tire type FORD KUGA 2011 1.G Workshop Manual

Road/Roller Testing
Road or roller testing may be carried out for various
reasons and a procedure detailing pre-test checks,
engine starting and stopping, pre-driving checks,
on-test checks and final checks to be completed
on completion of the test is given below.
Unless complete vehicle performance is being
checked, the full road test procedure need not be
carried out. Instead, those items particularly
relevant to the system(s) being checked can be
extracted.
Pre-Test Checks
WARNING: If the brake system hydraulic
fluid level is low, pedal travel is excessive
or a hydraulic leak is found, do not attempt
to road test the vehicle until the reason for
the low fluid level, excessive pedal travel
or hydraulic leak is found and rectified.
It is suggested that pre-test checks and functional
tests of those systems and circuits which affect the
safe and legal operations of the vehicle, such as
brakes, lights and steering, should always be
carried out before the road or roller test.
With the ignition switched off, check:
– the engine oil level.
– the engine coolant level.
– the tires, for correct pressure, compatible types and tread patterns, and wear within limits.
– that there is sufficient fuel in the tank to complete the test.
– all around the engine, transmission and under the vehicle for oil, coolant, hydraulic and fuel
leaks. Make a note of any apparent leaks and
wipe off the surrounding areas to make it easier
to identify the extent of the leak on completion
of the test.
Starting the Engine
NOTE: On initial drive away from cold and within
the first 1.5 km (1 mile), do not depress the
accelerator pedal beyond half travel until the
vehicle has attained a minimum speed of 25 km/h
(15 miles/h). Never operate at high engine speed
or with the accelerator pedal at full travel whilst the
engine is cold.
With the ignition switched off, check: – that the parking brake is applied.
– that the gear lever is in the neutral position.
– that all instrument gauges (except fuel gauge)
read zero.
With the ignition switched on, check:
– that the ignition controlled warning lamps are illuminated.
– that the engine temperature gauge registers a reading compatible with the engine temperature.
– that the fuel gauge registers a reading appropriate to the fuel level in the tank.
– the operation of the parking brake warning lamp and fluid level warning indicator.
Road or Roller Testing
CAUTION: If road testing, check the brake
operation while still traveling at low speed
before continuing with the test. If the
brakes pull to one side, or appear to be
otherwise faulty, do not continue with the
road test until the fault has been found and
rectified.
During the road or roller test, check:
– that the clutch pedal operation is not stiff or heavy.
– that the initial gear engagement is smooth and there is no evidence of clutch drag.
– that the parking brake control operates smoothly and releases quickly and completely.
– that the clutch takes up the drive smoothly, without slip or judder.
– that gear changing is smooth with no abnormal noises or vibrations from the transmission.
– the engine power output is satisfactory, full power is achieved, acceleration is smooth and
pedal operation is not stiff or heavy, and engine
speed returns to idle correctly.
– there is no excessive or abnormally colored smoke from the engine under normal driving,
heavy load or overrun conditions.
– that steering operation, including power steering (if equipped), is smooth, accurate, not
excessively heavy or with excessive free play
or vibration.
– that the steering does not pull to one side and self centers smoothly after cornering.
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Noise Conditions
• Gear noise is typically a howling or whining dueto gear damage or incorrect bearing preload. It
can occur at various speeds and driving
conditions, or it can be continuous.
• Chuckle is a particular rattling noise that sounds like a stick against the spokes of a spinning
bicycle wheel. It occurs while decelerating from
64 km/h (40 mph) and can usually be heard all
the way to a stop. The frequency varies with
vehicle speed.
• Knock is very similar to chuckle, though it may be louder and occurs on acceleration or
deceleration. The teardown will disclose what
has to be corrected.
Clicking, popping or grinding noises may be caused
by the following:
• worn, damaged or incorrectly installed wheel bearing, suspension or brake component.
Check and rule out tires, exhaust and trim items
before disassembling the transmission to diagnose
and correct gear noise.
The noises described under Road Test usually
have specific causes that can be diagnosed by
observation as the unit is disassembled. The initial
clues are the type of noise heard on the road test
and driving conditions.
Vibration Conditions
Vibration at highway speeds may be caused by
the following:
• out-of-balance front or rear wheels.
• out-of-round tires.
Shudder or vibration during acceleration may be
caused by the following:
• damaged powertrain/drivetrain mounts.
• excessively high constant velocity (CV) joint operating angles caused by incorrect ride height.
Check ride height, verify correct spring rate and
check items under inoperative conditions.
Road Test
A gear-driven unit will produce a certain amount
of noise. Some noise is acceptable and may be
audible at certain speeds or under various driving
conditions, as on a newly paved asphalt road. The slight noise is in no way detrimental and must be
considered normal.
The road test and customer interview (if available)
provide information needed to identify the condition
and give direction to the correct starting point for
diagnosis.
