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 ProcedureOuter Mirror Garnish Removal/Installation
1. Disconnect the negative battery cable..
2. Remove the outer mirror glass from the outer mirror..
3. Pinch the end of the tab which is visible, and release the tab by pressing
it toward the vehicle front (3 locations).
4. Grasp the upper side of the outer mirror garnish and remove it b ...
Electro Hydraulic Power Assist Steering (EHPAS) Control Module Inspection
Terminal Voltage Table (Reference)
Terminal
Signal name
Connected to
Measured item
Measured terminal (measured condition)
Standard
Inspection item(s)
1A
Ground
Ground ...
Recommended Oil
U.S.A., Canada, and Puerto Rico
Use SAE 0W-20 engine oil.
Mazda Genuine Oil is used in your
Mazda vehicle. Mazda Genuine 0W-20
Oil is required to achieve optimum fuel
economy.
For maintenance service, Mazda
recommends Mazda Genuine Parts and
Castrol ® (U.S.A. only).
Only use SAE 0W- ...