brakes FORD FIESTA 2007 Owner's Manual

206-00-1 0 Brake System - General Information 206-00-1 0
DIAGNOSIS AND TESTING
Pinpoint Tests
PINPOINT TEST A : BRAKES PULL OR DRIFT
TEST CONDITIONS
DETAILSIRESU LTSIACTIONS
A1 : ROAD TEST THE VEHICLE
Road test the vehicle and apply the brake pedal.
Does the vehicle pull or drift?
+ Yes
GO to A2.
+ No
Vehicle OK.
A2: TIRE INSPECTION
Check for excessive wear or incorrect tire pres-
sures.
Are the tires in good condition?
-, Yes
GO to A3.
+ No
INFLATE the tires to the correct pressure.
INSTALL new tires if excessively worn. TEST
the system for normal operation.
A3: BRAKE SHOE OR BRAKE PADS AND LINING INSPECTION
Inspect the brake shoes or brake pads for
grease or fluid on the linings and or wear
concerns.
Are any concerns present?
+ Yes
INSTALL new brake shoes or brake pads.
REFER to:
Brake Shoes (206-02 Drum Brake, Removal and
Installation),
Brake Pads (206-03 Front Disc Brake, Removal
and Installation),
Brake Pads (206-04 Rear Disc Brake, Removal
and Installation).
TEST the system for normal operation.
+ No
GO to A4.
2006.0 Fiesta 1212006 G28494en
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206-00-1 3 Brake System - General Information 206-00-1 3
DIAGNOSIS AND TESTING
TEST CONDITIONS DETAILSIRESU LTSIACTIONS
I B2: CHECK BRAKE SYSTEM FOR LEAKAGE 1
rn Check the brake master cylinder reservoir
sealing points and external brake and clutch
system for leaks. Refer to the brake master
cylinder component tests in this section.
Does the system leak?
-+ Yes
REPAIR as necessary. ADD fluid and BLEED
the brake system. REFER to: (206-00 Brake
System
- General Information)
Brake System Bleeding (General Procedures),
Brake System Pressure Bleeding (General Procedures).
TEST the system for normal operation.
183: CHECK BRAKE WARNING SWITCH OR WIRING I
I rn Ignition switch in position II. I
Remove the brake master cylinder reservoir
filler cap or switch. Allow the float to rest at its
lowest point.
Does the brake warning indicator illuminate?
-+ Yes
The switch or wiring is OK. TEST the system
for normal operation.
-+ No
REFER to: lnstrument Cluster - Vehicles Built I Up To: 1012005 (41 3-01 Instrument Cluster,
I Diagnosis and Testing).
PINPOINT TEST C : VIBRATION WHEN BRAKES ARE APPLIED
TEST CONDITIONS
DETAl LSIRESU LTSIACTIONS
Cl : ROAD TEST THE VEHICLE
Road test the vehicle without applying the
brakes at 40-80 kmlh (25-50 mph).
Is a vibration present?
-+ Yes
REFER to: Noise, Vibration and Harshness
(NVH) (1 00-04 Noise, Vibration and Harsh-
ness, Diagnosis and Testing).
After servicing, TEST the system for normal operation.
-+ No
GO to C2.
2006.0 Fiesta 1212006 G28494en
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206-00-1 6 Brake System - General Information 206mOO-16
DIAGNOSIS AND TESTING
TEST CONDITIONS
2006.0 Fiesta 12/2006 G28494en
D3: PRESSURIZE THE SYSTEM
D4: CHECK FOR BRAKE SYSTEM LEAKS
Pump the foot brake rapidly five times.
Does the brake pedal height build up and then
hold?
+ Yes
CHECK parking brake adjustment and
ADJUST as necessary. REFER to: (206-05
Parking Brake and Actuation)
Parking Brake Cable Adjustment
- Vehicles With:
Rear Drum Brakes (General Procedures),
Parking Brake Cable Adjustment
- Vehicles With:
Rear Disc Brakes (General Procedures).
If the condition still exists. BLEED the brake
system. REFER to: (206-00 Brake System
-
General Information)
Brake System Bleeding (General Procedures),
Brake System Pressure Bleeding (General
Procedures). TEST the system for normal operation.
+ No
GO to D4.
Check for external brake and clutch system
leaks. REFER to the component tests.
Are any leaks found?
+ Yes
REPAIR as necessary. ADD fluid and BLEED
the brake system. REFER to: (206-00 Brake
System
- General Information)
Brake System Bleeding (General Procedures),
Brake System Pressure Bleeding (General
Procedures). TEST the system for normal operation.
+ No
GO to D5.
