check engine SUZUKI SWIFT 2000 1.G SF310 Service Workshop Manual

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-31
1. RFC relay
2. Relay box
RADIATOR FAN CONTROL RELAY (RFC RELAY)
INSPECTION
1) Disconnect negative cable at battery.
2) Remove RFC relay from relay box.
3) Structure of RFC 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
INSPECTION
1) Disconnect negative cable at battery.
2) Disconnect radiator fan motor connector.
3) Connect battery to the motor and check for operation.
If fan fails to operate, replace.

6E1-32 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
RH
LH
EMISSION CONTROL SYSTEM
EVAPORATIVE EMISSION CONTROL SYSTEM
EVAP CANISTER PURGE 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) Disconnect purge hose from EVAP canister.
2) Place finger against the end of disconnected hose and check
that vacuum is not felt there when engine is cool and running at
idle speed.
3) Connect purge hose to EVAP canister and warm up engine to
normal operating temperature.
4) Disconnect purge hose from EVAP canister.
5) Also check that vacuum is felt when engine is running at idle
speed.
NOTE:
The EVAP canister purge system does not perform purging
(vacuum is not detected at the purge hose) unless the en-
gine is sufficiently warmed up and the heated oxygen sen-
sor is activated fully. Also, when the purge hose is discon-
nected in Step 4), the air is drawn into the purge line. As a
result, ECM detects a change in the purge gas concentra-
tion and sometimes stops purging but this indicates noth-
ing abnormal.
If check result is not satisfactory, check vacuum passage, hoses,
EVAP canister purge valve, wire harness and ECM.
VACUUM PASSAGE INSPECTION
Start engine end run it at idle speed. Disconnect vacuum hose from
EVAP canister purge valve. With finger placed against hose discon-
nected, check that vacuum is applied.
If it is not applied, clean vacuum passage by blowing compressed
air.
VACUUM HOSE INSPECTION
Check hoses for connection, leakage, clog and deterioration. Re-
place as necessary.

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-33
EVAP CANISTER PURGE VALVE INSPECTION
WARNING:
Do not suck the air through valve. Fuel vapor inside valve
is harmful.
1) With the ignition switch OFF position, disconnect coupler from
EVAP canister purge valve.
2) Check resistance between two terminals of EVAP canister
purge valve.
Resistance of EVAP canister purge valve:
33 – 39 Ω at 20C (68F)
If resistance is as specified, proceed to next operation check.
If not, replace.
3) Disconnect vacuum hoses from intake manifold and its pipe.
4) With coupler disconnected, blow into pipe “A”. Air should not
come out of pipe “B”.
5) Connect 12 V-battery to EVAP canister purge valve terminals.
In this state, blow pipe “A”.
Air should come out of pipe “B”.
If check result is not as described, replace canister purge valve.
6) Connect vacuum hoses.
7) Connect EVAP canister purge valve coupler securely.

6E1-34 ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10)
1. Tank pipe
2. Purge pipe
3. Air pipe
4. Blow air
1. Tank pressure
control valve
2. Orange side3. Black side
4. To canister
5. From fuel tank
EVAP CANISTER INSPECTION
WARNING:
DO NOT SUCK nozzles on EVAP canister. Fuel vapor inside
EVAP canister is harmful.
1) Disconnect vacuum hoses from EVAP canister and remove
EVAP canister.
2) When air is blown into tank pipe, there should be no restriction
of flow through purge pipe and air pipe.
If operation differs from above description, EVAP canister must
be replaced.
3) Install EVAP canister and connect hoses to canister.
TANK PRESSURE CONTROL VALVE INSPECTION
WARNING:
DO NOT SUCK air through tank pressure control valve.
Fuel vapor inside the valve is harmful.
1) Remove tank pressure control valve.
2) Air should pass through valve smoothly from fuel tank side
(black side of tank pressure control valve) to orange side when
blown hard.
3) From orange side, even when blown softly, air should come out
of black side.
4) If air doesn’t pass though valve in step 2) or hard blow is required
in step 3), replace tank pressure control valve.
5) Install tank pressure control valve.
NOTE:
When connecting tank pressure control valve between
hoses, refer to figure at the left for installing direction.
PCV SYSTEM
NOTE:
Be sure to check that there is no obstruction in PCV valve or
its hoses before adjusting engine idle speed, for obstructed
PCV valve or hose hampers its accurate adjustment.
PCV HOSE INSPECTION
Check hoses for connection, leakage, clog and deterioration.
Replace as necessary.

