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Variable Intake Air System Operation Inspection

Start the engine.
Inspect the rod operation under the following condition:

Rod operation

ROD OPERATION

Engine speed	Approx. 4,500 RPM
Engine speed	Below	Above
Shutter valve actuator	Operate	Not operate

If the rod operation is not as specified, inspect as follows:
1. Stop the engine.
2. Connect M-MDS to the DLC-2.
3. Verify that DTC P0661 or P0662 is not displayed.
  - If DTC P0661 or P0662 is shown, perform DTC inspection.
    (See DTC TABLE ).
4. Inspect Variable intake air system control solenoid valve.
  (See VARIABLE INTAKE AIR SOLENOID VALVE INSPECTION ).
  - If the Variable intake air solenoid valve is not okay, replace Variable intake air solenoid valve.
  - If the Variable intake air solenoid valve is okay, inspect the following:
    - Vacuum hose and vacuum chamber for looseness or damage
    - Shutter valve actuator
      (See VARIABLE INTAKE AIR SHUTTER VALVE ACTUATOR INSPECTION ).
    - Shutter valve stuck open or closed