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 ProcedureCustomer Assistance (Mexico)
Your complete and permanent satisfaction is our business. We are here to
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Authorized Mazda Dealers have the knowledge and the tools to keep your Mazda
vehicle in
top condition.
If you have any questions or recommendations for improvement regarding the
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Oil Control Valve (OCV) Inspection [Mzr 2.3 Disi Turbo]
Coil Resistance Inspection
1. Remove the battery cover..
2. Disconnect the negative battery cable..
3. Disconnect the OCV connector.
4. Measure the coil resistance between terminals A and B using a tester.
If not as specified, replace the OCV..
OCV coil resistance
6. ...
Cleaning the Window Interiors
If the windows become covered with an
oily, greasy, or waxy film, clean them with
glass cleaner. Follow the directions on the
container.
CAUTION
Do not scrape or scratch the inside of
the window glass. It could damage the
thermal fi laments and the antenna lines.
When wash ...