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-35
1. PCV valve
1. Proper size hose
2. Blow air
3. PCV valve
PCV VALVE INSPECTION
1) Disconnect PCV hose from PCV valve.
2) Run engine at idle.
3) Place your finger over end of PCV valve to check for vacuum.
If there is no vacuum, check for clogged valve. Replace as nec-
essary.
4) After checking vacuum, stop engine and check PCV valve for
sticking.
With engine stopped, connect a new hose to PCV valve for in-
spection.
Blow air into the hose and check that air flows with difficulty from
cylinder head side to intake manifold side.
If air flows without difficulty, valve is stuck in “Open” position. Re-
place PCV valve.
WARNING:
Do not suck air through PCV valve. Petroleum substances
inside the valve and fuel vapor inside the intake manifold
are harmful.
5) After removing the hose, connect PCV hose and clamp securely.

1. Accelerator cable
3. Lock nut
ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13) 6E2-13
ON-VEHICLE SERVICE
ACCELERATOR CABLE ADJUSTMENT
1) With throttle valve closed, check accelerator pedal play which
should be within following specification.
Pedal play “a”: 2 – 7 mm (0.08 – 0.27 in.)
If measured value is out of specification, adjust it to specification
with cable adjusting nut (2).
2) With accelerator pedal depressed fully (1), check clearance be-
tween throttle lever (2) and lever stopper (3) (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
with cable adjusting nut.

6E2-14 ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13)
IDLE SPEED / IDLE AIR CONTROL (IAC) DUTY
INSPECTION
Before idle speed / IAC duty check, make sure of the following.

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

Accelerator cable has some play, that is, it is not tight.

Valve lash is checked and adjusted according to maintenance
schedule.

Ignition timing is within specification.

All accessories (wipers, heater, lights, A / C, etc.) are out of ser-
vice.

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

No abnormal air inhaling from air intake system.
After above items are all confirmed, check idle speed and IAC duty
as follows.
NOTE:
Before starting engine, place transmission gear shift lever in
“Neutral” (shift selector lever to “P” range for A / T vehicle),
and set parking brake and block drive wheels.
1) Connect SUZUKI scan tool (1) to DLC with ignition switch OFF,
if it is available.
2) Warm up engine to normal operating temperature.
3) Check engine idle speed and “IAC duty” as follow:
Select “Data List” mode on scan tool to check “IAC duty” and en-
gine speed.
Special Tool
(A): 09931-76011 (SUZUKI scan tool)
(B): Mass storage cartridge
(C): 09931-76030 (16 / 14 pin DLC cable)
If duty and/or idle speed is out of specifications, inspect idle air
control system referring to Diagnostic Flow Table B-4 IDLE AIR
CONTROL SYSTEM CHECK in Section 6.
ENGINE IDLE SPEED AND IAC DUTY
A/C OFFA/C ON
M / T vehicle750±50 r / min (rpm)875±50 r/minA / T vehicle
at P/N range750 ±50 r/min (rpm)
8 – 25 or *8 – 35%
875 ±50 r/min
(rpm)
NOTE:
Duty values with (*) are applicable to vehicle used at high
altitude (higher than 2,000 m or 6,560 ft).
4) Check that 875 ± 50 r / min. idle speed is obtained with lighting
switch ON and heater blower switch in 2 – 4 position.
If not, check “Electric load (+)” circuit and “Heater blower switch
signal” circuit referring to “ELECTRONIC CONTROL SYSTEM”
in this section and idle air control system.
5) Check that specified engine idle speed is obtained with A / C ON
if vehicle is equipped with A / C.
If not, check A / C ON signal circuit.

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.

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.