2006 SUZUKI SX4 rear wheel

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4WD Control System DescriptionS6RW0D3201004
4WD Shift Control
The 4WD control module operates the coupling assembly according to the 2WD/4WD switch operation to the selected
position (2WD, 4WD-auto or 4WD-lock). Also, the 4WD control system has 4WD AUTO indicator and 4WD LOCK
indicator in order to inform the 4WD control system condition.
Indicator Operation
The 4WD control module output operation signal of the 4WD AUTO indicator and the 4WD LOCK indicator. Indicators
as follows in order to inform what state the 4WD control system is.
Function of 4WD Control System ComponentS6RW0D3201005
Operation
Condition
Indicator
4WD AUTO
indicatorOFF• Ignition switch is OFF.
• Vehicle is at “2WD” position or “4WD-lock” position.
ON• Within 2 seconds after ignition switch is turn ON (checking indicator
operation).
• Vehicle is at “4WD-auto” position.
• 4WD control module detects DTC of 4WD control system.
Blinking at intervals of 2
seconds continuously• 4WD control module detects the rotation difference of front wheel and
rear wheel and/or temperature of transfer more than specified
temperature.
4WD LOCK
indicatorOFF• Ignition switch is OFF.
• Vehicle is at “2WD” position or “4WD-auto” position.
ON• Within 2 seconds after ignition switch is turn ON (checking indicator
operation).
• Vehicle is at “4WD-lock” position.
• 4WD control module detects DTC of 4WD control system.
Part Name Function
2WD/4WD switch Output ON and OFF signal of 2WD/4WD switch to 4WD control module.
4WD AUTO indicator Indicates vehicle is at 4WD-auto position or not.
4WD LOCK indicator Indicates vehicle is at 4WD-lock position or not.
4WD control module • Controlled of current to coupling assembly and vehicle switching to each position.
• Diagnosis 4WD control system components.
• Output operation signal of indicator to BCM.
Coupling assembly The driving force of corresponding to the signal from 4WD control module transmitted
to the rear wheel.

Downloaded from www.Manualslib.com manuals search engine 3B-7 Differential:
CAN Communication System DescriptionS6RW0D3201010
Refer to “CAN Communication System Description in Section 1A” for CAN communication system description.
When 4WD control module receive the signal of abnormal as following information, vehicle is not changed to 4WD-
auto and 4WD-lock position.
4WD Control Module Transmission Data
4WD Control Module Reception Data
ECMCombination
Meter
TransmitDATA 4WD
4WD mode status
4WD auto mode
indication status
4WD lock mode
indication status
4WD diagnostic
trouble codes control
module
4WD clutch
engagement percent
ESP® hydraulic unit /
control module
(if equipped)
4WD clutch control
request impossibility
I7RW01320013-01
Accelerator position
Engine speedECM
DATA
Brake pedal switch signal
4WD
control
moduleWheel speed signal
(front right)
Wheel speed signal
(front left)
Wheel speed signal
(rear right)
Wheel speed signal
(rear left)

ABS hydraulic
unit /control
module
(if equipped)


ESP® hydraulic
unit /control
module
(if equipped)
ABS active
ESP® status signal
Clutch control request for
4WD active
Clutch control request
percent
Engine type signal
Engine torque signal
Receive
I7RW01320002-03

