
FM broadcasts are transmitted at high frequencies and do not bend to follow the earth’s surface. Because of this, FM broadcasts generally begin to fade at short distances from the station. Also, FM signals are easily affected by buildings, mountains, or other obstructions. These can result in certain listening conditions which might lead you to believe a problem exists with your radio.
The following conditions are normal and do not indicate radio trouble :


AM broadcasts can be received at greater distances than FM broadcasts. This is because AM radio waves are transmitted at low frequencies. These long, low frequency radio waves can follow the curvature of the earth rather than travelling straight out into the atmosphere.
When a cellular phone is used inside the vehicle, noise may be produced from the audio system. This does not mean that something is wrong with the audio equipment.
Replacement 1. Disconnect the negative (-) battery terminal. 2. Remove the heater and blower assembly. (Refer to Heater - "Heater Unit") 3. Loosen the mounting screws and remove the heater core cover (A).
Inspection 1. Turn the ignition switch OFF. 2. Disconnect the temperature control actuator connector. 3. Verify that the temperature control actuator operates to the cool position when connecting 12V to terminal 3 and grounding terminal 7.