2006 SUZUKI SX4 Service Workshop Manual

Downloaded from www.Manualslib.com manuals search engine Brake Control System and Diagnosis: 4A-6
Dragging brakes (Without
a very light drag is
present in all brakes
immediately after pedal is
released)Master cylinder pistons not returning
correctlyReplace master cylinder.
Restricted brake pipes or hosesCheck for soft hoses or damaged pipes and
replace with new hoses and/or new brake
piping.
Incorrect parking brake adjustment on
rear brakesCheck and adjust to correct specifications.
Weakened or broken return springs in
the drum brakeReplace.
Sluggish parking brake cables or linkageRepair or replace.
Wheel cylinder or caliper piston stickingRepair as necessary.
Badly worn piston seal in caliperReplace piston seal.
Improper brake pedal free heightCheck brake pedal free height.
Pedal pulsation (Pedal
pulsates when depressed
for braking)Damaged wheel bearingsReplace wheel bearings.
Distorted steering knuckle or rear wheel
spindle or rear axle shaftReplace knuckle or rear wheel spindle or rear
axle shaft.
Excessive disc lateral runoutCheck per instructions. If not within
specifications, replace or machine disc.
Rear drums out of roundCheck runout.
Repair or replace drum as necessary.
Braking noiseGlazed brake pad and/or brake shoeRepair or replace brake pad and/or brake
shoe.
Worn or distorted brake shoeReplace brake shoe.
Loose front wheel bearingsReplace wheel hub.
Distorted backing plates or loose
mounting boltsReplace or retighten securing bolts.
Contact wear indicator to brake discReplace brake pads.
Brake warning light lights
after engine startParking brake appliedRelease parking brake and check that brake
warning light turns off.
Insufficient amount of brake fluidInvestigate leaky point, correct it and add
brake fluid.
Brake fluid leakingInvestigate leaky point, correct it and add
brake fluid.
Brake warning light circuit faultyRepair circuit.
Malfunctioning EBD systemCheck system referring to “EBD Warning Light
(Brake Warning Light) Comes ON Steady in
Section 4E”.
Brake warning light turns
on when brake is appliedBrake fluid leakingInvestigate leaky point, correct it and add
brake fluid.
Insufficient amount of brake fluidInvestigate leaky point, correct it and add
brake fluid.
Brake warning light fails
to turn on even when
parking brake is appliedBrake warning light circuit faultyReplace bulb or repair circuit.
ABS warning light turns
on after engine startMalfunctioning ABSCheck system referring to “ABS Check in
Section 4E”.
ABS warning light turns
on when brake is appliedMalfunctioning ABSCheck system referring to “ABS Check in
Section 4E”.
ABS warning light after
ignition switch has turned
ON Bulb burnt outReplace bulb.
Malfunctioning ABSCheck system referring to “ABS Check in
Section 4E”.
ABS warning light flashesNew ABS hydraulic unit / control module
assembly installed.Perform “ABS Hydraulic Unit Operation Check
in Section 4E”. Condition Possible cause Correction / Reference Item

Downloaded from www.Manualslib.com manuals search engine 4A-7 Brake Control System and Diagnosis:
Repair Instructions
Brake Pedal ComponentsS6RW0D4106018
CAUTION!
If equipped Brake Pedal Foot Protection
System, never disassemble brake pedal
assembly. Disassemble will spoil its original
function. If faulty condition is found, replace
it with new one.

Brake Pedal Free Height InspectionS6RW0D4106001
1) Check brake pedal free height. If it is not within
specification, check and adjust following item 2) and
6).
Brake pedal free height “a” from carpet
111 – 131 mm (4.4 – 5.1 in.)
2) Check measurement between booster mounting
surface and center of clevis pin hole. When booster
push rod clevis has been reinstalled, it is important
that the measurement is adjusted (refer to “Brake
Booster Inspection”).
3) Check brake light switch position. Adjust it if it is out
of specification.
4) Check pedal for dent.
5) Check brake booster for installation.6) Check brake booster push rod for length.
Brake Pedal Play InspectionS6RW0D4106002
Pedal play should be within the following specification. If
out of specification, check brake light switch for proper
installation position and adjust if necessary.
Also check pedal shaft bolt and booster clevis pin
installation for looseness and replace if defective.
Brake pedal play
“a”
: 1 – 8 mm (0.04 – 0.31 in.)
Excessive Pedal Travel InspectionS6RW0D4106003
1) Start engine.
2) Depress brake pedal a few times.
3) With brake pedal depressed with approximately 300
N (30 kg, 66 lbs) load, measure brake pedal to wall
(dash panel silencer) clearance “a”. If clearance is
out of specification, possible causes are as follows.
If clearance “a” is less than specification, the most
possible cause is that air is in lines or brake fluid
leakage.
Should clearance “a” remain less than specification
even after bleeding of system, other possible but
infrequent cause is malfunction of booster push rod
length out of adjustment.
• Bleed brake system. Refer to “Air Bleeding of
Brake System”.
Brake pedal arm to wall clearance
“a”
When pedal is depressed at 300 N (30 kg, 66 lbs)
: Over 40 mm (1.57 in.)
[A]: A/T model : 13 N⋅m (1.3 kgf-m, 9.5 lb-ft)
1. Brake pedal : 23 N⋅m (2.3 kgf-m, 16.5 lb-ft)
2. Brake pedal bracket
I6RW0C410004-01
I6RW0C410005-01
“a”I3RH0A410010-01
I6RW0C410006-01

