Starting system SUZUKI SX4 2006 1.G Service Repair Manual

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DTC ClearanceS6RW0D6304004
1) Turn ignition switch to OFF position.
2) Connect SUZUKI scan tool to data link connector
(DLC) (1) located on underside of instrument panel
at driver’s seat side.
Special tool
(A): SUZUKI scan tool3) Turn ignition switch to ON position.
4) Erase DTC according to the instructions displayed
on SUZUKI scan tool. For further details, refer to
operator’s manual for SUZUKI scan tool.
5) After completing the clearance, turn ignition switch to
OFF position and disconnect SUZUKI scan tool from
DLC.
DTC TableS6RW0D6304005
CAUTION!
Be sure to perform the “EPS System Check” before starting troubleshooting corresponding to each
DTC.

(A)
1I5RW0A630004-01
DTC No. Detecting itemDetecting condition
(DTC will set when detecting)Trouble area DTC“EPS”
warning
light
No
CODESNormal — — — —
) C1111Steering torque sensor
(Main) circuit voltageCircuit voltage of sensor main is
more than 4.5 V or less than 0.5
V
• Torque sensor signal
circuit
• Torque sensor
• P/S control module1 driving
cycle1 driving
cycle
)
C1113Steering torque sensor
(Main and Sub) circuit
correlationDifference between steering
torque calculated based on
sensor main signal and steering
torque calculated based on
sensor sub signal is more than
4.9 N⋅m
or
Difference between
instantaneous value and average
value of steering torque
calculated based on sensor main
signal and steering torque
calculated based on sensor sub
signal is more than 2.94 N⋅m1 driving
cycle1 driving
cycle
)
C1115Steering torque sensor
(Sub) circuit voltageCircuit voltage of sensor sub
signal is more than 4.5 V or less
than 0.5 V1 driving
cycle1 driving
cycle
)
C1116Steering torque sensor
power supply circuit Circuit voltage of torque sensor 9
V power supply is less than 7 V• Torque sensor 9 V
power supply circuit
• Torque sensor
• P/S control module1 driving
cycle1 driving
cycle

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Manual A/C Electronic Input Output TableS6RW0D7211002
A/C Operation Description at ECMS6RW0D7211003
ECM controls the A/C compressor relay and condenser cooling fan relay according to signals from HVAC control unit,
A/C refrigerant pressure sensor, ECT sensor and evaporator temperature sensor. The A/C switch ON signal from
HVAC control unit is transmitted to ECM through BCM. For CAN communication system, refer to “CAN
Communication System Description in Section 1A”.
ECM turns ON the A/C compressor relay when the vehicle state satisfy conditions described below.
• A/C switch ON signal is inputted from HVAC control unit
• A/C refrigerant pressure is within specified range
• Evaporator temperature is within specified range
• Engine speed is within specified range
• Engine coolant temperature is lower than specified value
• Throttle opening is lower than specified value
• Vehicle is not in either state of starting or quick acceleration
• ECT sensor malfunction is not detected
• A/C refrigerant pressure sensor malfunction is not detected
Condenser Cooling Fan Relay Control
ECM turn ON the condenser cooling fan relay at the same time when ECM turn ON the A/C compressor relay.
ECM
BCM
A/C switch Air intake selector
A/C refrigerant pressure sensor
A/C evaporator temperature sensorCompressor relay
ECT sensor
Condensor cooling fan relay
*
Wheel speed sensor (VSS)
HVAC control unit
Blower motor Blower motor resistor
Air intake control actuator
*Blower speed selector
ABS control module
I6RW0C721001-01
*: CAN communication

