temperature JAGUAR XFR 2010 1.G Repair Manual

60 Oil seal The multi-plate clutch is contained in a clutch basket attached to the differential carrier with the crown wheel securing bolts.
Alternate plates of the clutch pack are keyed to the clutch basket and the LH sun gear. A pressure disc is installed on the outer end of the clutch pack and keyed to the clutch basket. A thrust race on the end of the clutch basket incorporates lugs which
extend through the clutch basket onto the pressure disc.

The actuator assembly is mounted on bearings on the outboard end of the clutch basket, against the thrust race. The actuator
assembly consists of input and output actuators separated by five ball bearings. A locking pin in the cover engages with a slot
in the output actuator to prevent it turning, but allow it to move axially. The input actuator engages with the reduction gearbox
and is free to rotate relative to the cover. Ball bearings locate in curved grooves in the mating faces of the input and
output actuators. The bottom surface of each groove incorporates a ramp. Rotation of the input actuator forces the ball
bearings up the ramps in the grooves and induces an axial movement in the output actuator. The thrust race and pressure disc
transfer the axial movement from the output actuator to the clutch pack.



Item Description 1 Actuator 2 Multi-plate clutch 3 Differential The motor is a 12 V dc motor that adjusts the frictional loading of the multi-plate clutch, via the reduction gearbox and the
actuator assembly, under the control of the DLM. Adjusting the frictional loading of the multi-plate clutch adjusts the locking
torque between the crown wheel drive gear and the sun wheel.

Four bolts attach the motor to the reduction gearbox, which is located in position on the cover with two dowels, and secured
with four bolts. An O-ring seals the joint between the motor and the reduction gearbox.

The motor is driven by a 12 V dc feed direct from the DLM. The motor also incorporates the following connections with the
DLM:

A motor temperature sensor, to prevent excessive use from damaging the motor.
Two Hall effect motor position sensors, to enable closed loop control of the motor.

The temperature sensor provides a differential oil temperature signal to the DLM, to prevent excessive use from damaging the
multi-plate clutch.

Differential Locking Module (DLM)

The DLM controls operation of the electronic differential. The DLM is attached to a bracket located on the LH side of the luggage compartment, immediately forward of the fender tail lamp, behind the trim.

bus allows the DLM to communicate with other systems on the vehicle.

A certain amount of differential slip is required to allow the vehicle to turn corners and to remain stable under control of the
ABS. The ADM monitors the driver's demands through primary vehicle controls and automatically sets the slip torque in the differential. The system is completely automatic and does not require any special driver input.
The differential strategy in the ADM includes:

A pre-loading function, increasing locking torque with increased driving torque.
A slip controller to decrease locking torque for optimum comfort, e.g. parking.
The ADM memorizes the position of the motor when the ignition is switched off.

CAN bus messages used by the ADM include wheel speed, steering angle, automatic transmission speed, temperature information, car configuration, axle ratios and mode inputs.

The ADM also sends messages via the CAN bus to tell other control modules on the network the status of the electronic differential. The clutch torque and default mode status are some of the main signals sent out by the ADM.

If the DLM or ADM are replaced, a Jaguar approved diagnostic system must be connected to the vehicle and the differential
self-calibration procedure must be performed. This procedure must also be performed if the motor or electronic differential is
replaced.

If a fault occurs with the electronic differential, the ADM, the DLM, or one of the required input signals, the ADM records an
error code and displays a warning in the message center.
The following messages can be displayed:

Message Description Chime E-DIFF NOT
AVAILABLE Differential temperature has reached the overheat threshold. System deactivated until temperature
returns within limits. Single E-DIFF FAULT Fault has occurred with electronic differential. System deactivated until fault rectified. Single

