Radio Reception Condition Inspection

Switch the ignition to ACC or ON (engine off or on).
Turn the audio unit power on.
Tune in the radio.
While pressing the POWER/VOLUME button, press the PRESET button 2 for 0.5 s or more.

Fig 1: POWER/VOLUME Button And PRESET Button 2
Courtesy of MAZDA MOTORS CORP.

Inspect according to the following table:

CAUTION:

Even if the system is normal, radio reception may be difficult depending on where the system is inspected (indoors/outdoors, or conditions at the location). Before inspecting the system, verify that radio reception is adequate.
When performing the inspection, select the best area for receiving radio frequencies.

Inspection	Display	Action
Verify the displayed screen.	LEV 10 - LEV 5	Antenna amplifier, antenna feeder and audio unit are normal.
	LEV 4 - LEV 3	Change frequencies and re-perform the inspection.
	LEV 2 - LEV 0	Inspect the center roof antenna and antenna feeder. (See CENTER ROOF ANTENNA INSPECTION .) (See ANTENNA FEEDER NO. 1 INSPECTION .) (See ANTENNA FEEDER NO. 2 INSPECTION .) (See ANTENNA FEEDER NO. 3 INSPECTION .) If the center roof antenna or antenna feeder is malfunctioning: Replace the malfunctioning part. (See CENTER ROOF ANTENNA REMOVAL/INSTALLATION .) (See ANTENNA FEEDER NO. 1 REMOVAL/INSTALLATION .) (See ANTENNA FEEDER NO. 2 REMOVAL/INSTALLATION .) (See ANTENNA FEEDER NO. 3 REMOVAL/INSTALLATION .) If the center roof antenna and antenna feeder are normal: Replace the audio unit. (See AUDIO UNIT REMOVAL/INSTALLATION .)

Switch the audio power supply off or switch the ignition off to end the diagnostic assist function.