Variable swirl control actuator consists of DC motor and motor position sensor(potentiometer) which detects the position of swirl valve.
As closing one intake port out of two at idle and below 3000RPM, swirl effect is taken on intake air. This swirl effect increases air flow rate.
However, because air flow rate is too high, swirl effect is neglectable thus, swirl valve is opened for efficiency of intake air.
To prevent swirl valve and shaft form being stuck by foreign metarial, and to learn max opening and closing position of swirl valve, it is fully opened and closed twice at turning engine OFF.
? Swirl
The air flow which indicates Intake air swirls with respect to the axis passing through the centre of piston with length-direction by intake port which is eccentric from the centre of combustion chamber.
P2016 is set when variable swirl valve position sensor output voltage below 0.13V is detected for more than 2.5 sec.. This code is due to open in power circuit or short to ground in signal circuit.
Item
Detecting Condition
Possible Cause
DTC Strategy
Voltage monitoring
Variable swirl valve position sensor circuit
Variable swirl valve position sensor component
Enable Conditions
IG key ON or engine running
Threshold Value
VSCA Output voltage below minimum value. (below 130mV)
Diagnostic Time
2.5 sec.
Fail Safe
Fuel Cut
NO
Swirl valve opened at variable swirl control actuator failure.
EGR Off
Fuel Limit
Check
Lamp
OFF
Fig.1) Close control signal waveform of VSA
Fig.2) Opne control signal waveform of VSA
Fig.3) Learning waverform of VSA position when IG ON ? OFF