3.
Measure resistance between VIS Valve #1,2 terminals 1 and 2.
Variable Intake manifold Solenoid (VIS) valves are installed on surge tank (VIS Valve #1) and intake manifold (VIS Valve #2). These VIS valve #1 and #2 control vacuum modulators which activate valves in surge tank and intake manifold. The PCM opens or closes these valves according to engine condition (Refer to below table).
Engine Condition | VIS Valve #1 (Surge Tank) | VIS Valve #2 (In-manifold) | Operation |
Low Speed | Closed | Closed | Increasing engine performance in low engine speed by reducing intake interference among cylinders |
Medium Speed | Open | Open or closed | Increasing intake efficiency |
High Speed | Open | Open | Minimizing intake resistance by shortening intake manifold length and increasing area of air entrance |
Item | Specification |
Coil Resistance (Ω) | 29.0 ~ 35.0 Ω at 20℃ (68℉) |
Turn ignition switch OFF.
Disconnect VIS Valve connector.
Measure resistance between VIS Valve #1,2 terminals 1 and 2.
Check that the resistance is within the specification.
Specification: Refer to SPECIFICATION.
