2006 SUZUKI SX4 Timing

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-111
DTC Troubleshooting
NOTE
If the vehicle runs under fuel deficient condition (such as a condition in which the fuel pump is unable
to draw fuel properly), DTC of misfire may possibly be detected due to fuel pressure drop even though
there is no abnormal condition existing in the Engine and Emission System.
Therefore, if the DTC still cannot be detected with “Trouble Symptom Confirmation” executed in
accordance with “Engine and Emission Control System Check” the possible cause may be due to a
running condition under insufficient fuel supply at the time of detecting DTC of misfire.

Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2Does fuel level meter indicate “E” level (empty)?Add fuel and recheck. Go to Step 3.
3Fuel quality check
1) Check that there is fuel of good quality in the fuel tank.
Is it OK?Go to Step 4. Clean in fuel system
circuit and change fuel.
4Ignition system check
1) Check spark plug and ignition spark of cylinder where
misfire occurs, referring to “Spark Plug Inspection in
Section 1H” and “Ignition Spark Test in Section 1H”.
Are they in good condition?Go to Step 5. Faulty ignition coil, wire
harness, spark plug or
other system parts.
5Fuel injector circuit check
1) Using sound scope, check each injector operating sound
at engine cranking or idling.
Do all injectors make operating sound?Go to Step 6. Check coupler
connection and wire
harness of injector not
making operating sound
and injector itself. If OK,
substitute a known-
good ECM and recheck.
6Fuel pressure check
1) Check fuel pressure referring to “Fuel Pressure Check”.
Is check result satisfactory?Go to Step 7. Repair or replace fuel
system.
7Fuel injector check
1) Check fuel injector(s) referring to “Fuel Injector
Inspection in Section 1G”.
Is check result satisfactory?Go to Step 8. Replace defective
injector.
8Ignition timing check
1) Check ignition timing referring to “Ignition Timing
Inspection in Section 1H”.
Is check result satisfactory?Go to Step 9. Check related sensors.
9EGR system check
1) Check EGR system referring to “EGR System Inspection
(If Equipped) in Section 1B”.
Is check result satisfactory?Go to Step 10. Repair or replace EGR
system.
10Exhaust system check
1) Check exhaust system for exhaust gas clogged.
Is it OK?Go to Step 11. Repair clogged of
exhaust system.

Downloaded from www.Manualslib.com manuals search engine 1A-112 Engine General Information and Diagnosis:
DTC P0327 / P0328: Knock Sensor Circuit Low / HighS6RW0D1104040
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) Connect scan tool to DLC with ignition switch turned OFF.
2) Turn ON ignition switch and clear DTC, pending DTC and freeze frame data by using scan tool.
3) Start engine and run it for 10 sec.
4) Check DTC by using scan tool.11Engine mechanical system check
1) Check engine mechanical parts or system which can
cause engine rough idle or poor performance.
• Engine compression (Refer to “Compression Check in
Section 1D”.)
• Valve lash (Refer to “Valve Lash (Clearance)
Inspection in Section 1D”.)
• Valve timing (Refer to “Timing Chain and Chain
Tensioner Removal and Installation in Section 1D”.)
Are they in good condition?Check wire harness and
connection of ECM
ground, ignition system
and fuel injector for
intermittent open and
short.Repair or replace
defective part. Step Action Yes No
E01C01
3 4
18 19 5 6 7 10 11
17 20
47 46 49 50 51 21 22
5216 259
24 14
29
55 57 54 53 59
60 582
26 27 28 15
30
56 4832 31 34 35 36 37 40 42 39 38 44
45 43 41 331 12 13
238 3 4
18 19 5 6 7 10 11
17 20
47 46 49 50 51 21 22
5216 259
24 14
29
55 57 54 53 59
60 582
26 27 28 15
30
56 4832 31 34 35 36 37 40 42 39 38 44
45 43 41 331 12 13
238
12
REDC01-56
5 V
I6RW0D110030-01
1. Knock sensor 2. ECM
DTC detecting condition Trouble area
DTC P0327:
Voltage of knock sensor is lower than specified value with engine
running.
(1 driving cycle detection logic)
DTC P0328:
Voltage of knock sensor is higher than specified value with
engine running.
(1 driving cycle detection logic)• Knock sensor circuit (open or short)
• Knock sensor
•ECM

Downloaded from www.Manualslib.com manuals search engine Engine General Information and Diagnosis: 1A-117
System Description
The CMP sensor located on the transmission side of cylinder head (VVT model) or timing chain cover (non-VVT
model) consists of the signal generator (magnetic sensor) and signal rotor (intake camshaft portion (VVT model) or
exhaust camshaft timing sprocket (non-VVT model)).
The signal generator generates reference signal through slits in the slit plate which turns together with the camshaft.
Reference signal
The CMP sensor generates 6 pulses of signals each of which has a different waveform length while the camshaft
makes one full rotation. Refer to “Inspection of ECM and Its Circuits”.
Based on these signals, ECM judges which cylinder piston is in the compression stroke and the engine speed.
DTC Detecting Condition and Trouble Area
DTC Confirmation Procedure
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Crank engine for 5 sec.
4) Check DTC and pending DTC.
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting”.

