Page 593 of 3039
Petrol/V8 S/C 5.0L Petrol (Removal and Installation). If the rear hub runout exceeds the specifications, install a new
hub, brake disc and recheck.
For additional information, refer to: Rear Wheel Bearing (204-02 Rear Suspension, Removal and Installation).
8. If the front hub face is within specification, install a new brake disc. For
additional information, refer to:
Brake Disc - Vehicles With: Standard Brakes (206-03A Front Disc Brake - V6 3.0L Petrol, Removal and Installation),
Brake Disc - Vehicles With: Standard Brakes (206-03B Front Disc Brake - TDV6 3.0L Diesel /V8 5.0L Petrol/V8 S/C 5.0L Petrol, Removal and
Installation),
Brake Disc - Vehicles With: High Performance Brakes (206-03A Front Disc Brake - V6 3.0L Petrol, Removal and Installation),
Brake Disc - Vehicles With: High Performance Brakes (206-03B Front Disc Brake - TDV6 3.0L Diesel /V8 5.0L Petrol/V8 S/C 5.0L Petrol, Removal
and Installation).
If the rear hub face is within specification, install a new disc.
9. Install the wheel and tire.
For additional information, refer to: Wheel and Tire (204-04 Wheels and Tires, Removal and Installation).
Page 599 of 3039
7. Position the DTI probe 5 mm from the inner edge of the
disc.
Zero DTI and rotate road wheel one complete
revolution to measure disc runout.
8. NOTE: The disc runout limit is 0.075 mm.
If the disc runout exceeds the limit check the hub drive flange and
bearing runout.
For additional information, refer to: Front Wheel Bearing and Wheel Hub Runout Check - Vehicles With: High Performance Brakes (204-00 Suspension System - General Information, General Procedures).
9. If hub runout is within the limit replace the brake disc.
10. Install the wheel.
Tighten the road wheel nuts in sequence as shown
above to the following:
Stage 1: 4 Nm.
Stage 2: 60 Nm.
Stage 3: 125 Nm.
11. Re-check the disc runout as detailed above.
Page 603 of 3039
7. Position the DTI probe in the centre of the disc.
Zero DTI and rotate road wheel one complete
revolution to measure disc runout.
8. Position the DTI probe 5 mm from the inner edge of the
disc.
Zero DTI and rotate road wheel one complete
revolution to measure disc runout.
9. NOTE: The disc runout limit is 0.09 mm.
If the disc runout exceeds the limit check the hub drive flange and
bearing runout.
For additional information, refer to: Rear Wheel Bearing and Wheel Hub Runout Check - Vehicles With: High Performance Brakes (204-00 Suspension System - General Information, General Procedures).
10. If hub runout is within the limit replace the brake disc.
Page 607 of 3039
1 Brake pad wear sensor 2 Caliper body 3 Anti-rattle spring 4 Piston (2 off) 5 Piston seal (2 off) 6 Piston dust cover (2 off) 7 Inboard brake pad 8 Outboard brake pad 9 Retaining washer (2 off) 10 Brake disc 11 Rivet (2 off) 12 Heat shield 13 Front wheel knuckle/hub and bearing assembly 14 Caliper bolt (2 off) 15 Caliper carrier 16 Guide pin dust cover (2 off) 17 Guide pin bush (2 off) 18 Guide pin (2 off) 19 Bleed screw 20 Bleed screw dust cap
Page 608 of 3039
Published:
11-May-2011
Front Disc Brake - TDV6 3.0L Diesel /V8 5.0L Petrol/V8 S/C 5.0L Petrol -
F
ront Disc Brake - Overview
Description and Operation
OVERVIEW
Performance Brakes - 5.0L Supercharger V8 Vehicles
The performance front braking system features ventilated brake discs with dual piston sliding calipers. The discs are 380 mm
(14.96 in.) diameter x 36 mm (1.42 in.) thick.
The brake disc is manufactured from cast iron. The disc is retained on the wheel hub by two retaining washers and the wheel
nuts.
A brake pads wear sensors is fitted to the LH front brake.
Page 629 of 3039
1 Retaining washer (2 off) 2 Brake disc 3 Rivet (3 off) 4 Brake dust shield 5 Rear wheel knuckle/hub and bearing assembly 6 Caliper carrier bolt (2 off) 7 Brake pad wear sensor 8 Guide pin dust cover (2 off) 9 Guide pin bush (2 off) 10 Guide pin (2 off) 11 Caliper carrier 12 Brake caliper housing 13 Piston 14 Piston dust cover 15 Inboard brake pad and shim 16 Outboard brake pad 17 Anti-rattle spring 18 Bleed screw 19 Bleed screw dust cap 20 Knurled pin 21 Parking brake lever 22 Parking brake return spring
Page 697 of 3039
DSC becomes active whenever the engine is running. A momentary press of the switch allows the driver to toggle between the
standard DSC settings and the optimized 'Trac DSC' settings. The message 'Trac DSC' or 'DSC on' will temporarily be displayed
in the instrument cluster message center. The amber DSC warning indicator in the instrument cluster remains illuminated while
'Trac DSC' is selected.
The DSC can be switched off by pressing and holding the switch for more than 10 seconds.
