The warning light turns on when the system has a malfunction.
Refer to Warning Lights on .
Brake Pad Wear Indicator
When the disc brake pads become worn, the built-in wear indicators contact the disc plates. This causes a screeching noise to warn that the pads should be replaced.

When you hear this noise, consult an Authorized Mazda Dealer as soon as possible.
| WARNING Do not drive with worn disc pads: Driving with worn disc pads is dangerous. The brakes could fail and cause a serious accident. As soon as you hear a screeching noise consult an Authorized Mazda Dealer. |
Parking Brake
Brake AssistRear Combination Light Removal/Installation
4SD
1. Disconnect the negative battery cable..
2. Remove the following parts:
a. Trunk mat.
b. Trunk board.
c. Trunk end trim.
d. Trunk side trim.
3. Disconnect the connectors shown in the figure and remove the nuts.
4. Pull the rear combination light in the direction of the arrow ...
Power Metal Oxide Semiconductor Field Effect Transistor (Power Mos Fet) Inspection
[Full Auto Air Conditioner]
1. Verify that the continuity between the power MOS FET terminals is as indicated
in the table.
If there is any malfunction, replace the power MOS FET.
If the blower motor operation is not normal even though no malfunction can
be verified, inspect the climate control unit..
...
Camshaft Position (CMP) Sensor Removal/Installation [Mzr 2.0, Mzr 2.5]
CAUTION:
When replacing the CMP sensor, make sure there is no foreign material on
it such as metal shavings. If it is installed with foreign material, the sensor
output signal will malfunction resulting from fluctuation in magnetic flux and
cause a deterioration in engine control.
...