1. Make notes throughout the diagnosis routine.
Make sure to write down even the smallest bit
of information, because it may turn out to be the
most important.
2. Do not touch anything until a road test and a thorough visual inspection of the vehicle have
been carried out. Leave the tire pressures and
vehicle load just where they were when the
condition was first observed. Adjusting tire
pressures, vehicle load or making other
adjustments may reduce the condition(s)
intensity to a point where it cannot be identified
clearly. It may also inject something new into
the system, preventing correct diagnosis.
3. Make a visual inspection as part of the preliminary diagnosis routine, writing down
anything that does not look right. Note tire
pressures, but do not adjust them yet. Note
leaking fluids, loose nuts and bolts, or bright
spots where components may be rubbing
against each other. Check the load space for
unusual loads.
4. Road test the vehicle and define the condition by reproducing it several times during the road
test.
5. Carry out the Road Test Quick Checks as soon as the condition is reproduced. This will identify
the correct diagnostic procedure. Carry out the
Road Test Quick Checks more than once to
verify they are providing a valid result.
Remember, the Road Test Quick Checks may
not tell where the concern is, but they will tell
where it is not.
Road Test Quick Checks
1. 24-80 km/h (15-50 mph): with light acceleration,a moaning noise is heard and possibly a
vibration felt in the front floor panel. It is usually
worse at a particular engine speed and at a
particular throttle setting during acceleration at
that speed. It may also produce a moaning
sound, depending on what component is
causing it. REFER to Tip-in Moan in the
Driveline Noise and Vibration Symptom Chart.
2. Acceleration/Deceleration: With slow acceleration and deceleration, a shake is
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sometimes noticed in the steering wheel/column,
seats, front floor panel, front door trim panel or
front end sheet metal. It is a low frequency
vibration (around 9-15 cycles per second). It
may or may not be increased by applying the
brakes lightly. REFER to Idle
Boom/Shake/Vibration in the Driveline Noise
and Vibration Symptom Chart.
3. High Speed: A vibration is felt in the front floor panel or seats with no visible shake, but with
an accompanying sound or rumble, buzz, hum,
drone or booming noise. Coast with the clutch
pedal depressed (manual transmission) or shift
control selector lever in "N" (NEUTRAL)
(automatic transmission) and engine idling. If
vibration is still evident, it may be related to
wheels, tires, front brake discs, wheel hubs or
front wheel bearings. REFER to Shake and
Vibration While Driving in the Driveline Noise
and Vibration Symptom Chart.
4. Engine rpm Sensitive: A vibration is felt whenever the engine reaches a particular rpm.
It will disappear in neutral coasts. The vibration
can be duplicated by operating the engine at
the problem rpm while the vehicle is stationary.
It can be caused by any component, from the
accessory drive belt to the clutch or torque
converter which turns at engine speed when the
vehicle is stopped. REFER to Shake and
Vibration While Driving in the Driveline Noise
and Vibration Symptom Chart.
5. Noise and Vibration While Turning: Clicking, popping or grinding noises may be due to the
following:
• worn, damaged or incorrectly installed front wheel bearing.
• damaged powertrain/drivetrain mounts.
Road Conditions
An experienced technician will always establish a
route that will be used for all NVH diagnosis road
tests. The road selected should be reasonably
smooth, level and free of undulations (unless a
particular condition needs to be identified). A
smooth asphalt road that allows driving over a
range of speeds is best. Gravel or bumpy roads
are unsuitable because of the additional road noise
produced. Once the route is established and consistently used, the road noise variable is
eliminated from the test results.
NOTE:
Some concerns may be apparent only on
smooth asphalt roads.
If a customer complains of a noise or vibration on
a particular road and only on a particular road, the
source of the concern may be the road surface. If
possible, try to test the vehicle on the same type
of road.
Vehicle Preparation
Carry out a thorough visual inspection of the
vehicle before carrying out the road test. Note
anything which is unusual. Do not repair or adjust
any condition until the road test is carried out,
unless the vehicle is inoperative or the condition
could pose a hazard to the technician. After
verifying that the condition has been corrected,
make sure all components removed have been
installed.
Power Steering Conditions
Check for the noise in the following conditions to
verify the customer concern.
• Check for the noise in several temperature conditions.
• Is the noise from when the vehicle was new?
• Can the noise be repeated constantly or is it random?
• Check the condition of the vehicle age, mileage and service record.
• Interview the customer to find the operating condition in which the noise will occur. Test the
vehicle based on the detail(s) from the customer
interview.
• Follow the power steering operation noise condition tables below, to find which condition
the noise will occur.
Power Steering Operation Noise Check
Step 1: Check for NVH concerns from non-steering
components, which may sound like noises coming
from the steering system.
