Kia Optima DL3 Quiz
Engine Control System/Fuel System

Variable Intake Solenoid (VIS)

In this manual: Engine Control System/Fuel System
General Information — 8Advanced Driver Assistance System (ADAS) — 21Maintenance — 27Engine Mechanical System — 45Engine Electrical System — 11Emission Control System — 11Engine Control System/Fuel System — 25Automatic Transmission — 20Drive Shaft and Axle — 7Suspension System — 22Steering — 7Restraints — 11Brake System — 22Body (Interior and Exterior) — 116Body Electrical System — 90Heating, Ventilation, and Air Conditioning — 32
7steps
~42min
2/5difficulty
0102030405011.89N·mlb·ft
Tightening torque found on this page
Done 0 of 7

Specifications

Specification

Item Specification
Coil Resistance (Ω) 30,0–35,0 [22 °C]

Description and Operation

Description

  • The Variable Intake Solenoid Valve (VIS) controls the vacuum modulator, which actuates the valve in the intake manifold.

  • The ECM opens or closes this valve depending on engine conditions (refer to the table below).

Engine Status VIS Valve Operation
Average Speed Closed Improves engine performance at low engine speeds by reducing intake interference between cylinders.
Low/High Speed Open Minimizes intake resistance by shortening the intake manifold length and increasing the air inlet area.

Components and Component Location

Component Location

1. Variable Induction Solenoid (VIS) Valve

Circuit Diagrams

Wiring Diagram

Harness Connector

Repair Procedures

Inspection

  1. The engine control system can be diagnosed more quickly for malfunctions using the Kia Diagnostic System (KDS). (Refer to Diagnostic Trouble Code Guide)

    KDS provides the following information.

    1. Self-diagnosis: Checks and displays diagnostic trouble codes (DTC).

    2. Data list: Checks the input/output values of the system.

    3. Active test: Checks the operating condition of the system.

    4. Additional functions: System option control, zero point adjustment, and other functions.

Component Inspection

  1. Turn the ignition off.

  2. Disconnect the VIS valve connector.

  3. Measure the resistance between terminals 1 and 2 of the VIS valve.

    Specification: 30.0–35.0 [22 °C]

Removal

  1. Disconnect the negative battery cable.

  2. Disconnect the variable induction solenoid valve connector (A) and the vacuum hose (B).

  3. Remove the VIS valve by loosening the mounting bolts (A).

    Tightening Torque: 9.8–11.8 N·m

  4. Remove the VIS valve (A) after loosening the rod.

Installation

  1. Install in the reverse order of removal.

Test yourself

A quick Kia Optima DL3 quiz: every answer comes with an explanation and a link to the manual page.