Isc SUZUKI SWIFT 2000 1.G SF310 Service Workshop Manual

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).

6F
IGNITION SYSTEM 6F-1
GENERAL DESCRIPTION6F- 1 . . . . . . . . . . . . . .
DIAGNOSIS6F- 3 . . . . . . . . . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE6F- 5 . . . . . . . . . . . . . . . .
Ignition Spark Test 6F- 5. . . . . . . . . . . . . . . . . . . .
High-Tension Cords 6F- 5. . . . . . . . . . . . . . . . . . .
Spark Plugs 6F- 6. . . . . . . . . . . . . . . . . . . . . . . . .
Noise Suppressor 6F- 6. . . . . . . . . . . . . . . . . . . . Ignition Coil 6F- 7. . . . . . . . . . . . . . . . . . . . . . . . . .
Igniter 6F- 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Distributor 6F- 8. . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Timing 6F- 9. . . . . . . . . . . . . . . . . . . . . . .
Distributor Unit 6F-10. . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOLS6F-11 . . . . . . . . . . . . . . . . . . . . . .
The ignition system used for this vehicle has an elec-
tronic ignition control system and consists of the fol-
lowing parts.

ECM
It detects the engine condition through the signals
from the sensors, determines the most suitable igni-
tion timing and time for electricity to flow to the pri-
mary coil and sends a signal to the power unit.

Power unit (Igniter)
It turns ON and OFF the primary current of the igni-
tion coil according to the signal from ECM.

Ignition coil
When the ignition coil primary current is turned OFF,
a high voltage is induced in the secondary winding.

Distributor
It distributes a high voltage current to each plug.
High-tension cords and spark plugs.

CMP sensor (Camshaft position Sensor)
Located in the distributor, it converts the crank angle
into voltage variation and sends it to ECM. For its
details, refer to Section 6E1.

TP sensor, ECT sensor and MAP sensor
For their details, refer to Section 6E.
In electronic ignition control system, the ECM is pro-
grammed for the best ignition timing under every en-
gine condition. Receiving signals which indicate the
engine condition from the sensors, e.g., engine revo-
lution, intake air pressure, coolant temperature, etc.,
it selects the most suitable ignition timing from its
memory and operates the power unit.
Thus ignition timing is controlled to yield the best en-
gine performance.
For more information, refer to Section 6E1.
SECTION 6F
IGNITION SYSTEM
WARNING:
For vehicles equipped with a Supplemental Inflatable Restraint Air Bag System:

Service on or around Air Bag System Components or Wiring must be performed only by an authorized
Suzuki dealer. Please observe all WARNINGS and SERVICE PRECAUTIONS in Section 9J under “On-
Vehicle Service” and the Air Bag System Component and Wiring Location view in Section 9J before
performing service on or around Air Bag System Components or Wiring. Failure to follow WARNINGS
could result in unintended air bag deployment or could render the air bag inoperative. Either of these
two conditions may result in severe injury.

SDM can maintain sufficient voltage to cause a deployment of air bags for up to 10 seconds after igni-
tion switch is turned to “LOCK” position, battery is disconnected or fuse powering SDM is removed.
Work must be started after 15 seconds from the time.
CONTENTS
GENERAL DESCRIPTION

IGNITION SYSTEM 6F-3
DIAGNOSIS
ConditionPossible CauseCorrection
Engine cranks, but will
not start or hard to start
Blown fuse for ignition coil

Loose connection or disconnection of lead wire or
high-tension cord(s)

Faulty high-tension cord(s)

Faulty spark plug(s)

Cracked rotor or cap

Maladjusted signal rotor air gap

Faulty ignition coil

Faulty noise suppressor

Faulty CMP sensor

Faulty igniter

Faulty ECM (or PCM)

Maladjusted ignition timingReplace
Connect securely
Replace
Adjust, clean or replace
Replace
Adjust
Replace
Replace
Replace
Replace
Replace
Adjust
Poor fuel economy or
engine performance
Incorrect ignition timing

