2000 SUZUKI SWIFT emission

ENGINE GENERAL INFORMATION AND DIAGNOSIS (SFI FOR G13) 6-1-69
Ignition coil assembly
for No.1 & No.4 spark plugs
Ignition coil assembly
for No.2 & No.3 spark plugs
Ignition switch
Main relay
Main
fuseRelay box
To ignition switch
CKP sensorCMP sensorNo.1 injector
No.2 injector
No.3 injector
No.4 injector Fuse box
DTC P0300 RANDOM MISFIRE DETECTED (Misfire detected at 2 or more
cylinders)
DTC P0301 CYLINDER 1 MISFIRE DETECTED
DTC P0302 CYLINDER 2 MISFIRE DETECTED
DTC P0303 CYLINDER 3 MISFIRE DETECTED
DTC P0304 CYLINDER 4 MISFIRE DETECTED
CIRCUIT DESCRIPTION
ECM (PCM) monitors crankshaft revolution speed and engine speed via the crankshaft position sensor and cylin-
der No. via the camshaft position sensor. Then it calculates the change in the crankshaft revolution speed and from
how many times such change occurred in every 200 or 1000 engine revolutions, it detects occurrence of misfire.
When ECM (PCM) detects a misfire (misfire rate per 200 revolutions) which can cause overheat and damage to
the three way catalytic converter, it makes the malfunction indicator lamp (MIL) flash as long as misfire occurs at
that rate.
After that, however, when the misfire rate drops, MIL remains ON until it has been judged as normal 3 times under
the same driving conditions.
Also, when ECM (PCM) detects a misfire (misfire rate per 1000 revolutions) which will not cause damage to three
way catalytic converter but can cause exhaust emission to be deteriorated, it makes MIL light according to the 2
driving cycle detection logic.

6C
ENGINE FUEL 6C-1
GENERAL DESCRIPTION6C-1 . . . . . . . . . . . . . .
Fuel System 6C-1. . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Pump Assembly 6C-1. . . . . . . . . . . . . . . . . . . ON-VEHICLE SERVICE6C-2 . . . . . . . . . . . . . . . .
Fuel Lines 6C-2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Tank 6C-2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Pump Assembly 6C-4. . . . . . . . . . . . . . . . .
SECTION 6C
ENGINE FUEL
NOTE:
For the descriptions (items) not found in this section, refer to the same section of Service Manual men-
tioned in FOREWORD of this manual.
CONTENTS
CAUTION:
BE SURE TO USE UNLEADED FUEL ONLY. USE OF LEADED AND / OR LOW LEAD FUEL CAN RESULT
IN ENGINE DAMAGE AND REDUCE THE EFFECTIVENESS OF THE EMISSION CONTROL SYSTEM.
GENERAL DESCRIPTION
FUEL SYSTEM
The main components of the fuel system are fuel tank, fuel pump, fuel filter and fuel level gauge and it includes
three lines; fuel feed line, fuel return line and fuel vapor line.
For the details of fuel vapor flow, refer to Section 6E “ENGINE AND EMISSION CONTROL SYSTEM”.
FUEL PUMP ASSEMBLY (WITH FUEL LEVEL
GAUGE)
The fuel pump assembly consists of fuel pump and fuel level gauge.
For structure and operation of the fuel pump, refer to Section 6E.

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

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

6E1-6 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
IG COIL
METER
FI