1. Inspect for resistance between the rear door speaker terminals using an ohmmeter.
2. To verify that the rear door speaker outputs sound, apply voltage to the rear door speaker and release using a 1.5-V battery.
Mazda 6 Service Manual: Variable tumble control system (vtcs) shutter valve actuator inspection
1. Remove the air hose. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION.)
2. Disconnect the vacuum hose from the VTCS shutter valve actuator.
3. Connect a vacuum pump to the VTCS shutter valve actuator.
4. Apply vacuum and verify that the rod moves.
If the rod dose not move, replace the intake ...
Mazda 6 Service Manual: Electric Parking Brake
The electric parking brake equipment applies the parking brake using an electric
motor. When the electric parking brake is applied, the electric parking brake switch
indicator light turns on.
WARNING
Do not drive the vehicle with the electric parking brake applied:
If the vehicle is driven ...