2008 SUZUKI SWIFT 001

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Engine
Ignition System
General Description
Ignition System ConstructionS7RS0B1801001
The ignition system is an electronic (distributorless) ignition system. It consists of the parts as described below.
• ECM
It detects the engine and vehicle conditions through the si gnals from the sensors, determines the most suitable
ignition timing and time for electricity to flow to the primar y coil and sends a signal to the ignitor (power unit) in the
ignition coil assembly.
• Ignition coil assembly (including an ignitor)
The ignition coil assembly has a built -in ignitor which turns ON and OFF the current flow to the primary coil
according to the signal from ECM. When the current flow to the primary coil is turned OFF, a high voltage is induced
in the secondary coil.
• High-tension cords and spark plugs
• CMP sensor (Camshaft position sensor) and CKP sensor (Crankshaft position sensor)
Using signals from these sensors, ECM identifies the specific cylinder whose piston is in the compression stroke,
detects the crank angle and adjusts in itial ignition timing automatically.
• TP sensor, ECT sensor, MAP sensor, MAF sensor, IAT sensor, knock sensor and other sensors / switches
Although this ignition system does not have a distributor, it has two ignition coil assemblies (one is for No.1 and No.4
spark plugs and the other is for No.2 and No.3 spark plugs). W hen an ignition signal is sent from ECM to the ignitor in
the ignition coil assembly for No.1 and No.4 spark plugs, a high voltage is induced in the secondary coil and that
passes through the high-tension cords and causes No.1 and No.4 spark plugs to spark simultaneously. Likewise,
when an ignition signal is sent to the ignitor in the ot her ignition coil assembly, No.2 and No.3 spark plugs spark
simultaneously.

Downloaded from www.Manualslib.com manuals search engine 1H-2 Ignition System:
Schematic and Routing Diagram
Ignition System Wiring Circuit DiagramS7RS0B1802001
E23-60
E23-29 12V 5V
5V
E23-1
E23-16
BLK/WHT
BLK/RED
BLK/RED BLK/RED
BLK/YELBLK/YEL
BLK/YEL
GRN
BLKWHT
WHT
BRN/WHT
BLK/ORN
BLK
BLK
C37-20
BLK/RED
PNK
5V
C37-21
BLK/WHT
7
3 4
1
12 5
6
2
11
8
9
10
GRN/YEL
GRN/WHT
C37-6
C37-5 5V
5V
RED/YEL
C37-58
C37-15
C37-30
E23
C37
34
1819
567
1011
17
20
47 46
495051
2122
52 16
25 9
24
14
29
55
57 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
40
42 39 38
44
45 43 41 331
1213
238
34
1819
567
1011
17
20
47 46
495051
2122
52 16
25 9
24
14
29
55
57 54 53
59
60 58 2
262728
15
30
56 4832 31
34353637
40
42 39 38
44
45 43 41 331
1213
238
13
14
15
16
17
50A50A80A
BLK/ORN
E23-31 BLK
I4RS0B180001-01
1. Ignition switch 7. No.1 spark plug 13. Individual circuit fuse box
No.1
2. Main relay 8. No.2 spark plug 14. “IG ACC” fuse
3. Ignition coil assembly for No.1 and No.4 spark plugs 9. No.3 spark plug 15. “FI” fuse
4. Ignition coil assembly for No.2 and No.3 spark plugs 10. No.4 spark plug 16. Junction block assembly
5. CMP sensor 11. Sensed information (MAP sensor, ECT sensor, MAF and IAT
sensor, TP sensor, Knock sensor, VSS, Electric load signal,
Engine start signal) 17. “IG COIL” fuse
6. CKP sensor 12. Battery fuse box

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Component Location
Ignition System Components LocationS7RS0B1803001
NOTE
The figure shows left-hand steering vehicle. For right-hand steering vehicle, parts with (*) are installed
at the opposite side.

