2007 FORD FIESTA ESP

I 00-00-21 General Information 1 00-00-21
DESCRIPTION AND OPERATION
Always disconnect the jumper cables in the reverse
order to the connecting sequence and do not short
i the ends of the cables.
Do not rely on the generator to restore a
discharged battery. For a generator to recharge a
battery, it would take in excess of eight hours
continuous driving with no additional loads placed
on the battery.
Component Cleaning
To prevent the ingress of dirt, accumulations of
loose dirt and greasy deposits should be removed
before disconnecting or dismantling components
or assemblies.
Components should be thoroughly cleaned before inspection prior to reassembly.
Cleaning Methods:
- Dry cleaning.
- Removal of loose dirt with soft or cable brushes.
- Scraping dirt off with a piece of metal or wood.
( ,- Wiping off with a rag.
A WARN1NG:Wear eye protection when
cleaning vehicle components with
compressed air, a steam cleaner or a
power washer. Failure to follow this
instruction may result in personal injury.
CAUTIONS:
A Compressed air is sometimes 'wet' so use
with caution, especially on hydraulic
systems.
A To prevent damage to the electrical
connectors in the engine compartment, do
not use a steam cleaner or a power washer
to clean the engine compartment.
- Blowing dirt off with compressed air.
- Removal of dry dust using vacuum equipment.
This method must always be used to remove
friction lining material dust (asbestos particles).
- Steam cleaning.
A WARN1NG:Most solvents require careful
handling and some are harmful. Refer to
Health and Safety Precautions and to the
manufacturers literature for the relevant
safety precautions. Failure to follow these
instructions may result in personal injury.
Various solvents are available which are suitable
for component cleaning. Some components, such
as brake hydraulic parts and electrical assemblies
should be cleaned only with recommended solvents
- refer to Solvents, Sealers and Adhesives or to
the section of the manual relevant to the
component.
Calibration of Essential Measuring
Equipment
A WARNING:Equipment, which requires
regular calibration, must be calibrated in
accordance with the manufacturers
instructions. Failure to follow this
instruction may result in personal injury
or damage to components.
It is of fundamental importance that certain
essential equipment, for example torque wrenches,
multimeters, exhaust gas analyzers or rolling roads,
are regularly calibrated in accordance with the
manufacturers instructions.
2006.0 Fiesta 1212006 GI 7373en
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100-04-2 Noise, Vibration and Harshness 100-04-2
DESCRIPTION AND OPERATION
Noise, Vibration and Harshness (NVH)
Noise, vibration and harshness (NVH) is becoming
more important as vehicles become more '
Know the History of the Condition
sophisticated and passenger comfort levels
increase. This section is designed to aid in the
- Did it start suddenly or appear gradually?
diagnosis and testing and repair of NVH concerns.
- Was it related to some other occurrence such
- Noise is defined as sounds not associated with
as a collision or previous part replacement?
the operation of passenger compartment
- Know how the condition made itself known; it
equipment that interface with customer
may be an important clue to the cause.
satisfaction.
- Vibration is defined as impulses felt by the
customer that are not caused by road surface Know the Probability of Certain
changes. Conditions Develop~ng
- Harshness is a ride quality issue where the - Look for the simple rather than the complex.
customer feels that the vehicle response to the
road surface is sharply transmitted to the
- For example:
customer.
- Electrical conditions usually occur at
connections rather than components.
Diagnostic Theory - An engine no-start is more likely to be caused
by a loose wire or small adjustment rather
than a sheared-off
camshafi. Diagnosis is more than just following a series of
interrelated steps in order to find the solution to the - Know the difference between impossible and
specific condition. It is a way of looking at systems improbable. Certain failures
in a system can be
that are not functioning the way they should and improbable
but still happen.
finding out why. Also it is knowing how the system
- New parts are just that, new. It does not mean
should work and whether it is working correctly. they are always
good functioning parts.
There are basic rules for diagnosis. If these rules
are followed, the cause of the condition is usually
Do Not Cure the Symptom and Leave
found the first time through the system. the Cause
Know the System
- Know how the parts go together. Lowering
the pressure in a front tire may correct
the condition of a vehicle leaning to one side, but
it does not correct the original condition.
- Know how the system operates as well as its
limits and what happens when the system goes
Be Positive the Cause is Found
wrong.
- Sometimes this means checking the system - Double check findings.
against one that is known to be working
- What caused a worn component?
correctly.
- A loose transmission or engine mount could
indicate that other mounts are also loose.
