Variable Fresh Air Duct (VFAD) Control System Operation Inspection (13B-MSP (High Power))

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.

Connect the WDS or equivalent to the DLC-2.
Access the RPM PID.
Start the engine.

Inspect shutter valve operation under the following conditions.

VFAD SHUTTER VALVE OPERATION

Engine speed	5,000 RPM
Engine speed	Below	Above
Shutter valve	Close	Open

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

Verify that DTC P1410 is not displayed.
- If DTC P1410 is shown, perform DTC inspection.
  (See DTC TABLE .)
Inspect VFAD solenoid valve.
(See VARIABLE FRESH AIR DUCT (VFAD) SOLENOID VALVE INSPECTION (13B-MSP (HIGH POWER)) .)
- If the VFAD solenoid valve is not normal, replace VFAD solenoid valve.
- If the VFAD solenoid valve is normal, inspect the following:
  - Vacuum hose looseness or damage
  - Vacuum chamber cracked or damaged
  - Shutter valve actuator
    (See VARIABLE FRESH AIR DUCT (VFAD) ACTUATOR INSPECTION (13B-MSP (HIGH POWER)) .)
  - Shutter valve is stuck open or closed.