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 ...
Description and operation
Description
•
The Variable Charge Motion Actuator (VCMA) is installed on the inlet
of the intake manifold.
•
It ...
Other information:
Components and components location
Components and Components
Location
1. Trailing arm
2. Rear shock absorber
3. Rear suspension
4. Rear stabilizer bar
5. Rear upper arm
6. Rear assist arm
7. Rear lower arm
8. Rear axle assembly
...
Repair procedures
Removal
1.
Disconnect the (-) battery terminal.
2.
Remove the rear wheel and tire.
(Refer to Tires/Wheels - "Wheel")
3.
Loosen the bolt and nut (A) and then remove the rear lower arm from the ...
CVVT Oil Control Valve (OCV)
Variable Charge Motion Actuator (VCMA)