Kia Rio: Engine Control System / Variable Intake Solenoid (VIS) Valve

Kia Rio 2017-2021 YB Service Manual / Engine Control / Fuel System / Engine Control System / Variable Intake Solenoid (VIS) Valve

Specifications
Specification

Item
Specification
Coil resistance (Ω)
30.0 ~ 35.0 [20°C(68°F)]

Description and operation
Description

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
Closed
Increasing engine performance in low engine speed by reducing intake interference among cylinders
Low / High speed
Open
Minimizing intake resistance by shortening intake manifold length and increasing area of air entrance

Schematic diagrams
Circuit Diagram

Repair procedures
Inspection
1.

Turn the ignition switch OFF.

2.

Disconnect the VIS valve connector.

3.

Measure resistance between VIS valve terminals 1 and 2.

Specification : Refer to "Specification"

Removal
1.

Switch "OFF" the ignition and disconnect the negative (-) battery terminal.

2.

Remove the air cleaner assembly.

(Refer to Engine Mechanical System - "Air Cleaner")

3.

Remove the electronic throttle body control (ETC) module.

(Refer to Engine Control System - "ETC (Electronic throttle body control) System")

4.

Disconnect the variable intake solenoid valve connector (A).

5.

Remove the variable intake solenoid valve (A).

6.

Disconnect the vacuum hoses (B) from the valve.

7.

Remove the variable intake solenoid valve.

Installation
  

Install the component with the specified torques.

Note that internal damage may occur when the component is dropped. In this case, use it after inspecting.

Be careful of foreign material not to flow into the valve.

1.

Installation is reverse of removal.

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