Electrical FORD FIESTA 2007 User Guide

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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204-02-20 Rear Suspension 204-02-20
REMOVAL AND INSTALLATION
Trailing Arm Bushing(l5 730 0) ,
I
Remover/lnstaller, Rear Axle
Housing Bushings
Remover/lnstaller, Pivot
Bushing
205-297 (1 5-086)
15064
-- -
I Remover/lnstaller, Pivot
Adapter for
205-074
205-074-0 1 (1 5-064)
15110
Special Tool(s) ,
Bushing
205-342 (1 5-1 1 0)
151 1002
General Eaui~ment
Adapter for 205-342
205-342-02 (1 5-1 10-02)
I Transmission jack I
Removal
I. Raise and support the vehicle.
For additional information, refer to: Jacking
(100-02 Jacking and Lifting, Description
and Operation)
I Lifting (100-02 Jacking and Lifting,
Description and Operation).
2. Disconnect the wheel speed sensor electrical
connector.
f
3. Detach the parking brake cable from the
beam axle on both sides.
2006.0 Fiesta 1212006 G289770en
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204-02-22 Rear Suspension 204-02-22
REMOVAL AND INSTALLATION
3. N0TE:Final tightening of the trailing arm 6. Install the beam axle retaining bolts on both
bushing retaining nut and bolt must be
sides.
carried out at the installation setting.
N0TE:The spacer must be positioned exactly as
illustrated.
Using the fabricated spacer, set the beam
axle bracket to the installation setting.
4. N0TE:Final tightening of the trailing arm
bushing retaining nut and bolt must be
carried out at the installation setting.
Install the trailing arm bushing retaining nut
and bolt.
Remove the spacer.
5. Raise the beam axle.
7. Lower and remove the transmission jack.
8. Attach the parking brake cable to the beam
axle on both sides.
9. Connect the wheel speed sensor electrical
connector.
10. Lower the vehicle.
(
2006.0 Fiesta 1212006 G289770en a
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205-0414 Front Drive Halfshafts 205-04-4
DIAGNOSIS AND TESTING
Front Drive Halfshafts
Inspection and Verification 3. If an obvious cause for an observed or reported
concern is found, correct the cause (if possible) c.# '
1. Verify the customer concern. before proceeding
to the next step.
2. Visually inspect for obvious signs of mechanical
or electrical damage.
Symptom Chart - Front Drive Halfshafts
Symptom Chart
Symptom
Possible Sources Action
Clicking, Popping or Grinding
Noises While Turning Inadequate or contaminated INSPECT, CLEAN and
I lubricant in the inner or outer I LUBRICATE as necessary.
I Outer Constant Velocity (CV)
I Joint Boot - in this section.
front drive halfshaft constant
velocity (CV) joint.
REFER to Constant
Velocity (CV) Joint Boot -
Wheel bearings, brakes,
suspension or steering
components.
Another component contacting
front drive halfshaft assembly.
--
INSPECT and REPAIR as
necessary. REFER to
Section 204-00 [Suspension
System
- General Information]
1 206-00 [Brake System -
General Information] I 21 1-00
[Steering System
- General
Information].
INSPECT and REPAIR as
necessary.
- --
Vibration at Highway Speeds
Shudder Vibration During
Acceleration. Out of balance front wheels or
tires. Balance wheels and tires as
necessary.
I Incorrectly seated outer I REPAIR or INSTALL new as I
Out-of-round tires.
constant velocity (CV) joint in necessary.
front wheel hub.
I REFER to Halfshaft LH -
REPAIR or INSTALL new as
necessary.
I I I Halfshaft RH - in this section. I
Excessively high CV joint
operating angles caused by
incorrect ride height. CHECK the ride height,
VERIFY correct spring rate.
CHECK items under Halfshaft
Joint Pullout. REPAIR or INSTALL
new as necessary.
Excessively worn or damaged
I inner or outer front drive half-
- - - - --
2006.0 Fiesta 1212006 G25403en
INSPECT and INSTALL new
as necessary.
shaft constant velocity (CV)
joint. REFER
to Halfshaft LH
-
I Halfshaft RH - in this sectionk 1;
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206-05-5 Parking Brake and Actuation 206-05-5
DIAGNOSIS AND TESTING
Parking Brake
lnspection and Verification
1. Verify the customer concern by operating the
parking brake system.
2. Visually inspect for obvious signs of mechanical
or electrical damage.
i Symptom Chart
Visual lnspection Chart
I Mechanical I Electrical I
- Parking brake control
REFER to: Parking
Brake Control
(206-05, Removal
and Installation).
- Cable and conduit
REFER to: Parking
Brake Cable (206-
05, Removal and
Installation).
- Parking brake
warning circuit.
REFER to: Instru-
ment Cluster
(41 3-
01, Diagnosis and
Testing).
3. If an obvious cause for an observed or reported
concern is found, correct the cause (if possible)
before proceeding to the next step.
4. If the concern is not visually evident, verify the
symptom and refer to the Symptom Chart.
Symptom Chart
Svm~tom Possible Sources Action
The parking brake will not apply
Pinpoint Tests
Parking brake control. I . GO to Pinpoint Test A.
Cable and conduit.
