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P2009 Variable Swirl Actuator Motor - Circuit Low

AutoHex Online Help: Hyundai i30(GDe) 2013
Component Location
General Description

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 efficient intake of 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.



DTC Description

P2009 is set when open or short to ground in variable swirl actuator driving motor (+) output terminal. The polarity of (+) and (-) lines shift each other in accordance with the condition of swirl valve(opened or closed) thus, checking both (+) and (-) circuits is required.

DTC Detecting Condition

Item

Detecting Condition

Possible Cause

DTC Strategy

Voltage monitoring

Variable swirl valve motor circuit

Enable Conditions

Engine running

Threshold Value

Short to ground in motor output terminal

Open in motor circuit

Diagnostic Time

1000ms

Fail Safe

Fuel Cut

NO

Swirl valve opened at variable swirl control actuator failure

EGR Off

NO

Fuel Limit

NO

Check Lamp

NO

Specification
Diagnostic Circuit Diagram
Signal Waveform

Fig.1) Waveform when variable swirl valve closed at idle. Channel A is (+) and B is (-).

Fig.2) Waveform when variable swirl valve opened at above 3000RPM. Channel A is (-) and B is (+).