Downloaded from www.Manualslib.com manuals search engine Brake Control System and Diagnosis: 4A-8
Brake Fluid Level InspectionS6RW0D4106004
CAUTION!
Do not use shock absorber fluid or any other
fluid which contains mineral oil. Do not use a
container which has been used for mineral oil
or a container which is wet from water.
Mineral oil will cause swelling and distortion
of rubber parts in hydraulic brake system and
water mixed into brake fluid will lower fluid
boiling point. Keep all fluid containers
capped to prevent contamination.

NOTE
Be sure to use particular brake fluid either as
indicated on reservoir cap of that vehicle or
recommended in owner’s manual which
comes along with that vehicle. Use of any
other fluid is strictly prohibited.
Fluid level should be between MIN and MAX
lines marked on reservoir.
When brake warning light lights sometimes
during driving, replenish fluid to MAX level.
When fluid decreases quickly, inspect brake
system for leakage. Correct leaky points and
then refill to specified level.

1) Check master cylinder, reservoir and reservoir hose
(if equipped) for crack, damage and brake fluid
leakage. If any faulty condition exists, correct or
replace.
2) Check that brake fluid level is between MAX (1) and
MIN marks (2) on reservoir.
Brake Light Switch AdjustmentS6RW0D4106005
Adjustment should be made as follows. Pull up brake
pedal toward you and while holding it there, adjust
switch position so that clearance between end of thread
and brake pedal is as specified. Then lock it by turning
clockwise.
Clearance between brake pedal and brake light
switch
“a”: 0.5 – 1.5 mm (0.02 – 0.05 in.)
Air Bleeding of Brake SystemS6RW0D4106006
CAUTION!
Brake fluid is extremely damaging to paint. If
fluid should accidentally touch painted
surface, immediately wipe fluid from paint
and clean painted surface.

Bleeding operation is necessary to remove air whenever
it entered hydraulic brake system.
Hydraulic lines of brake system are based on the
diagonal split system. When a brake pipe or hose was
disconnected at the wheel, bleeding operation must be
performed at both ends of the line of the removed pipe or
hose. When any joint part of the master cylinder of other
joint part between the master cylinder and each brake
(wheel) was removed, the hydraulic brake system must
be bled at all 4 wheel brakes.
NOTE
Perform bleeding operation starting with rear
brake caliper or wheel cylinder farthest from
master cylinder and then at front caliper of
the same brake line. Do the same on the
other brake line.

1
2
I7RW01410004-01
1. Right front brake caliper 3. Right rear wheel cylinder
2. Left front brake caliper 4. Left rear wheel cylinder
I5RW0A410005-01
I7RW01410005-01

Downloaded from www.Manualslib.com manuals search engine 4A-9 Brake Control System and Diagnosis:
1) Fill master cylinder reservoir with specified brake
fluid and keep at least one-half full of fluid during
bleeding operation.
Brake fluid
: Refer to reservoir cap
2) Remove bleeder plug cap. Attach a vinyl tube to
bleeder plug, and insert the other end into container.
3) Depress brake pedal several times, and then while
holding it depressed, loosen bleeder plug about one-
third to one-half turn.
4) When fluid pressure in cylinder is almost depleted,
retighten bleeder plug.
5) Repeat this operation until there are no more air
bubbles in hydraulic line.
6) When bubbles stop, depress and hold brake pedal
and tighten bleeder plug.
Tightening torque
Front brake caliper bleeder plug: 9 N·m (0.9 kgf-
m, 6.5 lb-ft)
Rear wheel cylinder bleeder plug: 8 N·m (0.8
kgf-m, 6.0 lb-ft)
7) Then attach bleeder plug cap.
8) After completing bleeding operation, apply fluid
pressure to pipe line and check for leakage.
9) Replenish fluid into reservoir up to specified level
referring to “Brake Fluid Level Inspection”.
10) Check brake pedal for sponginess. If found spongy,
repeat entire procedure of bleeding.
Front Brake Hose / Pipe Removal and
Installation
S6RW0D4106007
CAUTION!
Do not allow brake fluid to get on painted
surfaces. Painted surfaces will be damaged
by brake fluid, flush it with water immediately
if any fluid is spilled.