Know the History of the System
Diagnostic Charts
A clue in any one of these areas may save time:
- How old or new is the system? Charts are a simple
way of expressing the
relationship between basic logic and a physical
- What kind of treatment has it had?
system of components. They help discover the ,.
- Has it been serviced in the past in such a
cause of a condition in the least time. Diagnostic (,-
manner that might relate to the present
charts combine many areas of diagnosis into one
condition? visual display:
- What is the service history?
2006.0 Fiesta 12/2006 G28448en
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100-04-4 Noise, Vibration and Harshness 100-0414
DIAGNOSIS AND TESTING
Noise, Vibration and Harshness (NVH)
Inspection and Verification
1. Verify the customer concern. Identify the Condition
2. Visually inspect for obvious signs of mechanical NVH usually occur in four areas:
or electrical damage.
tires
3. If an obvious cause for an observed or reported
concern is found, correct the cause (if possible) engine accessories
before proceeding to the next step.
suspension
4. If the concern is not visually evident, verify the
symptom and REFER to the Symptom Chart.
How to Use this Diagnostic Procedure
Section
Noise, vibration and harshness (NVH) concerns
have become more important as
vehjcles have
become more sensitive to these vibrations. This
section is designed to aid in identifying these
concerns.
The section provides diagnostic procedures based on symptom. If the condition occurs at
high speed, for instance, the most likely place
to start is under Shake and Vibration While
Driving.
The road test procedure will tell how to sort the
conditions into categories and how to tell a
vibration from a shake.
A series of Road Test Quick Checks are
provided to make sure that a cause is either
pinpointed or eliminated.
Name the condition, proceed to the appropriate
section and locate the correct diagnosis. When
the condition is identified, the job is partly done.
Follow the diagnostic procedure as outlined.
Quick Checks are described within the step,
while more involved tests and adjustments are
outlined in General Procedures.
Always follow each step exactly and make notes
to recall important findings later.
driveline
It is important, therefore, that an NVH concern be
isolated into its specific
area(s) as soon as
possible. The easiest and quickest way to do this
is to carry out the Road Test as outlined. To assist
in the diagnosis and testing
procedure(s), use a
suitable approved NVH diagnosis tester.
Noise Diagnostic Procedure
Non-Axle Noise
The five most common sources of non-axle noise
are exhaust, tires, roof racks, trim panels and
( transmission.
Therefore, make sure that none of the following
conditions are the cause of the noise before
proceeding with a driveline
teardown and
diagnosis.
In certain conditions, the pitch of the exhaust
may sound very much like gear noise. At other
times, it can be mistaken for a wheel bearing
rumble.
Tires, especially snow tires, can have a high
pitched tread whine or roar, similar to gear
noise. Radial tires may have this characteristic.
Also, any non-standard tire with an unusual
tread construction may emit a roar or whine
noise.
Trim panels can also cause whistling or whining
noise.
Clunk may be a metallic noise heard when the
Customer Interview automatic transaxle is engaged in "R
(REVERSE) or "D" (DRIVE) or it may occur
The road test and customer interview (if available) when
the throttle is applied or released. It is
provide information that will help identify the caused
by backlash somewhere in the driveline.
,
concern and will provide direction to the correct Bearing rumble sounds like marbles being
starting point for diagnosis. (
tumbled. This condition is usually caused by a
damaged wheel bearing.
2006.0 Fiesta 1212006 G37349en
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206-00-2 Brake System - General Information 206-00-2
DESCRIPTION AND OPERATION
Brake System
Overview
A Brake system without Anti-lock
Brake
I I system (ABS)
I B I Brake system with ABS I
I 1 I Brake master cylinder I -
1 2 1 Reservoir I
1 4 1 Brake pedal I
1 5 1 Brake pressure reduction valve I
1 6 1 Rear drum brake I
171t disk brake I
8 ABS hydraulic unit with integrated control
1 1 unit
1 9 I Wheel speed sensors I
Vehicles without ABS are equipped with brake
pressure reduction valves for the rear wheel
brakes. They are located in the corresponding
brake circuits at the brake master cylinder.
Vehicles with ABS do not need brake pressure
reduction valves because they are equipped with
electronic brake distribution (EBD).
The handbrake is cable operated on the rear
brakes.
On vehicles with a petrol engine the necessary
vacuum for the brake booster is generated by the
intake manifold.
On vehicles with a diesel engine, a vacuum pump
driven by the engine provides the necessary
vacuum for the brake booster.
2006.0 Fiesta lu2006 G281357en
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206-0214 Drum Brake 206-02-4
DESCRIPTION AND OPERATION
The heat generated during braking is passed to
the bi-metallic strip. If the heat exceeds a critical
point, the bi-metallic strip bends upwards into the
corresponding nib and prevents further adjustment.