DTC detecting condition Trouble area
• CMP sensor pulse is less than 20 pulses per crankshaft 8 revolutions
or
• CMP sensor pulse is more than 28 pulses per crankshaft 8
revolutions
or
• CMP sensor pulse is less than 20 pulses between BTDC 75° CA and
BTDC 5° CA with crankshaft 8 revolutions from engine start.
(1 driving cycle detection logic)• CMP sensor circuit open or short
• Signal rotor teeth damaged
• CMP sensor malfunction, foreign material
being attached or improper installation
•ECM
Step Action Yes No
1Was “Engine and Emission Control System Check”
performed?Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2CMP sensor and connector for proper installation check
Is CMP sensor installed properly and connector connected
securely?Go to Step 3. Correct.

Downloaded from www.Manualslib.com manuals search engine 1A-212 Engine General Information and Diagnosis:
Repair Instructions
Idle Speed and IAC Throttle Valve Opening
Inspection
S6RW0D1106001
Before idle speed check, make sure of the following.
• Lead wires and hoses of electronic fuel injection and
engine and emission control systems are connected
securely.
• Valve lash is checked according to maintenance
schedule.
• Ignition timing is within specification.
• All accessories (wipers, heater, lights, A/C, etc.) are
out of service.
• Air cleaner has been properly installed and is in good
condition.
• No abnormal air drawn in from air intake system.After all items are confirmed, check idle speed and IAC
throttle opening as follows.NOTE
Before starting engine, place transmission
gear shift lever in “Neutral”, and set parking
brake and block drive wheels.

Step Action Yes No
1Is there DTC(s) of ECT sensor circuit (DTC P0116 / P0117 /
P0118) and/or radiator cooling fan circuit (DTC P0480)?Go to corresponding
DTC flow.Go to Step 2.
2Radiator cooling fan control circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Start engine and select “Data List” on scan tool.
3) Warm up engine until coolant temp. is 100 °C, 212 °F or
higher and A/C switch turns OFF (if equipped with A/C).
(If engine coolant temp. dose not rise, check engine
cooling system or ECT sensor.)
Is radiator cooling fan started when engine coolant temp.
reached above temp.?Radiator cooling fan
control system is in
good condition.Perform from Step 2 to
Step 7 in DTC P0480
diag. flow. If OK, Go to
Ste p 3.
3Radiator cooling fan control check
1) Disconnect radiator cooling fan motor connector with
ignition switch turned OFF.
2) Run engine when ECT is over 100 °C, 212 °F.
3) Measure voltage between vehicle body ground and
“BLU/RED” wire terminal of disconnected radiator
cooling fan motor connector.
Is voltage 10 – 14 V?Go to Step 4. “BLU/RED” wire is open
or high resistance
circuit.
4Check radiator cooling fan wire circuit check
1) Turn ignition switch to OFF position.
2) Measure resistance between “BLK” wire terminal of
disconnected radiator cooling fan motor connector and
vehicle body ground.
Is resistance below 1
Ω?Go to Step 5. “BLK” wire is open or
high resistance circuit.
5Radiator cooling fan check
1) Check radiator cooling fan referring to “Radiator Cooling
Fan Assembly On-Vehicle Inspection in Section 1F”.
Is it in good condition?Substitute a known-
good ECM and recheck.Faulty radiator cooling
fan.

