Variable Dynamic Effect Intake-air (VDI) Operation Inspection

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 the rod operation under the following condition:

ROD OPERATION DESCRIPTION - VDI OPERATION INSPECTION

Engine speed	7,250 RPM
Engine speed	Below	Above
Shutter valve actuator	Not operate	Operate

If the rod operation is not as specified, inspect as follows:

Stop the engine.
Connect the WDS or equivalent to the DLC-2.
Verify that DTC P0076 or P0077 is not displayed.
- If DTC P0076 or P0077 is shown, perform DTC inspection.
  (See DTC TABLE .)
Inspect the VDI solenoid valve.
(See VARIABLE DYNAMIC EFFECT INTAKE-AIR (VDI) SOLENOID VALVE INSPECTION .)
- If the VDI solenoid valve is not normal, replace the VDI solenoid valve.
- If the VDI solenoid valve is normal, inspect the following:
  - Vacuum hose and vacuum chamber for looseness or damage
  - Shutter valve actuator
    (See VARIABLE DYNAMIC EFFECT INTAKE-AIR (VDI) ACTUATOR .)
  - Shutter valve stuck open or closed