Faulty spark plug(s) or high-tension cord(s)

Faulty ECM (or PCM)Adjust
Adjust, clean or replace
Replace
DIAGNOSTIC FLOW TABLE
STEPACTIONYESNO
1Was “Engine Diagnostic Flow Table” in SECTION 6
performed?Go to Step 2.Go to “Engine
Diagnostic Flow
Table” in SECTION 6.
2Ignition Spark Test
1) Check all spark plug for condition and type,
referring to “Spark Plugs” in this section.
2) If OK, perform ignition spark test, referring to
“Ignition Spark Check” in this section.
Is spark emitted from all spark plugs?Go to Step 11 on the
next page.Go to Step 3.
3Diagnostic Trouble Code (DTC) Check
1) Check DTC stored in ECM (or PCM), referring to
“Diagnostic Trouble Code (DTC) Check” in
SECTION 6.
Is DTC stored?Go to applicable flow
table corresponding to
that code No. in
SECTION 6.Go to Step 4.
4Electrical Connection and Noise Suppressor Check
1) Check ignition coil for electrical connection and
noise suppressor for conductivity.
Are they good condition?Go to Step 5.Repair or replace.
5High-tension Cord Check
1) Check high-tension cord for resistance, referring
to “High-tension Cords” in this section.
Is check result satisfactory?Go to Step 6.Replace high-tension
cord(s).

1. Injector coupler
2. Throttle body
3. Air cleaner case
4. Cylinder head cover
1. High-tension code 2. Cap
1. High-tension
cord
2. Ohmmeter
IGNITION SYSTEM 6F-5
ON-VEHICLE SERVICE
IGNITION SPARK TEST
1) Disconnect injector coupler at throttle body side.
WARNING:
Without disconnection of injector coupler, combustible gas
may come out from spark plug holes during this test and
may get ignited in engine room.
2) Remove spark plugs and connect them to high-tension cords,
and then ground spark plugs.
3) Crank engine and check if each spark plug sparks.
4) If no spark is emitted, inspect high-tension cords, spark plugs,
ignition coil, distributor, etc.
HIGH-TENSION CORDS
1) Remove high-tension cord at ignition coil while gripping its cap.
2) Remove distributor cap installed with high-tension cords.
3) Remove high-tension cord clamp from cylinder head cover.
4) Pull out high-tension cords from spark plugs while gripping each
cap.
CAUTION:

Removal of high-tension cords together with clamps
will be recommended so as not to damage their inside
wire (resistive conductor).

For the same reason, pull out each connection by grip-
ping cap portion.
5) Measure resistance of high-tension cord by using ohmmeter.
High-tension cord resistance: 10 – 22 kΩ/ m (3.0 – 6.7 kΩ/ft)

6F-6 IGNITION SYSTEM
6) If resistance exceeds specification, inspect distributor terminal
and replace high-tension cord(s) and/or distributor cap as re-
quired.
CAUTION:

Never attempt to use metal conductor high-tension cords
as replacing parts.

Insert each cap portion fully when installing high-tension
cords.
SPARK PLUGS
1) Pull out high-tension cords by gripping their caps and then re-
move spark plugs.
2) Inspect them for:

Electrode wear

Carbon deposits

Insulator damage
3) If any abnormality is found, adjust air gap, clean with spark plug
cleaner or replace them with specified new plugs.
Spark plug air gap “a’’: 1.0 – 1.1 mm (0.039 – 0.043 in.)
Spark plug type : NGK BPR6ES-11
: DENSO W20EPR-U11
4) Install spark plugs and torque them to specification.
Tightening Torque for spark plug
25 N
.m (2.5 kg-m, 18.0 lb-ft)
5) Install high-tension cords securely by gripping their caps.
NOISE SUPPRESSOR
REMOVAL
1) Unwrap tape from noise suppressor.
2) Disconnect coupler of noise suppressor.
3) Remove noise suppressor.
INSTALLATION
Reverse removal procedure for installation.
INSPECTION
Using an ohmmeter (1) to check continuity as the following.
“a” – “b”: No continuity
“a” – “c”: No continuity
“c” – “d”: Continuity (Approx. 2.2 kΩ)
If check result is not satisfactory, replace noise suppressor (2).

