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.
PCM sets P0661 when detects electrical error in circuit. (Short to ground / Open circuit)
Item
Detecting Condition
Possible Cause
DTC Strategy
Electrical Check
Open or Short to Ground in Control circuit
Open or Short to Ground in Power circuit
Poor connection or damaged harness
Faulty VIS Sol. Valve
Enable Conditions
6V < Battery voltage < 16V
Engine running
Threshold Value
Short to ground
Open circuit
Diagnostic Time
3 sec.
MIL On Condition
2 Drive Cycles
Temp.
VIS Sol. Valve resist
22? (72?)
30 ~ 35O