2010 JAGUAR XFR tire pressure

Published: 11-May-2011
Noise, Vibration and Harshness - Noise, Vibration and Harshness (NVH)
Description and Operation

Noise, vibration and harshness (NVH) is becoming more important as vehicles become more sophisticated and passenger
comfort levels increase. This section is designed to aid in the diagnosis, testing and repair of NVH concerns.

Noise is defined as sounds not associated with the operation of passenger compartment equipment that interface with
customer satisfaction.
Vibration is defined as impulses felt by the customer that are not caused by road surface changes.
Harshness is a ride quality issue where the customer feels that the vehicle response to the road surface is sharply
transmitted to the customer.

Diagnostic Theory

Diagnosis is more than just following a series of interrelated steps in order to find the solution to the specific condition. It is a
way of looking at systems that are not functioning the way they should and finding out why. Also it is knowing how the system
should work and whether it is working correctly.

There are basic rules for diagnosis. If these rules are followed, the cause of the condition is usually found the first time
through the system.

Know the System

Know how the parts go together.
Know how the system operates as well as its limits and what happens when the system goes wrong.
Sometimes this means checking the system against one that is known to be working correctly.

Know the History of the System
A clue in any one of these areas may save time:
How old or new is the system?
What kind of treatment has it had?
Has it been repaired in the past in such a manner that might relate to the present condition?
What is the repair history?

Know the History of the Condition

Did it start suddenly or appear gradually?
Was it related to some other occurrence such as a collision or previous part renewal?
Know how the condition made itself known; it may be an important clue to the cause.

Know the Probability of Certain Conditions Developing

Look for the simple rather than the complex.
For example:
- Electrical conditions usually occur at connections rather than components.
- An engine no-start is more likely to be caused by a loose wire or small adjustment rather than a sheared-off
camshaft.
Know the difference between impossible and improbable. Certain failures in a system can be improbable but still
happen.
New parts are just that, new. It does not mean they are always good functioning parts.

Do Not Cure the Symptom and Leave the Cause

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.

Be Positive the Cause is Found

Double check the findings.
What caused a worn component?
A loose transmission or engine mount could indicate that other mounts are also loose.

Diagnostic Charts

Charts are a simple way of expressing the relationship between basic logic and a physical system of components. They help
discover the cause of a condition in the least time. Diagnostic charts combine many areas of diagnosis into one visual display:
probability of certain things occurring in a system
speed of checking certain components or functions before others
simplicity of carrying out certain tests before others
elimination of checking huge portions of a system by carrying out simple tests
certainty of narrowing down the search to a small portion before carrying out in-depth testing
The fastest way to find a condition is to work with the tools that are available. This means working with proven diagnostic
charts and the correct special equipment for the system.

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 conditions 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 luggage compartment 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 miles/h): With light acceleration, a moaning noise is heard and possibly a vibration is felt in the
front floor pan. 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 Symptom Chart.

2. Acceleration/deceleration: With slow acceleration and deceleration, a shake is sometimes noticed in the steering
wheel/column, seats, front floor pan, 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 brakes lightly. Refer to Idle Boom/Shake
/Vibration in the Symptom Chart.

3. High speed: A vibration is felt in the front floor pan 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 or shift control selector lever in
neutral 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 High Speed Shake in the 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 torque converter which turns at engine speed
when the vehicle is stopped. Refer to High Speed Shake in the Symptom Chart.

5. Noise/vibration while turning: Clicking, popping, or grinding noises may be due to a worn, damaged, or incorrectly
installed front wheel bearing, rear drive half shaft or CV joint.

6. Noise/vibration that is road speed relative: This noise/vibration can be diagnosed independent of engine speed or gear
selected (engine speed varies but torque and road speed remain constant). The cause may be a rear drive
axle/differential whine.
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 the condition has been corrected, make sure all components removed have been installed.

Lift Test

After a road test, it is sometimes useful to do a similar test on a lift.

