Other information:
Inspection
1.
Disconnect the negative (-) battery terminal.
2.
Remove the front door quadrant inner cover (A).
3.
Disconnect the power door mirror connector from the harness.
...
Description
Variable Intake manifold Solenoid (VIS) valve is installed on the intake manifold.
The 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). ...