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HVAC Control DescriptionS6RW0D7221002
Temperature Control
HVAC control module calculates the target temperature
control door position based on signals from the
temperature selector, inside air temperature sensor,
outside air temperature sensor and sunload sensor and
controls the temperature control actuator so that the
current position of the temperature control door matches
its target position.
Fan Speed Control
HVAC control module calculates the target blower fan
speed based on signals from the temperature selector,
inside air temperature sensor, outside air temperature
sensor, ECT sensor and sunload sensor, compares it
with the current blower fan speed inputted from the
blower motor controller to control the current blower fan
speed to the target level.
Air Flow Outlet Control
HVAC control module calculates the target temperature
control door position based on signals from the
temperature selector, inside air temperature sensor,
outside air temperature sensor, ECT sensor and sunload
sensor. Using thus obtained target temperature control
door position, it further calculates the target air flow
control door position and controls the air flow control
actuator so that the current air flow control door position
becomes the target position.
Air Intake Position Control
HVAC control module determines the position of the air
intake control door based on signals from the
temperature selector, inside air temperature sensor,
outside air temperature sensor and sunload sensor and
selects any of the following positions by controlling the
position of the air intake control door.
• FRESH position (FRE)
• RECIRCULATION position (REC)
• MIX position (MIX)A/C Compressor Relay Control
HVAC control module outputs A/C switch ON signal to
ECM via BCM when the vehicle state satisfy conditions
described below.
• A/C switch is ON
• Evaporator temperature is higher than specified value
• Evaporator temperature sensor malfunction is not
detected
Communication of ECM and BCM is established by CAN
(Controller Area Network). (For more detail of CAN
communication, refer to “CAN Communication System
Description in Section 1A”).
ECM turns ON the A/C compressor relay when the
vehicle state satisfy conditions described below.
• A/C switch ON signal is inputted
• A/C refrigerant pressure is within specified range
• Engine speed is within specified range
• Engine coolant temperature is lower than specified
value
• Throttle opening is lower than specified value
• Vehicle is not in either state of starting or quick
acceleration
• ECT sensor malfunction is not detected
• A/C refrigerant pressure sensor malfunction is not
detected
Condenser Cooling Fan Relay Control
ECM turn ON the condenser cooling fan relay at the
same time when ECM turn ON the A/C compressor
relay.
Sub-Cool A/C System DescriptionS6RW0D7221003
Refer to “Sub-Cool A/C System Description”.

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DTC TableS6RW0D7224006
CAUTION!
Be sure to perform “Air Conditioning System Check” before starting diagnosis.

NOTE
• History DTC is such DTC which HVAC control module saves in its memory when it detects current
DTC for 60 seconds or more continuously.
• DTC B1504, B1541, B1546, B1570 and B1571 are displayed as a current DTC only when a current
malfunction is detected.
• When HVAC control module detects DTC B1513 and B1514, both current and history DTCs are
displayed at the same time.

DTC No.
(displayed
on SUZUKI
scan tool)Detection itemDTC (indicated on
HVAC control
module)
Condition when trouble detected (DTC is
determined when following condition detected)“A/C”
indicator
light Indicated
by “REC”
indicator
lightIndicated
by “FRE”
indicator
light
) B1502Inside Air
Temperature
Sensor Circuit
Malfunction21Signal voltage of inside air temperature sensor is
higher than specification.Flashed
22Signal voltage of inside air temperature sensor is
lower than specification.Flashed
) B1503Evaporator
Temperature
Sensor Circuit
Malfunction31Signal voltage of evaporator temperature sensor is
higher than specification. Flashed
32Signal voltage of evaporator temperature sensor is
lower than specification.Flashed
) B1504Sun load Sensor
Circuit
Malfunction41• Signal voltage of sun load sensor is higher than
specification.
• Without sunlight.—
42Signal voltage of sun load sensor is lower than
specification.Flashed
) B1511Temperature
Control Actuator
(Position Sensor)
and/or Its Circuit
Malfunction61Signal voltage of position sensor included in
temperature control actuator is higher than
specification.Flashed
62Signal voltage of position sensor included in
temperature control actuator is lower than
specification.Flashed
) B1512Air Flow Control
Actuator
(Position Sensor)
and/or Its Circuit
Malfunction71Signal voltage of position sensor included in airflow
control actuator is higher than specification. Flashed
72Signal voltage of position sensor included in airflow
control actuator is lower than specification.Flashed
) B1513Temperature
Control Actuator
(Motor) and/or Its
Circuit
Malfunction63
Motor of temperature control actuator is not
operated more than specified time.Flashed
) B1514Air Flow Control
Actuator (Motor)
and/or Its Circuit
Malfunction73Motor of air flow control actuator is not operated
more than specified time.Flashed
) B1520Temperature
Selector
Malfunction15 1Signal voltage of temperature selector in HVAC
control module is higher than specification.Flashed
15 2Signal voltage of temperature selector in HVAC
control module is lower than specification.Flashed

Downloaded from www.Manualslib.com manuals search engine 8A-5 Seat Belts:
Front Seat Belt Removal and InstallationS6RW0D8106002
WARNING!
• Never attempt to disassemble or repair the
retractor (seat belt pretensioner). If any
abnormality is found, be sure to replace it
with new one as an assembly.
• Be sure to read “Precautions on Service
and Diagnosis of Seat Belt” before starting
to work and observe every precaution
during work. Neglecting them may result in
personal injury or unactivation of the seat
belt pretensioner when necessary.