Removal
1) Raise and support vehicle properly. Remove tire and
wheel.
NOTE
This operation is not necessary when
removing pipes connecting master cylinder.

2) Clean dirt and foreign material from both flexible
hose end and pipe end fittings.
3) Drain brake fluid in reservoir.
4) Remove brake flexible hose or pipe.
Installation
Reverse brake flexible hose removal procedure, noting
the following.
• Make sure that steering wheel is in straight-forward
position and flexible hose has not twist or kink.
• Install clamps and tighten nuts referring to “Front
Brake Hose / Pipe Construction”.
• Install brake flexible hose (1) to caliper as shown in
figure.
Tightening torque
Flexible hose joint bolt (a): 23 N·m (2.3 kgf-m,
17.0 lb-ft)
I2RH01410016-01
I2RH01410017-01

Downloaded from www.Manualslib.com manuals search engine Brake Control System and Diagnosis: 4A-10
• Check to make sure that flexible hose doesn’t contact
any part of suspension, both in extreme right and
extreme left turn conditions. If it does at any point,
remove and correct. Fill and maintain brake fluid level
in reservoir.
• Bleed brake system. Refer to “Air Bleeding of Brake
System”.
• Perform brake test and check installed part for fluid
leakage.
Rear Brake Hose / Pipe Removal and
Installation
S6RW0D4106008
CAUTION!
Do not allow brake fluid to get on painted
surfaces. Painted surfaces will be damaged
by brake fluid, flush it with water immediately
if any fluid is spilled.

Removal
1) Raise and support vehicle properly. Remove tire and
wheel.
2) Clean dirt and foreign material from both flexible
hose end and pipe end fittings.
3) Drain brake fluid in reservoir.
4) Remove brake flexible hose or pipe.
Installation
Reverse brake flexible hose removal procedure, noting
the following.
• Install clamps and tighten nuts referring to “Rear
Brake Hose / Pipe Construction”.
• Fill and maintain brake fluid level in reservoir.
• Bleed brake system. Refer to “Air Bleeding of Brake
System”.
• Perform brake test and check each installed part for
fluid leakage.
• When installing hose, make sure that it has no twist or
kink.
Brake Hose and Pipe InspectionS6RW0D4106009
Hose
The brake hose assembly should be checked for road
hazard damage, for cracks and chafing of outer cover,
for leaks and blisters. A light and mirror may be needed
for an adequate inspection. If any above conditions are
observed on brake hose, it is necessary to replace it.
Pipe
Inspect the pipe for damage, cracks, dents and
corrosion. If any defect is found, replace it.
2. Location mark
3. Outside of vehicle
4. Inside of vehicle
I7RW01410007-02
I5RW0A410007-01

Downloaded from www.Manualslib.com manuals search engine 4A-11 Brake Control System and Diagnosis:
Master Cylinder and Brake Booster ComponentsS6RW0D4106010
CAUTION!
Never disassemble master cylinder and brake booster. Disassembly will spoil its original function.
If faulty condition is found, replace it with new one.

Master Cylinder Reservoir Removal and
Installation
S6RW0D4106011
CAUTION!
Do not allow brake fluid to get on painted
surfaces. Painted surfaces will be damaged
by brake fluid, flush it with water immediately
if any fluid is spilled.

