coil SUZUKI SWIFT 2000 1.G SF310 Service Service Manual

ENGINE AND EMISSION CONTROL SYSTEM (TBI FOR G10) 6E1-27
1) Connect scan tool to DLC with ignition switch OFF, if it is avail-
able.
2) Warm up engine to normal operating temperature.
3) Select “Data List” mode on scan tool to check “IAC duty”.
4) Apply load to engine as described below and check that idle
speed is kept at specified level and “IAC duty” increases as spe-
cified below. At the same time, check that plunger of ISC actua-
tor moves.
Increase of ISC duty
when headlight turns ON : About 3.5%
when A / C is operating : About 10%
5) Stop engine and leave it as it is till it cools off. Then check that
plunger of ISC actuator moves when ignition switch is turned
from OFF to ON once.
If abnormality is found in Steps 4) and 5), check ISC relay, ISC
actuator, ISC electric circuit and closed throttle position switch
signal.
If abnormality is found in Step 4) only, check A/C signal circuit
or power steering pressure switch signal circuit first.
ISC ACTUATOR
NOTE:
As ISC actuator has been preadjusted precisely at factory, it must
not be taken out of throttle body or disassembled.
INSPECTION
1) Disconnect connector from ISC actuator.
2) Check whether ISC actuator coil is open or short.
ISC actuator resistance at 20C (68F): 3 – 50 Ω
NOTE:
Above data should be used as reference value for determin-
ing whether coil is open or short only. ISC actuator resis-
tance may be out of above specified range even when ISC
actuator is normal.

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

ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13) 6E2-9
FUEL PUMP RELAY
FUEL INJECTOR
HO2S HEATER
IAC VALVE
IGNITION COIL WITH IGNITER
EGR VALVE
EVAP CANISTER PURGE VALVE
A/C CONTROL MODULE
RADIATOR FAN RELAY
MIL
MAIN RELAY
SIGNAL FROM SENSOR, SWITCH AND CONTROL MODULE
OUTPUT
INPUT
ENGINE & EMISSION CONTROL INPUT / OUTPUT TABLE
ELECTRIC CONTROL DEVICE
FUEL LEVEL SENSORFor detecting fuel level
BAROMETRIC PRESSURE SENSOR
START SWITCH
IGNITION SWITCH
LIGHTING SWITCH
REAR DEFOGGER SWITCH (IF EQUIPPED)
BLOWER SWITCH
A / C SWITCH
VSS
HEATED OXYGEN SENSOR-1
HEATED OXYGEN SENSOR-2For detecting deterioration of
three way catalytic convertor
IAT SENSOR
ECT SENSOR
TP SENSOR
MAP SENSOR
CMP SENSOR
CKP SENSOR

