Mazda X-5. Manual — part 22
FUEL SYSTEM
01–14–1
01–14
01–14
FUEL SYSTEM
FUEL SYSTEM OUTLINE [LF] . . . . . . . . 01–14–1
Features . . . . . . . . . . . . . . . . . . . . . . . . 01–14–1
Specification. . . . . . . . . . . . . . . . . . . . . 01–14–1
FUEL SYSTEM STRUCTURAL VIEW
[LF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–14–2
Engine Compartment Side. . . . . . . . . . 01–14–2
Fuel Tank Side . . . . . . . . . . . . . . . . . . . 01–14–3
FUEL SYSTEM FLOW DIAGRAM
[LF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–14–3
Fuel Flow . . . . . . . . . . . . . . . . . . . . . . . 01–14–3
RETURNEES FUEL SYSTEM OUTLINE
[LF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–14–4
RETURNEES FUEL SYSTEM
OPERATION [LF] . . . . . . . . . . . . . . . . . 01–14–4
FUEL TANK CONSTRUCTION [LF] . . . . 01–14–4
NONRETURN VALVE FUNCTION
[LF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–14–4
NONRETURN VALVE
CONSTRUCTION/OPERATION
[LF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–14–4
FUEL PUMP UNIT FUNCTION [LF]. . . . . 01–14–5
FUEL PUMP UNIT
CONSTRUCTION/OPERATION
[LF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–14–5
Fuel Pump Unit . . . . . . . . . . . . . . . . . . . 01–14–5
Pressure Regulator . . . . . . . . . . . . . . . . 01–14–5
QUICK RELEASE CONNECTOR
(FUEL SYSTEM) FUNCTION [LF] . . . . . 01–14–6
QUICK RELEASE CONNECTOR
(FUEL SYSTEM)
CONSTRUCTION/OPERATION
[LF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–14–6
Type A . . . . . . . . . . . . . . . . . . . . . . . . . . 01–14–6
Type B . . . . . . . . . . . . . . . . . . . . . . . . . . 01–14–7
FUEL INJECTOR FUNCTION [LF] . . . . . 01–14–8
FUEL INJECTOR
CONSTRUCTION/OPERATION
[LF] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 01–14–8
FUEL PUMP RELAY FUNCTION [LF] . . . 01–14–8
End of Toc
FUEL SYSTEM OUTLINE [LF]
E5U011400000N01
Features
Specification
End Of Sie
Improved serviceability
• Nylon tubes adopted for fuel hoses in the engine compartment and around the fuel
tank, and quick release connectors adopted for joints
Reduction of evaporative gas
• Returnees fuel system adopted
Item
Specification
Injector
Type
Hi-ohmic
Type of fuel delivery
Top-feed
Type of drive
Voltage
Pressure regulator control pressure
(kPa {kgf/cm
2
, psi})
Approx. 390 {3.98, 56.6}
Fuel pump type
Electric
Fuel tank capacity
(L {US gal, lmp gal})
48 {12, 10}
Fuel type (Anti-knock index)
Premium unleaded fuel (96 RON or more)
FUEL SYSTEM
01–14–2
FUEL SYSTEM STRUCTURAL VIEW [LF]
E5U011400000N02
Engine Compartment Side
MAIN FUSE BLOCK
(UPPER BLOCK)
FUEL INJECTOR
QUICK RELEASE
CONNECTOR (TYPE A)
FUEL PUMP RELAY
CHECK CONNECTOR
E5U114ZS5020
FUEL SYSTEM
01–14–3
01–14
Fuel Tank Side
End Of Sie
FUEL SYSTEM FLOW DIAGRAM [LF]
E5U011400000N03
Fuel Flow
End Of Sie
QUICK RELEASE
CONNECTOR (TYPE B)
FUEL PUMP UNIT
FUEL TANK
NONRETURN VALVE
E5U114ZS5030
FUEL PUMP UNIT
: TO PCM
FUEL
INJECTOR
FUEL PUMP
FUEL FILTER
(LOW-PRESSURE)
PRESSURE
REGULATOR
FUEL TANK
FUEL FILTER
(HIGH-PRESSURE)
: FUEL FLOW
E5U114ZS5001
FUEL SYSTEM
01–14–4
RETURNEES FUEL SYSTEM OUTLINE [LF]
E5U011400000N04
• The returnees fuel system reduces fuel evaporation in the fuel tank.
• The pressure regulator located in the fuel tank prevents fuel return from the engine compartment side, thereby
maintaining a low fuel temperature in the fuel tank. Due to this, formation of evaporative gas produced by a rise
in fuel temperature is suppressed.
• The pressure regulator is built into the fuel pump unit in the fuel tank.
End Of Sie
RETURNEES FUEL SYSTEM OPERATION [LF]
E5U011400000N05
• Fuel in the fuel tank is pumped out through the fuel filter (low-pressure) by the fuel pump, filtered by the fuel
filter (high-pressure), and then regulated to a specified pressure by the pressure regulator.
• The pressure regulated fuel is sent to the fuel injectors.
• After pressure regulation, unnecessary fuel is returned from the pressure regulator to inside the fuel pump unit.
End Of Sie
FUEL TANK CONSTRUCTION [LF]
E5U011442110N01
• Capacity is 48 L {12 US gal, 10 lmp gal}.
• Two rollover valves and a fuel shut-off valve are built-in. For the rollover valve and the fuel shut-off valve, refer
to the emission system.
• Made of steel.
End Of Sie
NONRETURN VALVE FUNCTION [LF]
E5U011442270N01
• Prevents fuel from spouting out due to evaporative gas pressure in the fuel tank when removing the fuel-filler
cap.
End Of Sie
NONRETURN VALVE CONSTRUCTION/OPERATION [LF]
E5U011442270N02
• A single valve type has been adopted.
• The nonreturn valve is built into the fuel-filler pipe
of the fuel tank.
• The nonreturn valve cannot be removed because
it is integrated with the fuel tank. Replace the fuel
tank if the nonreturn valve requires replacement.
• Under normal conditions, this valve is closed as
shown by the dotted line. When refueling, it opens
to the position shown by the solid line due to the
flow of fuel. When refueling is finished, the valve
returns to the normal valve position due to spring
force.
End Of Sie
VALVE POSITION
DURING REFUELING
FUEL-FILLER PIPE OF
FUEL TANK
FUEL
FUEL TANK SIDE
NORMAL VALVE POSITION
E5U114ZS5021
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