#
VARIABLE INTAKE-AIR SYSTEM (VIS)

id014000180900

## Outline

• The function of the VIS is the same as that of the current Mazda6 (GG, GY) L3 engine models, except for the following:

  - Output devices
  - Operation conditions

## Operation

### Operation conditions

  • When the engine speed is less than 4,100 rpm, the PCM activates the circuit on the close-side of the VIS shutter valve actuator and closes the VIS shutter valve, thus enhancing the inertia charging effect at low or middle engine speeds.
  • When the engine speed is 4,100 rpm or more, the PCM activates the circuit on the open-side of the VIS shutter valve actuator, and opens the VIS shutter valve, thus enhancing the inertia charging effect at high engine speeds.