In each case the message 'DSC OFF' will be displayed in the instrument cluster message center to confirm DSC has been
switched off. The amber DSC warning indicator in the instrument cluster will remain illuminated. The system can be switched
back on again by simply pressing and releasing the switch. The message 'DSC ON' will then temporarily appear in the
instrument cluster message center to confirm the system is on.
NOTE: Switch requests may be delayed if the switch is pressed while a DSC operation is taking place. The switch request
will be displayed in the instrument cluster but the ABS module will not initiate any stability changes until it is safe to do so.
If a fault is detected with the DSC switch, the ABS module defaults to the 'DSC ON' setting and any switch requests are ignored.
WARNING: It is recommended that when using snow chains, Trac DSC is switched off and JaguarDrive control winter mode
is selected.
Wheel Speed Sensors
Item Description 1 Front wheel speed sensor 2 Rear wheel speed sensor An active wheel speed sensor is installed in each wheel hub to provide the ABS module with a rotational speed signal from each road wheel. The head of each front wheel speed sensor is positioned close to a magnetic encoder ring incorporated into
the inboard seal of the wheel bearing. The head of each rear wheel speed sensor is positioned close to a magnetic encoder
ring incorporated into the rear wheel bearing assembly. Each encoder ring contains 46 north and south poles. A fly lead
connects each sensor to the vehicle harness.
The wheel speed sensors each have a signal and a return connection with the ABS module. When the ignition is ON the ABS module supplies a signal feed to the wheel speed sensors and monitors the return signals. Any rotation of the road wheels
induces current fluctuations in the return signals, which are converted into individual wheel speeds and overall vehicle speed
by the ABS module. The ABS module broadcasts the individual wheel speeds and the vehicle speed on the high speed CAN bus for use by other
Page 1188 of 3039
Symptom Possible Causes Action Purge valve
Difficult hot start
Injector leak
Electronic engine control
Purge valve
Fuel pump
Ignition system
EGR valve stuck open Check for injector leak, install new injector as required.
Check for electronic engine controls, evaporative emissions,
fuel system, ignition system and engine emission system
related DTCs and refer to the relevant DTC Index Difficult to start after hot
soak (vehicle standing,
engine off, after engine has
reached operating
temperature)
Injector leak
Electronic engine control
Purge valve
Fuel pump
Ignition system
EGR valve stuck open Check for injector leak, install new injector as required.
Check for electronic engine controls, evaporative emissions,
fuel system, ignition system and engine emission system
related DTCs and refer to the relevant DTC Index Engine stalls soon after start
Breather system
disconnected/restricted
ECM relay
Electronic engine control
Ignition system
Air intake system restricted
Air leakage
Fuel lines Ensure the engine breather system is free from restriction
and is correctly installed. Check for electronic engine
control, ignition system and fuel system related DTCs and
refer to the relevant DTC Index. Check for blockage in air
filter element and air intake system. Check for air leakage
in air intake system Engine hesitates/poor
acceleration
Fuel pressure, fuel pump,
fuel lines
Injector leak
Air leakage
Electronic engine control
Throttle motor
Restricted accelerator pedal
travel (carpet, etc)
Ignition system
EGR valve stuck open
Transmission malfunction Check for fuel system related DTCs and refer to the
relevant DTC Index. Check for injector leak, install new
injector as required. Check for air leakage in air intake
system. Ensure accelerator pedal is free from restriction.
Check for electronic engine controls, ignition, engine
emission system and transmission related DTCs and refer
to the relevant DTC Index Engine backfires
Fuel pump/lines
Air leakage
Electronic engine controls
Ignition system
Sticking variable camshaft
timing (VCT) hub Check for fuel system failures. Check for air leakage in
intake air system. Check for electronic engine controls,
ignition system and VCT system related DTCs and refer to
the relevant DTC Index Engine surges
Fuel pump/lines
Electronic engine controls
Throttle motor
Ignition system Check for fuel system failures. Check for electronic engine
controls, throttle system and ignition system related DTCs
and refer to the relevant DTC Index Engine detonates/knocks
Fuel pump/lines
Air leakage
Electronic engine controls
Sticking VCT hub Check for fuel system failures. Check for air leakage in
intake air system. Check for electronic engine controls and
VCT system related DTCs and refer to the relevant DTC
Index No throttle response
Electronic engine controls
Throttle motor Check for electronic engine controls and throttle system
related DTCs and refer to the relevant DTC Index Poor throttle response
Breather system
disconnected/restricted
Electronic engine control
Transmission malfunction
Traction control event Air
leakage Ensure the engine breather system is free from restriction
and is correctly installed. Check for electronic engine
controls, transmission and traction control related DTCs and
refer to the related DTC Index. Check for air leakage in
intake air system DTC Index
For a list of Diagnostic Trouble Codes (DTCs) that could be logged in the Engine Control Module (ECM), please refer to Section
303-14.
REFER to: Electronic Engine Controls (303-14C Electronic Engine Controls - V8 5.0L Petrol, Diagnosis and Testing) / Electronic Engine Controls (303-14D Electronic Engine Controls - V8 S/C 5.0L Petrol, Diagnosis and Testing).
