Mazda 3 Service Manual: Confirmation Step 3: Antenna System Simple Inspection [Radio]

• Because the antenna system is equipped with a capacitor, the continuity cannot be checked. Therefore proceed the following simple inspection.

• Turn the AM radio on.

• Tune to the frequency that there is no broadcast and you will hear a buzzing sound.

• Turn a work light on and shake it around the antenna rod. (around 10—20 mm {0.40—0.78 in})

  CAUTION:

  • Use a fluorescent light type for the inspection. Accurate diagnostic cannot be done with a different type of light.

    

    
    

• If a whirring sound from the speaker synchronized to the work light movement is confirmed, the antenna system is normal.