Downloaded from www.Manualslib.com manuals search engine Engine Electrical Devices: 1C-9
Camshaft Position (CMP) Sensor Removal and
Installation
S6RW0D1306012
Removal
1) Disconnect negative cable at battery.
2) Disconnect connector from CMP sensor.
3) Remove camshaft position sensor from timing chain
cover (non-VVT model) or cylinder head (VVT
model).
Installation
1) Install camshaft position sensor to timing chain cover
(non-VVT model) or cylinder head (VVT model).
Tightening torque
CMP sensor bolt (non-VVT model) (a): 10 N·m (
1.0 kgf-m, 7.5 lb-ft)
CMP sensor bolt (VVT model) (b): 11 N·m (1.1
kgf-m, 8.0 lb-ft)
2) Connect connector to CMP sensor securely.
3) Connect negative cable to battery.
Camshaft Position (CMP) Sensor InspectionS6RW0D1306013
Visual check
• Check that O-ring is free from damage.
• Check that end face of sensor and signal rotor tooth
are free from any metal particles and damage.
[A]: Non-VVT model [B]: VVT model
I6RW0D130002-02
I4RS0B130015-01

Downloaded from www.Manualslib.com manuals search engine Engine Mechanical: 1D-1
Engine
Engine Mechanical
General Description
Engine Construction DescriptionS6RW0D1401001
The engine is water-cooled, in line 4 cylinders, 4 stroke cycle gasoline unit with its DOHC (Double overhead camshaft)
valve mechanism arranged for “V” type valve configuration and 16 valves (4 valves/one cylinder). The double
overhead camshaft is mounted over the cylinder head; it is driven from crankshaft through timing chain, and no push
rods are provided in the valve train system.
I5RW0C140032-01

Downloaded from www.Manualslib.com manuals search engine Engine Mechanical: 1D-3
Camshaft Position Control (VVT Variable Valve Timing) System DescriptionS6RW0D1401002
System Description
The VVT system is an electronic control system which continuously vary and optimize the intake valve timing in
response to the engine operating condition.
The optimized intake valve timing produce such an air intake with high efficiency that both the higher power generation
and lower fuel consumption can be attained in the whole engine speed range from low to high. In the area of the
average engine load, low emission of nitrogen oxides (NOx) and high fuel efficiency can also be attained by making
the valve opening overlap between the intake and exhaust valves longer.
For the brief of the system operation, the intake valve timing is varied by the cam timing sprocket (1) which varies the
rotational phase between the intake camshaft (3) and sprocket. The rotor (2) in the cam timing sprocket is actuated by
switching or adjusting the hydraulic pressure applied to the chambers for the timing advancing (7) and/or retarding (6).
To switch or adjust the hydraulic pressure appropriately, ECM operates the oil control valve (12) with detecting the
engine speed, intake air value, throttle opening, engine coolant temperature and camshaft position (angle).
1
4
5
10
8
9
2
7
6
12
11
3
60˚ (variable angle)
Most retarded timing Most advanced timing
Exhaust valveIntake valve
Crank angle
Overlap of valves
Valve lift
I5RW0C140002-01
4. Oil passage to chamber for timing retarding 8. Oil filter 10. Oil pan
5. Oil passage to chamber for timing advancing 9. Oil pump 11. Control signal from ECM

Downloaded from www.Manualslib.com manuals search engine 1D-4 Engine Mechanical:
Oil Control Valve
The oil control valve switches and adjusts the hydraulic
pressure applied to the cam timing sprocket by moving
the spool valve (1) according to the duty pulse signals
output from the ECM. By this operation, the intake valve
timing is varied continuously. Signals output from the
ECM are the duty pulse of about 240 Hz.
Cam Timing Sprocket
The cam timing sprocket is equipped with the chambers
for timing advancing (2) and retarding (3) which are
separated by the rotor (5). The rotor rotates receiving the
hydraulic pressure applied to both the chambers. The
sprocket (1) is installed on the housing (4) and the rotor
is secured on the intake camshaft by fastening the bolts.
Therefore, the actuation of the rotor makes the phase
difference between the sprocket and intake camshaft.
Timing Advancing
When the duty ratio of the signal output from the ECM is
heavy, the spool valve (4) of the oil control valve moves
to the left (opposite direction against the coil (5)). By this
spool valve movement, the pressurized oil (1) is led into
the chambers for timing advancing and the oil in the
chambers for timing retarding is drained. This operations
actuate the rotor (3) and result in the advanced timing of
the intake valve.Timing Holding
When the duty ratio of the signal output from the ECM
shows that of holding, the spool valve of the oil control
valve is located at hold position. Because this condition
generates no oil pressure changes in both chambers,
the rotor is fixed at a target position.
Timing Retarding
When the duty ratio of the signal output from the ECM is
light, the spool valve of the oil control valve moves to the
right (head for the coil). By this spool valve movement,
the pressurized oil is led into the chambers for timing
retarding and the oil in the chambers for timing
advancing is drained. This operations actuate the rotor
and result in the retarded timing of the intake valve.
6. Seal
2. Drain
1
I5RW0C140034-01
12
3 4
5
6
I3RH0B140004-01
1
2
5
4
3
I5RW0C140035-01
I5RW0C140036-01
I5RW0C140037-01