radio stations, or nearby buildings, bridges or other large objects that block the signal.

AM signals can be received from greater distances than FM signals because AM radio waves are transmitted at lower frequencies. These long, low-frequency radio waves tend to follow the curvature of the earth rather than travel straight into the atmosphere. They can also bend around objects, which provides better signal reception range.

FM radio signals are transmitted at high frequencies and do not bend along the surface of the earth. For this reason, FM stations often begin to fade at a short distance from the station. In addition, FM signals are often disturbed by buildings, mountains, or other obstacles. These listening conditions may lead you to suspect a radio problem. The following conditions are normal and do not indicate any radio problem:

• Fading: As the vehicle moves away from the radio station, the signal becomes weaker and the sound begins to fade. When this happens, we recommend selecting another, stronger station.
• Noise/Interference: Weak FM signals or large obstacles between the transmitter and the vehicle radio may disturb the signal and cause noise. This effect can be reduced by lowering the treble until the interference disappears.

• Station Switching: As the FM signal becomes weaker, a different, stronger signal with a similar frequency may begin to be received. This happens because the radio is designed to receive the strongest signal. In this case, select another station with a stronger signal.
• Multipath Cancellation: Radio signals received from several directions may cause sound distortion or noise. This may be caused by a direct signal and a reflected signal from the same station, or by signals of similar frequencies from two stations. In this case, select another station until the reception conditions change.

Using a Mobile Phone or Two-Way Radio

When a mobile phone is used in the vehicle, the audio system may cause interference. This does not mean that there is any problem with the audio system. In this case, use the mobile phone in a location as far as possible from the audio system.

CAUTION When using a communication system such as a mobile phone or a two-way radio inside the vehicle, a separate external antenna must be installed. If a mobile phone or radio is used with only the internal antenna, it may interfere with the vehicle's electrical system and adversely affect safe operation. WARNING Do not use a mobile phone while driving. To use it, stop the vehicle in a safe place.