2000 SUZUKI SWIFT fuel pump

6E1-2 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
GENERAL DESCRIPTION
The engine and emission control system is divided into 3 major sub-systems: air/fuel delivery system, electronic
control system and emission control system.
Air/fuel delivery system includes fuel pump, throttle body, etc. Electronic control system includes ECM, various
sensors and controlled devices.
Emission control system includes EVAP and PCV system.

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-3
1. Tank pressure control valve
2. Fuel liquid separator
3. Fuel tank
4. Fuel pump
5. Fuel level sensor (gauge)
6. Fuel filter
7. Fuel pressure regulator
8. Throttle body
9. Fuel injector
10. MAP sensor
11. TP sensor
12. ISC actuator
(including CTP switch)
13. PCV valve
14. Exhaust manifold
15. Intake manifold
16. Heated oxygen sensor-117. Warm up three way catalytic
convertor (WU-TWC)
(if equipped)
18. Three way catalytic convertor
19. IAT sensor
20. ECT sensor
21. EFE heater
22. EVAP canister purge valve
23. EVAP canister
24. Heated oxygen sensor-2
25. Radiator fan motor
26. Ignition coil
27. Ignitor
28. Electric load
29. A / C amplifier (if equipped)
30. Camshaft position sensor
31. Crankshaft position sensor32. VSS (on A / T)
33. Transmission range sensor
(switch) (A / T)
34. Shift solenoid-A (A / T)
35. Shift solenoid-B (A / T)
36. Data link connector
37. VSS (in combination meter of
M / T vehicle)
38. PSP switch (if equipped)
39. Malfunction indicator lamp
40. Transmission range sensor
(switch) (A / T)
41. Main (Ignition) switch
42. Main fuse
43. Battery
44. Immobilizer indicator lamp

1. Air cleaner
2. Throttle body
3. Fuel injector
4. Fuel pressure regulator
5. Intake manifold
6. Fuel filter
7. Fuel tank
8. Fuel pump
9. Fuel feed line
10. Fuel return line
11. Air
12. Fuel
13. Air/fuel mixture
6E1-4 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
The main components of this system are fuel tank,
fuel pump, fuel filter, throttle body (including fuel injec-
tor, fuel pressure regulator and idle speed control ac-
tuator), fuel feed line, fuel return line and air cleaner.
The fuel in the fuel tank is pumped up by the fuel
pump, filtered by the fuel filter and fed under pressure
to injector installed in throttle body. As the fuel pres-
sure applied to the fuel injector (the fuel pressure in
the fuel feed line) is always kept a certain amount
higher than the pressure in the intake manifold by the
fuel pressure regulator, the fuel is injected into the
throttle body in conic dispersion when the injectoropens according to the injection signal from ECM.
The fuel relieved by the fuel pressure regulator re-
turns through the fuel return line to the fuel tank.
The injected fuel is mixed with the air which has been
filtered through the air cleaner in the throttle body. The
air/fuel mixture is drawn through clearance between
throttle valve and bore.
Then the intake manifold distributes the air/fuel mix-
ture to each combustion chamber.
For the structure and operation of the fuel tank and fil-
ter, refer to SECTION 6C “ENGINE FUEL”.
AIR AND FUEL DELIVERY SYSTEM

INFORMATION SENSORS
1. MAP sensor
2. TP sensor
3. IAT sensor
4. ECT sensor
5. Heated oxygen sensor-1
6. VSS
7. Ignition coil
8. Battery
9. Distributor (CMP sensor)
10. A / C controller (if equipped)
11. CKP sensor
12. CTP switch (in ISC actuator)
13. Heated oxygen sensor-2CONTROLLED DEVICES
a : Fuel injector
b : EVAP canister purge valve
c : Fuel pump relay
d : Malfunction indicator lamp
e : ISC actuator
f : Radiator fan control relay
g : Ignitor
h : EFE heater relay
i : ISC actuator relayOTHERS
A : ECM (PCM)
B : Main relay
C : EVAP canister
D : Injector resistor
E : EFE heater
F : Electric load diode
G : Data link connector
ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-5
The electronic control system consists of 1) various
sensors which detect the state of engine and driving
conditions, 2) ECM which controls various devices
according to the signals from the sensors and 3) vari-
ous controlled devices.
Functionally, it is divided into following sub systems:

Fuel injection control system

Idle speed control system
Fuel pump control system

A/C control system (if equipped)