After the brake has cooled again, the bi-metallic
strip returns to the initial position. Adjustment is
now possible again.
2006.0 Fiesta 1212006 G250944en
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206-03-3 Front Disc Brake 206-03-3
DESCRIPTION AND OPERATION
Front Disc Brake
Overview
Item Description
i
The front brake system has internally ventilated
brake discs and a single-piston floating caliper.
3
4
5
The front disc brakes are the same on all vehicles,
irrespective of the vehicle specifications.
1
2
Retaining spring clip
Brake pads
Brake caliper
Please refer to the "General Specifications" section
for the dimensions of the brake discs.
Brakedisc
Brake back plate assembly
The piston of the brake caliper has a diameter of
54 mm.
2006.0 Fiesta 1212006 G250945en
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206-0713 Power Brake Actuation 206-0713
DESCRIPTION AND OPERATION
Brake Booster
Emergency brake assistant (EBA) EBA operates purely mechanically, and is
completely integral with the brakeservo.
As ABS braking systems have become widespread,
it has emerged that because of incorrect use of the
Brake servo units with and without EBA are
brakes, many drivers are losing the safety benefit externally identical. For identification purposes,
which ABS
~rovides. brake servo units with EBA carry a white sticker I showing a large letter "A. Drivers are applying the brakes too timidly.
Because of this, the Anti-lock Braking System The tandem master cylinder
is the same for
(ABS) does not engage, and the maximum braking
vehicles with or without
effect is not achieved.
The EBA recognises from the driver's manner of
braking that an emergency situation is occurring,
and automatically applies full braking power.
This occurs in a matter of milliseconds, which is
faster than the driver could do it.
Furthermore, it was observed that after the first
heavy application of the brake pedal, the driver
releases the pressure on the pedal too early.
The EBA ensures that the ABS effect still continues
when the pedal pressure would normally lie below
the ABS range of control. The system is available
j as an option depending on market and vehicle
variant.
Function
In normal braking situations, the brake servo with
EBA operates in the same way as a conventional
brake servo unit. This means that the driver can
always modulate the brakes.
If an activation threshold defined by a characteristic
curve is exceeded during braking, the EBA
operates.
Determination of the activation threshold is based
on the pedal movement parameters, which are a
function of the pressure on the brake pedal and
the speed of movement of the pedal.
Depending on driving manner, EBA results in a The characteristic curve
is separately defined for
reduction in braking distance of 15% for each vehicle model.
experienced drivers, to over
40% for average The mechanical EBA uses the fact that in a brake
drivers. servo unit, the valve piston moves ahead of the
Because EBA decelerates the vehicle up to the control housing
when a braking operation starts.
wheel locking limit, emergency brake assist is only Because of this, there is a relative travel distance used in vehicles with ABS.
between the control housing and the valve piston
which can vary depending on the force applied to
Components the brake pedal and the pedal speed.
The relative travel distance is small when the pedal
moves slowly with low force applied to it. The
relative travel distance is larger when the pedal
moves faster with higher force applied to it.
Item Description
-
2006.0 Fiesta 1212006 GI 63289en
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206-09A-3 Anti-Lock Control 206-09A-3
DESCRIPTION AND OPERATION
Anti-Lock Control
Overview
Function
The ABS is a closed loop control system in the
brake system which prevents the wheels from
1 4 1 Ignition lock I situations.
3
1 5 1 Stoplamp switch I
6 ABS warning lamp in the instrument
I 1 cluster
Wheel
speed sensors
In addition to the conventional brake system with
two diagonally split brake circuits, the ABS consists
of an ABS hydraulic unit with integrated control
unit, four wheel sensors and the ABS warning lamp
in the instrument cluster. locking up under
braking and therefore maintains
steerability and driving stability in extreme
Electronic brake force distribution is integrated in
the software of the ABS control unit', which
electronically regulates and optimises the pressure
applied to the wheel brakes on the front and rear
axles in accordance with the operating conditions.
ABS control unit
The ABS control unit continuously compares stored
physical deceleration values with those detected
by the wheel sensors. This allows the lock-up
tendency of each wheel to be detected separately.
If the ABS control unit detects that a wheel is
threatening to lock up, then the corresponding
hydraulic valves in the valve block are either closed
or opened.
The ABS control unit then also passes on the
vehicle speed signal obtained from the wheel sensors to the Powertrain Control Module (PCM).
2006.0 Fiesta 1212oo6 GI 63290en
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