knock sensor SUZUKI SX4 2006 1.G Service Owner's Manual

Downloaded from www.Manualslib.com manuals search engine 1H-1 Ignition System:
Engine
Ignition System
General Description
Ignition System ConstructionS6RW0D1801001
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 signals from the sensors, determines the most suitable
ignition timing and time for electricity to flow to the primary 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 initial 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). When 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 other ignition coil assembly, No.2 and No.3 spark plugs spark
simultaneously.

Downloaded from www.Manualslib.com manuals search engine 1H-3 Ignition System:
Component Location
Ignition System Components LocationS6RW0D1803001
NOTE
The figure shows left-hand steering vehicle. For right-hand steering vehicle, parts with (*) are installed
at the opposite side.

12*
15*
13
1 689
11
10
74
5
14
2 3
16
I5RW0C180002-01
1. ECM 7. ECT sensor 13. Battery fuse box
2. Ignition coil assembly for No.1 and No.4 spark plugs 8. MAF and IAT sensor 14. Relay box
3. Ignition coil assembly for No.2 and No.3 spark plugs 9. Electric throttle body assembly 15. Junction block assembly
4. CMP sensor (VVT model) 10. High-tension cords 16. CMP sensor (VVT model)
5. CKP sensor 11. Knock sensor
6. MAP sensor (if equipped) 12. Data link connector

Downloaded from www.Manualslib.com manuals search engine Ignition System: 1H-4
Diagnostic Information and Procedures
Ignition System Symptom DiagnosisS6RW0D1804001
Reference Waveform of Ignition SystemS6RW0D1804002
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 CheckS6RW0D1804003
Condition Possible cause Correction / Reference Item
Engine cranks, but will
not start or hard to start
(No spark)Blown fuse for ignition coilReplace.
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 coilReplace ignition coil assembly.
Faulty CKP sensor or CKP sensor plateClean, tighten or replace.
Faulty CMP sensor or sensor rotor tooth
of camshaftClean, tighten or replace.
Faulty ECMReplace.
Poor fuel economy or
engine performanceIncorrect ignition timingCheck related sensors and CKP sensor plate.
Faulty spark plug(s) or high-tension
cord(s)Adjust, clean or replace.
Faulty ignition coil assemblyReplace.
Faulty CKP sensor or CKP sensor plateClean, tighten or replace.
Faulty CMP sensor or sensor rotor tooth
of camshaftClean, tighten or replace.
Faulty knock sensorReplace.
Faulty ECMReplace.
Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check in
Section 1A”.
2Ignition 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 12. Go to Step 3.
3DTC 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.
4Electrical connection check
1) Check ignition coil assemblies and high-tension cords
for electrical connection.
Are they connected securely?Go to Step 5. Connect securely.
5High-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-5 Ignition System:
6Ignition coil assembly power supply and ground circuit
check
1) Check ignition coil assembly power supply and ground
circuits for open and short.
Are circuits in good condition?Go to Step 7. Repair or replace.
7Ignition coil assembly check
1) Check ignition coil for resistance referring to “Ignition
Coil Assembly (Including Ignitor) Inspection”.
Is check result satisfactory?Go to Step 8. Replace ignition coil
assembly.
8CKP sensor check
1) Check CKP sensor referring to “Crankshaft Position
(CKP) Sensor Inspection in Section 1C”.
Is check result satisfactory?Go to Step 9. Tighten CKP sensor
bolt, replace CKP
sensor or CKP sensor
plate.
9CMP sensor check
1) Check CMP sensor referring to “Camshaft Position
(CMP) Sensor Inspection in Section 1C”.
Is check result satisfactory?Go to Step 10. Tighten CMP sensor
bolt, replace CMP
sensor or intake
camshaft.
10Ignition trigger signal circuit check
1) Check ignition trigger signal wire for open, short and
poor connection.
Is circuit in good condition?Go to Step 11. Repair or replace.
11A known-good ignition coil assembly substitution
1) Substitute a known-good ignition coil assembly and then
repeat Step 2.
Is check result of Step 2 satisfactory?Go to Step 12. Substitute a known-
good ECM and then
repeat Step 2.
12Ignition timing check
1) Check initial ignition timing and ignition timing advance
referring to “Ignition Timing Inspection”.
Is check result satisfactory?System is in good
condition.Go to Step 13.
13Knock sensor check
1) Confirm that knock sensor circuit is in good condition
referring to “DTC P0327 / P0328: Knock Sensor Circuit
Low / High in Section 1A”.
2) Check oscilloscope waveform of knock sensor signal
referring to “Reference waveform No.19” and
“Reference waveform No.20” under “Inspection of ECM
and Its Circuits in Section 1A”.
Is check result satisfactory?Check CMP sensor,
CMP sensor rotor tooth
of camshaft, CKP
sensor, CKP sensor
plate and/or input
signals related to this
system.Substitute a known-
good knock sensor and
recheck. Step Action Yes No

