Hyundai Elantra: Engine Control System / Variable Intake Solenoid (VIS) Valve Description and Operation

Hyundai Elantra AD (2016-2020) Service Manual / Engine Control/Fuel System / Engine Control System / Variable Intake Solenoid (VIS) Valve 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

CVVT Oil Control Valve (OCV) Repair procedures

Inspection 1. Turn the ignition switch OFF. 2. Disconnect the OCV connector. 3. Measure resistance between the OCV terminals 1 and 2. 4. Check that the resistance is within the specifi ...

Variable Intake Solenoid (VIS) Valve Specifications

Specification ItemSpecificationCoil resistance (?)30.0 ~ 35.0 [20°C(68°F)] ...

Other information:

Hyundai Elantra AD (2016-2020) Owners Manual: System Setting and Activation
System setting • Setting Forward Safety function The driver can activate the FCA by placing the ignition switch to the ON position and by selecting: 'User Settings → Driver Assistance → Forward Safety' - If you select "Active Assist", the FCA system activates. The FCA ...

Hyundai Elantra AD (2016-2020) Service Manual: Manifold Absolute Pressure Sensor (MAPS) Repair procedures
Inspection 1. Connect the GDS on the Data Link Connector (DLC). 2. Measure the output voltage of the MAPS at idle and IG ON. ConditionOutput Voltage (V)IG ON3.9 ~ 4.1Idle0.8 ~ 1.6 Removal 1. Turn the ignition switch OFF and disconnect the battery negative (-) cable. 2. Disco ...