Fuel pump pressure SUZUKI SWIFT 2006 2.G Service Owner's Manual

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Camshaft Position Control (VVT Variable Valve Timing) System DescriptionS7RS0B1401002
System Description
The VVT system is an electronic control system which continuously vary and optimize the intake valve timing in
response to the engine operating condition.
The optimized intake valve timing produce such an air intake with high efficiency that both the higher power generation
and lower fuel consumption can be attained in the whole engine speed range from low to high. In the area of the
average engine load, low emission of nitrogen oxides (NOx) and high fuel efficiency can also be attained by making
the valve opening overlap between the intake and exhaust valves longer.
For the brief of the system operation, the intake valve timing is varied by the cam timing sprocket (1) which varies the
rotational phase between the intake camshaft (3) and sprocket . The rotor (2) in the cam timing sprocket is actuated by
switching or adjusting the hydraulic pressure applied to the chambers for the timing advancing (7) and/or retarding (6).
To switch or adjust the hydraulic pressure appropriately, ECM operates the oil control valve (12) with detecting the
engine speed, intake air value, throttle opening, engine coolant temperature and camshaft position (angle).
1
4
5
13
10
89
2
7
6
12
11
3
14
60 (variable angle)
Most retarded timing
Most advanced timing
Exhaust valve Intake valve
Crank angle
Overlap of valves
Valve lift
I3RH0B140002-01
4. Oil passage to chamber for timing retarding 8. Oil filter10. Oil pan 13. Oil return
5. Oil passage to chamber for timing advancing 9. Oil pump11. Control signal from ECM 14. Oil flow

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Targeted Timing Varying Operation
Diagnostic Information and Procedures
Compression CheckS7RS0B1404001
Check compression pressure on all 4 cylinders as
follows:
1) Warm up engine to normal operating temperature.
2) Stop engine after warming up.
NOTE
After warming up engine, place transaxle
gear shift lever in “Neutral”, and set parking
brake and block drive wheels.

3) Disconnect negative cable at battery.
4) Remove engine cover.
5) Remove air cleaner assembly and air suction hose referring to “Air Cleaner Components”.
6) Remove cylinder head upper cover.
7) Disconnect ignition coil couplers (1).
8) Remove ignition coil assemblies (2) with high- tension cord (3).
9) Remove all spark plugs.
10) Disconnect fuel injector wires (4) at the coupler. Driving condition Valve timing Target of control Effect
Engine running at idle
speed Most retardedTo shorten the valve opening overlap in
order to prevent the exhaust gas
counterflow to in
take manifold. Stabilization of the engine
rotation at idle speed.
Average engine load
range To the advanced
sideTo lengthen the valve opening overlap
in order to enhance the internal
exhaust gas recirculation and reduce
the pumping loss. Improvement of the fuel
efficiency.
Lowering of the exhaust
emission.
Light engine load
range To the retarded sideTo shorten the valve opening overlap in
order to prevent the exhaust gas
counterflow to in
take manifold. Keeping of the engine stability.
Low or average
engine speed range
with heavy engine
load To the advanced
side
To advance the closing timing of the
intake valve in order to improve the
volumetric efficiency. Improvement of generating the
engine torque at low and
average engine speed.
High engine speed
range with heavy
engine load To the retarded sideTo retard the closing timing of the
intake valve in order to improve the
volumetric efficiency. Improvement of generating the
engine power.
Low engine coolant
temperature Most retardedTo shorten the valve opening overlap in
order to prevent the exhaust gas
counterflow to intake manifold and
reduce the fuel increasing.
To slow the fast idle speed of the
engine as a result of stabilizing the
engine idling. Stabilization of the fast idling of
the engine.
Improvement of the fuel
efficiency.
At engine starting and
stopping Most retardedTo shorten the valve opening overlap in
order to prevent the exhaust gas
counterflow to in
take manifold. Improvement of start ability.I2RH0B140003-01