When carrying out the high-speed shake diagnosis or engine accessory vibration diagnosis on a lift, observe the following
precautions:


WARNING: If only one drive wheel is allowed to rotate, speed must be limited to 55 km/h (35 miles/h) indicated on the
speedometer since actual wheel speed will be twice that indicated on the speedometer. Speed exceeding 55 km/h (35 miles/h)
or allowing the drive wheel to hang unsupported could result in tire disintegration, differential failure, constant velocity joint

Suspension System - General Information -
Vehicle Ride Height Published: 27-Aug-2013

NOTE: All figures are at "Kerb" height - For additional information, refer to Vehicle Ride Height below.

Description Measurement Description Front/Rear Kerb mm (inch) Tolerance mm (inch) Vehicles without supercharger Front 388 (15.28) ±12 (0.5) Rear 391 (15.39) ±12 (0.5) Vehicles with supercharger Front 385 (15.16) ±12 (0.5) Rear 384 (15.12) ±12 (0.5) Vehicles with All wheel drive Front 404 (15.90) ±12 (0.5) Rear 391 (15.39) ±12 (0.5)
Ride height is measured from the centre of the wheel to the apex of the wheel arch, through the wheel centre line.
Kerb - with all fluids at full and a full tank of fuel, no occupants/luggage.
Tires must be inflated to normal pressure -
For additional information, refer to: Specifications (204-04 Wheels and Tires, Specifications). Wheel Alignment - Front Camber

NOTE: *1 Camber Balance = left-hand camber - right-hand camber.

Description Left-hand Right-hand Balance*1 Markets Degrees/Minutes Nominal Tolerance Nominal Tolerance Nominal Tolerance All right-hand drive and Japan Degrees/Minutes -0° 36' ±45' -0° 12' ±45' -0° 24' ±45' Decimal Degrees -0.6° ±0.75° -0.2° ±0.75° -0.4° ±0.75° USA, Canada, Mexico and Dominican Republic
(Federal) Degrees/Minutes -0° 12' ±45' -0° 33' ±45' 0° 21' ±45' Decimal Degrees -0.2° ±0.75° -0.55° ±0.75° 0.35° ±0.75° Rest of world Degrees/Minutes -0° 12' ±45' -0° 24' ±45' 0° 12' ±45' Decimal Degrees -0.2° ±0.75° -0.4° ±0.75° 0.2° ±0.75° Vehicles with All wheel drive Degrees/Minutes -0° 11' ±45' -0º 32' ±0.45' 21' ±45' Decimal Degrees -0.19° ±0.75º -0.54º ±0.75º 0.35º ±0.75° Wheel Alignment - Front Caster

NOTE: *2 Caster Balance = left-hand caster - right-hand caster.

Description Left-hand Right-hand Balance*2 Markets Degrees/Minutes Nominal Tolerance Nominal Tolerance Nominal Tolerance All right-hand drive and Japan Degrees/Minutes 6° 53' ±45' 6° 20' ±45' 0° 33' ±45' Decimal Degrees 6.88° ±0.75° 6.33° ±0.75° 0.55° ±0.75° USA, Canada, Mexico and Dominican Republic
(Federal) Degrees/Minutes 6° 36' ±45' 6° 45' ±45' -0° 8' ±45' Decimal Degrees 6.61° ±0.75° 6.74° ±0.75° -0.14° ±0.75° Rest of world Degrees/Minutes 6° 36' ±45' 6° 36' ±45' 0° 0' ±45' Decimal Degrees 6.61° ±0.75° 6.61° ±0.75° 0° ±0.75° Vehicles with All wheel drive Degrees/Minutes 6° 2' ± 45' 6° 11' ± 45' - 9' ± 45' Decimal Degrees 6.04º ±0.75° 6.19° ± 0.75° -0.15° ± 0.75° Wheel Alignment - Front Toe
Description Total Toe Markets Degrees/Minutes Nominal Tolerance All right-hand drive and Japan Degrees/Minutes 0° 13' ±12' Decimal Degrees 0.22° ±0.20° USA, Canada, Mexico and Dominican Republic (Federal) Degrees/Minutes 0° 13' ±12' Decimal Degrees 0.22° ±0.20° Rest of world Degrees/Minutes 0° 13' ±12' Decimal Degrees 0.22° ±0.20° Vehicles with All wheel drive Degrees/Minutes 16' ± 12' Decimal Degrees 0.27° ± 0.20° Wheel Alignment - Rear Camber (Vehicles without supercharger)
Description Left-hand Right-hand Markets Degrees/Minutes Nominal Tolerance Nominal Tolerance All Markets Degrees/Minutes -0° 47' ±45' -0° 47' ±45' Decimal Degrees -0.78° ±0.75° -0.78° ±0.75° Wheel Alignment - Rear Camber (Vehicles with supercharger)
Description Left-hand Right-hand Markets Degrees/Minutes Nominal Tolerance Nominal Tolerance All Markets Degrees/Minutes -0° 59' ±45' -0° 59' ±45'