Downloaded from www.Manualslib.com manuals search engine 1H-9 Ignition System:
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.
5) Fix ignition timing by using “Fixed Spark Control” of
“Engine / Active Test” mode on scan tool.
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): 09930–764207) If ignition timing is out of specification, check the
followings.
• CKP sensor
• CKP sensor plate
• TP sensor
• CMP sensor
• CMP sensor rotor tooth of camshaft
• Vehicle speed signal from ABS hydraulic unit /
control module
• Knock sensor
• Timing chain cover installation
8) After checking initial ignition timing, release ignition
timing fixation by using scan tool.
9) With engine idling (throttle opening at closed position
and vehicle stopped), check that ignition timing is
about 5° – 15° BTDC (Constant variation within a
few degrees from 5° – 15° 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.
1, (A)10
0I3RB0A180004-01

Downloaded from www.Manualslib.com manuals search engine 9A-11 Wiring Systems:
Connector Layout Diagram
Connector Layout DiagramS6RW0D910A001
Refer to “Engine Compartment”.
Refer to “Instrument Panel”.
Refer to “Door, Roof”.
Refer to “Floor”.
Refer to “Rear”.
Engine CompartmentS6RW0D910A002
A: Battery cable / C: Engine harness (M15A engine RHD)
C: Engine harness
C124
C40
C102
C91
C192
C194
C42
C162
C141C196
C195
C93C94C101C39C92
C31
C311C312
C36C48
C37C123
C47C32C282
C283
C343
(TO E371)
C01
C34
C07
C06
C122
C46
C139
C44
C166
43
2
1
C
A
I6RW0C910901-01
No./Color Connective position No./Color Connective position
C01/GRY ECM C101/GRY IG COIL #1
C06/N (A/T) TCM C102/GRY IG COIL #2
C07/N (A/T) TCM C122/GRY EGR valve
C31/GRY CKP sensor C123/BLK EVAP canister purge valve
C32/BLK CMP sensor C124/BLU OCV
C34/GRY
(A/T)VSSC139/GRY
(A/T)Shift solenoid
C36/BLK MAP sensor C141/BLK A/C compressor
C37/GRY Knock sensor C162/N Oil pressure switch
C39/BLK ECT sensorC166/GRY
(A/T)Transaxle range sensor
C40/BLK A/F sensor C192/- Generator

Downloaded from www.Manualslib.com manuals search engine 9A-13 Wiring Systems:
A: Battery cable / C: Engine harness (M16A engine LHD)
C: Engine harnessC37/GRY Knock sensorC165/BLK
(M/T)Back-up light switch
C39/BLK ECT sensorC166/GRY
(A/T)Transaxle range sensor
C42/BLK Heated oxygen sensor #1 C192/- Generator
C43/GRN Heated oxygen sensor #2 C194/BLK Generator
C44/BLU (A/
T)Input sensor C195/BLK Starting motor
C47/BLK MAF sensor C196/- Starting motor
C48/BLK Throttle position sensor C282/- Main fuse box
C91/GRY Injector #1 C283/- Main fuse box
C92/GRY Injector #2 C311/- Weld splice
C93/GRY Injector #3 C312/- Weld splice
C94/GRY Injector #4 C313/- Weld splice
C101/GRY IG COIL #1 C343/N Main harness (To E371)No./Color Connective position No./Color Connective position
C124
C32
C42
C102
C91
C192
C194
C43
C162
C141C196
C195
C93C94C101C39C92
C31
C311
C313C312
C36C48
C37C123
C47C32C282
C283
C343
(TO E371)
C01
C34
C07
C06
C122
C165
C139
C44
C166
43
2
1
5C
AWithout OCV
With OCV A
A
B
B
I6RW0C910903-01
No./Color Connective position No./Color Connective position
C01/GRY ECM C102/GRY IG COIL #2
C06/N (A/T) TCM C122/GRY EGR valve
C07/N (A/T) TCM C123/BLK EVAP canister purge valve
C31/GRY CKP sensorC124/BLU
(IF EQPD)OCV