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Component Description
DC/AC converter
The converter operates with a series connection
of two power converter circuits. The primary power
converter here is a push-pull converter. It converts
the 12 V supply from the electrical system of the
vehicle to an intermediate direct current link of
approx. 320 V.
From this intermediate direct current link, the
downstream full H-bridge circuit generates a
pulse-width modulated output voltage with 230
V/50 Hz.
A controller modulates the pulse width of the
square-wave output voltage and maintains an
effective output voltage of 230 V under varying
load conditions and under different input voltages.
Here, the rising and falling edge of the positive and
negative square wave pulse are controlled
symmetrically to the ideal shape of a sine wave,
which - among other things - also makes a positive
contribution to electromagnetic compatibility.
DC/AC converters which supply a modified square
wave output voltage are referred to as 'Modified
Sine Wave Inverters".
With this type of system there is no need for a
residual current operated device for protection in
the event of accidental contact, as all of the 230 V
lines are double-insulated. Potential-free separation
of the entire 230 V voltage part from the vehicle is
provided (electrical isolation).
The output voltage of 230 V/50 Hz is not generated
until the switching voltage is present at terminal 1
of the converter via the AC mains outlet switch.
The converter operates with the ignition switched
on and a vehicle electrical supply of between 11
V and 16 V. Internal voltage monitoring in the converter deactivates the system if the input
voltage is outside this range.
AC mains outlet
Description
Item
230 V/50 Hz outlet
1
LED (light emitting diode)
2
Cover3 Description
Item
230 V/50 Hz outlet (for UK vehicles)
1
LED2
Cover3
In order to prevent accidents and the risk of
electrical shock, the outlet is protected with a child
safety device and the AC outlet switch.
In order to make the system safer for children, the
safety catches for the 230 V contacts can only be
pushed to one side by pressing a Euro plug evenly
into both of the connector openings.
The AC mains outlet switch only activates the
system when a consumer is connected to the
outlet. G1055639en
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Wheels and Tires
Inspection and Verification
Visual Inspection Chart
MechanicalWheel(s)Tire(s)
Tire pressure(s) * Wheel nuts
Wheel studs
* Vehicles equipped with a tire deflation detection system (DDS) must be inspected for correct operation using the Ford approved diagnostic tool.
To maximize tire performance, inspect the tires for
signs of incorrect inflation and uneven wear which
may indicate a need for balancing, rotation or
suspension alignment. Tires should also be
checked frequently for cuts, stone bruises,
abrasions, blisters and for objects that may have
become embedded in the tread. More frequent
inspections are recommended when rapid or
extreme temperature changes occur or when road
surfaces are rough or occasionally littered with
foreign material.
As a further visible check of tire condition, tread
wear indicators are molded into the bottom of the
tread grooves. When these indicator bands become
visible, new tires must be installed.
Tire Wear Diagnosis
Uneven wear is usually caused by either excessive
camber or excessive toe on tires.
Sometimes incorrect toe settings or worn struts will
cause severe `cupping' or `scalloped' tire wear on
non-driven wheels.
Severely incorrect toe settings will also cause other
unusual wear patterns.
Tire Vibration Diagnosis
A tire vibration diagnostic procedure always begins
with a road test. The road test and customer
interview (if available) will provide much of the
information needed to find the source of a vibration. During the road test, drive the vehicle on a road
that is smooth and free of undulations. If vibration
is apparent, note and record the following:
– the speed at which the vibration occurs.
– what type of vibration occurs in each speed
range.
– mechanical or audible
– how the vibration is affected by changes in the following:
– engine torque
– vehicle speed
– engine speed
– type of vibration - sensitivity: – torque sensitive
– vehicle speed sensitive
– engine speed sensitive
The following explanations help isolate the source
of the vibration.
Torque Sensitive
This means that the condition can be improved or
made worse by accelerating, decelerating,
coasting, maintaining a steady vehicle speed or
applying engine torque.
Vehicle Speed Sensitive
This means that the vibration always occurs at the
same vehicle speed and is not affected by engine
torque, engine speed or the transmission gear
selected.
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Front Drive Halfshafts
Inspection and Verification
NOTE:New front wheel drive halfshafts should not
be installed unless disassembly and inspection
reveals unusual wear.
1. Inspect front wheel driveshaft joint boots for evidence of cracks, tears or splits.
NOTE: While inspecting the front wheel driveshaft
CV joint boots, watch for indentations (dimples) in
the boot convolutions. If an indentation is observed,
it must be removed.
2. Inspect the underbody for any indication of grease splatter in the vicinity of the front wheel
driveshaft CV joint boots outboard and inboard
locations, which is an indication of front wheel
driveshaft CV joint boot and/or front wheel
driveshaft CV joint boot clamp damage. 3. Inspect for inboard CV joint stub shaft pilot
bearing housing seal leakage at the front wheel
driveshaft CV joint.
