Stop screw SUZUKI SWIFT 2000 1.G SF310 Service Workshop Manual

6-36 ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10)
CONNECTOR “C01”
TER-
MINALWIRE
COLORCIRCUITSTANDARD
VOLTAGECONDITION
1LgPower source for sensor4.75 – 5.25 VIgnition switch ON
2OrCamshaft position sensor (+)——
3W/BCrankshaft position sensor
(+)——
4Gr / GClosed throttle position switch
0 – 1 V
Ignition switch ON, ISC actuator
plunger is in contact with throttle lever
screw
4Gr / G(In ISC actuator)
4 – 6 V
Ignition switch ON
Plunger is apart from throttle lever
screw
5Lg / RManifold absolute pressure
sensor3.3 – 4.0 V
Ignition switch ON
Barometric pressure: 100 kPa,
760 mmHg
6Lg / WThrottle position sensor
0.2 – 1.0 V
Ignition switch ON, when clearance
between throttle lever and throttle stop
screw is less than 0.35 mm (0.014 in.)
2.8 – 4.8 VIgnition switch ON
Throttle valve at full open position
7Gr / WEngine coolant temp. sensor0.55 – 0.95 VIgnition switch ON
Engine coolant temp.: 80C (176F)
8P/BHeater of H02S-110 – 14 VIgnition switch ON
9GGround for sensors——
10WCamshaft position sensor (–)——
11W/RCrankshaft position sensor
(+)——
12W/BEFE heater monitor0 – 1 VHeater relay OFF12W/BEFE heater monitor10 – 14 VHeater relay ON
13RHeated oxygen sensor-1Refer to DTC flow chart
14GrIntake air temp. sensor2.0 – 2.7 V
Ignition switch ON
Sensor ambient temp.
(Intake air temp): 20C (68F)
10 – 14 VIgnition switch ON
15Bl / WPower steering pressure
switch (If equipped)
0 – 1 V
With engine running at idle speed,
turning steering wheel to the right or left
as far as it stops, repeating it a few
times
16B/YEngine start switch6 – 12 VWhile engine cranking16B/Yg
(Engine start signal)0 – 1 VOther than above

ENGINE GENERAL INFORMATION AND DIAGNOSIS (TBI FOR G10) 6-53
Fig. 1 for Step 2 Fig. 2 for Step 2
Fig. 3 for Step 3
Closed
(condition “A”)Fully open
Throttle Opening
Condition “A”
Clearance between throttle lever and
throttle stop screw is less than 0.35 mm
(0.014 in.).
clearance
“1”“3”“4”
INSPECTION
STEPACTIONYESNO
1Was “ENGINE DIAG. FLOW TABLE” performed?Go to Step 2.Go to “ENGINE
DIAG. FLOW
TABLE”.
2Check TP Sensor and Its Circuit.
1) Turn ignition switch OFF and connect SUZUKI scan tool to
DLC.
2) Turn ignition switch ON and check TP sensor output
voltage when throttle valve is at idle position and fully
opened. See Fig. 1 and 2.
Dose voltage vary within specified value linearly as shown in
figure?If voltmeter was
used, check
terminal C01-6 for
poor connection.
If OK, substitute a
known-good ECM
(PCM) and
recheck.Go to Step 3.
3Check TP Sensor.
1) Turn ignition switch OFF.
2) Disconnect TP sensor connector.
3) Check for proper connection to TP sensor at each terminal.
4) If OK, then measure resistance between terminals and
check if each measured value is as specified below.
See Fig. 3.
Between 1 and 4: 2.87 – 5.33 kΩ
Between 1 and 3: 100 Ω – 20 kΩ, varying according to
throttle valve opening.
Are measured values as specified?High resistance in
“Lg”, “Lg / W” or
“G” circuit.
If wire and
connection are
OK, substitute a
known-good ECM
(PCM) and
recheck.Replace TP
sensor.

