Kia Optima: Engine Control System / Variable Intake Solenoid (VIS) Valve
Specifications
Item
|
Specification
|
Coil resistance (Ω)
|
30.0 - 35.0 [22°C (71.6°F)]
|
Description and operation
| • |
The Variable Intake Solenoid (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
|
Components and components location
1. Variable Intake Solenoid (VIS)
Valve
|
|
Schematic diagrams
Harness Connector
Repair procedures
| 1. |
The engine control system can be more quickly diagnosed for troubles
by using the vehicle diagnostic system (KDS). (Refer to "DTC guide")
KDS provides the following information.
| (1) |
Self diagnosis : Inspects and displays diagnostic trouble code
(DTC)
|
| (2) |
Sensor data : Checks the system input/output value status
|
| (3) |
Forced operation : Checks the system operating status
|
| (4) |
Additional function : Controls system options, zero point adjustment
and other functions
|
|
| 1. |
Turn the ignition switch OFF.
|
| 2. |
Disconnect the VIS valve connector.
|
| 3. |
Measure resistance between VIS valve terminals 1 and 2.
|
Specification : 30.0 - 35.0 [22°C (71.6°F)]
|
|
| 1. |
Disconnect the negative battery terminal.
|
| 2. |
Disconnect the variable intake solenoid valve connector (A) and vacuum
hose (B).
|
| 3. |
Remove the VIS valve after loosening the mounting bolts (A).
|
Tightening torque :
9.8 - 11.8 N·m (1.0 - 1.2 kgf·m, 7.2 - 8.7 lb·ft)
|
|
| 4. |
Remove the VIS valve (A) after loosening the rod.
|
| • |
Install the component to the specified torque.
|
| • |
Note that internal damage may occur when the component is dropped.
If the component has been dropped, inspect before installing.
|
| • |
Be careful of foreign material not to flow into the valve.
|
|
| 1. |
Install in the reverse order of removal.
|
Specifications
Specification
Item
Specification
Coil Resistance (Ω)
9.4 - 10.4 [20°C(68°F)]
Description and operat ...
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•
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•
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