Front Suspension (204-01 Front Suspension, Description and Operation), Front Suspension (204-01 Front Suspension, Description and Operation), Rear Suspension (204-02 Rear Suspension, Description and Operation), Rear Suspension (204-02 Rear Suspension, Description and Operation), Rear Suspension (204-02 Rear Suspension, Description and Operation).
Inspection and Verification

1. Verify the customer concern by carrying out a road test on a smooth road. If any vibrations are apparent, refer to
section 100-04 Noise, Vibration and Harshness.
2. Visually inspect for obvious signs of damage and system integrity.



3. If an obvious cause for an observed or reported condition is found, correct the cause (if possible) before proceeding to
the next step.
4. If the fault is not visually evident, verify the symptom and refer to the following Symptom Chart.

Symptom Chart

Symptom Possible Sources Action Crabbing * Incorrect rear thrust angle. * Check the rear toe adjustment.
REFER to: Rear Toe Adjustment (204-00 Suspension System - General Information, General Procedures). * Front or rear suspension components.
* Inspect the front and rear suspension systems. Repair or
install new suspension components as necessary. * Drive axle damaged. * Install a new rear drive axle/differential.
REFER to: Axle Assembly - V6 3.0L Petrol (205-02 Rear Drive Axle/Differential, Removal and Installation). Drift/Pull * Unequal tire pressure.
* Check and adjust the tire pressures. Inspect the tire for
excessive wear.
REFER to: Specifications (204-04 Wheels and Tires, Specifications). * Incorrect wheel alignment.
* Check and adjust the wheel alignment. REFER to:
(204-00 Suspension System - General Information)
Front Toe Adjustment (General Procedures), Rear Toe Adjustment (General Procedures), Camber and Caster Adjustment (General Procedures). * Tires.
* Check and adjust the tire pressures. Inspect the tire for
excessive wear.
REFER to: Specifications (204-04 Wheels and Tires, Specifications). * Unevenly loaded or overloaded vehicle. * Notify the customer of incorrect vehicle loading. * Damaged steering components. * Check the steering system. * Brake drag. * Check the brakes.
REFER to: Brake System (206-00 Brake System - General Information, Diagnosis and Testing). Mechanical

Damaged tires
Wheel bearing(s)
Loose or damaged front or rear suspension components
Loose, damaged or missing suspension fastener(s)
Incorrect spring usage
Damaged or sagging spring(s)
Damaged or leaking shock absorber(s)
Damaged or leaking strut(s)
Worn or damaged suspension bushing(s)
Loose, worn or damaged steering system components
Damaged axle components Visual Inspection Chart