Downloaded from www.Manualslib.com manuals search engine 3B-13 Differential:
Scan Tool DataS6RW0D3204009
Scan Tool Data Definitions
Accel pedal Pos (Accelerator pedal position) (%)
Accelerator pedal opening ratio detected by signal on
CAN communication line fed from ECM.
Engine Speed (RPM)
This parameter indicates engine revolution calculated by
4WD control module.
4WD mode (2WD / AUTO / LOCK / ABS mode / Yaw
cont / ESP® req)
This parameter indicates 4WD mode according to 2WD/
4WD switch signal status detected by 4WD control
module.
4WD current (A)
This parameter indicates input current of coupling
assembly.
Battery voltage (V)
This parameter indicates battery voltage detected by
4WD control module.Coupling temp (°C, °F)
Coupling temperature detected by coupling air
temperature sensor installed in coupling assembly.
Wheel speed (F), Wheel speed (R) (km/h, mph)
Wheel speed is an ABS / ESP® control module internal
parameter. It is computed by reference pulses from the
wheel speed sensor.
F-R Wheel speed diff (Front-rear wheel speed
differential) (rpm)
This parameter indicates rotation difference between
front wheel and rear wheel detected by 4WD control
module.
4WD duty (%)
This parameter indicates operation rate of coupling
assembly. Scan tool data Vehicle conditionNormal condition / reference
values
) Accel pedal PosIgnition switch ON after
warmed up engineAccelerator pedal released 0 – 5%
Accelerator pedal depressed
fully90 – 100%
) Engine speed At engine idle speed Engine idle speed is display
) 4WD mode2WD/4WD switch selected to 2WD position 2WD
2WD/4WD switch selected to AUTO position AUTO
2WD/4WD switch selected to LOCK position LOCK
ABS operating ABS mode
Ignition switch ON and engine stop Relay off
Stability control operating Yaw cont
ESP® operating ESP® mode
) 4WD current Engine running 0 – 200 mA
) Battery voltage At engine idle speed 10 – 14 V
) Coupling temp Engine running –40 °C – 100 °C (–40 °F – 212 °F)
) Wheel speed (F) Vehicle stop 0 km/h, 0 MPH
) Wheel speed (R) Vehicle stop 0 km/h, 0 MPH
) F-R Wheel speed
DiffVehicle stop 0 rpm
) 4WD dutyIgnition switch ON and 2WD/4WD switch selected to
2WD position0%

Downloaded from www.Manualslib.com manuals search engine Differential: 3B-14
Rear Differential Symptom DiagnosisS6RW0D3204011
4WD Control Symptom DiagnosisS6RW0D3204012
Diagnose 4WD system after performing the following inspections.
• Perform 4WD control system check referring to “4WD Control System Check”. Condition Possible cause Correction / Reference Item
Gear noiseDeteriorated or water mixed lubricantRepair and replenish referring to “Rear
Differential Oil Change”.
Inadequate or insufficient lubricantRepair and replenish referring to “Rear
Differential Oil Change”.
Maladjusted backlash between drive
bevel pinion and gearAdjust as prescribed referring to “Rear
Differential Disassembly and Reassembly”.
Improper tooth contact in the mesh
between drive bevel pinion and gearAdjust or replace referring to “Rear Differential
Disassembly and Reassembly”.
Loose drive bevel gear securing boltsReplace or retighten referring to “Rear
Differential Disassembly and Reassembly”.
Damaged differential gear(s) or
differential pinion(s)Replace referring to “Rear Differential
Inspection”.
Bearing noise(Constant noise) Deteriorated or water
mixed lubricantRepair and replenish referring to “Rear
Differential Oil Change”.
(Constant noise) Inadequate or
insufficient lubricantRepair and replenish referring to “Rear
Differential Oil Change”.
(Noise while coasting) Damaged
bearing(s) of drive bevel pinionReplace referring to “Rear Differential
Inspection”.
(Noise while turning) Damaged
differential side bearing(s) or axle
bearing(s)Replace referring to “Rear Differential
Inspection”.
Oil leakageClogged breather plugClean.
Worn or damaged oil sealReplace.
Excessive oilAdjust oil level referring to “Rear Differential Oil
Change”.
Loose differential carrier boltsReplace or retighten.
Condition Possible cause Correction / Reference Item
4WD system does not
operate2WD/4WD switch faultyCheck switch referring to “2WD/4WD Switch
Inspection”.
Coupling air temperature sensor faultyCheck coupling air temperature sensor
referring to “Coupling Air Temperature Sensor
Inspection”.
Coupling assembly faultyCheck coupling assembly referring to
“Coupling Assembly Inspection”.
Wiring or grounding faultyRepair as necessary.
4WD control module faultyCheck 4WD control module referring to
“Inspection of 4WD Control Module and Its
Circuits”.
MAF sensor faultyCheck MAF sensor and its circuit.
Accelerator pedal position (APP) sensor
faultyCheck accelerator pedal position (APP) sensor
and its circuit.
CKP sensor faultyCheck CKP sensor and its circuit.
Front and/or rear wheel speed sensor
faultyCheck front and/or rear wheel speed sensor
and its circuit.
Steering angle sensor faultyCheck steering angle sensor and its circuit.
ABS / ESP® control module faultyCheck ABS / ESP
® control module and its
circuit.
ECM faultyCheck ECM and its circuit.
NoiseDamaged or worn bearing(s)Refer to “Rear Differential Inspection”.