Check for external brake system leaks. For additional information, refer to brake master cylinder component test in this section. Is there a leak present? Yes
Repair as necessary, add fluid and bleed brake system.
REFER to: Brake System Bleeding (206-00 Brake System - General Information, General Procedures). Re-test the system for normal operation.
No
No action required, system is OK.
PINPOINT TEST F : THE PEDAL GOES DOWN SLOWLY TEST
CONDITIONS DETAILS/RESULTS/ACTIONS F1: ROAD TEST VEHICLE - CHECK BRAKE PEDAL OPERATION 1 Check if the condition occurs during actual stopping application by applying the brake pedal while the vehicle is moving. Does the condition occur when the vehicle is moving? Yes
GO to F2. No
GO to F3. F2: CHECK FOR BRAKE SYSTEM LEAKS 1 Check for external brake system leaks. For additional information, refer to brake master cylinder component test in this section. Are there any external brake system leaks? Yes
Rectify as necessary. Add fluid and bleed the brake system.
REFER to: Brake System Bleeding (206-00 Brake System - General Information, General Procedures). Re-test the system for normal operation.
No
GO to F3. F3: CARRY OUT A BRAKE MASTER CYLINDER BYPASS TEST 1 Test for brake master cylinder bypass condition. Refer to Brake master cylinder component test in this section. Has a concern been identified? Yes
Install a new brake master cylinder, add fluid and bleed the brake system.
REFER to: Brake System Bleeding (206-00 Brake System - General Information, General Procedures). Re-test the system for normal operation.
No
No action required, system is OK.
PINPOINT TEST G : EXCESSIVE BRAKE PEDAL EFFORT TEST
CONDITIONS DETAILS/RESULTS/ACTIONS G1: CHECK BRAKE PADS 1 Check the brake pads for wear, contamination, correct installation, damage and type. Has a concern been identified?
Yes
Correctly install or install new brake pads as required. REFER to:
Brake Pads - Vehicles With: Standard Brakes (206-03A Front Disc Brake - V6 3.0L Petrol, Removal and Installation),
Brake Pads - Vehicles With: High Performance Brakes (206-03A Front Disc Brake - V6 3.0L Petrol, Removal and Installation),
Brake Pads (206-04A Rear Disc Brake - V6 3.0L Petrol, Removal and Installation), Brake Pads - Vehicles With: High Performance Brakes (206-04, Removal and Installation).
Re-test the system for normal operation.
No
GO to G2. G2: CHECK VACUUM 1 Disconnect the vacuum hose from the brake booster. 2 Connect a vacuum/pressure tester to the vacuum hose. 3 Run the engine at normal operating temperature. 4 Record the vacuum reading. Is the reading 40.5 kPa (12 in-Hg) or greater?
Yes
GO to G3. No
Locate and rectify the source of low vacuum. Re-test the system for normal operation. G3: INSPECT SYSTEM 1 Switch the engine off. 2 Reconnect the vacuum hose.

battery power supply to be passed via the slip ring assembly in the steering wheel to the heated steering wheel control
module. The steering wheel module supplies power to the steering wheel heater element and also monitors the temperature
via a NTC (negative temperature coefficient) temperature sensor incorporated into the heater element. The control module
varies the power supply to the element to maintain the steering wheel rim at the optimum temperature.

Component Description STEERING COLUMN MULTIFUNCTION SWITCHES
The steering column multifunction switches are situated on the steering column and consists of the wiper switch, the turn
signal indicator/lighting switch and the trip computer switch.

The steering column adjustment switch is located in the steering column lower shroud on the LH side. The switch is a 4 position 'joystick' which controls reach and rake adjustment.

Steering wheel mounted switches on the LH side of the driver's airbag, control the audio and telephone functions. Switches on the RH side of the driver's airbag, control the speed control functions. For additional information, refer to:
Audio System (415-01A Information and Entertainment System, Description and Operation), Speed Control (310-03A, Description and Operation),
Speed Control (310-03B, Description and Operation),
Speed Control (310-03C, Description and Operation).

Two transmission paddle switches are located at the rear of the steering wheel.
Refer to: External Controls (307-05, Description and Operation).
LH Multifunction Switch



Item Description 1 High beam 2 Lighting control rotary switch 3 RH turn signal indicator 4 Headlamp flash 5 LH turn signal indicator 6 Trip computer function button The LH multifunction switch controls the following windshield wiper functions:

automatically reset once the applicable remote handset has been detected by the vehicle security systems.

STEERING WHEEL HEATER

On certain models the rim of the steering wheel contains a heater element. Operation of the heater is selected using the
Touch Screen Display (TSD).

The heater temperature is controlled by a heated steering wheel control module located within the steering wheel. Power for
the heater element is supplied to the steering wheel via 2 contacts on the clockspring and a slip ring mounted on the steering
wheel.

Component Tests
Engine Oil Leaks


NOTE: Before installing new gaskets or oil seals, make sure that the fault is clearly established.

If the oil leak cannot be identified clearly by a visual inspection, carry out an Ultraviolet test:

Fluorescent Oil Additive Method

1. Clean the engine with a suitable cleaning fluid (brake cleaner).

2. Drain the engine oil and refill with recommended oil, premixed with Diesel Engine Oil Dye or equivalent. Use a minimum
14.8 ml (0.5 ounce) to a maximum 29.6 ml (1 ounce) of fluorescent additive to all engines. If oil is not premixed,
fluorescent additive must first be added to the crankcase.