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Engine
Fuel System
Precautions
Precautions on Fuel System ServiceS7RS0B1700001
WARNING!
Before attempting service of any type on fuel system, the following should be always observed in
order to reduce the risk of fire and personal injury.
• Disconnect negative cable at battery.
• Do not smoke, and place no smoking signs near work area.
• Be sure to have CO
2 fire extinguisher handy.
• Be sure to perform work in a well-ventilated area and away from any open flames (such as gas hot heater).
• Wear safety glasses.
• To relieve fuel vapor pressure in fuel tank, remove fuel filler cap from fuel filler neck and then
reinstall it.
• As fuel feed line is still under high fuel pr essure even after stopping engine, loosening or
disconnecting fuel feed line directly may cause dangerous spout of fuel. Before loosening or
disconnecting fuel feed line, make sure to relieve fuel pressure referring to “Fuel Pressure Relief
Procedure”.
• A small amount of fuel may be released when the fuel line is disconnected. In order to reduce the risk of personal injury, cover a shop cloth to the fitting to be disconnected. Be sure to put that cloth
in an approved container after disconnecting.
• Never run engine with fuel pump relay disconnected when engine and exhaust system are hot.
• Note that fuel hose connection varies with each type of pipe. Be sure to connect and clamp each hose correctly referring to “Fuel Hose Disconnecting and Reconnecting”.
After connecting, make sure that it has no twist or kink.
• When installing inje ctor or fuel feed pipe, lubr icate its O-ring with gasoline.

General Description
Fuel System DescriptionS7RS0B1701001
CAUTION!
This engine requires the unleaded fuel only.
The leaded and/or low lead fuel can result in
engine damage and reduce the effectiveness
of the emission control system.

The main components of the fuel system are fuel tank,
fuel pump assembly (with fuel filter, fuel level gauge, fuel
pressure regulator, fuel feed line and fuel vapor line.
For the details of fuel flow, refer to “Fuel Delivery System
Diagram”.
Fuel Delivery System DescriptionS7RS0B1701002
The fuel delivery system consists of the fuel tank, fuel
pump assembly (with built-in f uel filter and fuel pressure
regulator), delivery pipe, injectors and fuel feed line.
The fuel in the fuel tank is pumped up by the fuel pump,
sent into delivery pipe and injected by the injectors.
As the fuel pump assembly is equipped with built-in fuel
filter and fuel pressure regulator, the fuel is filtered and
its pressure is regulated before being sent to the feed
pipe.
The excess fuel at fuel pressure regulation process is
returned back into the fuel tank.
Also, fuel vapor generated in fuel tank is led through the
fuel vapor line into the EVAP canister.
For system diagram, refer to “Fuel Delivery System
Diagram”.

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Fuel Pump DescriptionS7RS0B1701003
The fuel pump (1) is an in-tank type electric pump.
Incorporated in the pump assembly are;
a fuel filter (2) and a fuel pressure regulator (3) are
included and a fuel level gauge (4) is attached.
Addition of the fuel pressure regulator to the fuel pump
makes it possible to mainta in the fuel pressure at
constant level and ECM controls compensation for
variation in the intake manifold pressure.
Schematic and Routing Diagram
Fuel Delivery System DiagramS7RS0B1702001
Diagnostic Information and Procedures
Fuel Pressure InspectionS7RS0B1704001
WARNING!
Before starting the following procedure, be
sure to observe “Precautions on Fuel System
Service” in order to reduce the risk or fire
and personal injury.

1) Relieve fuel pressure in fuel feed line referring to
“Fuel Pressure Relief Procedure”.
2) Disconnect fuel feed hose from fuel delivery pipe.
3) Connect special tools and hose between fuel feed hose (1) and fuel delivery pipe as shown in figure,
and clamp hoses securely in order to ensure that no
leaks occur during checking.
Special tool
(A): 09912–58442
(B): 09912–58432
(C): 09912–58490
1
3
2
4
I6RS0C170001-01
4
6 7
8
12
2 3
11
10
5
1
9
I6RS0C170002-01
1. Fuel tank
5. Fuel injector9. EVAP canister
2. Fuel pump 6. Fuel feed line10. Fuel filter
3. Fuel pressure regulator 7. Fuel vapor line 11. Main fuel level sensor
4. Delivery pipe 8. Intake manifold12. EVAP canister purge valve
1
(C) (B)
(A)
I3RM0A170004-01