Removal
1) Disconnect negative (–) cable at battery.
2) Disable air bag system. Refer to “Disabling Air Bag
System in Section 8B”.
3) Remove center pillar lower trim.
4) Disconnect connector (1) from retractor (seat belt
pretensioner) (2) as following steps.
a) Unlock lock button (3) by pulling it.
b) After unlocked, disconnect connector.
5) Remove front seat belts from the vehicle.Installation
Install in reverse order of removal, noting the following.
• Seat belt anchor bolts should have an unified fine
thread (7/16-20 UNF). Under no circumstances
should any different sized or metric screw threads be
used.
• Connect seat belt pretensioner connector (1) to
retractor (seat belt pretensioner) securely as following
steps.
a. Make sure that lock button (2) is unlock position.
b. Insert connector to retractor (seat belt
pretensioner) until it stops with unlocked lock
button (2).
c. Lock connector securely by showing in lock button
(2).
• Enable air bag system. Refer to “Enabling Air Bag
System in Section 8B”.
2
1
3
I5RW0A810002-02
1
2
I5RW0A810003-03

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Front Seat Belt InspectionS6RW0D8106003
WARNING!
• Never attempt to disassemble or repair the
seat belt pretensioner (retractor). If any
abnormality is found, be sure to replace it
with new one as an assembly.
• Be sure to read “Precautions on Service
and Diagnosis of Seat Belt”, before
starting to work and observe every
precaution during work. Neglecting them
may result in personal injury or
unactivation of the seat belt pretensioner
when necessary.
• Never measure resistance of pretensioner
or disassemble it. Otherwise, personal
injury may result.

CAUTION!
If seat belt pretensioner (retractor) was
dropped from a height of 30 cm (1 ft) or more,
it should be replaced.

Seat belts and attaching parts can affect the vital
components and systems of a vehicle.
Therefore, they should be inspected carefully and
replaced with genuine parts only.
Seat Belt
• The seat belt webbing or strap should be free from
damage.
Retractor (with Seat Belt Pretensioner)
1) Let the seat belt retract fully to confirm its easy
retraction.
• The retractor should lock webbing when pulled
quickly.
• The front seat belt retractor (1) should pass the
inspection and should lock webbing even when
tilted (approx. 15°) toward the fore and aft or right
and left directions.2) Check retractor (1) with seat belt pretensioner
appearance visually for following symptoms and if
any one of them is applicable, replace it with a new
one as an assembly.
• Pretensioner has activated.
• There is a crack in seat belt pretensioner
(retractor).
• Seat belt pretensioner (retractor) is damaged or a
strong impact (e.g., dropping) was applied to it.
Anchor Bolt
• Anchor bolts should be torqued to specification.
Belt Latch
• It should be secure when latched.
Seat Belt Buckle Switch
Check driver side seat belt switch and passenger side
seat belt switch for continuity by using ohmmeter.
Seat belt switch specification
Without inserted buckle tongue to buckle catch:
Terminal “A” and “B”: Continuity
With inserted buckle tongue to buckle catch:
Terminal “A” and “B”: No continuityI2RH01810004-01
1. Buckle tongue
2. Buckle catch
I2RH01810005-01
I4RS0B810001-01

Downloaded from www.Manualslib.com manuals search engine 8B-1 Air Bag System:
Restraint
Air Bag System
Precautions
Precautions on Service and Diagnosis of Air
Bag System
S6RW0D8200004
WARNING!
• If the air bag system and another vehicle
system both need repair, SUZUKI
recommends that the air bag system be
repaired first, to help avoid unintended air
bag system activation.
• Do not modify the steering wheel,
dashboard, both front seat or any other on
or around air bag system components.
Modifications can adversely affect air bag
system performance and lead to injury.
• Be sure to follow the procedures described
in this section. Failure to follow
procedures could result in possible air bag
system activation, personal injury or
unneeded air bag system repairs.

