Note
1. Set the front wheels straight ahead.

Caution
2. Turn the clock spring clockwise until it stops.
3. Turn the clock spring counterclockwise 2 3/4 turns.

4. Align the mark on the clock spring with the mark on the outer housing.
Clock spring removal/installation
Clock spring inspectionMazda 6 Service Manual: Front door speaker inspection
1. Inspect for resistance between the front door speaker terminals using an
ohmmeter.
If not as specified, replace the front door speaker.
2. To verify that the front door speaker outputs sound, apply voltage to the
front door speaker and release using a 1.5-V battery.
If not outp ...
Mazda 6 Service Manual: Pcv valve inspection
1. Disconnect the negative battery cable.
2. Remove the intake maniforld.(see INTAKE-AIR SYSTEM REMOVAL/INSTALLATION.)
3. Remove the PCV valve.
4. Blow through the valve and verify that air flows as specified.
If not as specified, replace the PCV valve.
Specification
...