fan SUZUKI SWIFT 2000 1.G SF310 Service Owner's Guide

1. Cooling fan motor
2. Radiator
ENGINE COOLING 6B-3
THERMOSTAT
A wax pellet type thermostat is used in the coolant outlet passage
to control the flow of engine coolant, to provide fast engine warm
up and to regulate coolant temperatures.
A wax pellet element is hermetically contained in a metal case, and
expands when heated and contracts when cooled.
When the pellet is heated and expands, the metal case pushes
down the valve to open it.
As the pellet is cooled, the contraction allows the spring to close the
valve.
Thus, the valve remains closed while the coolant is cold, preventing
circulation of coolant through the radiator.
At this point, coolant is allowed to circulate only throughout the en-
gine to warm it quickly and evenly.
As the engine warms, the pellet expands and the thermostat valve
opens, permitting coolant to flow through the radiator.
In the top portion of the thermostat, an air bleed valve (1) is pro-
vided; this valve is for venting out the gas or air, if any, that is accu-
mulated in the circuit.
Thermostat functional spec. ± 2.8
C (5.0
F)
Temp. at which valve
begins to open88
C (190
F)
Temp. at which valve
become fully open100
C (212
F)
COOLING FAN
The cooling fan is driven by electric motor, and the motor is acti-
vated by ECM / PCM (engine coolant temp.). For its details, refer to
Section 6E.
WARNING:
Keep hands, tools, and clothing away from engine cooling
fan to help prevent personal injury. This fan is electric and
can come on whether or not the engine is running. The fan
can start automatically in response to the ECM / PCM (en-
gine coolant temp.) with the ignition switch in the “ON”
position.

6B-4 ENGINE COOLING
COOLANT (WATER) TEMP. GAUGE
The coolant temp. gauge is included in engine coolant temp. (ECT)
sensor (1). This gauge activates a temp. meter in the instrument
cluster.
DIAGNOSIS
ConditionPossible CauseCorrection
Engine overheatsLoose or broken water pump belt
Not enough coolant
Faulty thermostat
Faulty water pump
Dirty or bent radiator fins
Coolant leakage on cooling system
Defective cooling fan motor
Plugged radiator
Faulty radiator cap
Maladjusted ignition timing
Dragging brakes
Slipping clutchAdjust or replace.
Check coolant level and add as
necessary.
Replace.
Replace.
Clean or remedy.
Repair.
Check and replace as
necessary.
Check and replace radiator as
necessary.
Replace.
Adjust.
Adjust brake.
Adjust or replace.

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-1
GENERAL DESCRIPTION6E1- 2 . . . . . . . . . . . . . .
AIR AND FUEL DELIVERY SYSTEM 6E1- 4. . . . .
ELECTRONIC CONTROL SYSTEM 6E1- 5. . . . . .
ON-VEHICLE SERVICE6E1- 8 . . . . . . . . . . . . . . . .
General 6E1- 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Accelerator Cable Adjustment 6E1- 8. . . . . . . . . .
Idle Speed Inspection 6E1- 8. . . . . . . . . . . . . . . . .
AIR AND FUEL DELIVERY SYSTEM 6E1- 9. . . . .
Fuel Pressure 6E1- 9. . . . . . . . . . . . . . . . . . . . . . . .
Fuel Pump 6E1-11. . . . . . . . . . . . . . . . . . . . . . . . . . .
Throttle Body 6E1-12. . . . . . . . . . . . . . . . . . . . . . . .
Fuel injector 6E1-15. . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRONIC CONTROL SYSTEM 6E1-17. . . . . .
ECM 6E1-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MAP Sensor 6E1-18. . . . . . . . . . . . . . . . . . . . . . . . .
TP Sensor 6E1-19. . . . . . . . . . . . . . . . . . . . . . . . . . .
IAT Sensor 6E1-20. . . . . . . . . . . . . . . . . . . . . . . . . .
ECT Sensor 6E1-21. . . . . . . . . . . . . . . . . . . . . . . . .
Heated Oxygen Sensor -1 and -2 6E1-23. . . . . . .
Vehicle Speed Sensor 6E1-24. . . . . . . . . . . . . . . . .
Fuel Level Sensor (Gauge) 6E1-24. . . . . . . . . . . . Crankshaft Position Sensor 6E1-25. . . . . . . . . . . .
Main Relay 6E1-25. . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Pump Relay 6E1-26. . . . . . . . . . . . . . . . . . . . .
Fuel Injector Resistor 6E1-26. . . . . . . . . . . . . . . . .
Fuel Cut Operation 6E1-26. . . . . . . . . . . . . . . . . . .
ISC System 6E1-26. . . . . . . . . . . . . . . . . . . . . . . . . .
ISC Actuator 6E1-27. . . . . . . . . . . . . . . . . . . . . . . . .
CTP Switch 6E1-28. . . . . . . . . . . . . . . . . . . . . . . . . .
ISC Actuator Relay 6E1-29. . . . . . . . . . . . . . . . . . .
EFE Heater Control System 6E1-29. . . . . . . . . . . .
EFE Heater 6E1-29. . . . . . . . . . . . . . . . . . . . . . . . . .
EFE Heater Relay 6E1-30. . . . . . . . . . . . . . . . . . . .
Radiator Fan Control System 6E1-30. . . . . . . . . .
Radiator Fan Control Relay 6E1-31. . . . . . . . . . . .
Radiator Fan 6E1-31. . . . . . . . . . . . . . . . . . . . . . . . .
EMISSION CONTROL SYSTEM 6E1-32. . . . . . . . .
EVAP Control System 6E1-32. . . . . . . . . . . . . . . . .
PCV System 6E1-34. . . . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOLS6E1-36 . . . . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUE
SPECIFICATIONS6E1-36 . . . . . . . . . . . . . . . . . . . .
SECTION 6E1
ENGINE AND EMISSION CONTROL SYSTEM
(TBI FOR G10)
WARNING:
For vehicles equipped with a Supplemental Inflatable Restraint Air Bag System:

