Audio Control Switch Inspection

Disconnect the negative battery cable.
Remove the driver-side air bag module. (See DUAL-STAGE DRIVER-SIDE AIR BAG MODULE .)
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 Table
  Courtesy of MAZDA MOTORS CORP.
  
  Fig 2: Identifying Audio Control Switch Connector Terminals
  Courtesy of MAZDA MOTORS CORP.

AUDIO CONTROL UNIT RESISTANCE