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4) Check that battery voltage is 11 V or more.
5) Measure fuel pressure at each condition.If measured pressure is out of specification, refer to
“Fuel Pressure Check in Section 1A” and check each
possibly defective part. Replace if found defective.
a) Turn ignition switch ON to operate fuel pump and after 2 seconds turn it OFF. Repeat this 3 or 4
times and then check fuel pressure.
Fuel pressure specification
With fuel pump operating and engine
stopped: 270 – 310 kPa (2.7 – 3.1 kg/cm2, 38.4
– 44.0 psi)
b) Start engine and warm it up to normal operating temperature, and measure fuel pressure at
idling.
Fuel pressure specification
At specified idle speed: 270 – 310 kPa (2.7 –
3.1 kg/cm2, 38.4 – 44.0 psi)
c) Stop engine, and measure fuel pressure at one minute after stopping.
Fuel pressure specification
With 1 min. after engine (fuel pump) stop
(Pressure reduces as time passes): Over 300
kPa (3.0 kg/cm
2, 42.7 psi)
6) After checking fuel pressure, remove fuel pressure gauge.
WARNING!
As fuel feed line is still under high fuel
pressure, make sure to release fuel pressure
according to the following procedures.
• Place fuel container under joint.
• Cover joint with rag and loosen joint nut slowly in order to release fuel pressure
gradually.

7) Remove special tools from fuel delivery pipe and fuel feed hose.
8) Connect fuel feed hose to fuel delivery pipe and clamp it securely.
9) With engine OFF and ignition switch ON, check for fuel leaks.
Fuel Cut Operation InspectionS7RS0B1704002
NOTE
Before inspection, make sure that gear shift
lever is in neutral positi on (shift select lever
is “P” range for A/T vehicle), A/C is OFF and
parking brake lever is pulled all the way up.

1) Warm engine up to normal operating temperature.
2) While listening to sound of injector (2) by using sound scope (1) or such, increase engine speed to
higher than 3,000 r/min.
3) Check to make sure that injector operation sound is stop when throttle valve is closed instantly and it is
heard again when engine speed is reduced to
approx. 2,000 r/min or less.
I2RH01170032-01
I2RH0B170004-01

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Fuel Pressure Relief ProcedureS7RS0B1706003
CAUTION!
This work must not be done when engine is
hot. If done so, it may cause adverse effect to
catalyst.

NOTE
If ECM detects DTC(s) after servicing, clear
DTC(s) referring to “DTC Clearance in
Section 1A”.

1) Make sure that engine is cold.
2) Shift transaxle gear shift lever in “Neutral” (shift select lever in “P” range for A/T model), set parking
brake and block drive wheels.
3) Remove relay / fuse box cover.
4) Disconnect fuel pump relay (1) from relay / fuse box (2).
5) Remove fuel filter cap in order to release fuel vapor pressure in fuel tank, and then reinstall it.
6) Start engine and run it until engine stops for lack of fuel. Repeat cranking engine 2 – 3 times for about 3
seconds each time in order to dissipate fuel pressure
in lines. Fuel connections are now safe for servicing.
7) After servicing, connect fuel pump relay (1) to relay / fuse box and install re lay / fuse box cover.
Fuel Leakage Check ProcedureS7RS0B1706004
After performing any service on fuel system, check to
make sure that there are no fuel leakages as follows.
1) Turn ON ignition switch for 3 seconds (to operate fuel pump) and then turn it OFF.
Repeat this (ON and OFF) 3 or 4 times and apply
fuel pressure to fuel line until fuel pressure is felt by
hand placed on fuel feed hose.
2) In this state, check to see that there are no fuel leakages from any part of fuel system.
Fuel Lines On-Vehicle InspectionS7RS0B1706005
CAUTION!
Due to the fact that fuel feed line (1) is under
high pressure, use special care when
servicing it.

Visually inspect fuel lines for evidence of fuel leakage,
hose crack and deterioration or damage.
Make sure all cl amps are secure.
Replace parts as needed.
Fuel Pipe Removal and InstallationS7RS0B1706006
WARNING!
Before starting the following procedure, be
sure to observe “Precautions on Fuel System
Service” in order to reduce the risk or fire
and personal injury.

