Iac SUZUKI SWIFT 2000 1.G SF310 Service Owner's Manual

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.

6E2-16 ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13)
1
2
5) Disconnect electric coupler from TP sensor (2) and IAC valve
(3).
6) Remove throttle body from intake manifold.
7) Disconnect engine coolant hoses (1) from throttle body.
Disassembly
NOTE:
While disassembling and assembling throttle body, use spe-
cial care not to deform levers on throttle valve shaft or cause
damage to any other parts.
1) Remove TP sensor and IAC valve from throttle body.
Cleaning
Clean throttle body bore (1) and idle air passage (2) by blowing
compressed air.
NOTE:
TP sensor, idle air control valve or other components contain-
ing rubber must not be placed in a solvent or cleaner bath. A
chemical reaction will cause these parts to swell, harden or get
distorted.
Reassembly
1) Install IAC valve to throttle body referring to “IAC valve Installa-
tion” section.
2) Install TP sensor to throttle body referring to “TP sensor Installa-
tion” section.
Installation
1) Clean mating surfaces and install throttle body gasket to intake
manifold.
Use new gasket.

21
ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13) 6E2-17
2) Connect engine coolant hoses (1).
3) Install throttle body (4) to intake manifold.
4) Connect coupler to TP sensor (2) and IAC valve (3) securely.
5) Install air cleaner outlet hose (1) and pipe.
6) Connect accelerator cable and adjust cable play to specifica-
tion.
7) Refill cooling system.
8) Connect negative cable at battery.
IDLE AIR CONTROL VALVE (IAC VALVE)
Removal
1) Remove throttle body from intake manifold referring to “Throttle
Body Removal” section.
2) Remove IAC valve from throttle body.
Inspection
1) Connect each connector to IAC valve (1), TP sensor and IAT
sensor.
2) Check that rotary valve (2) of lAC valve opens and closes once
and then stops in about 60 ms as soon as ignition switch is
turned ON.
NOTE:

This check should be performed by two people, one per-
son turns on ignition switch while the other checks valve
operation.

As valve operation is momentary, it may be overlooked.
To prevent this, perform this operation check 3 times or
more continuously.
If rotary valve of lAC valve does not operate at all, check
wire harness for open and short. If wire harness is in good
condition, replace lAC valve and recheck.

3. Fuel return pipe
6E2-18 ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13)
Installation
1) Install new O-ring (2) to IAC valve (1).
2) Install IAC valve (1) to throttle body (3).
Tighten IAC valve screws to specified torque.
Tightening Torque
(a): 3.3 N
.m (0.33 kg-m, 2.5 lb-ft)
3) Install throttle body to intake manifold referring to “Throttle Body
Installation” section.
FUEL DELIVERY SYSTEM
FUEL PRESSURE INSPECTION
WARNING:
Be sure to perform work in a well-ventilated area and away
from any open flames, or there is a risk of a fire breaking out.
1) Relieve fuel pressure in fuel feed line referring to “Fuel Pressure
Relief Procedure” in Section 6.
2) Disconnect fuel feed hose from fuel delivery pipe.
CAUTION:
A small amount of fuel may be released when fuel hose
is disconnected. Place container under the joint with a
shop cloth so that released fuel is caught in container or
absorbed in cloth. Place that cloth in an approved con-
tainer.
3) Connect special tools and hose between fuel delivery pipe (1)
and fuel feed hose (2) as shown in figure, and clamp hoses se-
curely to ensure no leaks occur during checking.
Special Tool
(A): 09912-58441
(B): 09912-58431
(C): 09912-58490
4) Check that battery voltage is above 11 V.

6E2-38 ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13)
EVAP Canister Inspection
WARNING:
DO NOT SUCK nozzles on EVAP canister. Fuel vapor inside
EVAP canister is harmful.
1) Check outside of EVAP canister visually.
2) Disconnect vacuum hoses from EVAP canister.
3) Check that there should be no restriction of flow through purge
pipe (2) and air pipe (3) when air is blown (4) into tank pipe (1).
If any faulty condition is found in above inspection replace.
PCV SYSTEM
NOTE:
Be sure to check that there is no obstruction in PCV valve or
its hoses before checking IAC duty, for obstructed PCV valve
or hose hampers its accurate adjustment.
PCV Hose Inspection
Check hoses for connection, leakage, clog and deterioration.
Replace as necessary.
PCV Valve Inspection
1) Disconnect PCV valve (1) from cylinder head cover and install
plug to head cover hole.
2) Run engine at idle.
3) Place your finger over end of PCV valve (1) to check for vacuum.
If there is no vacuum, check for clogged valve. Replace as nec-
essary.
4) After checking vacuum, stop engine and remove PCV valve (1).
Shake valve and listen for the rattle of check needle inside the
valve. If valve does not the rattle, replace valve.
5) After checking, remove plug and install PCV valve (1).

ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13) 6E2-39
09930-88530
Injector test lead09931-76011
SUZUKI scan tool (Tech 1A) kit
Mass storage cartridge
09931-76030
16 / 14 pin DLC cable1. Pressure gauge
09912-58441
2. Pressure hose
09912-58431
3. 3-way joint & hose
09912-58490
4. Checking tool set
09912-58421
4-1. Tool body & washer
4-2. Body plug
4-3. Body attachment-1
4-4. Holder
4-5. Return hose & clamp
4-6. Body attachment-2 & washer
4-7. Hose attachment-1
4-8. Hose attachment-2
1. Storage case
2. Operator’s manual
3. Tech 1A
4. DLC cable (14 / 26 pin,
09931-76040)
5. Test lead / probe
6. Power source cable
7. DLC cable adaptor
8. Self-test adaptor
SPECIAL TOOLS
TIGHTENING TORQUE SPECIFICATIONS
FasteningpartsTightening torqueFastening artsN.mkg-mlb-ft
TP sensor mounting screw20.21.5
IAC valve3.30.332.5
ECT sensor121.29.0
Heated oxygen sensor-1 and -2454.532.5
Camshaft position sensor90.96.5