2006 SUZUKI SX4 check engine

Downloaded from www.Manualslib.com manuals search engine 1C-8 Engine Electrical Devices:
Heated Oxygen Sensor (HO2S-1 and HO2S-2)
Heater On-Vehicle Inspection (If Equipped)
S6RW0D1306010
1) Disconnect sensor connector.
2) Using ohmmeter, measure resistance between
terminals “V
B” and “GND” of sensor connector.
If found faulty, replace oxygen sensor.
NOTE
Temperature of sensor affects resistance
value largely. Make sure that sensor heater is
at correct temperature.

Resistance of oxygen sensor heater
HO2S-1: 5.0 – 6.4 Ω at 20 °C (68 °F)
HO2S-2: 11.7 – 14.5 Ω at 20 °C (68 °F)
Viewed from terminal side
3) Connect sensor connector securely.
Heated Oxygen Sensor (HO2S-1 and HO2S-2)
Removal and Installation (If Equipped)
S6RW0D1306011
Removal
WARNING!
To avoid danger of being burned, do not
touch exhaust system when system is hot.
Oxygen sensor removal should be performed
when system is cool.

1) Disconnect negative cable at battery.
2) Disconnect connector of heated oxygen sensor and
release its wire harness from clamps.
3) Perform following items before removing heated
oxygen sensor.
a) For HO2S-1, remove exhaust manifold referring
to “Exhaust Manifold Removal and Installation in
Section 1K”, if necessary.
b) For HO2S-2, hoist vehicle.
4) Remove heated oxygen sensor from exhaust pipe or
exhaust manifold.Installation
Reverse removal procedure noting the following.
• Tighten heated oxygen sensor (1) to specified torque.
Tightening torque
Heated oxygen sensor (a): 45 N·m (4.5 kgf-m,
32.5 lb-ft)
• Install exhaust manifold referring to “Exhaust Manifold
Removal and Installation in Section 1K”, if removed.
• Connect connector of heated oxygen sensor (1) and
clamp wire harness securely.
• After installing heated oxygen sensor, start engine
and check that no exhaust gas leakage exists.
[A]: HO2S-1 [B]: HO2S-2
I4RS0A130006-01
[A]: HO2S-1 [B]: HO2S-2
[A]
[B]
1, (a)
1, (a)
I3RM0A130007-01

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 1C-10 Engine Electrical Devices:
Performance check
1) Remove metal particles on end face of CMP sensor,
if any.
2) Arrange 12 V battery (1) and connect its positive
terminal to “Vin” terminal (2) and negative terminal to
“Ground” terminal (3) of sensor. Then using
ohmmeter, measure resistance between “Vout”
terminal (4) of sensor and negative terminal of
battery by passing magnetic substance (iron) (5)
while keeping approximately 1 mm (0.03 in.) gap
with respect to end face of CMP sensor.
If resistance does not vary as specified below,
replace CMP sensor.
CMP sensor resistance
Resistance varies from less than 220 Ω (ON) to
infinity (OFF) or from infinity (OFF) to less than 220
Ω (ON)
Crankshaft Position (CKP) Sensor Removal and
Installation
S6RW0D1306014
Removal
1) Disconnect negative cable at battery.
2) Remove generator drive belt, loosen pivot bolt and
move generator rearward.
3) Disconnect connector from crankshaft position
sensor.
4) Remove crankshaft position sensor (1) from cylinder
block.
Installation
1) Install crankshaft position sensor to cylinder block.
Tighten CKP sensor bolt to specified torque.
Tightening torque
CKP sensor bolt (a): 11 N·m (1.1 kgf-m, 8.0 lb-ft)
2) Connect connector to CKP sensor securely.
3) Adjust generator drive belt tension referring to
“Water Pump / Generator Drive Belt Tension
Inspection and Adjustment in Section 1F”.
4) Connect negative cable to battery.
[A]: Non-VVT model [B]: VVT model
I4RS0B130016-02
I2RH0B130012-01
(a)
I4RS0A130007-01

Downloaded from www.Manualslib.com manuals search engine Engine Electrical Devices: 1C-11
Crankshaft Position (CKP) Sensor InspectionS6RW0D1306015
Visual check
• Check that O-ring is free from damage.
• Check that end face of sensor and signal pulley tooth
are free from any metal particles and damage.
Performance check
1) Remove metal particles on end face of CKP sensor,
if any.
2) Arrange 12 V battery (1) and connect its positive
terminal to “Vin” terminal (2) and negative terminal to
“Ground” terminal (3) of sensor. Then using
ohmmeter, measure resistance between “Vout”
terminal (4) of sensor and negative terminal of
battery by passing magnetic substance (iron) (5)
while keeping approximately 1 mm (0.03 in.) gap
with respect to end face of CKP sensor.
If resistance does not vary as specified below,
replace CKP sensor.
CKP sensor resistance
Resistance varies from less than 220 Ω (ON) to
infinity (OFF) or from infinity (OFF) to less than 220
Ω (ON)
Knock Sensor Removal and InstallationS6RW0D1306016
Removal
1) Disconnect negative cable at battery.
2) Hoist vehicle.
3) Remove right side drive shaft referring to “Front
Drive Shaft Assembly Removal and Installation in
Section 3A”.
4) Disconnect knock sensor connector (1).
5) Remove knock sensor (2) from cylinder block.
Installation
Reverse removal procedure for installation.
Tightening torque
Knock sensor (a): 22 N·m (2.2 kgf-m, 16.0 lb-ft)
[A]: non-VVT model [B]: VVT model
I3RB0A130006-01
I4RS0B130017-01
1
2, (a)
I5RW0A130009-01

