2000 SUZUKI SWIFT emission

6E2-2 ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13)
The engine and emission control system is divided
into 4 major sub-systems: air intake system, fuel de-
livery 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 (PCM), various sensors and
controlled devices.
Emission control system includes EGR, EVAP and
PCV system.
GENERAL DESCRIPTION

ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13) 6E2-3

6E2-4 ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13)

ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13) 6E2-5

6E2-6 ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13)
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 accord-
ing to the signal from ECM (PCM), the air (7) by-
passes the throttle valve (6) through bypass passage
and is finally drawn into the intake manifold (5).
AIR INTAKE SYSTEM

6. EVAP canister purge valve
ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13) 6E2-7
The fuel delivery system consists of the fuel tank (11),
fuel pump (12), fuel filter (10), fuel pressure regulator
(3), delivery pipe (2) and fuel injectors (1).
The fuel in the fuel tank (11) is pumped up by the fuel
pump (12), filtered by the fuel filter (10) and fed under
pressure to each injector through the delivery pipe
(2). As the fuel pressure applied to the injector (the
fuel pressure in the fuel feed line (7)) is always kept
a certain amount higher than the pressure in the in-take manifold (4) by the fuel pressure regulator (3),
the fuel is injected into the intake port of the cylinder
head when the injector opens according to the injec-
tion signal from ECM (PCM).
The fuel relieved by the fuel pressure regulator re-
turns through the fuel return line (8) to the fuel tank
(11).
Also, fuel vapor generated in fuel tank is led through
the fuel vapor line (9) into the EVAP canister (5).
FUEL DELIVERY SYSTEM

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

ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13) 6E2-9
FUEL PUMP RELAY
FUEL INJECTOR
HO2S HEATER
IAC VALVE
IGNITION COIL WITH IGNITER
EGR VALVE
EVAP CANISTER PURGE VALVE
A/C CONTROL MODULE
RADIATOR FAN RELAY
MIL
MAIN RELAY
SIGNAL FROM SENSOR, SWITCH AND CONTROL MODULE
OUTPUT
INPUT
ENGINE & EMISSION CONTROL INPUT / OUTPUT TABLE
ELECTRIC CONTROL DEVICE
FUEL LEVEL SENSORFor detecting fuel level
BAROMETRIC PRESSURE SENSOR
START SWITCH
IGNITION SWITCH
LIGHTING SWITCH
REAR DEFOGGER SWITCH (IF EQUIPPED)
BLOWER SWITCH
A / C SWITCH
VSS
HEATED OXYGEN SENSOR-1
HEATED OXYGEN SENSOR-2For detecting deterioration of
three way catalytic convertor
IAT SENSOR
ECT SENSOR
TP SENSOR
MAP SENSOR
CMP SENSOR
CKP SENSOR