2000 SUZUKI SWIFT fuel pressure

ENGINE AND EMISSION CONTROL SYSTEM 6E1-1
6F1
6F2
6G
6H
6E1
7A
7A1
7B1
7C1
7D
7E
7F
8A
8B
8C
8D
8E
9
10
10A
10B
SECTION 6E1
ENGINE AND EMISSION CONTROL SYSTEM
CONTENTS
GENERAL DESCRIPTION ............................ 6E1-2
AIR INTAKE SYSTEM ............................... 6E1-5
FUEL DELIVERY SYSTEM ....................... 6E1-6
FUEL PUMP ........................................... 6E1-6
ELECTRONIC CONTROL SYSTEM .......... 6E1-7
ENGINE & EMISSION CONTROL
INPUT/OUTPUT TABLE ........................ 6E1-8
ECM INPUT/OUTPUT CIRCUIT
DIAGRAM............................................... 6E1-9
ECM TERMINAL ARRANGEMENT
TABLE .................................................. 6E1-13
ON-VEHICLE SERVICE .............................. 6E1-15
ACCELERATOR CABLE
ADJUSTMENT ..................................... 6E1-15
IDLE SPEED/IDLE AIR CONTROL
(IAC) DUTY INSPECTION ................... 6E1-15
IDLE MIXTURE INSPECTION /
ADJUSTMENT (VEHICLE WITHOUT
HEATED OXYGEN SENSOR) ............. 6E1-17
AIR INTAKE SYSTEM ............................. 6E1-18
THROTTLE BODY ............................... 6E1-18IDLE AIR CONTROL VALVE (IAC
VALVE) ................................................ 6E1-20
FUEL DELIVERY SYSTEM ..................... 6E1-21
FUEL PRESSURE INSPECTION ........ 6E1-21
FUEL PUMP WITH PRESSURE
REGULATOR ....................................... 6E1-22
FUEL INJECTOR ................................. 6E1-23
ELECTRONIC CONTROL SYSTEM ....... 6E1-27
ENGINE CONTROL MODULE
(ECM) ................................................... 6E1-27
MANIFOLD ABSOLUTE PRESSURE
SENSOR (MAP SENSOR)................... 6E1-27
THROTTLE POSITION SENSOR (TP
SENSOR) ............................................. 6E1-28
INTAKE AIR TEMPERATURE
SENSOR (IAT SENSOR) ..................... 6E1-29
ENGINE COOLANT TEMPERATURE
SENSOR (ECT SENSOR) ................... 6E1-30
HEATED OXYGEN SENSOR (HO2S-1
AND HO2S-2) ...................................... 6E1-31
CAMSHAFT POSITION SENSOR ....... 6E1-32 WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System :
Service on and around the air bag system components or wiring must be performed only by an
authorized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under
“General Description” in air bag system section in order to confirm whether you are performing ser-
vice on or near the air bag system components or wiring. Please observe all WARNINGS and “Ser-
vice Precautions” under “On-Vehicle Service” in air bag system section before performing service
on or around the air bag system components or wiring. Failure to follow WARNINGS could result in
unintentional activation of the system or could render the system inoperative. Either of these two
conditions may result in severe injury.
Technical service work must be started at least 90 seconds after the ignition switch is turned to the
“LOCK” position and the negative cable is disconnected from the battery. Otherwise, the system
may be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
NOTE:
Whether the following system (parts) are used in the particular vehicle or not depends on vehicle
specifications. Be sure to bear this in mind when performing service work.
EGR valve
Heated oxygen sensor(s) or CO adjusting resistor
Three way catalytic converter
Immobilizer indicator lamp
Knock sensor