Removal and Installation),
Shock Absorber and Spring Assembly (204-02 Rear Suspension, Removal and Installation). Incorrect Tire Wear
* Incorrect tire pressure (rapid center rib
or inner and outer edge wear). * Check and adjust the tire pressure. Inspect the tire for
excessive wear.
REFER to: Specifications (204-04 Wheels and Tires, Specifications). * Excessive front or rear toe (rapid inner
or outer edge wear). * Check and adjust the wheel alignment. REFER to:
(204-00 Suspension System - General Information)
Front Toe Adjustment (General Procedures), Rear Toe Adjustment (General Procedures), Camber and Caster Adjustment (General Procedures). * Excessive negative or positive camber
(rapid inner or outer edge wear). * Check and adjust the wheel alignment. REFER to:
(204-00 Suspension System - General Information)
Front Toe Adjustment (General Procedures), Rear Toe Adjustment (General Procedures), Camber and Caster Adjustment (General Procedures). * Tires out of balance (tires cupped or dished). * Balance the tires. Rough ride * Spring(s)
* Check and install new spring(s) as necessary. REFER to:
Front Shock Absorber (204-01 Front Suspension, Removal and Installation),
Shock Absorber and Spring Assembly (204-02 Rear Suspension, Removal and Installation). Shimmy or Wheel Tramp * Loose wheel nut(s).
* Check and tighten the wheel nuts to specification.
REFER to: Specifications (204-04 Wheels and Tires, Specifications). * Loose front suspension fasteners.
* Check and tighten the suspension fasteners to
specification.
REFER to: Specifications (204-00 Suspension System - General Information, Specifications). * Front wheel bearing(s). * Check the wheel bearings. * Worn or damaged suspension component bushing. * Check and install new components as necessary. * Wheel/tires.
* Check the wheels/tires. Balance or install new
wheel/tires as necessary.
REFER to: Wheels and Tires (204-04 Wheels and Tires, Diagnosis and Testing). * Loose, worn or damaged ball joint(s). * Check the Ball Joint(s). * Loose, worn or damaged steering components. * Check and install new components as necessary. * Front wheel alignment.
* Check and adjust the wheel alignment. REFER to:
(204-00 Suspension System - General Information)
Front Toe Adjustment (General Procedures), Rear Toe Adjustment (General Procedures), Camber and Caster Adjustment (General Procedures). * Shock absorber(s). * Check and install new shock absorber(s) as necessary.
REFER to:
Front Shock Absorber (204-01 Front Suspension, Removal and Installation),
Shock Absorber and Spring Assembly (204-02 Rear Suspension, Removal and Installation). * Spring(s).
* Check and install new springs as necessary. REFER to:
Front Shock Absorber (204-01 Front Suspension, Removal and Installation),
Shock Absorber and Spring Assembly (204-02 Rear Suspension, Removal and Installation). Poor self center action of
the steering * Ball joints. * Check the Ball Joints. * Steering components. * Check and install new components as necessary. Steering wheel off-center * Unequal front or rear toe settings.
* Check and adjust the wheel alignment. REFER to:
(204-00 Suspension System - General Information)
Front Toe Adjustment (General Procedures), Rear Toe Adjustment (General Procedures), Camber and Caster Adjustment (General Procedures). * Steering components. * Check and install new components as necessary. Sway or roll
* Overloaded, unevenly or incorrectly
loaded vehicle. * Notify the customer of incorrect vehicle loading. * Loose wheel nut(s).
* Check and tighten the wheel nut(s) to specification.
REFER to: Specifications (204-04 Wheels and Tires, Specifications). * Coil spring(s).
* Check and install new coil springs as necessary. REFER
to:
Front Shock Absorber (204-01 Front Suspension, Removal and Installation),

Published: 16-Oct-2013
Suspension System - General Information - Four-Wheel Alignment
General Procedures
CAUTIONS:

Make sure the vehicle is on a flat level surface.
Make sure the tire pressures are within specification.
Make sure that only the manufacturers' recommended four wheel alignment equipment is used.
Make sure the steering is in the straight ahead position.
1. For wheel alignment information, refer to the suspension specification
section.
For additional information, refer to: Specifications (204-00 Suspension System - General Information, Specifications).

2. Check the tie rod ends, suspension joints, wheel bearings and wheels
and tires for damage, wear and free play.
Adjust or repair any worn, damaged or incorrectly adjusted
components.

3. Check and adjust tire pressures.

4. Position the vehicle on a calibrated, level, vehicle lift.

5. Vehicles with air suspension.
For additional information, refer to: Air Suspension Manual Tight
Tolerance Setting Mode (204-05, General Procedures).

