1. Disconnect the negative battery cable..
2. Remove the following parts:
a. Upper column cover.
b. Instrument cluster.
c. Center panel.
d. Center cover.
e. Dashboard upper panel.
f. Front center speaker.
3. Verify the resistance between the front center speaker terminals.

If not within the specification, replace the front center speaker.

3.24—3.96 ohms
Entertainment System
Front Center Speaker Removal/InstallationABS HU/CM Removal/Installation
WARNING:
If the ABS HU/CM configuration is not completed, it could result in an unexpected
accident due to the ABS being inoperative. If the ABS HU/CM or ABS CM is replaced,
always use the automatic configuration function so that the ABS operation conditions
are correct.
CAUTI ...
How the SRS Air Bags Work
Your Mazda is equipped with the following types of SRS air bags. SRS air bags
are
designed to work together with the seat belts to help to reduce injuries during
an accident.
The SRS air bags are designed to provide further protection for passengers in
addition to the
seat belt functions. ...
Air Intake Actuator Inspection [Full Auto Air Conditioner]
1. Connect battery positive voltage to air intake actuator terminal B (or C),
connect terminal C (or B) to ground, and then verify that the air intake actuator
operates as shown in the table.
If the operation condition is not normal, replace the air intake actuator.
...