Removal
1) Relieve fuel pressure in fuel feed line according to “Fuel Pressure Relief Procedure”.
2) Disconnect negative cable at battery.
3) Disconnect fuel pipe joint and fuel hose (3) from fuel pipe (2) at the front and rear of each fuel pipe
referring to “Fuel Hose Disconnecting and
Reconnecting”.
4) Mark the location of clamps (1) on fuel pipes (2), so that the clamps can be reinstalled to where they
were.
5) Remove pipes (2) with clamp (1) from vehicle.
6) Remove clamp (1) from pipes (2).
1
I4RS0A170004-01
1
I4RS0A170005-01
2
13
I4RS0A170020-01

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4) Install suitable vinyl tube onto injector nozzle to
prevent fuel from splashing out when injecting.
5) Put graduated cylinder under injector.
6) Operate fuel pump and apply fuel pressure to
injector as follows:
a) When using scan tool:
i) Connect scan tool to DLC with ignition switch OFF.
ii) Turn ignition switch ON, clear DTC and select “MISC TEST” mode on scan tool.
iii) Turn fuel pump ON by using scan tool.
Special tool
(A): SUZUKI scan tool
b) When not using scan tool: i) Remove fuel pump relay from connector.
ii) Connect two terminals of relay connector using service wire (1) as shown in figure.
CAUTION!
Check to make sure that connection is made
between correct terminals. Wrong
connection can cause damage to ECM, wire
harness, etc.

iii) Turn ignition switch ON. 7) Apply battery voltage to in
jector (1) for 15 seconds
and measure injected fuel volume with graduated
cylinder. Test each injector two or three times. If not
within specification, replace injector.
Injected fuel volume
43 – 47 cc/15 sec. (1.45/1.51 – 1.58/1.65 US/lmp
oz/15 sec.)
8) Check fuel leakage from injector nozzle. Do not operate injector for this check (but fuel pump should
be at work). If fuel leaks (1) more than the following
specifications, replace.
Fuel leakage
Less than 1 drop/min.
Fuel Filler Cap InspectionS7RS0B1706010
WARNING!
Before starting the following procedure, be
sure to observe “Precautions on Fuel System
Service” in order to reduce the risk or fire
and personal injury.

Remove cap (1), and che ck gasket for even filler neck
imprint, and deterioration or any damage. If gasket (2) is
in malcondition, replace cap.
NOTE
If cap requires replacement, only a cap with
the same features should be used. Failure to
use correct cap can result in fire and
personal injury.

(A)I4RS0A170021-01
1
I4RS0A170006-02
I2RH0B170013-01
I2RH01170008-01

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Fuel Tank Inlet Valve InspectionS7RS0B1706012
WARNING!
Before starting the following procedure, be
sure to observe “Precautions on Fuel System
Service” in order to reduce the risk or fire
and personal injury.

Check fuel tank inlet valve for the following.
If any damage or malfunction is found, replace.
•Damage
• Smooth opening and closing
Fuel Tank Removal and InstallationS7RS0B1706013
WARNING!
Before starting the following procedure, be
sure to observe “Precautions on Fuel System
Service” in order to reduce the risk or fire
and personal injury.

Removal1) Relieve fuel pressure in fuel feed line according to
“Fuel Pressure Relief Procedure”.
2) Disconnect negative cable at battery.
3) Hoist vehicle.
4) Remove exhaust center pipe.
5) Disconnect fuel filler hose and breather hose from
filler neck referring to “Fue l Tank Inlet Valve Removal
and Installation”.
6) Due to absence of fuel tank drain plug, drain fuel tank by pumping fuel out through fuel tank filler.
Use hand operated pump device to drain fuel tank.
CAUTION!
• Do not force pump hose into fuel tank, or pump hose may damage fuel tank inlet
valve.
• Never store fuel in an open container due to possibility of fire or explosion.