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206-00-20 Brake System - General Information 206=00-20
DIAGNOSIS AND TESTING
TEST CONDITIONS
DETAILSIRESULTSIACTIONS
F4: BLEED THE BRAKE SYSTEM
rn Check for air in the brake system. Bleed the
brake system. REFER to: (206-00 Brake System
- General lnformation)
Brake System Bleeding (General Procedures),
Brake System Pressure Bleeding (General Procedures)
.
Is the condition still present?
+ Yes
GO to F5.
+ No
Vehicle OK.
F5: CHECK FRONT WHEEL HUB RETAINING NUT
Check the front wheel hub retaining nut for
looseness.
Is the front wheel hub retaining nut loose?
+ Yes
INSTALL a new front wheel hub retaining nut.
REFER to: Specifications (204-01 Front
Suspension, Specifications).
Do not reuse the
frontwheel hub retaining nut.
TEST the system for normal operation.
+ No
CHECK the parking bake adjustment. REFER
to: (206-05 Parking Brake and Actuation)
Parking Brake Cable Adjustment
- Vehicles With:
Rear Drum Brakes (General Procedures),
Parking Brake Cable Adjustment
- Vehicles With:
Rear Disc Brakes (General Procedures).
PINPOINT TEST G
: BRAKE LOCK UP DURING LIGHT BRAKE PEDAL FORCE
TEST CONDITIONS
DETAILSIRESULTSIACTIONS
I GI : ROAD TEST-THE VEHICLE I
Road test the vehicle and apply the brake pedal
lightly.
Do the rear brakes lock up?
+ Yes
GO to G2. GO to Pinpoint Test G.
+ No
Vehicle OK.
2006.0 Fiesta 12/2006 G28494en
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206-00-22 Brake System - General Information 206100-22
DIAGNOSIS AND TESTING
TEST CONDITIONS DETAILSIRESULTSIACTIONS
G5: CHECK PRESSURE CONSCIOUS REDUCING VALVE-LEFT-HAND REAR
Install pressure gauges in the right-hand front
and left-hand rear bleed nipples. Apply the brake
to read 6895
kPa (1000 psi) at the right-hand
front wheel.
- Read the pressure at the left-hand rear wheel.
Does the pressure gauge read between 4692-
5164
kPa (680-750 psi) at the lefl-hand rear
wheel?
-+ Yes
TEST the brake booster. Go to Pinpoint Test
I.
-+ No
INSTALL a new left-hand rear brake pressure
control valve. BLEED the brake system.
REFER to: (206-00 Brake System
- General
Information)
Brake System Bleeding (General Procedures),
Brake System Pressure Bleeding (General
Procedures).
TEST the system for normal operation.
PINPOINT TEST H
: EXCESSIVE OR ERRATIC BRAKE PEDAL TRAVEL
TEST CONDITIONS
DETAILS/RESULTSlACTIONS
HI : ROAD TEST THE VEHICLE
Road test the vehicle under rough road condi-
tions. Apply the brakes slowly.
Is the pedal travel OK?
-+ Yes
Vehicle OK.
+ No
GO to H2.
2006.0 Fiesta 12/2006 G28494en
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206-00-23 Brake System - General Information 206-00-23
DIAGNOSIS AND TESTING
TEST CONDITIONS DETAILSIRESULTSIACTIONS
H2: CHECK WHEEL BEARING
rn Check for loose front wheel bearings.
Are the front wheel bearings loose?
-, Yes
CHECK the front wheel hub retaining nut.
INSTALL a new front wheel
bearing(s) if worn
or damaged,
REFER to: Front Wheel Bearing (204-01 Front
Suspension, Removal and Installation).
TEST the system for normal operation.
-, No
CHECK the front brake disc(s) for thickness
variances.
REFER to: Specifications (206-03 Front Disc
Brake, Specifications).
INSTALL new components as necessary.
TEST the system for normal operation.
PINPOINT TEST I : BRAKES DRAG
TEST CONDITIONS
DETAILSIRESU LTSIACTIONS
11: CHECK BRAKE BOOSTER
rn Check the brake booster push rod alignment
and pedal travel.
Is the push rod and pedal travel OK?
-+ Yes
GO to 12.
+ No
INSTALL a new brake booster. REFER to:
(206-07 Power Brake Actuation)
Brake Booster
- LHD (Removal and Installation),
Brake Booster
- RHD (Removal and Installation).
TEST the system for normal operation.
2006.0 Fiesta 1212006 G28494en
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206-00-24 Brake System - General Information 206-00-24
DIAGNOSIS AND TESTING
TEST CONDITIONS DETAILSIRESU LTSIACTIONS
12: ROAD TEST THE VEHICLE
rn Road test the vehicle and apply the brakes.