Downloaded from www.Manualslib.com manuals search engine 1C-12 Engine Electrical Devices:
Main Relay, Fuel Pump Relay, Starting Motor
Control Relay, Throttle Actuator Control Relay
and Radiator Cooling Fan Relay Inspection
S6RW0D1306017
1) Disconnect negative cable at battery.
2) Remove main relay (1), fuel pump relay (3), starting
motor control relay (2), throttle actuator control relay
(4) and/or radiator cooling fan relay (5) from
individual circuit fuse box No.1.
3) Check that there is no continuity between terminal
“C” and “D”. If there is continuity, replace relay.
4) Connect battery positive (+) terminal to terminal “B”
of relay. Connect battery negative (–) terminal to
terminal “A” of relay. Check for continuity between
terminal “C” and “D”. If there is no continuity when
relay is connected to the battery, replace relay.
Mass Air Flow (MAF) and Intake Air
Temperature (IAT) Sensor On-Vehicle
Inspection
S6RW0D1306018
NOTE
Before performed this inspection, be sure to
read the “Precautions of ECM Circuit
Inspection in Section 1A”.

1) Disconnect negative cable at battery.
2) Disconnect MAF and IAT sensor connector.
3) Connect voltmeter to “BLK/RED” wire terminal (2) of
MAF and IAT sensor connector (1) disconnected and
ground.
4) Turn ON ignition switch position and check that
voltage is battery voltage.
If not, check if wire harness is open or connection is
poor.
5) Turn OFF ignition switch position and connect
connector to MAF and IAT sensor.
6) Remove ECM from its bracket referring to “Engine
Control Module (ECM) Removal and Installation”.
7) Connect special tool between ECM and ECM
connector referring to “Inspection of ECM and Its
Circuits in Section 1A”.
8) Turn ON ignition switch position and check MAF
signal voltage between “C01-26” terminal circuit and
“C01-27” terminal circuit of special tool.
MAF signal voltage between “C01-26” terminal
circuit and “C01-27” terminal circuit of special
tool
MAF signal voltage of MAF and IAT sensor with
ignition switch turned ON: 0.5 – 1.0 V
9) Start engine and check that voltage is lower than 5 V
and it rises as engine speed increases.
MAF signal voltage between “C01-26” terminal
circuit and “C01-27” terminal circuit of special
tool
MAF signal reference voltage of MAF and IAT
sensor at specified Idle speed: 1.3 – 1.8 V
10) If check result is not as specified above, cause may
lie in wire harness, connector connection, MAF and
IAT sensor or ECM.
"D" "B""A""C"
2
1
4 3
5
I5RW0A130014-01
1. ECM
I3RB0A130009-01
“C01-27” “C01-26”
1
I6RW0D130003-02

Downloaded from www.Manualslib.com manuals search engine Engine Electrical Devices: 1C-13
Mass Air Flow (MAF) and Intake Air
Temperature (IAT) Sensor Removal and
Installation
S6RW0D1306019
CAUTION!
• Do not disassemble MAF and IAT sensor.
• Do not expose MAF and IAT sensor to any
shock.
• Do not clean MAF and IAT sensor.
• If MAF and IAT sensor has been dropped, it
should be replaced.
• Do not blow compressed air by using air
gun or the like.
• Do not put finger or any other object into
MAF and IAT sensor. Malfunction may
occur.

Removal
1) Disconnect negative cable at battery.
2) Disconnect MAF and IAT sensor connector.
3) Remove air cleaner case (1).
4) Remove MAF and IAT sensor (2) from air cleaner
case.
Installation
Reverse removal procedure noting the followings.
• Tighten MAF and IAT sensor screws to specified
torque.
Tightening torque
MAF and IAT sensor screw: 1.5 N·m (0.15 kgf-m,
1.1 lb-ft)
• Connect MAF and IAT sensor connector securely.
Intake Air Temperature (IAT) Sensor InspectionS6RW0D1306020
CAUTION!
Do not heat up MAF and IAT sensor more
than 100 °C (212 °F). Otherwise, MAF and IAT
sensor will be damaged.

