Audio Control Switch Inspection

Disconnect the negative battery cable.
Remove the driver-side air bag module. (See DRIVER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION .)
Disconnect the audio control switch connector.

Verify the resistance and continuity between the audio control switch terminals.

If the resistance and continuity are not as indicated in the tables, replace the audio control light switch.

Fig 1: Audio Control Switch Continuity Chart
Courtesy of MAZDA MOTORS CORP.

Fig 2: Identifying Audio Control Switch Terminals
Courtesy of MAZDA MOTORS CORP.

R: Resistance. See the table.

RESISTANCE SPECIFICATION

Switch position	Resistance (ohm)
VOL-button ON	51-56
VOL+ button ON	140-154
AUTO SCAN button ON	286-315
PRESET button ON	534-589
MODE button ON	985-1,080
MUTE button ON	1,940-2,130
OFF	4,800-5,290