Mazda 6. Manual - part 20

F–16

INTAKE-AIR SYSTEM 

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

A6E391013000T05

Function

•

Switches the intake manifold vacuum passage between the intake manifold and the actuator.

Structure

•

Composed of a solenoid coil, spring, plunger, and filter.

Operation
Energized

•

The plunger is pulled back to open the air passage between the A and B ports, which applies the atmosphere 
to the VAD shutter valve actuator.

De-energized

•

The plunger is returned forward to open the air passage between the B and C ports, which applies the intake 
manifold vacuum VAD shutter valve actuator.

.

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VARIABLE AIR DUCT (VAD) CHECK VALVE (ONE-WAY) DESCRIPTION (L3)

A6E391013000T06

Function

•

The VAD check valve (one-way) maintain the vacuum in the VAD vacuum chamber.

Structure

•

The VAD check valve (one-way) is composed of a valve.

Operation

•

The VAD check valve (one-way) allows air flow only from VAD vacuum chamber to intake manifold.

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1

Energized

2

De-energized

3

Port A (to atmosphere)

4

Port B (to actuator)

5

Port C (to intake manifold)

6

Coil

7

Plunger

8

Spring

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1

Check valve

2

Green

3

White

4

Intake manifold

5

VAD vacuum chamber

FUEL SYSTEM 

F–17

F

FUEL SYSTEM OUTLINE

A6E391201006T01

•

The function, structure and operation of each part in the fuel system of the Mazda6 (GG) L3 engine model are 
the same as those of the 323 (BJ) FS engine models except for the following:
— Mechanical returnless fuel system has been adopted.

×

 : Applied

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FUEL SYSTEM

Item

Mazda6 (GG)

 323 (BJ) FS

Remark for new model

L3

LF

L8

Fuel tank

×

Same as current 323 (BJ) FS 
engine models

Fuel pump unit 
(Built-in fuel filter
(high-and low-pressure))

×

New part adopted

Quick release connector 
(fuel distributor side)

×

Same as current 323 (BJ) FS 
engine models
(fuel distributor side)

Quick release connector 
(fuel tank side)

×

Quick release connector
(engine room side)

×

Pulsation dumper

×

Same as current 323 (BJ) FS 
engine models

Pressure regulator

×

Integrated pressure regulator with 
the fuel pump unit

Fuel injector

×

Same as current 323 (BJ) FS 
engine models

Nonreturn valve

×

Same as current 323 (BJ) FS 
engine models

F–18

FUEL SYSTEM 

FUEL SYSTEM STRUCTURAL VEW

A6E391201006T02

Engine Room Side

Fuel tank side

.

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FUEL SYSTEM 

F–19

F

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FUEL PUMP UNIT DESCRIPTION

A6E391213350T01

Note

•

It is normal to hear the fuel pump operating when the ignition switch is turned to the ON position.

Function

•

Due to the adoption of the mechanical returnless fuel system.

•

The fuel pump unit, except for the fuel gauge sender unit, is integrated for confidentiality protection.

•

To prevent decreased engine output from a lack of fuel supply when the vehicle is turning, the fuel pump has 
been designed so the fuel supply always remains constant in the fuel reservoir cup.

•

Fuel stored in the fuel reservoir cup is supplied from two lines: the check valve (one-way) and the jet pump.

Structure

1

Fuel tank

2

Nonreturn valve

3

Fuel pump unit

4

Fuel injector

5

Pulsation damper

6

Fuel pump relay

7

Check connector

8

Quick release connector

9

Fuel  filler  cap

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