Downloaded from www.Manualslib.com manuals search engine Differential: 3B-50
09922–76150 09922–76250
Bevel pinion nut Bevel gear dummy
) / )) / )
09922–76330 09922–76340
Bevel pinion rear collar Bevel pinion rear collar
) / ) / )) / ) / )
09922–76420 09922–76530
Bevel pinion front collar Bevel pinion gauge block
) / ) / )) / )
09922–85811 09925–18011
Spring pin remover (4.5 mm) Transmission gear, bush
and bearing installer
) / ))
09925–88210 09926–48010
Bearing puller attachment Universal joint assembling
tool
) / )) / )
09927–27910 09930–40113
Holder, bevel pinion Flywheel rotor holder
) / )) / )
09951–26020 SUZUKI scan tool
Bush remover & installer
support—
) / )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 Table of Contents 4- i
4
Section 4
CONTENTS
Brakes
Precautions ................................................. 4-1
Precautions............................................................. 4-1
Precautions for Brakes .......................................... 4-1
Brake Control System and Diagnosis ... 4A-1
Precautions........................................................... 4A-1
Precautions on Brake .......................................... 4A-1
General Description ............................................. 4A-1
Brakes Construction ............................................ 4A-1
Brake Pedal Foot Protection System
Construction (If Equipped) ................................ 4A-2
Front Brake Hose / Pipe Construction................. 4A-3
Rear Brake Hose / Pipe Construction ................. 4A-4
Diagnostic Information and Procedures ............ 4A-4
Brakes Diagnosis Note ....................................... 4A-4
Brakes Symptom Diagnosis ................................ 4A-5
Repair Instructions .............................................. 4A-7
Brake Pedal Components ................................... 4A-7
Brake Pedal Free Height Inspection ................... 4A-7
Brake Pedal Play Inspection ............................... 4A-7
Excessive Pedal Travel Inspection ..................... 4A-7
Brake Fluid Level Inspection ............................... 4A-8
Brake Light Switch Adjustment ........................... 4A-8
Air Bleeding of Brake System ............................. 4A-8
Front Brake Hose / Pipe Removal and
Installation ......................................................... 4A-9
Rear Brake Hose / Pipe Removal and
Installation ....................................................... 4A-10
Brake Hose and Pipe Inspection ....................... 4A-10
Master Cylinder and Brake Booster
Components.................................................... 4A-11
Master Cylinder Reservoir Removal and
Installation ....................................................... 4A-11
Master Cylinder Removal and Installation......... 4A-12
Master Cylinder Inspection ............................... 4A-13
Booster Operation Inspection ........................... 4A-14
Brake Booster Removal and Installation ........... 4A-15
Brake Booster Inspection .................................. 4A-15
Booster Push Clevis Rod Adjustment ............... 4A-16
Specifications..................................................... 4A-16
Tightening Torque Specifications ...................... 4A-16
Special Tools and Equipment ........................... 4A-16
Recommended Service Material ....................... 4A-16
Special Tool ...................................................... 4A-16
Front Brakes ............................................ 4B-1
Repair Instructions ..............................................4B-1
Front Disc Brake Components ............................ 4B-1
Front Disc Brake Pad On-Vehicle Inspection ...... 4B-2
Front Disc Brake Pad Removal and
Installation ......................................................... 4B-2
Front Disc Brake Pad Inspection......................... 4B-3
Front Disc Brake Caliper Removal and
Installation ......................................................... 4B-3
Front Disc Brake Caliper Disassembly and
Assembly........................................................... 4B-4
Front Disc Brake Caliper Inspection.................... 4B-6
Front Brake Disc Removal and Installation ......... 4B-6
Front Brake Disc Inspection ................................ 4B-7
Specifications .......................................................4B-8
Tightening Torque Specifications ........................ 4B-8
Special Tools and Equipment .............................4B-8
Recommended Service Material ......................... 4B-8
Special Tool ........................................................ 4B-8
Rear Brakes.............................................. 4C-1
Repair Instructions ..............................................4C-1
Rear Drum Brake Components ...........................4C-1
Rear Brake Drum Removal and Installation ........4C-2
Rear Brake Drum and Shoe Inspection ..............4C-2
Rear Brake Shoe On-Vehicle Inspection ............4C-3
Rear Brake Shoe Removal and Installation ........4C-3
Rear Brake Shoe Inspection ...............................4C-4
Wheel Cylinder Removal and Installation ...........4C-4
Wheel Cylinder Inspection ..................................4C-5
Brake Back Plate Removal and Installation ........4C-5
Specifications .......................................................4C-6
Tightening Torque Specifications ........................4C-6
Special Tools and Equipment .............................4C-6
Recommended Service Material .........................4C-6
Parking Brake .......................................... 4D-1
General Description .............................................4D-1
Parking Brake Cable Construction ......................4D-1
Repair Instructions ..............................................4D-2
Parking Brake Inspection and Adjustment ..........4D-2
Parking Brake Cable Removal and
Installation .........................................................4D-2
Parking Brake Lever Removal and Installation ....4D-3

