VAD shutter valve operation

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

VAD SHUTTER VALVE OPERATION

Engine speed	5, 800 rpm with TP_REL PIDs 50% or over
Engine speed	Below	Above
Shutter valve	Close	Open

If the shutter valve operation is not as specified, inspect as follows:

Verify that DTC P2676 or P2677 is not displayed.
- If DTC P2676 or P2677 is shown, perform DTC inspection.
  (See DTC TABLE .)
Inspect VAD control solenoid valve.
(See VARIABLE AIR DUCT (VAD) CONTROL SOLENOID VALVE INSPECTION .)
- If the VAD control solenoid valve is not okay, replace VAD control solenoid valve.
- If the VAD control solenoid valve is okay, inspect the following:
  - Vacuum hose looseness or damage
  - Vacuum chamber cracks or damage
  - Shutter valve actuator.
    (See VARIABLE AIR DUCT (VAD) SHUTTER VALVE INSPECTION .)
  - Shutter valve is stuck open or closed.