7) Disconnect fuel pipe joint and fuel hoses (1) from fuel pipes (2) referring to “Fuel Hose Disconnecting
and Reconnecting”.
8) Support fuel tank (1) with jack (2) and remove its mounting bolts.
9) Lower fuel tank a little as to disconnect wire harness at connector (1) and ground wire (2), then remove
fuel tank.
I2RH0B170019-01
12
I4RS0A170008-01
12
I4RS0A170009-01
1
2
I6RS0C170005-02

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Fuel Tank Purging ProcedureS7RS0B1706015
WARNING!
• Before starting the following procedure, be sure to observe “Precautions on Fuel
System Service” in order to reduce the risk
or fire and personal injury.
• This purging procedure will not remove all fuel vapor.
Do not attempt any repair on tank using
heat of flame as an explosion resulting in
personal injury could occur.

CAUTION!
Never remain water in fu el tank after washing,
or fuel tank inside will get corrosion.

The following procedure are used for purging fuel tank.
1) After removing fuel tank, remove all hoses, pipes and fuel pump assembly from fuel tank.
2) Drain all remaining fuel from tank.
3) Place fuel tank to flushing area.
4) Fill tank with warm water or tap water, and agitate
vigorously and drain. Repeat this washing until
inside of tank is clean. Replace tank if its inside is
rusty.
5) Completely flush out rema ining water after washing.
Fuel Pump On-Vehicle InspectionS7RS0B1706016
WARNING!
Before starting the following procedure, be
sure to observe “Precautions on Fuel System
Service” in order to reduce the risk or fire
and personal injury.

NOTE
The fuel pressure regulator is incorporated
with the fuel pump assembly so individual
inspection of it is impossible.

1) Remove filler cap and turn ON ignition switch (2).
Then fuel pump operating sound should be heard
from fuel filler (1) for about 2 seconds and stop. Be
sure to reinstall fuel filler cap after checking.
If the check result is not satisfactory, go to “Fuel
Pump and Its Circuit Check in Section 1A”. 2) Turn OFF ignition switch and leave over 10 minutes
as it is.
3) Fuel pressure should be felt at fuel feed hose (1) for about 2 seconds after ignition switch ON.
If fuel pressure is not felt, go to “Fuel Pressure
Check in Section 1A”.
Fuel Pump Assembly Removal and InstallationS7RS0B1706017
WARNING!
Before starting the following procedure, be
sure to observe “Precautions on Fuel System
Service” in order to reduce the risk or fire
and personal injury.

Removal
1) Remove fuel tank from vehicle. Refer to “Fuel Tank Removal and Installation”.
2) Disconnect fuel feed pipe (1) from fuel pump assembly (2) referring to “Fuel Hose Disconnecting
and Reconnecting”.
IVSY01170013-01
1I3RM0A170019-01
1
2
I6RS0C170008-02

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Removal1) Remove fuel pump assembly from fuel tank referring to “Fuel Pump Assembly Removal and Installation”.
2) Disconnect main fuel level sensor connector (3).
3) With pressing snap-fit part (2), remove main fuel level sensor (1) by sliding it in the arrow direction as
shown in figure.
Installation
Reverse removal procedure for installation.Fuel Pump InspectionS7RS0B1706019
• Check fuel pump assembly for damage.
• Check fuel suction filter for evidence of dirt and contamination. If present, replace or clean and check
for presence of dirt in fuel tank.
• For electrical circuit, refer to “Fuel Pressure Check in Section 1A”.
• For inspection of main fuel level sensor (1), refer to “Fuel Level Sensor Inspection in Section 9C”.
Specifications
Tightening Torque SpecificationsS7RS0B1707001
NOTE
The specified tightening torque is also described in the following.
“Fuel System Components”
“Fuel Hose Disconnecting and Reconnecting”

Reference:
For the tightening torque of fastener not specified in this section, refer to “Fasteners Information in Section 0A”.
1
21
3
I5RS0D170006-031
I5RS0D170008-01
Fastening part
Tightening torque
Note
N ⋅mkgf-mlb-ft
Fuel delivery pipe bolt 25 2.5 18.0 )
Ground wire bolt 11 1.1 8.0 )
Fuel tank bolt 45 4.5 33.0 )
Fuel filler hose clamp 2 0.2 1.5 )
Fuel pump assembly bolt 11 1.1 8.0 )