VIS(Variable intake system) is a device which varies the length of intake manifold to genetate maximum power at certain RPM. VIS lengthens intake manifold to improve the torque at low RPM when vehicle speed is low while it shortens intake manifold to raise torque at high RPM when vehicle speed is high. PCU controlls VIS using RPM signal.
If there is Open in VIV circuit, ECM sets DTC P0660.
Item
Detecting Condition
Possible cause
DTC Strategy
Power stage diagnosis
Poor connection
Open or short in VIV circuit
Faulty VIV
Faulty ECM
Enable Conditions
-
Threshold value
Open
Diagnosis Time
MIL On Condition
No MIL
VIV
Specification(22 ?)
Resistance(?)
30 ~ 35