Radiator fan control system

Evaporative emission control system

EFE heater control system

Oxygen sensor heater control system

Ignition control system

A / T control system
ELECTRONIC CONTROL SYSTEM

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-7
CON-
NECTOR
C02TERMI-
NAL
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26ECM ground
Power source (from main relay)
Blank
Blank
Blank
Blank
EVAP canister purge valve
Shift solenoid-B (A / T)
Shift solenoid-A (A / T)
Igniter
Idle speed control actuator
Fuel injector
Injector ground
Power source (from battery)
Power source (from main relay)
Idle speed control actuator relay
Malfunction indicator lamp
Immobilizer indicator lamp
Heater of HO2S-2
Radiator fan relay
Fuel pump relay
Main relay
Blank
Idle speed control actuator
EFE heater relay
Injector groundC031
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
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19
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21
22Data link connector
Vehicle speed sensor (+) (A / T)
Vehicle speed sensor (M / T)
Transmission range sensor (switch)“2”
Transmission range sensor (switch)“N”
Transmission range sensor (switch)“P”
Blank
Blank
Heated oxygen sensor-2
Blank
Fuel level sensor (gauge)
Blank
Data link connector
Vehicle speed sensor (–) (A / T)
Transmission range sensor (switch)“L”
Transmission range sensor (switch)“D”
Transmission range sensor (switch)“R”
A / C ON (output) signal for A / C control module
(if equipped)
Electric load signal
A / C (input) signal from A / C control module
(if equipped)
Ignition switch
Blank
Blank CIRCUITCON-
NECTORTERMI-
NALCIRCUIT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16Power source for sensors
Camshaft position sensor (+)
Crankshaft position sensor (+)
Closed throttle position switch
Manifold absolute pressure sensor
Throttle position sensor
Engine coolant temp. sensor
Heater of HO2S-1
Sensor ground
Camshaft position sensor (–)
Crankshaft position sensor (–)
EFE heater (monitor)
Heated oxygen sensor-1
Intake air temp sensor
Power steering pressure switch (if equipped)
Engine start signal circuit
C01
1. CMP sensor (in Distributor)
2. CKP sensor
3. TP sensor
4. MAP sensor
5. ECT sensor
6. IAT sensor
7. HO2S-1
8. HO2S-2
9. Transmission range switch (A / T)
10. VSS (A / T)
11. A / C control module (if equipped)
12. Heater blower switch
13. Fuel level sensor
14. Speedometer
15. P.SP switch
16. Rear defogger switch
17. Light switch
18. DLC
19. Fuel injector20. Injector resistor
21. Conister purge valve
22. Fuel pump relay
23. Rediator fan relay
24. EFE heater relay
25. ISC actuator relay
26. ISC actuator
27. Ignition coil
28. Igniter
29. Immobilizer indicator lamp
30. MIL
31. Main relay
32. Shift solenoid A (A / T)
33. Shift solenoid B (A / T)
34. Starter motor
35. Ignition switch

6E1-10 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
6) Start engine and warm it up to normal operating temperature.
If engine doesn’t start, 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.
NOTE:
Check that battery voltage is 11 V or more before operating
fuel pump.
7) Measure fuel pressure under each of the following conditions.
CONDITION
FUEL PRESSURE
At specified idle speed
0.9 – 1.4 kg / cm2
90 – 140 kPa
12.8 – 20.0 psi
With fuel pump operating
and engine at stop1.6 – 2.1 kg / cm2
160 – 210 kPa
22.7 – 29.9 psi
Within 1 min. after engine
(fuel pump) stop (Pressure
reduces as time passes)Over 0.9 kg / cm2
90 kPa
12.8 psi
If measured pressure doesn’t satisfy specification, refer to
“DIAGNOSTIC FLOW TABLE B-3” and check each possibly
defective part. Replace if found defective.
8) Relieve fuel pressure, referring to Section 6.
9) Remove fuel pressure gauge, hose & 3-way joint after remov-
ing air cleaner assembly.
10) Connect fuel feed hose to throttle body and clamp it securely.
11) Install air cleaner assembly.
12) With engine “OFF” and ignition switch “ON”, check for fuel
leaks.

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-11
1. Fuel filler
2. Ignition switch3. Fuel return hose
4. Fuel feed hose
1. Fuel pump 2. Filter 3. Fuel tank
FUEL PUMP
ON-VEHICLE INSPECTION
WARNING:
When fuel filler cap is removed in any procedure, work must be
done with no smoking, in a well-ventilated area and away from
any open flames.
1) Remove filler cap and turn ON ignition switch.
Then fuel pump operating sound should be heard from fuel filler
for about 2 seconds and stop. Be sure to reinstall fuel filler cap
after checking.
If above check result is not satisfactory, advance to “DIAGNOS-
TIC FLOW TABLE B-2”.
2) Fuel pressure should be felt at fuel return hose for 2 seconds af-
ter ignition switch ON.
If fuel pressure is not felt, advance to “DIAGNOSTIC FLOW
TABLE B-3”.
REMOVAL
1) Remove fuel tank from body according to procedure described
in Section 6C and remove fuel pump from fuel tank.
2) Remove fuel pump from its bracket.
INSPECTION
Check fuel pump filter for evidence of dirt and contamination. If
present, clean and check for presence of dirt in fuel tank.
INSTALLATION
1) Install fuel pump to its bracket.
2) Install fuel pump to fuel tank and then install fuel tank to body ac-
cording to procedure described in Section 6C.

6E1-26 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
1. Throttle body
FUEL PUMP RELAY
INSPECTION
1) Disconnect negative cable at battery.
2) Remove fuel pump relay (1) from relay box (2).
3) Structure of fuel pump relay is the same as that of main relay.
Check its resistance and operation using the same procedure as
that for main relay.
If found defective, replace.
FUEL INJECTOR RESISTOR
INSPECTION
1) With ignition switch OFF, disconnect resistor coupler.
2) Check resistor (1) for resistance.
Resistance: 1.9 – 2.1 Ω at 20C, 68F
If check result is not satisfied, replace.
FUEL CUT OPERATION
INSPECTION
NOTE:
Before inspection, check to make sure that gear shift lever is in
neutral position (with A/T model, selector lever in “P” range), A/C
is OFF and that parking brake lever is pulled all the way up.
1) Warm up engine to normal operating temperature.
2) While listening to sound of injector by using sound scope (2) or
such, increase engine speed to higher than 3,000 r / min.
3) Check to make sure that sound to indicate operation of injector
stops when throttle valve operation of injector stops when
throttle valve is closed instantly and it is heard again when en-
gine speed is reduced to less than about 2,000 r / min.
IDLE SPEED CONTROL SYSTEM
SYSTEM INSPECTION
NOTE:
Before inspection, check to make sure that:
–Gear shift lever is in neutral position (with A / T vehicle, selec-
tor lever in “P” range) and that parking brake lever is pulled
all the way up.
–Battery voltage is higher than 11 V.
–Throttle valve moves smoothly.
–Ambient temperature is higher than 0C (32F)