Are the brakes functioning correctly?
-+ Yes
Vehicle OK.
+ No
INSPECT individual wheel cylinders or
calipers for binding or sticking components.
INSTALL new components as necessary.
BLEED the brake system. REFER to: (206-00
Brake System
- General Information)
Brake System Bleeding (General Procedures),
Brake System Pressure Bleeding (General Procedures).
TEST the system for normal operation.
PINPOINT TEST J
: EXCESSIVE BRAKE PEDAL EFFORT
TEST CONDITIONS
DETAILSIRESULTSIACTIONS
J1: CHECK BRAKE APPLICATION
With the engine off, apply and release the brake
pedal five times to deplete all vacuum from the
brake booster. Apply the brake pedal, hold with
light pressure. Start the engine.
Does the brake pedal hold?
+ Yes
GO to J2.
+ No
GO to J6.
52: CHECK BRAKE BOOSTER FOR LEAKS
rn Run the engine at medium idle, release the
accelerator pedal and turn the engine off. Wait
90 seconds and apply the brakes. Two or more
brake applications should be power assisted.
Does the brake booster work?
+ Yes
Vehicle OK.
-+ No
GO to
J3.
2006.0 Fiesta 1212006 G28494en
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206-00-28 Brake System - General Information 206-00-28
DIAGNOSIS AND TESTING
PINPOINT TEST L : SLOW OR INCOMPLETE BRAKE PEDAL RETURN
TEST CONDITIONS
DETAILSIRESU LTSIACTIONS /"'
I L1: CHECK FOR BRAKE PEDAL RETURN I[<.
Run the engine at fast idle while making several
brake applications. Pull the brake pedal rear-
ward with approximately 44.5 N
(1 0 lbs) force.
Release the brake pedal and measure the
distance to the floor pan. Make a hard brake
application. Release the brake pedal and
measure the brake pedal to floor pan distance.
The brake pedal should return to its original
position.
Did the brake pedal return to its original posi-
tion?
+ Yes
Vehicle OK.
+ No
GO to L2.
I L2: CHECK FOR BRAKE PEDAL BINDING
1 171 Check the brake pedal for free operation.
I Is the brake pedal operating freely?
+ Yes
I INSTALL a new brake booster. REFER to:
(206-07 Power Brake Actuation)
Brake Booster
- LHD (Removal and lnstallation),
Brake Booster
- RHD (Removal and lnstallation).
TEST the system for normal operation.
+ No
REPAIR or INSTALL new brake pedal bush-
ings. REFER to: (206-06 Hydraulic Brake
Actuation)
Brake Pedal
- LHD, Vehicles With: Manual
Transaxle (Removal and lnstallation),
Brake Pedal
- LHD, Vehicles With: 4-Speed
Automatic Transmission
(AW81-40), Vehicles
With: Automated Gearshift (Removal and
Installation),
Brake Pedal
- RHD (Removal and lnstallation).
TEST the system for normal operation.
Component Tests It is possible that all evidence of fluid leakage may
have washed off if the vehicle has been operated
in rain or snow, as brake fluid is water-soluble.
Hydraulic Leak Check Refill the system, bleed then apply the brakes
several times. Examine the system to verify that
NOTE:Thet-e is a common clutch and brake fluid
the reservoir fluid level is actually dropping. Locate
reservoir, therefore it is possible that a clutch leak
can lead to reduction in the reservoir level.
-- --
2006.0 Fiesta 1212006 G28494en
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Brake System - General Information
DIAGNOSIS AND TESTING
evidence of a brake concern. Check for the brake
warning indicator illumination and the fluid level in
the master cylinder reservoir.
Normal Conditions
The following conditions are considered normal
and are not indications that the brake master
cylinder is in need of service.
- Modern brake systems are not designed to
produce as hard a pedal effort as in the past.
Complaints of light pedal efforts should be
compared to pedal efforts of another vehicle, of
the same model and year.
- During normal operation of the brake the fluid
level in the reservoir will rise during brake
application and fall during release. The net fluid
level
(i.e., after brake application and release)
will remain unchanged.
- A trace of brake fluid will exists on the brake
booster shell below the master cylinder
mounting flange. This results from the normal
lubricating action of the master cylinder bore
end seal.
- The fluid level will fall with brake shoe and lining
wear.
Abnormal Conditions
N0TE:Prior to performing any diagnosis, make
sure the brake system warning indicator is
functional.
