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:

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- Description The evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator from freezing by excessive cooling. The evaporator temperature sensor has the Negative Temperature Coefficient (NTC). Electrical resistivity of NTC will increase with decreasing temperature and decrease with increasing temperature.

Hyundai Accent (HC) (2017 - 2022) Service Manual: Description and Operation

- Description MDPS (Motor Driven Power Steering) system uses an electric motor to assist the steering force and it is an engine operation independent steering system.MDPS control module controls the motor operation according to information received from the each sensor and CAN (Controller Area Network), resulting in a more precise and timely control of steering assist than conventional engine-driven hydraulic systems.

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