VARIABLE SWIRL CONTROL OPERATION [L3 Turbo]

Operation conditions

• When all of the following conditions are met, the PCM energizes the coil of variable swirl solenoid valve. As a result, negative pressure is introduced to the diaphragm chamber of the variable swirl shutter valve actuator, pulling the actuator rod and closing the variable swirl shutter valve.

- Engine coolant temperature: less than 60°C {140°F}

- Engine speed: less than 3,250 rpm

- Throttle valve opening: less than 3%

Inhibition conditions

• When a DTC for the engine coolant temperature sensor or throttle position sensor has been stored, the variable swirl control is inhibited and the variable swirl shutter valve is constantly open.