Downloaded from www.Manualslib.com manuals search engine 4-ii Table of Contents
Specifications .......................................................4D-4
Tightening Torque Specifications ........................4D-4
ABS ............................................................4E-1
Precautions........................................................... 4E-1
Precautions in Diagnosing Troubles ................... 4E-1
Precautions in On-Vehicle Service...................... 4E-1
General Description ............................................. 4E-2
ABS Description .................................................. 4E-2
ABS Hydraulic Unit / Control Module
Assembly Description ....................................... 4E-3
CAN Communication System Description........... 4E-3
Schematic and Routing Diagram ........................ 4E-4
ABS Schematic ................................................... 4E-4
ABS Wiring Circuit Diagram ................................ 4E-5
Component Location ........................................... 4E-8
ABS Components Location ................................. 4E-8
Diagnostic Information and Procedures ............ 4E-8
ABS Check .......................................................... 4E-8
ABS Warning Light Check................................. 4E-10
EBD Warning Light (Brake Warning Light)
Check .............................................................. 4E-10
DTC Check........................................................ 4E-11
DTC Table ......................................................... 4E-11
DTC Clearance ................................................. 4E-11
Scan Tool Data ................................................. 4E-12
ABS Warning Light Does Not Come ON at
Ignition Switch ON .......................................... 4E-13
ABS Warning Light Comes ON Steady ............. 4E-15
EBD Warning Light (Brake Warning Light)
Comes ON Steady .......................................... 4E-16
Serial Data Link Circuit Check .......................... 4E-17
DTC C1013: Control Module Mismatch ............ 4E-20
DTC C1015: G Sensor Circuit (4WD Model)..... 4E-21
DTC 1016: Brake Light Switch .......................... 4E-22
DTC C1021 / C1022 / C1025 / C1026 / C1031
/ C1032 / C1035 / C1036: Wheel Speed
Sensor Circuit / Sensor or Encoder ................ 4E-23
DTC C1033: Wheel Speed Sensor Deviation ... 4E-25
DTC C1041 / C1042 / C1045 / C1046 / C1051
/ C1052 / C1055 / C1056: Inlet / Outlet
Solenoid .......................................................... 4E-26DTC C1057: Power Supply Voltage Too High
/ Too Low ........................................................ 4E-27
DTC C1061: Pump Motor Circuit ...................... 4E-28
DTC C1063: Solenoid Valve Power Supply
Driver Circuit ................................................... 4E-29
DTC C1071: Control Module Internal Defect .... 4E-30
ABS Hydraulic Unit / Control Module
Assembly Power and Ground Circuit Check ... 4E-30
Repair Instructions ............................................ 4E-31
ABS Hydraulic Unit Operation Check................ 4E-31
ABS Hydraulic Unit / Control Module
Assembly Components ................................... 4E-32
ABS Hydraulic Unit / Control Module
Assembly On-Vehicle Inspection .................... 4E-33
ABS Hydraulic Unit / Control Module
Assembly Removal and Installation ................ 4E-33
Front and Rear Wheel Speed Sensor On-
Vehicle Inspection ........................................... 4E-34
Front Wheel Speed Sensor Removal and
Installation ....................................................... 4E-35
Front and Rear Wheel Speed Sensor
Inspection ........................................................ 4E-36
Rear Wheel Speed Sensor Removal and
Installation (4WD Model) ................................. 4E-36
Rear Wheel Speed Sensor Removal and
Installation (2WD Model) ................................. 4E-36
Front Wheel Speed Sensor Encoder On-
Vehicle Inspection ........................................... 4E-37
Front Wheel Speed Sensor Encoder Removal
and Installation ................................................ 4E-37
Rear Wheel Speed Sensor Encoder On-
Vehicle Inspection ........................................... 4E-37
Rear Wheel Speed Sensor Encoder Removal
and Installation ................................................ 4E-37
G Sensor Removal and Installation (4WD
Model) ............................................................. 4E-38
G Sensor Inspection (4WD Model) ................... 4E-38
Specifications ..................................................... 4E-39
Tightening Torque Specifications ...................... 4E-39
Special Tools and Equipment ........................... 4E-39
Special Tool ...................................................... 4E-39