3. Run engine for 15 minutes. Stop the engine and inspect all seal and gasket areas for leaks using a 12 Volt Master UV
Diagnostic Inspection Kit or equivalent. A clear bright yellow or orange area will identify leak. For extremely small
leaks, several hours may be required for the leak to appear.

4. As necessary, pressurize the main oil gallery system to locate leaks due to incorrectly sealed, loose or cocked plugs. If
the flywheel bolts leak oil, look for sealer on the threads.
5. Repair all leaks as necessary.

Compression Test General Remarks
NOTES:

Removing fuses and disconnecting electrical components may cause the Engine Control Module (ECM) to log Diagnostic
Trouble Codes (DTCs). After the measurements have been carried out, DTCs should be cleared from memory by connecting to
the Manufacturer Approved Diagnostic System.


Only check the compression pressure with the valves set to the prescribed clearance (if this can be adjusted).
The compression pressure should be checked with the engine at normal operating temperature.

Check the Compression Pressure


WARNING: Move gear selector lever to 'P' position. Failure to follow this instruction may result in personal injury.
1. Remove the fuel pump relay.

2. Start the engine - the engine will start, run for a few seconds then stall.

3. Remove the spark plugs.
4. Install the compression tester.

5. Install an auxiliary starter switch in the starting circuit. With the ignition switch OFF, using the auxiliary starter switch,
crank the engine a minimum of five compression strokes and record the highest reading. Note the approximate number
of compression strokes required to obtain the highest reading.
6. Repeat the test on each cylinder, cranking the engine approximately the same number of compression strokes.
7. Install the removed components in reverse order, observing the specified tightening torques.

8. Clear all DTCs from the ECM.
Interpretation of the Results


NOTE: Due to the possibility of loose carbon that has become trapped between the valve face and seat effecting the
pressure readings, when carrying out a compression test and cylinders are found to have low pressures, install the spark plugs,
road test the vehicle and re-test the suspect cylinders. If the correct pressures are restored, no further action is required.

The indicated compression pressures are considered within specification if the lowest reading cylinder is within 75% of the
highest reading.

If the cylinder pressures are found to be low, carry out a leakdown test to determine the location of the fault (if any leakback
can be heard through the engine breather system suspect the piston rings, if any leakback can be heard through the inlet
system suspect the inlet valve or seat, if any leakback can be heard through the exhaust manifold suspect the exhaust valve
or seat. If the measurements for two cylinders next to each other are both too low then it is very likely that the cylinder head
gasket between them is burnt through. This can also be recognized by traces of engine oil in the coolant and/or coolant in the

engine oil).

Oil Consumption Test

The amount of oil an engine uses will vary with the way the vehicle is driven in addition to normal engine-to-engine variation.
This is especially true during the first 16,100 km (10,000 miles) when a new engine is being broken in or until certain internal
components become conditioned. Vehicles used in heavy-duty operation may use more oil. The following are examples of
heavy-duty operation:

Trailer towing applications
Severe loading applications
Sustained high speed operation
Engines need oil to lubricate the following internal components:
Cylinder block cylinder walls
Pistons and piston rings
Intake and exhaust valve stems
Intake and exhaust valve guides
All internal engine components

When the pistons move downward, a thin film of oil is left on the cylinder walls. As the vehicle is operated, some oil is also
drawn into the combustion chambers past the intake and exhaust valve stem seals and burned.
The following are examples of conditions that can affect oil consumption rates:
Engine size
Operator driving habits
Ambient temperatures
Quality and viscosity of oil
Engine is being run in an overfilled condition (check the oil level at least five minutes after a hot shutdown with the
vehicle parked on a level surface. The oil level should not be above the top of the cross-hatched area and the letter "F"
in FULL).

Operation under varying conditions can frequently be misleading. A vehicle that has been run for several thousand miles on
short trips or in below-freezing ambient temperatures may have consumed a "normal" amount of oil. However, when checking
the engine oil level, it may measure up to the full mark on the oil level indicator due to dilution (condensation and fuel) in the
engine crankcase. The vehicle then might be driven at high speeds on the highway where the condensation and fuel boil off.
The next time the engine oil is checked it may appear that a liter of oil was used in about 160 km (100 miles). Oil
consumption rate is about one liter per 2,400 km (1,500 miles).