6E1-2 ENGINE AND EMISSION CONTROL SYSTEM
CRANKSHAFT POSITION SENSOR .. 6E1-32
VEHICLE SPEED SENSOR (VSS) ...... 6E1-33
FUEL LEVEL SENSOR (GAUGE) ....... 6E1-33
KNOCK SENSOR (IF EQUIPPED) ...... 6E1-33
MAIN RELAY, FUEL PUMP RELAY
AND RADIATOR FAN RELAY NO.1.... 6E1-33
FUEL CUT OPERATION ..................... 6E1-34
RADIATOR FAN CONTROL
SYSTEM .............................................. 6E1-34
RADIATOR FAN RELAY NO. 2 AND
NO.3 ..................................................... 6E1-34OUTPUT SIGNALS OF THROTTLE
VALVE OPENING AND ENGINE
COOLANT TEMP. (VEHICLE WITH
A/T ONLY) ........................................... 6E1-36
EMISSION CONTROL SYSTEM ............. 6E1-36
EGR SYSTEM ..................................... 6E1-36
EVAPORATIVE EMISSION CONTROL
SYSTEM .............................................. 6E1-37
PCV SYSTEM ...................................... 6E1-39
SPECIAL TOOL .......................................... 6E1-40
TIGHTENING TORQUE SPECIFICATION . 6E1-41
GENERAL DESCRIPTION
The engine and emission control system is divided into 4 major sub-systems : air intake system, fuel delivery
system, electronic control system and emission control system.
Air intake system includes air cleaner, throttle body, IAC valve and intake manifold.
Fuel delivery system includes fuel pump, delivery pipe, fuel pressure regulator, etc. Electronic control system
includes ECM, various sensors and controlled devices.
Emission control system includes EGR, EVAP and PCV system.

ENGINE AND EMISSION CONTROL SYSTEM 6E1-5
AIR INTAKE SYSTEM
The main components of the air intake system are air cleaner (1), air cleaner outlet hose (2), throttle body (3),
idle air control valve (4) and intake manifold (5).
The air (by the amount corresponding to the throttle valve (6) opening and engine speed) is filtered by the air
cleaner (1), passes through the throttle body (3), is distributed by the intake manifold (5) and finally drawn into
each combustion chamber.
When the idle air control valve (4) is opened according to the signal from ECM, the air (7) bypasses the throttle
valve (6) through bypass passage and is finally drawn into the intake manifold (5).
1. Air Cleaner 16. Immobilizer indicator lamp (if equipped) 31. Monitor connector (vehicle without immobi-
lizer indicator lamp)
2. EVAP canister purge valve 17. Knock sensor (if equipped) 31-1. Diagnosis switch terminal (vehicle without
immobilizer indicator lamp)
3. IAT sensor 18. ECT sensor 31-2. Test switch terminal (vehicle without immobi-
lizer indicator lamp)
4. TP sensor 19. CMP sensor 31-3. Duty output terminal (vehicle without immobi-
lizer indicator lamp)
5. IAC valve 20. CKP sensor 32. Stop lamp
6. MAP sensor 21. VSS 33. Stop lamp switch
7. EGR valve (if equipped) 22. Radiation fan 34. ECM
8. EVAP canister 23. Malfunction indicator lamp in combination meter 35. Barometric pressure sensor (if equipped)
9. Tank pressure control valve (built-in fuel pump) 24. Park/Neutral position switch (A/T) 36. Battery
10. Fuel pump (with pressure regulator) 25. Ignition switch 37. CO adjusting resistor (if equipped)
11. Fuel level sensor (vehicle with immobilizer indi-
cator lamp)26. Starter magnetic switch 38. A/C compressor clutch (if equipped)
12. Ignition coil assembly 27. TCM 39. A/C switch (if equipped)
13. Fuel injector 28. Transmission range switch (A/T) 40. A/C evaporator temp. sensor (if equipped)
14. Heated Oxygen Sensor (HO2S)-1
(if equipped)29. DLC 41. Immobilizer control module (if equipped)
15. Heated Oxygen Sensor (HO2S)-2
(if equipped)30. Electric load 42. Main relay
54
2
1
6
3
7