16*
1
2
14
7
5 12 11
410
6
89
3 13*
15
17
I6RS0C180001-01
1. ECM 7. ECT sensor13. Data link connector
2. Ignition coil assembly for No.1 and No.4 spark plugs 8. MAF and IAT sensor 14. Battery fuse box
3. Ignition coil assembly for No.2 and No.3 spark plugs 9. Electric throttle body 15. Relay box
4. CMP sensor 10. Wheel speed sensor (VSS) 16. Junction block assembly
5. CKP sensor 11. High-tension cords
6. MAP sensor 12. Knock sensor

Downloaded from www.Manualslib.com manuals search engine 1H-4 Ignition System:
Diagnostic Information and Procedures
Ignition System Symptom DiagnosisS7RS0B1804001
Reference Waveform of Ignition SystemS7RS0B1804002
Refer to “Reference waveform No.5”, “Reference waveform No.6” and “Reference waveform No.7” under “Inspection
of ECM and Its Circuits in Section 1A” for waveform of Ignition trigger signal.
Ignition System CheckS7RS0B1804003
Condition Possible cause Correction / Reference Item
Engine cranks, but will
not start or hard to start
(No spark) Blown fuse for ignition coil
Replace.
Loose connection or disconnection of
lead wire or high-tension cord(s) Connect securely.
Faulty high-tension cord(s) Replace.
Faulty spark plug(s) Replace.
Faulty ignition coil Replace ignition coil assembly.
Faulty CKP sensor or CKP sensor plate Clean, tighten or replace.
Faulty CMP sensor or sensor rotor tooth
of camshaft Clean, tighten or replace.
Faulty ECM Replace.
Poor fuel economy or
engine performance Incorrect ignition timing
Check related sensors and CKP sensor plate.
Faulty spark plug(s) or high-tension
cord(s) Adjust, clean or replace.
Faulty ignition coil assembly Replace.
Faulty CKP sensor or CKP sensor plate Clean, tighten or replace.
Faulty CMP sensor or sensor rotor tooth
of camshaft Clean, tighten or replace.
Faulty knock sensor Replace.
Faulty ECM Replace.
StepAction YesNo
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2.
Go to “Engine and
Emission Control
System Check in
Section 1A”.
2 Ignition spark test
1) Check all spark plugs for condition and type referring to
“Spark Plug Inspection”.
2) If OK, perform ignition spark test referring to “Ignition Spar k Tes t”.
Is spark emitted from all spark plugs? Go to Step 13. Go to Step 3.
3 DTC check
1) Perform DTC check referring to “DTC Check in Section
1A”.
Is DTC stored in ECM? Go to applicable DTC
diag. flow.
Go to Step 4.
4 Electrical connection check
1) Check ignition coil assemblies and high-tension cords
for electrical connection.
Are they connected securely? Go to Step 5.
Connect securely.
5 High-tension cords check
1) Check high-tension cord for resistance referring to
“High-Tension Cord Inspection”.
Is check result satisfactory? Go to Step 6.
Replace high-tension
cord(s).

Downloaded from www.Manualslib.com manuals search engine 1H-6 Ignition System:
Ignition Spark TestS7RS0B1804004
1) Remove air cleaner assembly with air intake pipe.
2) Disconnect all injector couplers from injectors.
WARNING!
Without disconnection of injector couplers,
combustible gas may come out from spark
plug holes during this test and may get
ignited in engine room.

3) Remove spark plug and check it for condition and
type referring to “Spark Plug Inspection”.
4) If OK, connect ignition coil coupler to ignition coil assembly and connect spark plug to ignition coil
assembly or high-tension cord. Ground spark plug. 5) Crank engine and check if each spark plug sparks.
6) If no spark is emitted, inspect the related parts as
described in “Ignition System Symptom Diagnosis”.
Repair Instructions
High-Tension Cord Removal and InstallationS7RS0B1806001
Removal
1) Remove air cleaner assembly with air intake pipe and cylinder head upper cover.
2) Disconnect No.1 cylinder (2) and No.3 cylinder (3)
high-tension cords from ignition coil assemblies (1)
while gripping each cap.
3) 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 gripping cap portion.

Installation
1) Install No.1 cylinder (2) and No.3 cylinder (3) high-
tension cords to spark plugs and ignition coil
assemblies (1) while gripping each cap.
CAUTION!
• Never attempt to use metal conductor high-tension cords as replacing parts.
• Insert each cap portion fully when installing high-tension cords.