Make sure the selected engine oil meets Jaguar specification and the recommended API performance category "SG" and SAE
viscosity grade as shown in the vehicle Owner's Guide. It is also important that the engine oil is changed at the intervals
specified for the typical operating conditions.
The following diagnostic procedure is used to determine the source of excessive oil consumption.


NOTE: Oil use is normally greater during the first 16,100 km (10,000 miles) of service. As mileage increases, oil use
decreases. High speed driving, towing, high ambient temperature and other factors may result in greater oil use.

1. Define excessive consumption, such as the number of miles driven per liter of oil used. Also determine customers
driving habits, such as sustained high speed operation, towing, extended idle and other considerations.
2. Verify that the engine has no external oil leaks as described under Engine Oil Leaks in this section.
3. Carry out an oil consumption test:
Run the engine to normal operating temperature. Switch engine OFF and allow oil to drain back for at least five
minutes .
With vehicle parked on level surface, check the engine oil level.
If required, add engine oil to set level exactly to the FULL mark.
Record the vehicle mileage.
Instruct the customer to return for a level check after driving the vehicle as usual for 1,610 km (1000 miles).
Check the oil level under the same conditions and at the same location as the initial check.

NOTE: If the oil consumption rate is unacceptable go to Step 4.

4. Check the Positive Crankcase Ventilation (PCV) system. Make sure the system is not plugged.

5. Check for plugged oil drain-back holes in the cylinder head and cylinder block.
6. If the condition still exists after carrying out the above tests go to step 9.

7. Carry out a cylinder compression test. Refer to the Compression Test procedure in this section. This can help determine
the source of oil consumption such as valves, piston rings or other areas.
8. Check valve guides for excessive guide clearance. Install new valve stem seals after verifying valve guide clearance.

9. Worn or damaged internal engine components can cause excessive oil consumption. Small deposits of oil on the tips of
the spark plugs can be a clue to internal oil consumption.

9. WEAK VALVE SPRINGS: When the needle oscillation becomes more violent as engine RPM is increased, weak valve
springs are indicated. The reading at idle could be relatively steady.
10. LATE VALVE TIMING: A steady but low reading could be caused by late valve timing.

11.
IGNITION TIMING RETARDED: Retarded ignition timing will produce a steady but somewhat low reading.
12.
INSUFFICIENT SPARK PLUG GAP: When spark plugs are gapped too close, a regular, small pulsation of the needle can
occur.
13. INTAKE LEAK: A low, steady reading can be caused by an intake manifold or throttle body gasket leak.

14.
BLOWN HEAD GASKET: A regular drop of fair magnitude can be caused by a blown head gasket or warped cylinder head
to cylinder block surface.
15.
RESTRICTED EXHAUST SYSTEM: When the engine is first started and is idled, the reading may be normal, but as the
engine RPM is increased, the back pressure caused by a clogged muffler, kinked tail pipe or other concerns will cause
the needle to slowly drop to 0 kPa (0 in-Hg). The needle then may slowly rise. Excessive exhaust clogging will cause
the needle to drop to a low point even if the engine is only idling.

When vacuum leaks are indicated, search out and correct the cause. Excess air leaking into the system will upset the fuel
mixture and cause concerns such as rough idle, missing on acceleration or burned valves. If the leak exists in an accessory
such as the power brake booster, the unit will not function correctly. Always repair vacuum leaks.

Engine Oil Pressure Check


NOTE: Prior to checking the engine oil pressure, a road test of 6 miles (10 kilometres), must be carried out. Do not
attempt to attain engine normal operating temperature by allowing the engine to idle.

1. Disconnect the battery ground cable. Refer to section 414-00 - Charging System - General Information of the workshop
manual
2. WARNINGS:
The spilling of hot engine oil is unavoidable during this procedure, care must be taken to prevent scalding.
Wear protective gloves.

Remove the engine oil filter element
REFER to: Oil Filter Element (303-01C Engine - V8 5.0L Petrol, Removal and Installation).
NOTE: Ensure the oil filter element is not contaminated during this procedure
3. Install the oil filter element into special tool (Oil filter adapter number 303-1451)

4. Install the special tool (Oil filter adapter number 303-1451) to the engine. Torque: 25 Nm

5. Install the special tool (Oil pressure testing gauge, 303-871) and tighten the union
6. Connect the battery ground cable