• WARNING / CAUTION labels are attached on each
part of air bag system components (SDM, air bag
(inflator) modules and seat belt pretensioners). Be
sure to follow the instructions.
• Many of service procedures require disconnection of
“A/B” fuse and air bag (inflator) module(s) (driver
module, passenger module, side modules and curtain
modules) from initiator circuit to avoid an accidental
deployment.
• Do not apply power to the air bag system unless all
components are connected or a diagnostic flow
requests it, as this will set a DTC.
• The “Air Bag Diagnostic System Check” must be the
starting point of any air bag diagnostics. The “Air Bag
Diagnostic System Check” will verify proper “AIR
BAG” warning light operation and will lead you to the
correct flow to diagnose any air bag malfunctions.
Bypassing these procedures may result in extended
diagnostic time, incorrect diagnosis, and incorrect
parts replacements.
• Never use air bag component parts from another
vehicle.
• If the vehicle will be exposed to temperatures over 93
°C (200 °F) (for example, during a paint baking
process), remove the air bag system components
beforehand to avoid component damage or
unintended system activation.• When handling the air bag (inflator) modules (driver
module, passenger module, side modules and curtain
modules), seat belt pretensioners (driver module and
passenger module), SDM, forward impact-sensor or
side impact-sensor be careful not to drop it or apply
an impact to it. If an excessive impact was applied
(e.g., SDM, forward impact-sensor are dropped, air
bag (inflator) module is dropped from a height of 90
cm (3 ft) or more, seat belt pretensioner (retractor
assembly) is dropped from a height of 30 cm (1 ft) or
more), never attempt disassembly or repair but
replace it with a new one.
• When using electric welding, be sure to disconnect air
bag (inflator) module connectors (driver module,
passenger module, side modules and curtain
modules) and seat belt pretensioner connectors
(driver module and passenger module) respectively.
• When applying paint around the air bag system
related parts, use care so that the harness or
connector will not be exposed to the paint mist.
• Never expose air bag system component parts
directly to hot air (drying or baking the vehicle after
painting) or flames.
WARNING!
When performing service on or around air
bag system components or air bag wiring,
follow the procedures listed in “Disabling Air
Bag System” to temporarily disable the air
bag system.
Failure to follow procedures could result in
possible air bag system activation, personal
injury or unneeded air bag system repairs.

Precautions on Handling and Storage of Air Bag
System Components
S6RW0D8200002
SDM
WARNING!
Never power up air bag system when SDM is
not rigidly attached to the vehicle. Otherwise,
personal injury may result.

CAUTION!
After detecting one time of such collision as
to meet deployment conditions, SDM must
not be used. Refer to “Air Bag Diagnostic
System Check” when checking SDM.

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Diagnostic Information and Procedures
Air Bag Diagnostic System CheckS6RW0D8204001
WARNING!
To avoid deployment when troubleshooting
the air bag system, do not use electrical test
equipment such as a battery powered or AC
powered voltmeter, ohmmeter, etc., or any
type of electrical equipment other than that
specified in this manual. Do not use a non-
powered probe type tester.
Instructions in this manual must be followed
carefully, otherwise personal injury may
result.

CAUTION!
• The order in which DTCs are diagnosed is
very important. Failure to diagnose the
DTCs in the order specified may result in
extended diagnostic time, incorrect
diagnosis and incorrect parts replacement.
• When measurement of resistance or
voltage is required in the flow, use a tester
along with a correct terminal adapter from
special tool (Connector test adapter kit).
• When a check for proper connection is
required, refer to “Inspection of
Intermittent and Poor Connections”.
• If an open circuit in the air bag wire
harness damaged, connector or terminal is
found, replace the wire harness,
connectors and terminals as an assembly.

The diagnostic procedures used are designed to find
and repair air bag system malfunctions.
To get the best results, it is important to use the
diagnostic flow and follow the sequence in the following.
1) Perform the “Air Bag Diagnostic System Check
Flow”.
(The “Air Bag Diagnostic System Check Flow” must
be the starting point of any air bag system diagnosis.
The “Air Bag Diagnostic System Check Flow” checks
for proper “AIR BAG” warning light operation through
“AIR BAG” warning light and whether air bag DTCs
exist.)
2) Refer to the proper diagnostic flow as directed by the
“Air Bag Diagnostic System Check Flow”.
(The “Air Bag Diagnostic System Check Flow” will
lead you to the correct flow to diagnose any air bag
system malfunctions. Bypassing these procedures
may result in extended diagnostic time, incorrect
diagnosis and incorrect parts replacement.)
3) Repeat the “Air Bag Diagnostic System Check Flow”
after any repair or diagnostic procedures have been
performed.
(Performing the “Air Bag Diagnostic System Check
Flow” after all repair or diagnostic procedures will
ensure that the repair has been made correctly and
that no other malfunctions exist.)
A: Combination meter 6. Side curtain-air bag (inflator) module (8-
channel system)14. “A/B” fuse in junction block assembly
B: Steering wheel 7. Contact coil assembly 15. Air bag harness in main harness
C: Seat 8. Forward impact-sensor 16. Air bag harness in instrument panel harness
1. “AIR BAG” warning light 9. Apron-side-member (driver side) 17. Air bag harness in floor harness
2. Driver air bag (inflator) module 10. Side impact-sensor (8-channel system) 18. Side-air bag harness (8-channel system)
3. Passenger air bag facing cover 11. Side sill inner panel 19. Side curtain-air bag harness (8-channel
system)
4. Passenger air bag (inflator) module 12. SDM 20. Ground for air bag system
5. Side-air bag (inflator) module (8-channel
system)13. Seat belt pretensioner