Downloaded from www.Manualslib.com manuals search engine 4A-1 Brake Control System and Diagnosis:
Brakes
Brake Control System and Diagnosis
Precautions
Precautions on BrakeS6RW0D4100001
Air Bag Warning
Refer to“Air Bag Warning in Section 00”.
Brakes Diagnosis Note
Refer to “Brakes Diagnosis Note”.
General Description
Brakes ConstructionS6RW0D4101001
When the foot brake pedal is depressed, hydraulic pressure is developed in the master cylinder to actuate pistons (two
in front and four in rear).
The master cylinder is a tandem master cylinder. Brake pipes are connected to the master cylinder and they make two
independent circuits. One connects front right & rear left brakes and the other connects front left & rear right brakes.
In this brake system, the disc brake is used for the front wheel brake and drum brake (leading / trailing shoes) for the
rear brake.
The parking brake system is mechanical. It applies brake force to only rear wheels by means of the cable and
mechanical linkage system. The same brake shoes of rear drum brake are used for both parking and foot brakes.
NOTE
• The figures show LH steering vehicle.
• The difference between RH steering vehicle and LH steering vehicle is the location of the brake
master cylinder, the brake booster and ABS hydraulic unit / control module assembly.

A
421
37
7
658
I7RW01410001-01
1. Brake booster 4. Primary side 7. Parking brake cable
2. Master cylinder 5. ABS hydraulic unit / control module assembly 8. 4-way joint
3. Secondary side 6. Parking brake lever A: Forward