Service on or around Air Bag System Components or Wiring must be performed only by an authorized
Suzuki dealer. Please observe all WARNINGS and SERVICE PRECAUTIONS in Section 9J under “On-
Vehicle Service” and the Air Bag System Component and Wiring Location view in Section 9J before
performing service on or around Air Bag System Components or Wiring. Failure to follow WARNINGS
could result in unintended air bag deployment or could render the air bag inoperative. Either of these
two conditions may result in severe injury.

SDM can maintain sufficient voltage to cause a deployment of air bags for up to 15 seconds after igni-
tion switch is turned to “LOCK” position, battery is disconnected or fuse powering SDM is removed.
Work must be started after 15 seconds from the time.
NOTE:
For the descriptions for vehicle without warm up three way catalytic converter (WU TWC), refer to the same
section of the Service Manual mentioned in the FOREWORD of this manual.
CONTENTS

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

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
18
19
20
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

6E1-30 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
1. Insulator
2. Lower gasket
3. Heater
1. Intake manifold
2. EFE heater
1. EFE heater relay
2. Relay box
1. Radiator fan motor
INSPECTION

Check lower gasket for damage and deterioration. Replace as
necessary.

Check heater and insulator for crack, corrosion or any other dam-
age. Replace as necessary.
INSTALLATION
1) Clean mating surfaces of throttle body and intake manifold that
mate with EFE heater.
2) Install EFE heater to intake manifold.
Use new upper gasket.
3) Install throttle body according to procedure described previous-
ly.
4) Connect EFE heater coupler.
EFE HEATER RELAY
INSPECTION
1) Disconnect negative cable at battery.
2) Remove EFE heater relay from relay box.
3) Structure of EFE heater 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.
RADIATOR FAN CONTROL SYSTEM
SYSTEM INSPECTION
WARNING:
Keep hands, tools, and clothing away from engine cooling
fan to help prevent personal injury. This fan is electric and
can come on whether or not the engine is running. The fan
can start automatically in response to the ECT sensor with
the ignition switch in the “ON” position.
Connect SUZUKI scan tool (2) to DLC (3).
Start engine and keep it running to warm it up.
Now check to ensure that radiator fan is started when the coolant
temperature displayed on SUZUKI scan tool reaches 96C
(205F).
If check result is not satisfactory, check RFC relay, wire harness,
ECT sensor, ECM, coolant temp. meter and sender gauge unit.
Refer to “DTC P0480 FLOW TABLE” of Section 6 and “COOLANT
TEMP. METER AND GAUGE UNIT” of Section 8.

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-31
1. RFC relay
2. Relay box
RADIATOR FAN CONTROL RELAY (RFC RELAY)
INSPECTION
1) Disconnect negative cable at battery.
2) Remove RFC relay from relay box.
3) Structure of RFC 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.
RADIATOR FAN
INSPECTION
1) Disconnect negative cable at battery.
2) Disconnect radiator fan motor connector.
3) Connect battery to the motor and check for operation.
If fan fails to operate, replace.