Removal
1) Clean outside of reservoir and master cylinder.
2) Disconnect fluid level switch coupler (1) and clamp
(3) from reservoir (2).
4 2
2
1
(b) 10
9 8
7
11 12
6
3
5(a)
I7RW01410017-03
1. Reservoir 6. O-ring 11. Brake vacuum hose
: Be sure to direct location mark (12) to upward as
shown in figure.
2. Grommet
: Apply brake fluid. 7. Brake booster : 18N⋅m (1.8kgf-m, 13.0 lb-ft)
3. Master cylinder 8. Clevis pin : 13N⋅m (1.3kgf-m, 9.5lb-ft)
4. Reservoir connect pin 9. Clip : Do not reuse.
5. Master cylinder fixing nut 10. Gasket : Apply grease to piston rod
(Grease included in spare parts to master
cylinder or brake booster.)
2
13
I7RW01410009-01

Downloaded from www.Manualslib.com manuals search engine Brake Control System and Diagnosis: 4A-12
3) Drain brake fluid in reservoir.
4) Disconnect clutch reservoir hose from reservoir (M/T
model).
5) Remove reservoir connector pin (1) by using special
tool and then reservoir.
Special tool
(A): 09916–44310
Installation
1) When using new grommets (2), lubricate them with
the same fluid as the one to fill reservoir with.
Then press-fit grommets (2) to master cylinder (3).
2) Install reservoir (1) to master cylinder.
3) Drive in reservoir connector pin (2) by using special
tool (A). Till both of its ends at the right and left of
reservoir (1) becomes the same length.
Special tool
(A): 09916–44310 4) Connect clutch reservoir hose to reservoir (M/T
model).
5) Connect fluid level switch coupler (1) and clamp (3)
to reservoir (2).
6) Fill reservoir with specified brake fluid up to its MAX
level.
7) After completing the work, bleed air from brake
system referring to “Air Bleeding of Brake System”
and bleed air from clutch system referring to“Air
Bleeding of Clutch System in Section 5C” (M/T
model).
8) Check each installed parts for fluid leakage.
9) Perform brake test and check fluid leakage.
Master Cylinder Removal and InstallationS6RW0D4106012
Removal
CAUTION!
• Never disassemble master cylinder since
the master cylinder is supplied as
assembly parts.
If faulty condition is found, replace it with
new one.
• Do not allow brake fluid to get on painted
surfaces. Painted surfaces will be
damaged by brake fluid, flush it with water
immediately if any fluid is spilled.

1) Clean outside of master cylinder.
2) Disconnect fluid level switch coupler (1) and clamp
(3) from reservoir (2).
1 (A)I5JB0A410013-02
1
2
2
3
I7RW01410010-02
I7RW01410011-01
2
13
I7RW01410009-01
2
13
I7RW01410009-01

Downloaded from www.Manualslib.com manuals search engine 4A-13 Brake Control System and Diagnosis:
3) Drain brake fluid in reservoir.
4) Disconnect clutch reservoir hose from reservoir (M/T
model).
5) Disconnect brake pipes (1) connected to master
cylinder.
6) Remove master cylinder fixing nuts (2).
7) Remove master cylinder (3) and O-ring.
Installation
1) Install new O-ring (2) to master cylinder assembly
(1).
2) Apply grease to piston rod “A”.
Use specified grease in spare to master cylinder or
brake booster as supply parts.
3) Install master cylinder assembly (1) to brake booster
(3) and tighten master cylinder fixing nuts to
specified torque.
Tightening torque
Master cylinder fixing nut (a): 18 N·m (1.8 kgf-
m, 13.0 lb-ft)4) Connect brake pipe to master cylinder and tighten
flare nuts to specified torque.
Tightening torque
Brake pipe flare nut (a): 16 N·m (1.6 kgf-m, 11.5
lb-ft)
5) Connect clutch reservoir hose to reservoir and install
reservoir hose clamp (M/T model).
6) Connect fluid level switch connector and clamp.
7) Fill reservoir with specified brake fluid up to its MAX
level.
8) After completing the work, bleed air from brake and
clutch system referring to “Air Bleeding of Brake
System” and bleed air from clutch system referring to
“Air Bleeding of Clutch System in Section 5C” (M/T
model).
9) Check each installed parts for fluid leakage.
10) Check brake pedal for play referring to “Brake Pedal
Play Inspection”.
11) Perform brake test and check fluid leakage.
Master Cylinder InspectionS6RW0D4106013
• Depress brake pedal a few times and retain brake
pedal. If pedal gone down, replace the brake master
cylinder assembly.
• Check master cylinder for leakage, corrosion and
smooth operation.
• Inspect distance “a” to be the following.
If measurement is out of specification, replace master
cylinder assembly.
Distance
“a”: 72.0 mm (2.83 in.) or more
2
1
3I7RW01410012-01
(a)3
2
1
"A"
I7RW01410019-01
(a)I7RW01410013-01
I7RW01410014-01