12 W / R “N”-range signal (A / T)
13 R Heated oxygen sensor-2
14 Y / R “D”-range signal (A / T)
15 R / W “R”-range signal (A / T)
16 Lg / B A / C SW signal
17 R / W EGR valve (stepper motor coil 4)
18 P / G Radiator fan relay
19 Y / Bl Fuel pump relay
20 —— ———
21 W / B “P”-range signal (A / T)
22 P / Bl Fuel level gauge
23 R / B “L”-range signal (A / T)
24 —— ———
1 V Malfunction indicator lamp
Vehicle speed sensor (M / T)
Output shaft speed sensor (+)
(A / T)
3 —— ———
4 G / W Shift solenoid – A (A / T)
5 Gr Throttle position (TP) sensor
6 B / W Ignition switch signal
7 Y / B Data link connector
Output shaft speed sensor (–)
(A / T)
9 —— ———
10 G GND for HO2S-2
11 G / Or Shift solenoid – B (A / T)
12 —— ———
13 —— ———
14 —— ———
15 —— ———
16 Br Tachometer signal
17 B / Y Engine start signal
CON-
NECTORTERMINALWIRE
COLORCIRCUITCON-
NECTORTERMINALWIRE
COLORCIRCUIT
20
Br / Y 19
Br / W
C02 C01C02
C03
Wire color
B : Black
B / Or : Black / Orange
B / W : Black / White
B / Y : Black / Yellow
Bl : Blue
Bl / Or : Blue / Orange
Bl / B : Blue / Black
Bl / R : Blue / Red
Bl / Y : Blue / Yellow
Br : Brown
Br / W : Brown / White
Br / Y : Brown / Yellow
G : Green
G / Or : Green / Orange
G / R : Green / Red
G / W : Green / White
Gr : Gray
Gr / R : Gray / Red
Lg / B : Lightgreen / Black
Lg / R : Lightgreen / RedP : Pink
P / Bl : Pink / Blue
P / G : Pink / Green
V : Violet
V / G : Violet / Green
V / R : Violet / Red
V / W : Violet / White
W : White
W / B : White / Black
W / R : White / Red
R : Red
R / B : Red / Black
R / Bl : Red / Blue
R / G : Red / Green
R / W : Red / White
R / Y : Red / Yellow
Y / B : Yellow / Black
Y / Bl : Yellow / Blue
Y / R : Yellow / Red
2
P
8
Bl
6E2-12 ENGINE AND EMISSION CONTROL SYSTEM (SFI FOR G13)
1 B Ground for ECM / PCM
2 B / Or Ground for drive circuit
3 B / Or Ground for drive circuit
4 V / R Canister purge valve
5 G / W Power steering pressure switch
6 V / W IAC valve
7 Bl Heater of HO2S-1
8 Bl / Or No.4 fuel injector
9 Bl / R No.1 fuel injector
10 G Ground for sensor circuit
11 B / W CMP sensor
12 —— ———
13 R Heated oxygen sensor-1
14 Lg / R Coolant temp. sensor
15 Gr / R Intake air temp. sensor
16 —— ———
17 Br / Y Electric load (+)
18 —— ———
IG coil assembly for
No.2 and 3 spark plugs
IG coil assembly for
No.1 and 4 spark plugs
21 Bl / B No.2 fuel injector
22 P Power supply for sensor
23 W CKP sensor (+)
24 B CKP sensor (–)
25 —— ———
26 G MAP sensor
27 —— ———
28 V / G Immobilizer indicator lamp
29 —— ———
30 —— ———
31 Bl / Y No.3 fuel injector
1 G / R A / C compressor clutch
2 R / Y EGR valve (stepper motor coil 1)
3 R / G Data link connector
4 Lg / B Heater of HO2S-2
5 R / B Power source
6 R / B Power source
7 W Backup power source
8 R EGR valve (stepper motor coil 3)
9 R / Bl EGR valve (stepper motor coil 2)
10 Gr Ground for main relay
11 Y / B “2”-range signal (A / T)

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

1. Battery
2. Main fuse
3. Ignition switch
4. Main relay
5. Ignition coil
6. Igniter
7. Noise suppressor
8. Distributor
9. Rotor
10. Signal rotor
11. Pick up coil
12. Spark plug
To combination
meter
6F-2 IGNITION SYSTEM

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).

6F-4 IGNITION SYSTEM
STEPACTIONYESNO
6Ignition Coil Power Supply and Ground Circuit
Check
1) Check ignition coil power supply (“B/W” wire)
circuit for open and short.
Are circuits in good condition?Go to Step 7.Repair or replace.
7Ignition Coil Check
1) Check ignition coil for resistance, referring to
“Ignition Coil” in this section.
Is check result satisfactory?Go to Step 8.Replace ignition coil
assembly.
8CMP Sensor Check
1) Check CMP sensor and signal rotor, referring to
“Distributor Unit” in this section.
Is check result satisfactory?Go to Step 9 on the
next page.Adjust or replace.
9Ignition Trigger Signal Circuit Check
1) Check ignition trigger signal (“Br / Y” or “Or” wire)
circuit for open, short and poor connection.
Are circuits in good condition?Go to Step 10.Repair or replace.
10Igniter Check
1) Check igniter, referring to “Igniter” in this section.
Is check result satisfactory?Go to Step 11.Replace igniter.
11Ignition Timing Check
1) Check initial ignition timing and ignition timing
advance, referring to “Ignition Timing” in this
section.
Is check result satisfactory?Substitute a known-
good ECM (or PCM)
and then repeat
Step 2.Go to Step 12.
12Ignition Timing Adjustment and Recheck
1) Adjust initial ignition timing, referring to “Ignition
Timing” in this section.
2) Recheck initial ignition timing and ignition timing
advance, referring to “Ignition Timing” in this
section.
Is check result satisfactory?System is in good
condition.Substitute a known-
good ECM (or PCM)
and then repeat
Step 2.

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)

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.