Hyundai Accent (HC): Engine Control System / Variable Intake Solenoid (VIS) Valve

Hyundai Accent (HC) (2017 - 2022) Service Manual / Engine Control / Fuel System / Engine Control System / Variable Intake Solenoid (VIS) Valve

- 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 conditionVIS valveOperation
Medium speedClosedIncreasing engine performance in low engine speed by reducing intake interference among cylinders
Low / High speedOpenMinimizing intake resistance by shortening intake manifold length and increasing area of air entrance

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

- Circuit Diagram [M/T]

Harness Connector

[A/T]

Harness Connector

- 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.Turn the ignition switch OFF and disconnect the battery negative (-) cable.

2.Disconnect the VIS valve connector (A).

3.Disconnect the vacuum hoses (B) from the valve.

4.Remove the installation bolts, and then remove the VIS valve (A) from the surge tank.

Variable intake solenoid valve installtion bolt :9.8 ~ 11.8 N.m (1.0 ~ 1.2 kgf.m, 7.2 ~ 8.7 lb-ft)

- 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.Install in the reverse order of removal.

Variable Force Solenoid (VFS)

Electric EGR Control Valve

Other information:

Hyundai Accent (HC) (2017 - 2022) Service Manual: Timing Chain Cover

- Removal     • Use fender covers to avoid damaging painted surfaces. • To avoid damage, unplug the wiring connectors carefully while holding the connector portion.     • Mark all wiring and hoses to avoid misconnection. 1.Disconnect the battery negative terminal. 2.Remove the engine cover.(Refer to Engine and Transaxle Assembly - "Engine Cover") 3.

Hyundai Accent (HC) (2017 - 2022) Service Manual: Injector

- Description A DPI (Dual Point Injection) system means a system with two injectors in one cylinder (intake port) and has a total of eight injectors.The injector is an electronically controlled fuel injector, a solenoid valve that supplies precisely calculated fuel to the engine in spray form for the optimal combustion. This helps satisfy various engine operating conditions.

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