4. Make sure front axle wheel hub retainer is the correct prevailing torque type.
5. The silicone front wheel driveshaft CV joint boot will sweat during operation, causing a light film
of grease to show on the outside of the front
wheel driveshaft CV joint boot. This condition
is normal.
NOTE: Halfshafts are not balanced and do not
contribute to rotational vibration.
6. If the concerns remain after the inspection, determine the symptoms and go to the Symptom
Chart. For additional Noise, Vibration and
Harshness (NVH). REFER to Section 100-04
[Noise, Vibration and Harshness] .
Symptom Chart
Action
Possible Sources
Symptom
• INSPECT, CLEAN andLUBRICATE as necessary.
• Inadequate or contaminated
lube in outboard/inboard front
wheel driveshaft CV joint.
• Clicking, Popping or Grinding
Noises While Turning
• INSPECT and REPAIR asnecessary.
• Another component contacting
driveshaft assembly.
• INSPECT and REPAIR asnecessary. REFER to
Section 204-00 [Suspension
System - General Information]
/ 206-00 [Brake System -
General Information] /211-00
[Steering System - General
Information] .
• Wheel bearings, brakes,
suspension or steering
components.
• REPAIR or INSTALL new asnecessary. REFER to
Section 204-04 [Wheels and
Tires] .
• Out of balance front wheels or
tires.
• Vibration at Highway Speeds
• REPAIR or INSTALL new asnecessary. REFER to
Section 204-04 [Wheels and
Tires] .
• Out-of-round tires.
• REPAIR or INSTALL new asnecessary.
REFER to Halfshaft Disas-
semblv and Assembly in this
section.
• Incorrectly seated outboard
front wheel driveshaft CV joint
in front wheel hub.
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Brake System
General EquipmentPressure/vacuum gauge set
The Ford approved diagnostic tool
The brake system operates by transferring effort
applied to the brake pedal by the driver to the
brakes at each wheel.
The braking effort is distributed to each wheel,
using a hydraulic system. The system is assisted
using a vacuum brake booster that reduces pedal
effort and increases hydraulic pressure.
The parking brake operates on the rear wheels
and is applied using a hand operated control.
Inspection and Verification
NOTE: Before carrying out any diagnosis, make
sure that the brake system warning indicator is
functional.
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical or electrical damage.
Visual Inspection Chart
Electrical
Mechanical
• Electricalconnector(s)
• Wiring harness(s)
• Switch(es)
• Tire pressure(s)
• Wheels and tires
• Fluid leak(s)
3. If an obvious cause for an observed or reported concern is found, correct the case (if possible)
before proceeding to the next step.
4. If the cause if not visually evident, verify the symptom and refer to the Symptom Chart.
Road Test
Carry out a road test to compare actual vehicle
braking performance with the performance
standards expected by the driver. The ability of the
test driver to make valid comparisons and detect
performance deficiencies will depend on
experience.
The driver should have a thorough knowledge of
the brake system operation and accepted general performance guidelines to make good comparisons
and detect performance concerns.
An experienced technician will always establish a
route that will be used for all brake diagnosis road
tests. The road selected will be reasonably smooth
and level. Gravel or bumpy roads are not suitable
because the surface does not allow the tires to grip
the road equally. Crowned roads should be avoided
because of the large amount of weight shifted to
the low set of wheels on this type of road. Once
the route is established and consistently used, the
road surface variable can be eliminated from the
test results.
Before a road test, get a complete description of
the customer concerns or suspected condition.
From the description, the technician will be able to
match possible causes with symptoms. Certain
components will be identified as possible sources
while others will be eliminated by the evidence.
More importantly, the customer description can
reveal unsafe conditions which should be checked
or corrected before a road test. The description will
also help form the basic approach to the road test
by narrowing the concern to specific components,
vehicle speed or conditions.
Begin the road test with a general brake
performance check. Using the description of the
concern, test the brakes at different vehicle speeds
using both light and heavy pedal pressure.
Determine if the concern is in the front or rear
braking system. First use the foot brake and then
the parking brake. If the condition (i.e. pull,
vibration, pulsation) occurs only on operation of
the parking brake, the concern is in the rear brake
system. If the condition occurs when the foot brake
is depressed, the concern is in the front brake
system.
Avoid locking the brakes and sliding the tires. This
condition will not indicate brake efficiency. A heavily
braked but turning wheel will stop the vehicle in a
shorter distance than locked wheels.
If the concern becomes evident during this check,
make sure it fits the description given before the
road test. If the concern is not evident, attempt to
duplicate the condition using the information from
the description.
If a concern exists, use the Brake System Symptom
Chart in order to isolate it to a specific sub-system
and condition description. From this description, a
list of possible sources can be used to further
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