Jaguar X-Type Sedan and Estate (Wagon). Service manual — part 47

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

Mechanical

Bulges (blister)
Ply separation
Embedded objects
Impact damage
Incorrect speed rating
Incorrect load rating
Incorrect rotational direction

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next

step.

3.

4. If the concern is not visually evident, verify the symptom and refer to Symptom Chart.

4.

Tire Wear Inspection

To maximize tire performance, inspect the tires for signs of incorrect inflation and uneven wear which may indicate a need for balancing,
rotation or front 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 debris.

Tire Wear Diagnosis

New tires should be installed if the wear indicators are exposed or if there is severe shoulder wear. Shoulder wear is usually caused by
either excessive camber or excessive toe on radial tires.

Sometimes incorrect rear toe settings or damaged struts will cause severe cupping' or scalloped' tire wear on non-drive wheels.

Incorrect rear toe alignment will also cause other unusual wear patterns.

Road Test

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 or engine speed sensitive.

The following explanations help isolate the source of the vibration.

Torque Sensitive

This means that the condition may 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.

Engine Speed Sensitive

This means that the vibration occurs at varying vehicle speeds when a different transmission gear is selected. It may sometimes be isolated
by increasing or decreasing engine speed with the transmission in NEUTRAL or by stall testing with the transmission in gear. If the
condition is engine speed sensitive, the cause is probably not related to the tires.

If the road test indicates that there is tire whine, but no shake or vibration, the noise originates with the contact between the tire and the
road surface.

A thumping noise usually means that the tire has a flat or soft spot making a noise as they slap the roadway. Tire whine may be
distinguished from axle noise. Tire whine remains the same over a range of speeds.

Symptom Chart

Symptom

Possible Sources

Action

Tires show excess wear on edge
of treads

Tires under-inflated

Correct pressure to specification.

Vehicle overloaded

Correct as required.

Tires show excess wear on edge
of treads (having the correct tire
pressures).

Incorrect toe setting

Set to specification. For additional information refer
toSection

204-00 Suspension System - General

Information

Tires show excess wear in center
of tread.

Tires over-inflated

Correct pressure to specification.

Other excessive tire wear
problems

Incorrect tire pressure

Correct pressure to specification.

Incorrect tire / wheel usage

Install correct tire and wheel combination.

Loose or leaking dampers

Tighten or install a new as necessary. For
additional information refer toSection

204-01 Front

Suspension

or Section

204-02 Rear Suspension

.

Geometry out of alignment

Check and adjust.

Loose, worn or damaged suspension components

Inspect, repair or install a new as necessary.

W heel and tire assembly out of balance

Balance wheel and tire assembly.

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

*

Excessive lateral or radial runout of wheel or tire

Check, repair or install a new as necessary. Refer to
the procedure in this section.

W heel mounting is difficult

Incorrect application or mismatched parts,
including wheel studs and wheel nuts. Corroded,
worn or damaged parts

Clean or install a new part.

W obble or shimmy affecting
wheel runout

Damaged wheel (eventually damaging wheel
bearings and causing uneven tire wear)

Inspect wheel rims for damage and runout. Install a
new wheel rim as necessary.

Excessive vibration, rough
steering or severe tire wear

Loose or incorrect attaching parts

Tighten or install new parts.

Vehicle vibrations

Tires / wheels mismatched

Install correct tire / wheel combination.

Inflation pressure too high or low

Correct pressure to specification.

Uneven tire wear

Refer to Diagnosis and Testing in this section.

Out-of-balance wheel, tire, wheel hub or disc
assembly

Determine the out-of-balance component and
balance or install a new part.

Damaged or distorted wheel from road impact
hazard or incorrect handling

Install a new wheel.

Excessive radial runout

Install a new wheel or tire. Check for incorrect
wheel and tire specifications.

Excessive lateral runout

Install a new wheel or tire.

Incorrectly seated tire

Remount the tire.

Loose wheel mountings - damaged wheel studs,
wheel nuts, worn or broken wheel hub face or
foreign material on mounting faces

Tighten or install new parts. Clean mounting
surfaces.

Defective wheel bearings

Install a new bearing set. For additional information
refer toSection

204-01 Front Suspension

or Section

204-02 Rear Suspension

Brake disc imbalance

For additional information refer to SectionSection

206-00 Brake System - General Information

W ater in tires

Remove water.

