2000 SUZUKI SWIFT throttle

6E1-16 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
1. Injector
1
3
2
1. Injector cavity
2. Lower O-ring
3. Upper O-ring
1. Positive terminal
REMOVAL
NOTE:
Use care when handling fuel injector especially not to damage
filter and its needle.
Also, because injector is an electrical component, it should
not be immersed in any type of liquid solvent or cleaner, or it
may get damaged.
1) Relieve fuel pressure, referring to Section 6.
2) Disconnect battery negative cable at battery.
3) Remove air cleaner assembly referring to Section 6A.
4) Remove air cleaner mounting stay from throttle body.
5) Remove injector wire and then remove fuel injector from throttle
body.
INSPECTION
Check fuel injector filter for evidence of dirt and contamination. If
present, clean and check for presence of dirt in fuel lines and fuel
tank.
INSTALLATION
1) Apply thin coat of spindle oil or gasoline to new upper and lower
O-rings, install lower O-ring and upper O-ring to injector.
2) Install injector by pushing it straight into fuel injector cavity.
Never turn injector while pushing it.

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-19
1. TP sensor
2. TP sensor
adjusting holes
3. TP sensor
screw holes4. Turn TP sensor after
fitting and align holes.
1. Throttle stop screw
2. Throttle lever
3. Thickness gauge
THROTTLE POSITION SENSOR (TP SENSOR)
INSPECTION
Check TP sensor referring to step 2 of DTC P0121 Flow Table. If
malfunction is found, replace.
REMOVAL
1) Disconnect battery negative cable at battery.
2) Remove air cleaner assembly referring to Section 6A.
3) Disconnect coupler from TP sensor.
4) Remove TP sensor from throttle body.
INSTALLATION
1) Install TP sensor to throttle body.
Fit TP sensor to throttle body in such way that its adjusting holes
are a little away from TP sensor screw holes as shown in left fig-
ure and turn TP sensor clockwise so that those holes align.
Then hand-tighten TP sensor screws.
2) Connect coupler to TP sensor securely.
3) Install air cleaner assembly referring to Section 6A.
4) Connect battery negative cable battery.
5) Adjust installation angle of TP sensor according to procedure
described in item “ADJUSTMENT”.
ADJUSTMENT
1) Insert 3.5 mm (0.14 in.) thickness gauge between throttle stop
screw and throttle lever.
CAUTION:
As throttle stop screw is factory adjusted precisely, don’t
remove or adjust it.

6E1-20 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
1. Plunger
2. Throttle lever screw
2) Check to make sure that plunger of ISC actuator and throttle le-
ver screw are not in contact with each other. If they are, warm
up engine.
3) Loosen TP sensor screws.
a) Connect SUZUKI scan tool to DLC with ignition switch OFF.
b) Select “Data List” mode on SUZUKI scan tool.
c) Observe TP sensor voltage.
4) Turn TP sensor clockwise or counterclockwise and tighten TP
sensor screw at a position where voltage as specified below is
obtained.
TP sensor voltage when lever-to-stop
screw clearance is 3.5 mm (0.14 in.) : 0.98 – 1.02 V
Tightening Torque
(a): 2.0 N
.m (0.20 kg-m, 1.5 lb-ft)
5) Install ECM and connect couplers securely.
INTAKE AIR TEMPERATURE SENSOR (IAT SENSOR)
REMOVAL
1) Disconnect battery negative cable at battery.
2) Disconnect coupler from IAT sensor.
3) Remove IAT sensor and gasket from air cleaner case.