Downloaded from www.Manualslib.com manuals search engine Wiring Systems: 9A-14
A: Battery cable / C: Engine harness (J20A engine RHD)
C: Engine harnessC32/BLK or
GRYCMP sensorC139/GRY
(A/T)Shift solenoid
C34/GRY
(A/T)VSS C141/BLK A/C compressor
C36/BLK MAP sensor C162/- Oil pressure switch
C37/GRY Knock sensorC165/BLK
(M/T)Back-up light switch
C39/BLK ECT sensorC166/GRY
(A/T)Transaxle range sensor
C42/BLK Heated oxygen sensor #1 C192/- Generator
C43/GRN Heated oxygen sensor #2 C194/BLK Generator
C44/BLU (A/
T)Input sensor C195/BLK Starting motor
C47/BLK MAF sensor C196/- Starting motor
C48/BLK Throttle position sensor C282/- Main fuse box
C91/GRY Injector #1 C283/- Main fuse box
C92/GRY Injector #2 C311/- Weld splice
C93/GRY Injector #3 C312/- Weld splice
C94/GRY Injector #4 C313/- Weld splice
C101/GRY IG COIL #1 C343/N Main harness (To E371)No./Color Connective position No./Color Connective position
C42
C101
C91
C64 C92
C194 C163
C141C102C196 C192
C195
C312
C93C104C103
C94C31C32
C40
C162
C39
C123C48C37
C47
C282
C283C46
C343
(TO E371)
C01
C45
C07
C06
C139 C44
C165
C166
3
2
1
4
A
C
I6RW0C910904-02
No./Color Connective position No./Color Connective position
C01/GRY ECM C101/GRY IG COIL #1

Downloaded from www.Manualslib.com manuals search engine 9A-15 Wiring Systems:
A: Battery cable / C: Engine harness (J20A engine LHD)C06/N (A/T) TCM C102/GRY IG COIL #2
C07/N (A/T) TCM C103/GRY IG COIL #3
C31/GRY CKP sensor C104/GRY IG COIL #4
C32/N CMP sensor C123/BLU EVAP canister purge valve
C37/GRY Knock sensorC139/GRY
(A/T)Shift solenoid
C39/BLK ECT sensor C141/BLK A/C compressor
C40/GRN A/F sensor C162/N Oil pressure switch
C42/GRY Heated oxygen sensorC163/N (IF
EQPD)P/S pressure switch
C44/BLK (A/
T)Input sensorC165/BLK
(M/T)Back-up light switch
C45/BLK (A/
T)Output sensorC166/BLK
(A/T)Transaxle range sensor
C46/GRY Current sensor C192/- Generator
C47/BLK MAF sensor C194/BLK Generator
C48/BLK Throttle position sensor C195/BLK Starting motor
C64/BRN VIM motor C196/- Starting motor
C91/GRY Injector #1 C282/- Main fuse box
C92/GRY Injector #2 C283/- Main fuse box
C93/GRY Injector #3 C312/- Weld splice
C94/GRY Injector #4 C343/N Main harness (To E371) No./Color Connective position No./Color Connective position
C42
C101
C91
C64 C92
C194 C163
C141C102C196 C192
C195
C312
C93C104C103
C94C31C32
C40
C162
C39
C123C48C37
C47
C282
C283C46
C343
(TO E371)
C01
C45
C07
C06
C139 C44
C165
C166
3
2
1
4C
A
I6RW0C910905-02

Downloaded from www.Manualslib.com manuals search engine Wiring Systems: 9A-16
C: Engine harness
E: Main harness (RHD)No./Color Connective position No./Color Connective position
C01/GRY ECM C101/GRY IG COIL #1
C06/N (A/T) TCM C102/GRY IG COIL #2
C07/N (A/T) TCM C103/GRY IG COIL #3
C31/GRY CKP sensor C104/GRY IG COIL #4
C32/N CMP sensor C123/BLU EVAP canister purge valve
C37/GRY Knock sensorC139/GRY
(A/T)Shift solenoid
C39/BLK ECT sensor C141/BLK A/C compressor
C40/GRN A/F sensor C162/N Oil pressure switch
C42/GRY Heated oxygen sensorC163/N (IF
EQPD)P/S pressure switch
C44/BLK (A/
T)Input sensorC165/BLK
(M/T)Back-up light switch
C45/BLK (A/
T)Output sensorC166/BLK
(A/T)Transaxle range sensor
C46/GRY Current sensor C192/- Generator
C47/BLK MAF sensor C194/BLK Generator
C48/BLK Throttle position sensor C195/BLK Starting motor
C64/BRN VIM motor C196/- Starting motor
C91/GRY Injector #1 C282/- Main fuse box
C92/GRY Injector #2 C283/- Main fuse box
C93/GRY Injector #3 C312/- Weld splice
C94/GRY Injector #4 C343/N Main harness (To E371)
E68
E40
E33
E165
E36
E161
E151
E159
E70E281E163E62E63E65E37E164
E64
E183
E08
E311
E312E222E224E225E223
E221
E371
(TO C343)E166
E227
E229
E234
E230
E01
E35
E241
E69
E162
E152
E160
E231
E226
8
9
76
E
I6RW0C910906-07