The parking brake will not
release
PINPOINT TEST A : THE PARKING BRAKE WILL NOT APPLY
TEST CONDITIONS
DETAILSIRESU LTSIACTIONS
Parking brake control. 1. GO to Pinpoint Test B.
Cable and conduit.
Al: CHECK FOR MISADJUSTED REAR PARKING BRAKE CABLE
Operate the parking brake control several times
to adjust the cable.
Does the parking brake now engage correctly?
+ Yes
Vehicle OK
+ No
GO to A2.
2006.0 Fiesta 1212006 GI 7495en
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206-05-1 7 Parking Brake and Actuation 206-05-1 7
REMOVAL AND INSTALLATION
Parking Brake Control(l2 664 0)
Removal 5. Remove the parking brake control.
I. Remove the parking brake control trim panel.
Installation
2. Disconnect the parking brake warning I. To install, reverse the removal procedure.
indicator switch electrical connector.
2. Adjust the parking brake.
For additional information, refer to Parking
Brake Cable Adjustment in this section.
3. Disconnect the parking brake cable from the
parking brake control.
Discard the retaining clip.
I
4. Release the parking brake.
2006.0 Fiesta 1212006 Gl49893en
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206-0619 Hydraulic Brake Actuation 206-0619
REMOVAL AND INSTALLATION
Disconnect the brake tubes from the brake 11. Disconnect the low brake fluid warning
master cylinder. indicator switch electrical connector.
I
All vehicles
9m &AUTION:C~~ the clutch master cylinder
feed hose to prevent fluid loss or dirt
ingress.
Disconnect the clutch master cylinder feed
hose from the brake fluid reservoir.
12. Remove the brake master cylinder and
brake fluid reservoir assembly.
Installation
A CAUTI0N:Make sure the brake master
cylinder vacuum seal is correctly
positioned before installation.
I. To install, reverse the removal procedure.
2. Bleed the brake system. For additional
information, refer to Section
206-00 [Brake
System
- General Information].
10. Detach the brake master cylinder from the
brake booster.
2006.0 Fiesta 1212006 G89191 en
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206-09A-4 Anti-Lock Control 206-09A-4
DESCRIPTION AND OPERATION
The warning lamp in the instrument cluster is
actuated by the ABS control unit after switching on
the ignition. It remains on up to the end of the ABS
self-test, and is also actuated in the event of
system errors.
It continuously monitors the system for possible
faults and stores these as and when they occur.
The corresponding trouble codes can be
interrogated with the aid of WDS via the DLC
.
The ABS control unit is directly connected via a
diagnostic data link to the DLC.
Valve block
The valve block contains four inlet valves and four
outlet valves. There is one inlet valve and one
outlet valve for each wheel.
When there is no electrical supply the inlet valves
are open and the outlet valves are closed.
The valve block also contains the low-pressure
reservoir and sound damping chambers.
Pump motor
In the event of an ABS intervention the pump motor
ensures that the pressure can be provided to the
regulating channels independently of the brake
master cylinder.
ABS regulating cycle
An ABS regulating cycle has three phases:
Phase
1 - holding pressure
The inlet valve is closed, and the brake pressure
to the wheel brake cannot be increased any
further, even if the actuation pressure (brake
pedal) is increased further.
Phase
2 - pressure reduction
The outlet valve is temporarily opened, and the
brake pressure to the wheel brake is reduced
in a controlled manner.
Phase
3 - pressure build-up
The inlet valve is opened in stages, and the
brake pressure is increased in a controlled
manner to achieve the greatest possible
deceleration.
2006.0 Fiesta 1212006 GI 63290en
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206-0949-5 Anti-Lock Control 206-09A-5 -- -
DESCRIPTION AND OPERATION
Anti-Lock Control
MK70 Anti-lock Brake System (ABS)
The MK70 ABS is similar to the MK60 in
construction and design. The main differences are:
New ABS control unit
New hydraulic lines through a revised valve
block
New wiring harness and electrical connector
(fewer occupied pins)
The MK70 ABS system will be installed from
0512004 in vehicles which only have one ABS
function.
Vehicles with
ESPlBrake Traction Control System
(BTCS) will continue to be equipped with the
MK60.
MK60 ABS
Item Description
Fpump motor I
1 2 I Valve block I
1 3 1 ABS control unit I
The MK60 ABS has been designed specifically for
small to medium size vehicles. Compared to the
MK20 ABS system, it has been possible to reduce
the size of the hydraulic and electric components
(e.g. hydraulic valves and solenoids) and the
housing.
As a result, the overall weight of the ABS hydraulic
unit has been significantly reduced.
The hydraulic unit consists of the pump motor, the
valve block with
8 hydraulic valves and the
electronic control unit.
The ABS control unit actuates the ABS warning lamp in the instrument cluster via the CAN
databus.
The MK60 ABS is a 413 system. This means that
the wheel speed is measured individually for each
wheel (4 wheel speed sensors).
ABS controlled braking is provided individually for the front wheels and jointly for the two rear wheels
(3 control channels; select-low control), i.e. the
ABS control for the rear wheels is governed by the
wheel closest to locking up.
- --
2006.0 Fiesta 1212006 GI 63291 en
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