• Check sensor O-ring (1) for damage and
deterioration. Replace as necessary.
• Blow hot air to temperature sensing part (2) of MAF
and IAT sensor (3) using hot air drier (4) and measure
resistance between sensor terminals while heating air
gradually.
If measured resistance does not show such
characteristic as shown, replace MAF and IAT sensor.
Intake air temperature sensor resistance
–20 °C (–4 °F): 13.6 – 18.4 kΩ
20 °C (68 °F): 2.21 – 2.69 kΩ
60 °C (140 °F): 0.493 – 0.667 kΩ
I6RW0D130004-02
[A]: Lower limit [D]: Resistance
[B]: Nominal [E]: Temperature
[C]: Upper limit 5. Temperature gauge
20 0
68 32 104 140 17640 60 80 (2.45)
(0.58)
1
2 3
45
[A][B]
[E] [C] [D]
I4RS0A130012-01

Downloaded from www.Manualslib.com manuals search engine Engine Mechanical: 1D-5
Targeted Timing Varying Operation
Diagnostic Information and Procedures
Compression CheckS6RW0D1404001
Check compression pressure on all 4 cylinders as
follows:
1) Warm up engine to normal operating temperature.
2) Stop engine after warming up.
NOTE
After warming up engine, place transmission
gear shift lever in “Neutral” (shift selector
lever to “P” range for A/T model), and set
parking brake and block drive wheels.

3) Remove air cleaner assembly with air suction hose
referring to “Air Cleaner Assembly Removal and
Installation”.
4) Remove cylinder head upper cover.
5) Remove ignition coil assemblies and all spark plugs
referring to “Spark Plug Removal and Installation in
Section 1H”.
6) Disconnect fuel injector wires at the coupler.7) Install special tools (Compression gauge) into spark
plug hole.
Special tool
(A): 09915–64512
(B): 09915–64530
(C): 09915–67010 Driving condition Valve timing Target of control Effect
Engine running at idle
speedMost retardedTo shorten the valve opening overlap in
order to prevent the exhaust gas
counterflow to intake manifold.Stabilization of the engine
rotation at idle speed.
Average engine load
rangeTo the advanced
sideTo lengthen the valve opening overlap
in order to enhance the internal
exhaust gas recirculation and reduce
the pumping loss.Improvement of the fuel
efficiency.
Lowering of the exhaust
emission.
Light engine load
rangeTo the retarded sideTo shorten the valve opening overlap in
order to prevent the exhaust gas
counterflow to intake manifold.Keeping of the engine stability.
Low or average
engine speed range
with heavy engine
loadTo the advanced
sideTo advance the closing timing of the
intake valve in order to improve the
volumetric efficiency.Improvement of generating the
engine torque at low and
average engine speed.
High engine speed
range with heavy
engine loadTo the retarded sideTo retard the closing timing of the
intake valve in order to improve the
volumetric efficiency.Improvement of generating the
engine power.
Low engine coolant
temperatureMost retardedTo shorten the valve opening overlap in
order to prevent the exhaust gas
counterflow to intake manifold and
reduce the fuel increasing.
To slow the fast idle speed of the
engine as a result of stabilizing the
engine idling.Stabilization of the fast idling of
the engine.
Improvement of the fuel
efficiency.
At engine starting and
stoppingMost retardedTo shorten the valve opening overlap in
order to prevent the exhaust gas
counterflow to intake manifold.Improvement of start ability.
(A)
(C)
(B)
I3RH0B140009-01

Downloaded from www.Manualslib.com manuals search engine 1D-6 Engine Mechanical:
8) Disengage clutch (1) (to lighten starting load on
engine) for M/T vehicle, and depress accelerator
pedal (2) all the way to make throttle fully open.
9) Crank engine with fully charged battery, and read the
highest pressure on compression gauge.
NOTE
• For measuring compression pressure,
crank engine at least 250 r/min. by using
fully charged battery.
• If measured compression pressure is
lower than limit value, check installation
condition of special tool. If it is properly
installed, possibility is compression
pressure leakage from where piston ring
and valve contact.

Compression pressure
Standard: 1400 kPa (14.0 kgf/cm2, 199.0 psi)
Limit: 1100 kPa (11.0 kgf/cm2, 156.0 psi)
Max. difference between any two cylinders: 100
kPa (1.0 kgf/cm
2, 14.2 psi)
10) Carry out Steps 7) through 9) on each cylinder to
obtain 4 readings.
11) After checking, install spark plugs and ignition coil
assemblies with high-tension cord referring to “Spark
Plug Removal and Installation in Section 1H”.
12) Connect ignition coil couplers.
13) Connect fuel injector wires at the coupler.
14) Install cylinder head upper cover.
15) Install air cleaner assembly with air section hose
referring to “Air Cleaner Assembly Removal and
Installation”.
Engine Vacuum CheckS6RW0D1404002
The engine vacuum that develops in the intake line is a
good indicator of the condition of the engine. The
vacuum checking procedure is as follows:
1) Warm up engine to normal operating temperature.
NOTE
After warming up engine, place transmission
gear shift lever in “Neutral” (shift selector
lever to “P” range for A/T model), and set
parking brake and block drive wheels.

2) Stop engine and turn off the all electric switches.
3) Remove air cleaner assembly with air suction hose
referring to “Air Cleaner Assembly Removal and
Installation”.
4) Remove PCV hose (1) from PCV valve (2).
5) Connect special tool (Vacuum gauge) to PCV hose
(1).
Special tool
(A): 09915–67311
6) Blind PCV valve (2) using tape (3) or the like.I2RH0B140005-01
12
I5RW0C140038-01
(A)
1
2
3
I5RW0A140003-02