Kia Sportage: Engine Control System / Variable Intake Solenoid (VIS) Valve Description and operation
Variable Intake manifold Solenoid (VIS) valve is installed on the intake manifold.
The VIS valve controls the vacuum modulator which activates a valve in the intake
manifold. The ECM opens or closes this valve according to engine condition (Refer
to below table).

Engine condition
|
VIS valve
|
Operation
|
Medium speed
|
OFF
|
Increasing engine performance in low engine speed by reducing intake interference
among cylinders
|
Low / High speed
|
ON
|
Minimizing intake resistance by shortening intake manifold length and increasing
area of air entrance
|

Components
1. Variable Intake Solenoid (VIS)
Valve
2. Variable Intake Solenoid (VIS) Actuator
3. Variable Intake Solenoid (VIS)
Flap
4. Vacuum Hose ...
Circuit Diagram
Harnness Connector
...
Other information:
Generally, if you have a trailer attached to your vehicle, you should not park
your vehicle on a hill. People can be seriously or fatally injured, and both your
vehicle and the trailer can be damaged if they unexpectedly roll downhill.
However, if you ever have to park your trailer on a hill, h ...
Inspection
•
Wrap tin foil around the end of the voltmeter test lead to prevent
damaging the heater line. Apply pressure on the tin foil with
hand and move the tin foil al ...