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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A6E3910W026
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
A6E3910W035
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
.
A6E3912W048
A6E3912W049
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
A6E3912W024
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