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. ECU controlls VIS using RPM signal.
If there is Short circuit to GND in VIS circuit, ECM/PCM sets DTC P0661.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Power stage diagnosis | 1. Poor connection 2. Open or short in VIS circuit 3. Faulty VIS 4. Faulty ECM/PCM |
Enable Conditions |
•
- | |
Threshold Value |
•
Short circuit to GND | |
Diagnostic Time |
•
- | |
MIL ON Condition |
•
No MIL |
VIS | Specification(22 ℃) |
Resistance(Ω) | 30 ~ 35 |