I4RS0A180006-01
I4RS0A180003-01
I4RS0A180004-01

Downloaded from www.Manualslib.com manuals search engine Ignition System: 1H-9
6) Set timing light (1) to high-tension cord for No.1 cylinder and check that ignition timing is within
specification.
Initial ignition timing
Fixed with SUZUKI scan tool: 5 ± 3° BTDC (at
specified idle speed)
Ignition order
1 – 3 – 4 – 2
Special tool
(A): 09930–76420 7) If ignition timing is out
of specification, check the
followings.
• CKP sensor
• CKP sensor plate
• CMP sensor
• CMP sensor rotor tooth of camshaft
• VSS
• Timing chain cover installation
8) After checking initial igniti on timing, release ignition
timing fixation by using scan tool.
9) With engine idling (throttl e opening at closed position
and vehicle stopped), check that ignition timing is
about 3 ° – 13° BTDC. (Constant variation within a
few degrees from 3 ° – 13° BTDC indicates no
abnormality but proves operation of electronic timing
control system.) Also, check that increasing engine
speed advances ignition timing.
If the check results are not satisfactory, check CKP
sensor and ECM.
Specifications
Tightening Torque SpecificationsS7RS0B1807001
Reference:
For the tightening torque of fastener not specified in this section, refer to “Fasteners Information in Section 0A”.
Special Tools and Equipment
Special ToolS7RS0B1808001
1, (A)10
0I3RB0A180004-01
Fastening part Tightening torque
Note
N ⋅mkgf-mlb-ft
Spark plug 25 2.5 18.0 )
Ignition coil bolt 10 1.0 7.5 )
09930–76420SUZUKI scan tool
Timing-light (dry cell type) —
) This kit includes following
items. 1. Tech 2, 2. PCMCIA
card, 3. DLC cable, 4. SAE
16/19 adapter, 5. Cigarette
cable, 6. DLC loop back
adapter, 7. Battery power
cable, 8. RS232 cable, 9.
RS232 adapter, 10. RS232
loop back connector, 11.
Storage case, 12. )

Downloaded from www.Manualslib.com manuals search engine 1I-1 Starting System:
Engine
Starting System
Schematic and Routing Diagram
Cranking System Circuit DiagramS7RS0B1902001
Diagnostic Information and Procedures
Cranking System Symptom DiagnosisS7RS0B1904001
Possible symptoms due to starting system trouble would be as follows:
• Starting motor does not run (or runs slowly)
• Starting motor runs but fails to crank engine
• Abnormal noise is heard
Proper diagnosis must be made to determine exactly where the cause of each trouble lies in battery, wiring harness,
(including starting motor switch), starting motor or engine.
Do not remove motor just because starting motor does not run. Check the following items and narrow down scope of
possible causes.
1) Condition of trouble
2) Tightness of battery terminals (including ground cable connection on engine side) and starting motor terminals
3) Discharge of battery
4) Mounting of starting motor
I4RS0A190001-01
1. Pinion drive lever 6. Magnetic switch contacts 11. Ignition & Starter switch
2. Pinion & Over-running clutch 7. Pull-in coil 12. Battery
3. Magnetic switch 8. Starting motor 13. To ECM
4. Hold-in coil 9. Starting motor control relay
5. Plunger 10. A/T: Transmission range switch (shift lever switch)

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Repair Instructions
Starting Motor Dismounting and RemountingS7RS0B1906001
Dismounting1) Disconnect negative (–) battery lead at battery.
2) Disconnect magnetic switch lead wire (1) and battery cable (2) from starting motor terminals.
3) Detach shift & select control cable bracket from transaxle. (M/T model only)
4) Remove starting motor mount bolt (3) and nut (4).
5) Remove starting motor (5).
Remounting
Reverse the dismounting procedure noting the following.
• Tighten battery cable nut (6) to specified torque.
Tightening torque
Starting motor battery cable nut (a): 9.8 N·m (0.98 kgf-m, 7.0 lb-ft)
I4RS0A190002-01
: 9.8 N ⋅m (0.98 kgf-m, 7.0 lb-ft)