3 / 4 turn
ENGINE MECHANICAL (G10, 1-CAM 6-VALVES ENGINE) 6A-3
3) Install special tool (Oil pressure gauge) to vacated threaded
hole.
Special Tool
(A): 09915-77311
(B): 09915-78211
NOTE:
At this time, be very careful not to exert force to where
heated oxygen sensor and its lead wire are connected.
4) Reinstall oil filter.
5) Start engine and warm it up to normal operating temperature.
6) After warming up, raise engine speed to 4,000 r / min and mea-
sure oil pressure.
Oil pressure specifications: 270 – 370 kPa
(2.7 – 3.7 kg / cm
2,
38.4 – 52.6 psi) at
4,000 r / min (rpm)
7) After checking oil pressure, stop engine and remove oil filter
and oil pressure gauge.
8) Before reinstalling oil pressure switch (1), be sure to wrap its
screw threads with a sealing tape and tighten switch to speci-
fied torque.
NOTE:
If sealing tape edge is bulged out from screw threads of
switch, cut it off.
Tightening Torque
(a): 14 N
.m (1.4 kg-m, 10.5 lb-ft)
9) After oiling oil filter “O” ring (rubber gasket), screw oil filter on
oil filter stand by hand until filter “O” ring contacts mounting sur-
face.
CAUTION:
To tighten oil filter properly, it is important to accurately
identify the position where filter “O” ring first contacts
mounting surface.
10) Tighten filter (1) 3 / 4 (270) turn from the point of contact with
mounting surface using an oil filter wrench.
Special Tool
(C): 09915-47310
CAUTION:
To prevent oil leakage, make sure that oil filter is tight,
but do not overtighten it.
11) After installing oil filter, start engine and check oil filter for oil
leakage.

6E1-8 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
ON-VEHICLE SERVICE
GENERAL
When the hoses have been disconnected and system’s component
removed for service, be sure to reinstall component properly, and
route and connect hoses correctly after service. Refer to Emission
Control Information Label for proper connection of hoses (if
equipped).
ACCELERATOR CABLE ADJUSTMENT
1) Confirm that ambient temperature is higher than 0C, 32F.
2) Warm up engine to normal operating temperature with all elec-
tric loads OFF and stop engine.
3) Confirm that clearance “c” between throttle lever (1) and stop
screw (2) is less than about 1 mm (0.04 in.).
4) Check accelerator cable for play.
Accelerator cable play “a”: 10 – 15 mm (0.4 – 0.6 in.)
Cable play should be within specification. If out of specification,
loosen accelerator cable lock nut and adjust by turning adjusting
nut (3). Be sure to tighten lock nut (4) securely after adjustment.
5) With accelerator pedal depressed fully, check clearance be-
tween throttle lever and lever stopper (5) (throttle body) which
should be within following specification.
Clearance “b”: 0.5 – 2.0 mm (0.02 – 0.07 in.)
(With pedal depressed fully)
If measured value is out of specification, adjust it to specification
by changing height of pedal stopper bolt (6).
IDLE SPEED INSPECTION
Before inspecting idle speed, make sure to the following.

Lead wires and hoses of Electronic Fuel Injection and engine
emission control systems are connected securely.

After warming up engine, accelerator cable has some play, that
is, it is not tight.

Ignition timing is within specification.

All of electrical loads except ignition are switched off.

Air cleaner has been properly installed and is in good condition.

Malfunction indicator lamp does not light when engine running.
After above items are all confirmed, check idle speed as follows.

6E1-12 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
1. Fuel injector wire
2. Fuel injector
3. Upper O-ring
4. Lower O-ring
5. Throttle upper body
6. Gasket
7. Throttle lower body
8. ISC actuator
9. TP sensor
10. Injector sub wire coupler
11. O-ring
12. Injector wire cover
CAUTION:
As throttle stop screw and throttle lever screw are fac-
tory adjusted precisely, don’t remove or adjust them.
Throttle
stop
screw
Throttle lever
screwPositive
terminal Negative
terminal
Viewed from “A”
1. Throttle body
2. Vacuum nozzle
1. Injector coupler
2. TP sensor
3. Water hose
4. Vacuum hose
5. ISC actuator
6. Fuel return hose
7. Fuel feed hose
THROTTLE BODY
ON-VEHICLE INSPECTION

Check that throttle valve lever moves smoothly.

Vacuum passage inspection.
With fingers placed against vacuum nozzle, increase engine
speed a little and check that vacuum is applied.
REMOVAL
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) Drain cooling system.
5) Disconnect following wire harness couplers:

TP sensor

Fuel injector

ISC actuator
6) Disconnect following hoses from throttle body.

Fuel feed and return hoses

Engine cooling water hoses

Vacuum hoses
7) Disconnect accelerator cable from throttle valve lever and cable
bracket.
8) Remove throttle body from intake manifold.

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.

ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13) 6E2-15
CAUTION:
Do not disassemble IAC
valve. Disassembly spoils
its original performanceCAUTION:
Do not remove or adjust
throttle stop screw as it is
factory adjusted precisely
1. Throttle body
2. Throttle stop screw
3. TP sensor
4. O-ring
5. Idle air control valve
6. IAC valve screws : Tightening torque
: Do not reuse
AIR INTAKE SYSTEM
THROTTLE BODY
On-Vehicle Inspection

Check that throttle valve lever (1) moves smoothly.
Removal
1) Disconnect negative cable at battery.
2) Drain cooling system.
3) Disconnect accelerator cable (1) from throttle body.
4) Disconnect air cleaner outlet hose (1) from throttle body.