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)

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-27
1) Connect scan tool to DLC with ignition switch OFF, if it is avail-
able.
2) Warm up engine to normal operating temperature.
3) Select “Data List” mode on scan tool to check “IAC duty”.
4) Apply load to engine as described below and check that idle
speed is kept at specified level and “IAC duty” increases as spe-
cified below. At the same time, check that plunger of ISC actua-
tor moves.
Increase of ISC duty
when headlight turns ON : About 3.5%
when A / C is operating : About 10%
5) Stop engine and leave it as it is till it cools off. Then check that
plunger of ISC actuator moves when ignition switch is turned
from OFF to ON once.
If abnormality is found in Steps 4) and 5), check ISC relay, ISC
actuator, ISC electric circuit and closed throttle position switch
signal.
If abnormality is found in Step 4) only, check A/C signal circuit
or power steering pressure switch signal circuit first.
ISC ACTUATOR
NOTE:
As ISC actuator has been preadjusted precisely at factory, it must
not be taken out of throttle body or disassembled.
INSPECTION
1) Disconnect connector from ISC actuator.
2) Check whether ISC actuator coil is open or short.
ISC actuator resistance at 20C (68F): 3 – 50 Ω
NOTE:
Above data should be used as reference value for determin-
ing whether coil is open or short only. ISC actuator resis-
tance may be out of above specified range even when ISC
actuator is normal.

6E1-28 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
1. 1.5 V battery (6.0 V in total)
“A”
“B”
“C”
3) Arrange 4 new 1.5 V batteries in series (6.0 V in total).
With throttle lever in contact with plunger of ISC actuator, con-
nect these batteries to ISC actuator terminals and check ISC ac-
tuator for operation.
CAUTION:

Make sure that connection is made correctly between
batteries and terminals. Also, voltage must not be ap-
plied for longer than 1 second, or a faulty condition will
occur.

Make sure that connection is correct. Connecting to
other terminals may cause damage to closed throttle
position switch (idle switch).

After inspection, be sure to check that CTP switch is
ON. If it is OFF, move ISC actuator again and turn CTP
switch ON.
When positive terminal is
connected to “E” terminal
while plunger is contracted: Plunger expands
When positive terminal is
connected to “D” terminal
while plunger is expanded : Plunger contracts
When an abnormality has been found in above checks 2) and 3),
replace.
CLOSED THROTTLE POSITION (CTP) SWITCH, IDLE
SWITCH (IN ISC ACTUATOR)
INSPECTION
1) Disconnect connector from ISC actuator.
2) Arrange 3 new 1.5 V batteries in series (4.5 V in total) and con-
nect these batteries to CTP switch terminals “A” and “B”.
Check voltage between terminals “B” and “C” under following
each condition.
Throttle lever is in contact with ISC
actuator plunger : 0 – 1 V
Throttle lever is apart from plunger : 3.5 – 5.5 V
If check result is not satisfactory, replace throttle lower body.

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-29
1. ISC actuator relay
2. Relay box
1. EFE heater
2. Rubber cover
3.“Red” wire
4.“Black” wire
ISC ACTUATOR RELAY
INSPECTION
1) Disconnect negative cable at battery.
2) Remove ISC actuator relay from relay box.
3) Structure of ISC actuator relay is the same as that of main relay.
Check its resistance and operation using the same procedure as
that for main relay.
EFE HEATER CONTROL SYSTEM
SYSTEM CIRCUIT 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)
and that parking brake lever is pulled all the way up.
1) Turn up rubber cover of EFE heater to expose terminal-to-wire
connections.
2) Connect voltmeter to EFE terminals and check for voltage under
each condition given below.
CONDITION
VOLTAGE
Fast idle condition
Coolant temp.: below 80C (176F)
Engine speed: over 750 r/min.Battery
voltage
After warming up (other than above)No voltage
If check results are not as specified in above table, check EFE
heater, relay and wire harness.
3) Cover EFE heater connections with rubber cover.
EFE HEATER
CAUTION:
Do not bend wire harness of EFE heater excessively.
ON-VEHICLE INSPECTION
1) Disconnect EFE heater coupler.
2) Check resistance of EFE heater.
If it is not as specified below, replace.
EFE heater resistance: 0.5 – 3.0 Ω at 20C (68F)
3) Connect EFE heater coupler securely.
REMOVAL
1) Remove throttle body according to procedure described pre-
viously.
In this case, however, it is not necessary to disconnect fuel
hoses and engine cooling water hoses from throttle body.
2) Disconnect EFE heater coupler.
3) Remove EFE heater from intake manifold.

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.