Downloaded from www.Manualslib.com manuals search engine 8B-13 Air Bag System:
Air Bag Diagnostic System Check FlowS6RW0D8204002
CAUTION!
• Be sure to perform “Air Bag Diagnostic System Check” before starting diagnosis according to each
flow.
• When measurement of resistance or voltage is required in the flow, use a tester along with a correct
terminal adapter from special tool (Connector test adapter kit).
• When a check for proper connection is required, refer to “Inspection of Intermittent and Poor
Connections”.
• If an open circuit in the air bag wire harness damaged, connector or terminal is found, replace the
wire harness, connectors and terminals as an assembly.

Step Action Yes No
1Battery voltage check.
1) Measure battery voltage.
Is it 10 – 14 V?Go to Step 2. Proceed to “Battery
Inspection in Section
1J”.
2“AIR BAG” warning light check (6 times flushing check).
1) Turn ON ignition switch, and then check that “AIR BAG”
warning light flushes.
Does “AIR BAG” warning light flash 6 times?Go to Step 3. Go to Step 4.
3“AIR BAG” warning light check (turning off check).
1) In the state of Step 2. check that “AIR BAG” warning light
turn OFF after flashing 6 times.
Does “AIR BAG” warning light turn OFF?Go to Step 5. Go to Step 6.
4“AIR BAG” warning light circuit check
Does “AIR BAG” warning light come ON steady?Go to checking flow of
““AIR BAG” Warning
Light Comes ON
Steady”. After carrying
out it flow, proceed to
St ep 6 .Go to checking flow of
““AIR BAG” Warning
Light Does Not Come
ON”. After carrying out it
flow, proceed to Step 6.
5DTC check
1) Check DTC using SUZUKI scan tool referring to “DTC
Check”.
Is “NO CODES” displayed on SUZUKI scan tool?Air bag system is in
good condition.Check intermittent
troubles referring to
“Inspection of
Intermittent and Poor
Connections”.
If intermittent troubles
are OK, check and
repair applicable DTC
flow and then repeat
this flow.
6DTC check
1) Check DTC using SUZUKI scan tool, referring to “DTC
Check”.
Is “NO CODES” displayed on SUZUKI scan tool?Substitute a known-
good SDM and recheck.Check and repair
applicable DTC flow,
and then repeat this
flow.

Downloaded from www.Manualslib.com manuals search engine Air Bag System: 8B-94
5) Install driver and passenger side front pillar lower
trim.
6) Side-air bag (inflator) model:
Connect yellow connector (1) of side-air bag
(inflator) module by pushing connector till click is
heard from it.
7) Side curtain-air bag (inflator) model:
Connect yellow connector (1) of side curtain-air bag
(inflator) module by pushing connector till click is
heard from it.
8) Install right-side rear quarter lower trim.
9) Install “A/B” fuse to fuse box.
10) Connect negative (–) cable at battery.
11) Turn ignition switch to ON position and verify that
“AIR BAG” warning light flashes 6 times and then
turns OFF. If it does not operate as described,
perform “Air Bag Diagnostic System Check”.
SDM Removal and InstallationS6RW0D8206003
WARNING!
During service procedures, be very careful
when handling a Sensing and Diagnostic
Module (SDM).
Be sure to read “Precautions on Service and
Diagnosis of Air Bag System” before starting
to work and observe every precaution during
work. Neglecting them may result in personal
injury or inactivation of the air bag system
when necessary.

Removal
1) Disconnect negative (–) cable at battery.
2) Disable air bag system referring to “Disabling Air
Bag System”.
3) Remove console box referring to “Console Box
Components in Section 9H”.
4) Remove G sensor referring to “G Sensor Removal
and Installation (4WD Model) in Section 4E” and its
bracket (1).
5) Disconnect SDM connector (1) from SDM (2).
6) Remove SDM (2) from vehicle.
1
I5JB0A820070-01
1
I5RW0A820063-01
2. SDM
A: Forward
1
2
I5RW0A820064-01
2
1
A
I4RS0A820056-01