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

1. Connect the WDS or equivalent to the DLC-2.
2. Access the RPM PID.
3. Start the engine.
4. Inspect shutter valve operation under the following conditions.

VFAD shutter valve operation 

Fig 1: Checking VFAD Shutter Valve Operation

Courtesy of MAZDA MOTORS CORP.

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

1. Verify that DTC P1410 is not displayed.
   • IF DTC P1410 is shown, perform DTC inspection.

     (See DTC TABLES .)

2. 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.