6. Release the vehicle parking brake.

7. Using only four-wheel alignment equipment approved by Jaguar, check
the wheel alignment.


8. NOTE: LH illustration shown, RH is similar. To
adjust, loosen the toe link locknuts. www.JagDocs.com

Published: 16-Oct-2013
Suspension System - General Information - Front Toe Adjustment
General Procedures
CAUTIONS:

Make sure the vehicle is on a flat level surface.
Make sure the tire pressures are within specification.
Make sure that only the manufacturers' recommended four wheel alignment equipment is used.
Make sure the steering is in the straight ahead position.
1. For wheel alignment information, refer to the suspension specification
section.
For additional information, refer to: Specifications (204-00 Suspension System - General Information, Specifications).

2. Check the tie rod ends, suspension joints, wheel bearings and wheels
and tires for damage, wear and free play.
Adjust or repair any worn, damaged or incorrectly adjusted
components.

3. Check and adjust tire pressures.

4. Position the vehicle on a 4 post lift.

5. Release the vehicle parking brake.

6. Vehicles with air suspension.
For additional information, refer to: Air Suspension Manual Tight
Tolerance Setting Mode (204-05, General Procedures).

7. For additional information, refer to: Air Suspension Manual Tight
Tolerance Setting Mode (204-05, General Procedures).

8. Using only four-wheel alignment equipment approved by Jaguar, check
the wheel alignment.


9. NOTE: LH illustration shown, RH is similar. To
adjust, loosen the tie rod end lock nuts.

Wheel nuts 125 92 - Tire Pressures
Summer Tyres (ROW) Up to 100 mph Over 100 mph 235/55R17 99W Front 2.3 bar (34 lbf/in²) 2.3 bar (34 lbf/in²) Rear 2.3 bar (34 lbf/in²) 2.3 bar (34 lbf/in²) 245/45R18 100 W&Y X/L Front 2.1 bar (31 lbf/in²) 2.6 bar (38 lbf/in²) Rear 2.1 bar (31 lbf/in²) 2.6 bar (38 lbf/in²) 245/40R19 98 Y X/L Front 2.1 bar (31 lbf/in²) 2.5 bar (36 lbf/in²) Rear 2.1 bar (31 lbf/in²) 2.5 bar (36 lbf/in²) 235/35R20 97Y X/L Front 2.3 bar (34 lbf/in²) 2.3 bar (34 lbf/in²) Rear - - 285/30R20 99y X/L Front - - Rear 2.3 bar (34 lbf/in²) 2.3 bar (34 lbf/in²) Tire Pressures
All Season Tyres (USA & Canada) 0 mph - 121 mph 245/45R18 96H Front 2.1 bar (31 lbf/in²) Rear 2.1 bar (31 lbf/in²) 245/40R19 94H Front 2.4 bar (35 lbf/in²) Rear 2.4 bar (35 lbf/in²) Wheel Specification
Wheel Type Wheel Size Libra 7.5 x 17 Cygnus 8.5 x 18 Venus 8.5 x 18 Auriga 8.5 x 19 Carelia 8.5 x 19 Volans (front) 8.5 x 20 Volans (rear) 9.5 x 20 Selena 8.5 x 20 Tires and Fitment

Description Wheels Type
Tire Type Vehicles with 2.7L Diesel and 3.0L engine Libra 235/55R17 99W Pirelli P7 Cygnus 245/45R18 100W Dunlop SP01 Vehicles without supercharger Cygnus 245/45R18 100W Dunlop SP01 Vehicles without supercharger (ROW) Venus 245/45R18 100Y Pirelli PZero Carelia 245/40R19 98Y Dunlop SP01 Auriga 245/40R19 98Y Dunlop SP01 Vehicles without supercharger (ROW) and vehicles with supercharger (USA &
Canada) Cygnus
245/45R18 96H Continental
ProContact Auriga
245/40R19 96H Continental
ProContact Vehicles with supercharger
Volans (front) 255/35R20 97Y Pirelli PZero Volans (rear) 285/30R20 99Y Pirelli PZero