Changes in brake pedal feel or travel are indicators
that something could be wrong with the braking system. The diagnostic procedure and techniques
use brake pedal feel, warning indicator illumination
and low brake fluid level as indicators in diagnosing
braking system concerns. The following conditions
are considered abnormal and indicate that the
brake master cylinder is in need of service.
- The brake pedal effort is excessive. This may
be caused by a bind or obstruction in the pedal
.
or linkage, clogged fluid control valve or ( ' insufficient booster vacuum.
- The rear brakes lock up during light pedal force.
This may be caused by incorrect tire pressures,
grease or fluid on the brake shoes and linings,
damaged brake shoes and linings, incorrectly
adjusted parking brake, or damaged or
contaminated brake pressure control valves.
- The brake pedal effort is erratic. This condition
could be caused by a brake booster malfunction,
extreme caliper piston knock back or incorrectly
installed brake shoes and linings.
- The brake warning indicator is ON. This may
be caused by low fluid level, ignition wire routing
too close to the fluid level indicator assembly,
or float assembly damage.
Bypass Condition Test
1. Check the fluid in brake master cylinder. Fill the
brake master cylinder reservoir if low or empty.
2. Observe the fluid level in the brake master
cylinder reservoir. If after several brake
applications, the fluid level remains the same,
measure the wheel turning torque required to
rotate the wheels with the brakes applied as
follows:
Place the transaxle in NEUTRAL and raise and
support the vehicle. REFER to: (1 00-02 Jacking
and Lifting)
Jacking (Description and Operation),
Lifting (Description and Operation).
Apply the brakes with a minimum of 445 N (100
Ib) and hold for approximately 15 seconds. With
the brakes still applied, exert a torque on the front
wheels of 10.1 Nm (75
1b.R). If either wheel rotates,
install a new brake master cylinder. REFER to:
(206-06 Hydraulic Brake Actuation)
- The brake pedal goes down fast. This could be Brake Master Cylinder - RHD (Removal and
caused by an external or internal leak. Installation),
- The brake
pedal eases down slowly. This could Brake Master Cylinder - LHD
(Removal and
be caused by an external or internal leak. Installation).
- The
brake pedal is low and or feels spongy. This
condition may be caused by no fluid in the brake
Non-Pressure Leaks master cylinder reservoir, reservoir cap vent
holes clogged or air in the hydraulic system.
Any empty brake master cylinder reservoir
condition may be caused by two types of
non-pressure external leaks.
2006.0 Fiesta 1212006
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206-00-32 Brake System - General Information 206-00-32
GENERAL PROCEDURES
Brake System Bleeding(l2 141 0) /'. ,
All Vehicles Repeat the procedure for the remaining brake
A WARNING:Brake fluid contains polyglycol lines.
ethers and polyglycols. Avoid contact with
General
Equipment
9m ACAUTION:M~~~ sure that the bleed nipple
the eyes. Wash hands thoroughly after
Vehicles with anti-lock brakes handling. If brake fluid contacts the eyes,
flush the eyes for
15 minutes with cold 10. N0TE:This step is only necessary when
running water. Get medical attention
if changing the brake fluid to remove the used
irritation persists.
If taken internally, drink brake
fluid from the hydraulic control unit
water and induce vomiting. Get medical (HCU).
Worldwide
Diagnostic System (WDS)
attention immediately. Failure to follow
Using WDS, bleed the brake system.
these instructions may result in personal'
injury.
CAUTI0N:If brake fluid is spilt on the
paintwork, the affected area must be
immediately washed down with cold water. cap
is installed after bleeding the brake
N0TE:Make sure that the vehicle is standing on a
level surface.
line(s). This will prevent corrosion to the
bleed nipple. Failure to follow this instruction
Bleeding may result in the bleed nipple becoming
seized.
N0TE:The system consists of separate circuits for
each front and diagonally opposite rear wheel.
Each circuit can be bled independently.
ACAUTION:T~~ brake fluid reservoir must
remain full with new, clean brake fluid at all
times during bleeding.
Install the bleed tube to the bleed nipple.
2. Immerse the end of the bleed tube in a bleed
jar containing a small quantity of approved
brake fluid.
3. Position the bleed jar base at least 300 mm
above the bleed nipple to maintain fluid
pressure and prevent air leaking past the
threads of the bleed nipple.
4. Loosen the bleed nipple by one-half turn.
5. Operate the brake pedal fully ipumping brake
fluid and air into the bleed jar) and allow the
brake pedal to return to the rest position.
6. Fill the brake fluid reservoir to the MAX mark.
7. Continue operating the brake pedal until
air-free fluid is being pumped into the bleed
jar.
8. With the brake pedal fully depressed tighten
the bleed nipple.
2006.0 Fiesta IZIZOO~ GI 7458en
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