idle SUZUKI SWIFT 2000 1.G SF310 Service Workshop Manual

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.

6E1-32 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.

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.

6E2
ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13) 6E2-1
GENERAL DESCRIPTION6E2- 2 . . . . . . . . . . . . . .
AIR INTAKE SYSTEM 6E2- 6. . . . . . . . . . . . . . . . . .
FUEL DELIVERY SYSTEM 6E2- 7. . . . . . . . . . . . . .
ELECTRONIC CONTROL SYSTEM 6E2- 8. . . . . .
Engine and Emission Control Input /
Output Table 6E2- 9. . . . . . . . . . . . . . . . . . . . . . . .
DIAGNOSISSee Section 6. . . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE6E2-13 . . . . . . . . . . . . . . . .
Accelerator Cable Adjustment 6E2-13. . . . . . . . . .
Idle Speed/Idle Air Control (IAC)
Duty Inspection 6E2-14. . . . . . . . . . . . . . . . . . . . .
AIR INTAKE SYSTEM 6E2-15. . . . . . . . . . . . . . . . . .
Throttle Body 6E2-15. . . . . . . . . . . . . . . . . . . . . . . .
Idle Air Control Valve 6E2-17. . . . . . . . . . . . . . . . .
FUEL DELIVERY SYSTEM 6E2-18. . . . . . . . . . . . . .
Fuel Pressure Inspection 6E2-18. . . . . . . . . . . . . .
Fuel Pump 6E2-21. . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Pressure Regulator 6E2-22. . . . . . . . . . . . . . .
Fuel Injector 6E2-23. . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRONIC CONTROL SYSTEM 6E2-27. . . . . .
ECM / PCM 6E2-27. . . . . . . . . . . . . . . . . . . . . . . . . .
MAP Sensor 6E2-27. . . . . . . . . . . . . . . . . . . . . . . . .
TP Sensor 6E2-28. . . . . . . . . . . . . . . . . . . . . . . . . . .
IAT Sensor 6E2-29. . . . . . . . . . . . . . . . . . . . . . . . . .
ECT Sensor 6E2-30. . . . . . . . . . . . . . . . . . . . . . . . . Heated Oxygen Sensor -1 and -2 6E2-31. . . . . . .
Camshaft Position Sensor 6E2-32. . . . . . . . . . . . .
Crankshaft Position Sensor 6E2-32. . . . . . . . . . . .
Vehicle Speed Sensor 6E2-33. . . . . . . . . . . . . . . . .
Fuel Level Sensor (gauge) 6E2-33. . . . . . . . . . . . .
Main Relay, Fuel Pump Relay and
Radiator Fan Control Relay 6E2-33. . . . . . . . . . .
Fuel Cut Operation (Inspection) 6E2-34. . . . . . . .
Radiator Fan Control System 6E2-34. . . . . . . . . .
System Inspection 6E2-34. . . . . . . . . . . . . . . . . .
Radiator Fan 6E2-34. . . . . . . . . . . . . . . . . . . . . . .
EMISSION CONTROL SYSTEM 6E2-35. . . . . . . . .
EGR System 6E2-35. . . . . . . . . . . . . . . . . . . . . . . . .
EVAP Control System 6E2-36. . . . . . . . . . . . . . . . .
EVAP Canister Purge Inspection 6E2-36. . . . . .
Vacuum Passage Inspection 6E2-37. . . . . . . . .
Vacuum Hose Inspection 6E2-37. . . . . . . . . . . .
EVAP Canister Purge Valve
Inspection 6E2-37. . . . . . . . . . . . . . . . . . . . . . . .
EVAP Canister Inspection 6E2-38. . . . . . . . . . .
PCV System 6E2-38. . . . . . . . . . . . . . . . . . . . . . . . .
PCV Hose Inspection 6E2-38. . . . . . . . . . . . . . .
PCV Valve Inspection 6E2-38. . . . . . . . . . . . . . .
SPECIAL TOOLS6E2-39 . . . . . . . . . . . . . . . . . . . . . .
TIGHTENING TORQUE
SPECIFICATIONS6E2-39 . . . . . . . . . . . . . . . . . . . . .
SECTION 6E2
ENGINE AND EMISSION CONTROL SYSTEM
(SFI FOR G13)
WARNING:
For vehicles equipped with Supplemental Restraint (Air Bag) System:

Service on and around the air bag system components or wiring must be performed only by an autho-
rized SUZUKI dealer. Refer to “Air Bag System Components and Wiring Location View” under “Gener-
al Description” in air bag system section in order to confirm whether you are performing service on
or near the air bag system components or wiring. Please observe all WARNINGS and “Service Precau-
tions” under “On-Vehicle Service” in air bag system section before performing service on or around
the air bag system components or wiring. Failure to follow WARNINGS could result in unintentional
activation of the system or could render the system inoperative. Either of these two conditions may
result in severe injury.

Technical service work must be started at least 90 seconds after the ignition switch is turned to the
“LOCK” position and the negative cable is disconnected from the battery. Otherwise, the system may
be activated by reserve energy in the Sensing and Diagnostic Module (SDM).
CONTENTS

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

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

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.

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.