Rod operation

Engine speed	4, 400 RPM
Engine speed	Below	Above
Shutter valve actuator	Operate	Not operate

Stop the engine.
Connect the M-MDS to the DLC-2.
Verify that DTC P0661:00 or P0662:00 is not displayed.
- If DTC P0661:00 or P0662:00 is shown, perform the DTC inspection. (See DTC P0661:00 .) (See DTC P0662:00 .)
Inspect the variable intake air solenoid valve. (See VARIABLE INTAKE AIR SOLENOID VALVE INSPECTION .)

If the variable intake air solenoid valve is not normal, replace the variable intake air solenoid valve. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
If the variable intake air solenoid valve is normal, 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