6E1-6 ENGINE AND EMISSION CONTROL SYSTEM
FUEL DELIVERY SYSTEM
The fuel system consists of fuel tank (1), fuel pump (2) (with built-in fuel filter (3) and fuel pressure regulator (4)),
delivery pipe (5), injectors (6) and fuel feed line (7).
The fuel (8) in the fuel tank (1) is pumped up by the fuel pump (2), sent into delivery pipe (5) and injected by the
injectors (6).
As the fuel pump assembly is equipped with built-in fuel filter (3) and fuel pressure regulator (4), the fuel (8) is fil-
tered and its pressure is regulated before being sent to the delivery pipe (5).
The excess fuel from fuel pressure regulation process is returned back (9) into the fuel tank.
Also, fuel vapor generated in fuel tank is led through the fuel vapor line (10) into the EVAP canister (12).
FUEL PUMP
An in-tank type electric pump has been adopted for the fuel pump
(1). Incorporated in the pump assembly are;
Tank pressure control valve (2) which keeps the pressure in
the fuel tank constant, and prevents the fuel from spouting
and tank itself from being deformed.
Relief valve (3) which prevents the pressure in tank from ris-
ing excessively.
Fuel cut valve (4) which closes as the float rises so that the
fuel will not enter the canister when the fuel level in the tank
rises high depending on the fuel level in the tank and the
vehicle tilt angle.
Also, a fuel filter (5) and a fuel pressure regulator (6) are included
and a fuel level gauge (7) is attached.
Addition of the fuel pressure regulator (6) to the fuel pump makes
it possible to maintain the fuel pressure at constant level and
ECM controls compensation for variation in the intake manifold
pressure.
11. Intake manifold

6E1-8 ENGINE AND EMISSION CONTROL SYSTEM
ENGINE & EMISSION CONTROL INPUT/OUTPUT TABLE
INPUTOUTPUT
ELECTRIC CONTROL DEVICE
FUEL LEVEL SENSOR (VEHICLE WITH IMMOBILIZER INDICATOR LAMP) For detecting fuel level DIAGNOSIS SWITCH (VEHICLE WITHOUT IMMOBILIZER INDICATOR LAMP)
BAROMETRIC PRESSURE SENSOR (VEHICLE WITH EGR VALVE)
STOP LAMP SWITCH
START SWITCH
IGNITION SWITCH
LIGHTING SWITCH
REAR DEFOGGER SWITCH
BLOWER SWITCH
A/C SWITCH
A/C EVAP TEMP. SENSOR
VSS
HEATED OXYGEN SENSOR-1
(VEHICLE WITH EGR VALVE)
HEATED OXYGEN SENSOR-2
(VEHICLE WITH IMMOBILIZER INDICATOR LAMP)For detecting deterioration of
three way catalytic convertor
IAT SENSOR
ECT SENSOR
TP SENSOR
MAP SENSOR
CMP SENSOR
CKP SENSOR
TEST SWITCH TERMINAL
(VEHICLE WITHOUT IMMOBILIZER INDICATOR LAMP)
KNOCK SENSOR (VEHICLE WITH EGR VALVE)
FUEL PUMP RELAY
FUEL INJECTOR
HO2S HEATER
IAC VALVE
IGNITION COIL WITH IGNITER
EGR VALVE (IF EQUIPPED)
EVAP CANISTER PURGE VALVE
A/C COMPRESSOR CLUTCH
RADIATOR FAN RELAY
MIL
MAIN RELAY
TRANSMISSION CONTROL MODULE SIGNAL FROM SENSOR, SWITCH AND CONTROL MODULE

6E1-10 ENGINE AND EMISSION CONTROL SYSTEM
1. CKP sensor 20. Blank 39. Ignition coil assembly (for No.1 and No.4 spark plugs)
2. CMP sensor 21. A/C switch 40. Ignition coil assembly (for No.2 and No.3 spark plugs)
3. VSS 22. A/C pressure switch 41. Stop lamp switch
4. MAP sensor 23. Immobilizer control module 42. Stop lamp
5. Knock sensor (if equipped) 24. Data link connector 43. Lighting switch
6. TP sensor 25. Injector No.1 44. Position lamp
7. ECT sensor 26. Injector No.2 45. Rear defogger switch
8. IAT sensor 27. Injector No.3 46. Rear defogger
9. Heated oxygen sensor-1 (if equipped) 28. Injector No.4 47. A/C compressor clutch (if equipped)
10. Heated oxygen sensor-2 (if equipped) 29. IAC valve 48. Ignition switch
11. A/C evaporator temp. sensor 30. EVAP canister purge valve 49. Main relay
12. Combination meter 31. Fuel pump relay 50. Transmission range switch (A/T)
13. Fuel level sensor (vehicle with immobilizer
indicator lamp)32. Fuel pump 51. Starting motor
14. TCM 33. Radiator fan relay 52. Shield wire
15. Transmission range switch 34. Radiator fan motor 53. Main fuse
16. ABS control module 35. EGR valve (if equipped) 54. Barometric pressure sensor
17. CO adjusting resistor (if equipped) 36. Malfunction indicator lamp 55. Immobilizer indicator lamp (if equipped)
18. Heater fan motor 37. Tachometer 56. Engine ground
19. Heater fan switch 38. Monitor connector (vehicle without immo-
bilizer indicator lamp)57. Body ground

