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.
Coil Antenna Removal/Installation
Entertainment Personalization Features Setting ProcedureHood Release Cable Removal/Installation
1. Disconnect the negative battery cable..
2. Remove the battery tray..
3. Remove the Front mudguard (LH)..
4. Remove the hood release cable from clips A.
5. Remove the clips B.
6. Disconnect the hood latch from the hood release cable.
7. Remove the hood release cable from outside of ...
Personalization Features
The following personalization features can be set or changed by an Authorized
Mazda
Dealer. Consult an Authorized Mazda Dealer for details.
Additionally, some of the personalization features can be changed by the
customer
depending on the feature.
Personalization features which can be ch ...
Stop Vehicle in Safe Place Immediately
If any of the following warning lights turns on, the system may have a
malfunction. Stop the
vehicle in a safe place immediately and contact an Authorized Mazda Dealer.
...