Variable Swirl System Operation Inspection

1. Access the ECT PID using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST .)
2. Verify that the ECT PID is below 0°C {32°F}. 
3. Start the engine.
4. Inspect the rod operation under the following conditions:

Rod operation 

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

1. Perform the KOER self test using the M-MDS and verify that the DTCs P2004:00, P2006:00, P2009:00 or P2010:00 is not displayed. (See KOEO/KOER SELF TEST .)
   • If the DTC P2004:00, P2006:00, P2009:00 or P2010:00 is displayed, perform DTC inspection. (See DTC P2004:00 .) (See DTC P2006:00 .) (See DTC P2009:00 .) (See DTC P2010:00 .)

If simulation function of M-MDS is used: 

1. Switch the ignition to ON (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 .)
   • If the operation sound is not heard, inspect the following:
     • Vacuum hose and vacuum chamber for looseness or damage
     • Variable swirl shutter valve actuator (See VARIABLE SWIRL SHUTTER VALVE ACTUATOR INSPECTION .)
     • Check valve is stuck open or closed.
     • Shutter valve cannot move smoothly.

If simulation function of M-MDS is not used: 

1. Inspect the variable swirl solenoid valve. (See VARIABLE SWIRL SOLENOID VALVE INSPECTION .)
   • If the variable swirl solenoid valve is not normal, replace the variable swirl solenoid valve. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
   • If the variable swirl solenoid valve is normal, inspect the following:
     • Vacuum hose and vacuum chamber for looseness or damage
     • Variable swirl shutter valve actuator (See VARIABLE SWIRL SHUTTER VALVE ACTUATOR INSPECTION .)
     • Check valve is stuck open or closed.
     • Shutter valve cannot move smoothly.