PRIMARY
SECONDARY
1. Ohmmeter
IGNITION SYSTEM 6F-7
IGNITION COIL
1) Pull out high-tension cord by gripping its cap.
2) Disconnect ignition coil coupler.
3) Measure primary and secondary coil resistances.
Ignition coil resistance (at 20C, 68F)
Primary : 0.87 – 1.05 Ω
Secondary : 11.2 – 15.2 kΩ
4) If resistance is out of specification, replace coil with new one.
IGNITER
Before this inspection, prepare 5 V power supply (3 new 1.5 V bat-
teries), one 12 V 3.4 W light bulb and one 12 V battery (fully
charged).
1) Disconnect igniter coupler (1).
2) Remove igniter (2) from its bracket.
3) Arrange 3 new batteries in series (1) (check total voltage is about
4.7 V).
4) Connect light bulb (2) between “c” terminal of igniter (3) and bat-
tery (4) positive (+) terminal, then connect battery negative (–)
terminal to igniter body.
Also connect battery positive (+) terminal and “b” terminal of ig-
niter.
Check that the light bulb does not illuminate.
5) Connect negative (–) terminal of batteries (1) and igniter body.
Check that the light bulb illuminate when positive (+) terminal of
batteries (1) is connected to “a” terminal of igniter.
If inspection result is not satisfactory, replace igniter.
6) Install igniter and connect igniter coupler.

1. Pickup coil
2. Signal rotor
3. Screws
1. Distributor
2. Coupler
3. Ohmmeter
6F-8 IGNITION SYSTEM
DISTRIBUTOR
DISTRIBUTOR CAP AND ROTOR
INSPECTION
Check cap and rotor for crack and their terminals for corrosion and
wear. Replace as necessary.
SIGNAL ROTOR AIR GAP
INSPECTION
1) Remove distributor cap and rotor.
2) Using thickness gauge, measure air gap, between signal rotor
tooth and CMP sensor (generator).
Signal rotor air gap “a”: About 0.2 mm (about 0.008 in.)
3) If gap is out of specification, loose CMP sensor (signal genera-
tor) securing screws. Using blade (–) screw driver, move CMP
sensor (generator) and adjust gap to specification. After adjust-
ment, tighten securing screws and recheck gap.
NOTE:
Check to make sure that CMP sensor (signal generator)
tooth is free from any metal particles.
4) Install distributor cap and rotor.
CMP SENSOR (PICKUP COIL) RESISTANCE
INSPECTION
1) Disconnect distributor lead coupler.
2) Measure resistance of pickup coil by using ohmmeter.
3) If resistance is out of specification, replace CMP sensor (signal
generator) as follows.
Pickup coil resistance:
185 – 275 Ω at – 10C (14F) – 50C (122F)
240 – 325 Ω at 50C (122F) – 100C (212F)
4) Remove distributor cap and rotor.
5) Remove CMP sensor (signal generator) securing screws and
lead wire clamp screws.
6) Replace CMP sensor (signal generator).
7) Adjust signal rotor air gap to specifications as previously out-
lined.
8) Install rotor, distributor cap seal and cap.

