Variable Swirl System Operation Inspection

1. Connect the M-MDS to the DLC-2.
2. Access the ECT PID.
3. Verify that the ECT PID is below 60°C {140°F}  .
4. Start the engine.
5. Inspect the rod operation under the following conditions:

Engine speed	3,750 rpm
	Below	Above
Shutter valve actuator	Operate	Not operate

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

1. Perform the KOER self-test using the M-MDS and verify that DTCs No. P2004, P2006, P2009 or P2010 are not displayed.
   • If DTC No. P2004, P2006, P2009 or P2010 are displayed, perform DTC inspection.

     (See DTC TABLE[L3 WITH TC] ).

If simulation function of M-MDS is used: 

1. Turn the ignition switch to the ON position. (Engine off)
2. Turn the variable swirl solenoid valve from off to on using the IMRC PID and verify that the operation sound of the solenoid valve is heard.
   • If the operation sound is not heard, replace the variable swirl solenoid valve.

     (See VARIABLE SWIRL SOLENOID VALVE INSPECTION[L3 WITH TC] ).

   • If the operation sound is not heard, inspect the following:
     • Vacuum hose and vacuum chamber for looseness or damage
     • Shutter valve actuator

       (See VARIABLE SWIRL SHUTTER VALVE ACTUATOR INSPECTION[L3 WITH TC] ).

     • Check valve is stuck open or closed
     • Shutter valve cannot move smoothly

If simulation function of M-MDS is not used: 

1. Inspect variable swirl solenoid valve.

   (See VARIABLE SWIRL SOLENOID VALVE INSPECTION[L3 WITH TC] ).

   • If the variable swirl solenoid valve is not normal, replace the variable swirl solenoid valve.
   • If the variable swirl solenoid valve is normal, inspect the following:
     • Vacuum hose and vacuum chamber for looseness or damage
     • Shutter valve actuator

       (See VARIABLE SWIRL SHUTTER VALVE ACTUATOR INSPECTION[L3 WITH TC] ).

     • Check valve is stuck open or closed
     • Shutter valve cannot move smoothly