Mazda 6. Manual - part 19

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OUTLINE 

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A6E3940T904

OUTLINE, INTAKE-AIR SYSTEM 

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INTAKE-AIR SYSTEM OUTLINE

A6E391013000T01

•

The function, structure and operation of each part in the intake-air system of the Mazda6 (GG) L3, LF, and L8 
engine models are essentially carried over from the current 323 (BJ) FS engine models, except for the 
following:
— A non AAS type throttle body has been adopted to improved serviceability.
— A resin intake manifold has been adopted to reduce weight.
— The variable air duct (VAD) system has been adopted to improved the engine performance.
— Variable intake-air system (VIS) has been adopted. Same function as VICS of current 323 (BJ) FS engine 

models.

×

: Applied

–: Not applied

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31

Generator

32

Refrigerant pressure switch (middle)

33

PSP switch

34

Blower motor

35

Refrigerant pressure switch (high and low)

36

A/C switch

37

Brake switch

38

Brake light

39

Neutral switch

40

Clutch switch

41

TR switch

42

Input/turbine speed sensor

43

HOLD switch

44

TFT sensor

45

Oil pressure switch

46

VSS

47

Ignition coil

48

Generator

49

Purge solenoid valve

50

VAD control solenoid valve

51

EGR valve

52

Variable tumble control solenoid valve

53

VIS control solenoid valve

54

OCV

55

Valve body

56

L8, LF (Intensely hot area) and L3 engine models

57

MTX model

58

ATX model

59

L3 engine model

INTAKE-AIR SYSTEM

Item

Mazda6 (GG)

Current 323 

(BJ) FS

Remark for new model

 L3

LF

L8

Resonance chamber

×

Same function as current 323 (BJ) FS 
engine models 

Air cleaner

×

Same function as current 323 (BJ) FS 
engine models

Throttle body

×

Same function as current 323 (BJ) FS 
engine models
AAS has been eliminated due to 
automatic adjustment of idle speed

IAC valve

×

Same function as current 323 (BJ) FS 
engine models

Intake manifold

×

Same function as current 323 (BJ) FS 
engine models

Dynamic chamber

×

Same function as current 323 (BJ) FS 
engine models

VIS

×

–

×

Same function as VICS of current 323 
(BJ) FS engine models 

VTCS

×

–

Same function as current MX-5 (NB) 
BP engine models

VAD system

×

–

Newly adopted

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INTAKE-AIR SYSTEM 

INTAKE-AIR SYSTEM STRUCTURAL VIEW

A6E391013000T02

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VARIABLE AIR DUCT (VAD) SYSTEM OUTLINE (L3)

A6E391013000T03

Outline

•

The VAD control system opens the VAD shutter valve in the air cleaner only at high engine speeds not 
decrease at high engine speeds due to insufficient mass airflow amount.

Structure

•

The VAD system is composed of VAD shutter valve, VAD control solenoid valve, VAD vacuum chamber, VAD 
check valve (one-way).

A6E3910W036

1

Air cleaner

2

IAC  valve

3

Resonance chamber

4

VIS control solenoid valve (L3)

5

Variable tumble control solenoid valve

6

L8, LF engine models

7

Intake manifold

8

VIS shutter valve actuator (L3)

9

VTCS shutter valve actuator

10

VAD check valve (one-way) (L3)

11

Accelerator pedal (R.H.D.)

12

Accelerator cable (R.H.D.)

13

Accelerator pedal (L.H.D.)

14

Accelerator cable (L.H.D.)

15

VAD shutter valve (L3)

16

VAD control solenoid valve (L3)

INTAKE-AIR SYSTEM 

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VARIABLE AIR DUCT (VAD) SHUTTER VALVE DESCRIPTION (L3)

A6E391013000T04

Function

•

Opens and closes the shutter valves.

Structure

•

The VAD shutter valve actuator is composed of a rod, diaphragm chamber, and spring.

Operation

•

Normally, the rod is pushed by the force of the spring, opening the shutter valve. When intake manifold vacuum 
is applied to the diaphragm chamber, the rod is pulled, closing the shutter valve.

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A6E3910W029

1

VAD shutter valve

2

VAD control solenoid valve

3

VAD vacuum chamber

4

VAD check valve (one-way)

A6E3910W027

1

Shutter valve open

2

Shutter valve close

3

VAD shutter valve actuator

4

Rod

5

VAD shutter valve

6

Intake manifold vacuum