7. Refer to owner hand book, check and top-up the engine oil if required

8. Start and run the engine
9. Note the oil pressure readings with the engine running at idle and 3500 RPM

10.
Turn off the engine

11.
Disconnect the battery ground cable
12. Remove the special tools
1. Clean the components

13.
Install the engine oil filter element
REFER to: Oil Filter Element (303-01C Engine - V8 5.0L Petrol, Removal and Installation).
NOTE: Ensure the oil filter element is not contaminated during this procedure

14.
Connect the battery ground cable
15. Refer to owner hand book, check and top-up the engine oil if required
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Item Specification Camshaft journal maximum run out limit (mm) Camshaft journals to end journals 0.03 Camshaft journals to adjacent journals 0.015 Camshaft journal maximum out of round (mm) - all journals 0.005 Torque Specification

NOTE: A = Refer to procedure for correct torque sequence.

Description Nm lb-ft lb-in Engine cover mounting bolts 10 7 - Accessory drive belt tensioner retaining bolt 40 30 - Supercharger belt idler/tensioner bracket retaining bolts 25 18 - Secondary drive belt idler retaining bolts 40 30 - Power steering pump pulley retaining bolts 25 18 - Power steering pump retaining bolts 25 18 - Power steering pump bracket to engine retaining bolts 25 18 - Generator retaining bolts 48 35 - Starter motor retaining bolts 48 35 - Air conditioning compressor retaining bolts 25 18 - Engine mounting to engine mounting bracket retaining nuts 48 35 - Engine mounting to subframe retaining nuts 63 46 - Engine mounting bracket to engine retaining bolts 48 35 - Crankshaft damper pulley retaining LH threaded bolt 200 + 270° 148 + 180° - Flexplate retaining bolts 45 + 90° 33 + 90° - Exhaust manifold heat shield retaining bolts A - - Exhaust manifold retaining bolts A - - Engine wiring harness bracket retaining bolts 10 7 - Coolant outlet pipe 10 7 - Intercooler retaining bolts 25 18 - Intake manifold retaining bolts 25 18 - Oil Cooler retaining bolts 13 10 - Knock sensor (KS) retaining bolt 20 14 - Ignition coil retaining bolts 8 - 71 Spark plugs 20 15 - Fuel rail retaining bolts A - - High pressure fuel pipe retaining bolts A - - High pressure fuel pump retaining bolts 12 9 - Oil filter housing assembly retaining bolts 12 9 - Oil filter cap 28 21 - Lifting eye bolts 25 + 90° 18 + 90° - Manifold absolute pressure and temperature (MAPT) sensor sensor retaining bolts 5 - 44 Coolant pump retaining bolts 12 9 - Variable valve timing (VVT) oil control solenoid retaining bolts 10 7 - Camshaft position (CMP) sensor retaining bolts 10 7 - Camshaft cover retaining bolts 13 10 - Front upper timing cover retaining bolts 12 9 - Front lower timing cover retaining bolts A - - Engine rear cover retaining bolts A - - VVT to camshaft retaining bolts 32 24 - Camshaft bearing caps retaining bolts 11 8 - Primary timing chain fixed guide retaining bolts 12 9 - Primary timing chain tensioner retaining bolts 12 9 - Primary timing chain tensioner guide blade retaining bolts 25 18 - Auxiliary chain tensioner guide retaining bolts 21 15 - Auxiliary chain fixed guide retaining bolt 12 9 - Oil pump sprocket retaining bolt 21 15 - Cylinder head retaining bolts A - - Engine oil level (EOL) sensor retaining bolt 12 9 - Oil pan to oil sump body retaining bolts 12 9 - Oil sump body to engine retaining bolts 25 18 - Oil pan drain plug 23 17 - Oil transfer tube to Oil pan body retaining bolts 11 8 - Oil pump to engine block retaining bolts 25 18 - Pick-up pipe to oil pump retaining bolts 12 9 - Windage tray retaining bolts 25 18 - Piston cooling jet retaining bolts 12 9 - Engine block coolant draining plug 50 37 - Connecting Rod bolts Stage 1 10 7 - Stage 2 50 37 -

1 Cylinder head 2 Gasket 3 Heat shield 4 Gasket 5 Exhaust manifold 6 Bolt (8 off) 7 Heat shield 8 Bolt (4 off) 9 Spacer (8 off) The high SiMo (silicon molybdenum) cast iron exhaust manifolds are unique for each cylinder bank. Each exhaust manifold
installation includes two metal gaskets and two heat shields. Spacers on the securing bolts allow the manifolds to expand and
contract with changes of temperature while maintaining the clamping loads. NOTE: LH (B bank) installation shown, RH (A bank) installation similar.