6E2
ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13) 6E2-1
GENERAL DESCRIPTION6E2- 2 . . . . . . . . . . . . . .
AIR INTAKE SYSTEM 6E2- 6. . . . . . . . . . . . . . . . . .
FUEL DELIVERY SYSTEM 6E2- 7. . . . . . . . . . . . . .
ELECTRONIC CONTROL SYSTEM 6E2- 8. . . . . .
Engine and Emission Control Input /
Output Table 6E2- 9. . . . . . . . . . . . . . . . . . . . . . . .
DIAGNOSISSee Section 6. . . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE6E2-13 . . . . . . . . . . . . . . . .
Accelerator Cable Adjustment 6E2-13. . . . . . . . . .
Idle Speed/Idle Air Control (IAC)
Duty Inspection 6E2-14. . . . . . . . . . . . . . . . . . . . .
AIR INTAKE SYSTEM 6E2-15. . . . . . . . . . . . . . . . . .
Throttle Body 6E2-15. . . . . . . . . . . . . . . . . . . . . . . .
Idle Air Control Valve 6E2-17. . . . . . . . . . . . . . . . .
FUEL DELIVERY SYSTEM 6E2-18. . . . . . . . . . . . . .
Fuel Pressure Inspection 6E2-18. . . . . . . . . . . . . .
Fuel Pump 6E2-21. . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Pressure Regulator 6E2-22. . . . . . . . . . . . . . .
Fuel Injector 6E2-23. . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRONIC CONTROL SYSTEM 6E2-27. . . . . .
ECM / PCM 6E2-27. . . . . . . . . . . . . . . . . . . . . . . . . .
MAP Sensor 6E2-27. . . . . . . . . . . . . . . . . . . . . . . . .
TP Sensor 6E2-28. . . . . . . . . . . . . . . . . . . . . . . . . . .
IAT Sensor 6E2-29. . . . . . . . . . . . . . . . . . . . . . . . . .
ECT Sensor 6E2-30. . . . . . . . . . . . . . . . . . . . . . . . . Heated Oxygen Sensor -1 and -2 6E2-31. . . . . . .
Camshaft Position Sensor 6E2-32. . . . . . . . . . . . .
Crankshaft Position Sensor 6E2-32. . . . . . . . . . . .
Vehicle Speed Sensor 6E2-33. . . . . . . . . . . . . . . . .
Fuel Level Sensor (gauge) 6E2-33. . . . . . . . . . . . .
Main Relay, Fuel Pump Relay and
Radiator Fan Control Relay 6E2-33. . . . . . . . . . .
Fuel Cut Operation (Inspection) 6E2-34. . . . . . . .
Radiator Fan Control System 6E2-34. . . . . . . . . .
System Inspection 6E2-34. . . . . . . . . . . . . . . . . .
Radiator Fan 6E2-34. . . . . . . . . . . . . . . . . . . . . . .
EMISSION CONTROL SYSTEM 6E2-35. . . . . . . . .
EGR System 6E2-35. . . . . . . . . . . . . . . . . . . . . . . . .
EVAP Control System 6E2-36. . . . . . . . . . . . . . . . .
EVAP Canister Purge Inspection 6E2-36. . . . . .
Vacuum Passage Inspection 6E2-37. . . . . . . . .
Vacuum Hose Inspection 6E2-37. . . . . . . . . . . .
EVAP Canister Purge Valve
Inspection 6E2-37. . . . . . . . . . . . . . . . . . . . . . . .
EVAP Canister Inspection 6E2-38. . . . . . . . . . .
PCV System 6E2-38. . . . . . . . . . . . . . . . . . . . . . . . .
PCV Hose Inspection 6E2-38. . . . . . . . . . . . . . .
PCV Valve Inspection 6E2-38. . . . . . . . . . . . . . .
SPECIAL TOOLS6E2-39 . . . . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUE
SPECIFICATIONS6E2-39 . . . . . . . . . . . . . . . . . . . . .
SECTION 6E2
ENGINE AND EMISSION CONTROL SYSTEM
(SFI FOR G13)
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 autho-
rized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under “Gener-
al Description” in air bag system section in order to confirm whether you are performing service on
or near the air bag system components or wiring. Please observe all WARNINGS and “Service Precau-
tions” 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).
CONTENTS

6E2-8 ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13)
INFORMATION SENSORS
-1. MAP sensor
-2. TP sensor
-3. IAT sensor
-4. ECT sensor
-5. Heated oxygen sensor-1
5-1. Heated oxygen sensor-2
-6. VSS (A / T)
-7. Transmission range switch (A / T)
-8. Battery
-9. CMP sensor
-10. CKP sensor
-11. Fuel level sensor (gauge) (in fuel tank)
-12. PSP switch
-13. A / C control module (if equipped)
-14. VSS (speedometer) (M / T)OTHERS
A: ECM (PCM)
B: Main relay
C: EVAP canister
D: Data link connector CONTROL DEVICES
a: Fuel injector
b: EVAP canister purge valve
c: Fuel pump relay
d: EGR valve (step motor)
e: Malfunction indicator lamp
f: Ignition coil assembly
g: Radiator fan control relay
h: IAC valve
The electronic control system consists of 1) various
sensors which detect the state of engine and driving
conditions, 2) ECM (PCM) which controls various de-
vices according to the signals from the sensors and
3) various controlled devices.
Functionally, it is divided into nine sub systems:

Fuel injection control system

Idle speed control system
Fuel pump control system

A / C control system (if equipped)

Radiator fan control system

EGR system

Evaporative emission control system

Oxygen sensor heater control system

Ignition control system
Also, with A / T model, PCM controls A / T.
ELECTRONIC CONTROL SYSTEM