Loose engine or transmission mounts

Tighten or install a new mount.

Incorrect front end alignment

Align front end. For additional information refer
toSection

204-01 Front Suspension

Loose or worn driveline or suspension parts

Repair or install new parts.

Excessive driveshaft runout or imbalance

Install a new driveshaft, for additional information
refer toSection

205-01 Driveshaft

W orn or damaged flexible drive joint

Install a new drive shaft. For additional information
refer toSection

205-01 Driveshaft

Damaged wheel hub stud
threads

Sliding wheel across the wheel studs during
installation. Loose wheel nuts

Install new wheel studs.

Broken wheel studs

Loose or overtightened wheel nuts

Install new wheel studs.

Corrosion / contamination
streaks from the wheel hub
wheel stud holes

Loose wheel nuts

Check complete assembly. Install new parts. Follow
correct torque procedure.

W heel difficult to remove from
wheel hub

Corrosion

Apply a small amount of grease to the wheel hub
face and spigot location.

Damaged wheel nuts

Loose wheel assembly

Install new wheel nuts. Follow correct torque
procedure.

Over-tightened wheel nuts

Install new wheel nuts. Follow correct torque
procedure.

Frozen wheel nuts

Corrosion or galling

CAUTION: Do not permit lubricant to

contaminate wheel hub stud holes or wheel nut seats.

If corrosion is light, wire brush away corrosion. If
corrosion is excessive install new wheel studs and
wheel nuts.

Published: 11-May-2011

Wheels and Tires - Tire Low Pressure SensorVIN Range: J28493->V99999

Removal and Installation

Removal

• NOTE: It is strongly recommended that a new tire low pressure sensor O-ring seal, washer, nut, valve core and cap are installed each time
a tire is removed and installed. The O-ring seal, washer, nut, valve core and cap must be replaced if the tire low pressure sensor is
removed. Removal of the tire low pressure sensor retaining nut must be regarded as tire low pressure sensor removal. The tire low pressure
sensor valve cap must always be in place except when inflating, releasing pressure or checking pressure.

1. Remove the wheel and tire.

For additional information, refer to:

Wheel and Tire

(204-04 Wheels and

Tires, Removal and Installation).

2.

CAUTION: Make sure the tire bead is broken from the wheel rim

180 degrees from the tire low pressure sensor. Failure to follow this
instruction may result in damage to the tire low pressure sensor.

Remove the tire.

3.

CAUTION: Make sure you do not push on the tire low pressure

sensor valve. Failure to follow this instruction may result in damage to the
valve.

Remove the tire low pressure sensor.

Remove and discard the tire low pressure sensor retaining nut,
valve core, valve cap, O-ring seal and washer.

Installation

1.

CAUTION: The base of the valve stem must be held whilst pushing

on the new seal and washer. Failure to follow this instruction may result in
damage to the tire low pressure sensor.

• NOTE: Make sure that the washer and O-ring seal are installed correctly.
The flat face of washer must be seated against the sensor housing. The
taper of O-ring seal points towards the wheel.

Install a new washer and O-ring seal.

Install a new valve core and valve cap.

2.

CAUTION: Make sure solvents or cleaning agents of any type are

not used to clean the tire low pressure sensor. Failure to follow this
instruction may result in damage to the tire low pressure sensor.

• NOTE: If the tire low pressure sensor is replaced on a road wheel, the
new tire low pressure sensor identification code will be learnt when the
vehicle is first driven. If a new tire low pressure sensor is fitted to the
spare wheel the identification code for that tire low pressure sensor must
be programmed into the tire pressure monitoring system module. The
identification code is printed on the casing of each tire low pressure
sensor and is prefixed with ID.

Install the tire low pressure sensor.

1. Support the base of the valve stem when installing the tire

low pressure sensor.

2. Hold the tire low pressure sensor against the wheel rim when

tightening the retaining nut.

Install a new tire low pressure sensor retaining nut.

Tighten the nut to 8 Nm.

3.

CAUTION: Make sure no damage occurs to the tire low pressure

sensor.

Install the tire and balance the wheel.

4. Install the wheel and tire.

For additional information, refer to:

Wheel and Tire

(204-04 Wheels and

Tires, Removal and Installation).