1. Disconnect the negative battery cable..
2. Remove the following parts:
a. Front scuff plate.
b. Rear scuff plate.
c. B-pillar lower trim.
d. Front seat belt adjusting cover.
e. Front seat belt upper anchor installation bolt.
f. B-pillar upper trim.
g. Rear seat cushion.
h. Trunk side upper trim.
i. D-pillar trim.
j. C-pillar trim.
3. Remove the rear passenger's assist handle..
4. Partially peel back the headliner.
NOTE:
If the headliner is peeled back excessively, the headliner could become creased. Be careful not to peel back the headliner excessively.
5. Disconnect antenna feeder No.2.
6. Disconnect the roof antenna connector.
7. Disconnect the glass antenna.
8. Verify that the continuity between antenna feeder No.3 terminals is as indicated in the table.

If not as indicated in the table, replace antenna feeder No.3.

Antenna Feeder No.2 Removal/Installation
Antenna Feeder No.3 Removal/InstallationAdd-On Non-Genuine Parts and Accessories
Non-genuine parts and accessories for Mazda vehicles can be found in stores.
These may fit your vehicle, but they are not approved by Mazda for use with Mazda
vehicles. When you install non-genuine parts or accessories, they could affect your
vehicle's performance or safety systems; the Maz ...
Wheel Alignment Pre Inspection
1. Park the vehicle on level ground, in an unloaded condition*, with the wheels
straight forward.
*: Unloaded condition.....Fuel tank is full. Engine coolant and engine oil are
at specified level. Spare tire, jack and tools are in designated position.
2. Inspect the tire pressure.
...
PCM
Purpose/Function
High-level driveability and lower fuel consumption have been realized by
controlling the appropriate engine conditions (fuel injection/ignition timing)
according to operation conditions.
Controls each output part based on the signal from each input part.
...