Audio Control Switch Inspection

WARNING: This page is about a different car, the 2008 Mazda 5. However, it is still accessible from the selected car via links, so may be relevant.

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 terminal c and d.

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

Fig 1: Audio Control Switch Terminals 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
PRESET+ button ON	286-316
PRESET- button ON	533-590
MODE button ON	984-1,089
VOICE/MUTE button ON	1,934-2,139
OFF	4,794-5,300

Connect the positive battery to the audio control switch terminal F, the negative battery to the audio control switch terminal E.
Verify that LED illuminated.
- If there is any malfunction replace the audio control switch.