1. Crankshaft pulley
2. Water pump pulley
A: To be advanced
B: To be retarded
1. Distributor flange bolt
2. Distributor
IGNITION SYSTEM 6F-9
IGNITION TIMING
NOTE:
Before starting engine, place transmission gear shift lever in
“Neutral” (shift selector lever to “P” range for A/T model), and
set parking brake.
INSPECTION AND ADJUSTMENT
1) Connect SUZUKI scan tool (1) to DLC (2) with ignition switch
OFF.
2) Start engine and warm it up to normal operating temperature.
3) Make sure that all of electrical loads except ignition are
switched off.
4) Check to be sure that idle speed is within specification.
(Refer to SECTION 6E1)
5) Set timing light to No.1 high-tension cord.
6) Fix ignition timing to initial one as follows:
Select “MISC” made on SUZUKI scan tool and fix ignition tim-
ing to initial one.
7) Using timing light, check that timing is within specification.
Initial ignition timing (Ignition timing fixed):
5 ±3 BTDC (at idle speed)
Ignition order: 1-3-2
Special Tool
(A): 09900-27301 or 09930-76420
8) If ignition timing is out of specification, loosen flange bolts, ad-
just timing by turning distributor assembly while engine is run-
ning, and then tighten bolts.
Tightening Torque
(a): 15 N
.m (1.5 kg-m, 11.0 lb-ft)
9) After tightening distributor flange bolts, recheck that ignition
timing is within specification.
10) After checking and/or adjusting Initial Ignition Timing, release
ignition timing fixation by SUZUKI scan tool.
11) With engine idling (ignition timing not fixed, idle switch ON and
car stopped), check that ignition timing is about 10 BTDC.
(Constant variation within a few degrees from 10 indicates no
abnormality but proves operation of electronic timing control
system.) Also, check that increasing engine speed advances
ignition timing.
If above check results are not satisfactory, check CTP switch,
test switch terminal circuit and ECM.

1. Cap
2. Cap seal
3. Cap screw
4. Rotor
5. CMP sensor
(Signal generator)
6. Screw
7. Cover
8. Housing
9. O-ring
A: Slot offset
1. Distributor case
2. O-ring3. Distributor coupling
4. Camshaft
6F-10 IGNITION SYSTEM
DISTRIBUTOR UNIT
DISMOUNTING
1) Disconnect distributor lead coupler.
2) Remove distributor cap screws and cap.
3) Remove distributor flange bolts.
4) Pull out distributor housing assembly.
REMOUNTING
NOTE:

Before installing distributor, check to make sure that its
O-ring is in good condition.

If new O-ring is installed, apply oil.
1) Install distributor without cap to camshaft.
Fit the dogs of distributor coupling into the slots of camshaft,
when installing. The dogs of distributor coupling are offset.
Therefore, if the dogs can not shaft by 180 degree and try again.
2) Lightly install flange bolts and prepare for ignition timing adjust-
ment.
3) Check to make sure that rotor is in good condition.
4) Inspect distributor cap and clean or replace as required.
5) Make sure that distributor cap seal is placed properly and install
cap, and then fasten it with screws.
6) Connect distributor lead coupler.
7) Check and adjust ignition timing as previously outlined.

6F1
IGNITION SYSTEM (SFI FOR G13) 6F1-1
GENERAL DESCRIPTION6F1-2 . . . . . . . . . . . . . .
DIAGNOSIS6F1-3 . . . . . . . . . . . . . . . . . . . . . . . . . . .
ON-VEHICLE SERVICE6F1-5 . . . . . . . . . . . . . . . .
Ignition Spark Test 6F1-5. . . . . . . . . . . . . . . . . . . .
High-Tension Cords 6F1-5. . . . . . . . . . . . . . . . . . . Spark Plugs 6F1-6. . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Coil Assembly 6F1-6. . . . . . . . . . . . . . . . .
Crankshaft Position Sensor 6F1-7. . . . . . . . . . . .
Ignition Timing 6F1-7. . . . . . . . . . . . . . . . . . . . . . .
SPECIAL TOOLS6F1-9 . . . . . . . . . . . . . . . . . . . . . .
SECTION 6F1
IGNITION 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