6E1-12 ENGINE AND EMISSION CONTROL SYSTEM
1. CKP sensor 20. Blank 39. Ignition coil assembly (for No.1 and No.4 spark plugs)
2. CMP sensor 21. A/C switch 40. Ignition coil assembly (for No.2 and No.3 spark plugs)
3. VSS 22. A/C pressure switch 41. Stop lamp switch
4. MAP sensor 23. Immobilizer control module 42. Stop lamp
5. Knock sensor (if equipped) 24. Data link connector 43. Lighting switch
6. TP sensor 25. Injector No.1 44. Position lamp
7. ECT sensor 26. Injector No.2 45. Rear defogger switch
8. IAT sensor 27. Injector No.3 46. Rear defogger
9. Heated oxygen sensor-1 (if equipped) 28. Injector No.4 47. A/C compressor clutch (if equipped)
10. Blank 29. IAC valve 48. Ignition switch
11. A/C evaporator temp. sensor 30. EVAP canister purge valve 49. Main relay
12. Combination meter 31. Fuel pump relay 50. Transmission range switch (A/T)
13. Fuel level sensor (vehicle with immobilizer
indicator lamp)32. Fuel pump 51. Starting motor
14. TCM 33. Radiator fan relay 52. Shield wire
15. Transmission range switch 34. Radiator fan motor 53. Main fuse
16. ABS control module 35. EGR valve (if equipped) 54. Barometric pressure sensor
17. CO adjusting resistor (if equipped) 36. Malfunction indicator lamp 55. Immobilizer indicator lamp (if equipped)
18. Heater fan motor 37. Tachometer 56. Engine ground
19. Heater fan switch 38. Monitor connector (vehicle without immo-
bilizer indicator lamp)57. Body ground

ENGINE AND EMISSION CONTROL SYSTEM 6E1-21
FUEL DELIVERY SYSTEM
FUEL PRESSURE INSPECTION
1) Relieve fuel pressure in fuel feed line referring to “Fuel Pres-
sure Relief Procedure” in Section 6.
2) Disconnect fuel feed hose from fuel delivery pipe.
3) Connect special tools and hose between fuel delivery pipe
and fuel feed hose (1) as shown in figure, and clamp hoses
securely to ensure no leaks occur during checking.
Special tool
(A) : 09912-58441
(B) : 09912-58431
(C) : 09912-58490
4) Check that battery voltage is above 11 V.
5) Turn ignition switch ON to operate fuel pump and after 2 sec-
onds turn it OFF. Repeat this 3 or 4 times and then check
fuel pressure.
Fuel pressure specification WARNING:
Be sure to perform work in a well-ventilated area and
away from any open flames, or there is a risk of a fire
breaking out.
CAUTION:
A small amount of fuel may be released when fuel hose is
disconnected. Place container under the joint with a
shop cloth so that released fuel is caught in container or
absorbed in cloth. Place that cloth in an approved con-
tainer.
(A)
(B)
(C)1
CONDITION FUEL PRESSURE
With fuel pump operating and
engine stopped270 – 310 kPa
(2.7 – 3.1 kg/cm
2,
38.4 – 44.0 psi) At specified idle speed
With 1 min. after engine (fuel
pump) stop (Pressure
reduces as time passes)over 250 kPa
(2.5 kg/cm
2, 35.6 psi)