Brake Sys
tem - General Informatio
n - Brake System BleedingVehicles
With: Standard Brakes
Gen e
ral Procedures
WARNING: WASH HANDS AFTER HANDLING BRAKE FLUID. IF BRAKE FLUID COMES INTO CONTACT WITH THE EYES,
FLUSH EYES WITH COLD RUNNING WATER. IF IRRITATION PERSISTS SEEK MEDICAL ATTENTION. IF BRAKE FLUID IS
TAKEN INTERNALLY, DRINK WATER AND INDUCE VO MITING. GET MEDICAL ATTENTION IMMEDIATELY.
CAUTION: Remove brake fluid spillage imme diately from paint work with clean water.
1. Position vehi cl
e on a four-post lift.
2. Open engine compartment and fit paint work protection covers
to fenders.
3. NO
TE: Make sure the
brake-fluid level does not fall below the
fluid reservoir 'MIN' (minimum) mark when bleeding the brake
system.
Fill fluid reservoir to the 'MAX' (maximum) mark.
4. Prepare l e
ft-hand front, br
ake-caliper for bleeding.
Remove du
st cap.
Connect b
l
eed pipe
and fluid container to bleed nipple.
5. Bleed the brake.
1. Apply pressure to brake pedal
2. Open bleed nipple.
3. Fully depres s brake pedal.
4. Close bleed nipple.
5. Release brake pedal.
6. Wait two seconds to allow system to prime.
7. Repeat procedure until air- free brake fluid is expelled
from the caliper.
6. Tighten bleed nipple, see torque settings below.
Front Disc Brake -
Lubri
cants, Fluids, Sealants and Adhesives
Torques - Brembo Brakes
Torques
Brake Tube, Hoses and Bracket Torques
CAUTI
ON: Replacement of
nuts and bolts: Various thread-locking devices are used on nuts and bolts throughout the
vehicle. These devices restrict the number of times a nut or bolt can be used. See section 100-00 for information.
UnitS
pecification
Brake flu
id
ITT Supe
r Dot 4
Com
ponent
Nm
B
olt - anchor bracket to vertical link
18
0
Bo
lt - caliper to anchor bracket
DO
NOT REMOVE
Bleed n
ipple
12
-16
Hose u
nion to caliper
22
-26
Com
ponent
Nm
Bol
t - caliper carrier to vertical link
14
0
Guide
Pin - caliper housing to caliper carrier
25
-30
Com
ponent
Nm
Bleed n
ipple - front
4-
6
Bleed n
ipple - rear
8-1
1
Hose to fr
ont caliper
10
-14
Hose union to rear cal
iper - union bolt
30
-40
M1
0 hose locknut
15
-20
M10
brake tube female-nut
13
-17
M10
brake tube male-nut
13
-17
M12
brake tube male-nut
15
-20
M18
brake tube male-nut
22
-28
Brake tube clip retention
-bracket to body
4-
6
Rear Disc Brake -
Lubric
ants, Fluids, Sealants and Adhesives
CAUTI
O
N: Do not use brake fluid ITT Supe
r Dot 4 on 2006my vehicles onwards. Fa ilure to follow this instruction may
result in damage to the vehicle.
• NOTE: Brake fluid ITT Super Dot 4 has now been superseded by Shell ESL Super Dot 4 which is the Jaguar recommended
brake fluid. Shell ESL Super Dot 4 can be used on all model years.
Torques
- Brembo Brakes
Torques
Brake Tube, Hoses and Bracket Torques
CAUTIO
N: Replacement of
nuts and bolts: Various thread-locking devices are used on nuts and bolts throughout the
vehicle. These devices restrict the number of times a nut or bolt can be used. See section 100-00 for information.
UnitS p
ecification
Brake flu
i
d
ITT Supe
r Dot 4
Brake flui
d
Shell E
SL Supe
r Dot 4
Brem
bo Brake G
rease
Mol
i
kote Cu 7439
Com
p
onent
Nm
Bol
t
- anchor bracket to hub carrier
60
B
o
lt - caliper to anchor bracket
DO
N
OT REMOVE
Bleed n
i
pple
12
-16
Un
ion bolt - brake hose to caliper
22
-26
Com p
onent
Nm
Bol
t
- caliper carrier to hub carrier
60
Guide
Pi
n - caliper housing to caliper carrier
25
-30
Comp
onent
Nm
Bleed ni
pple - front
4-6
Bleed ni
pple - rear
8-11
Hose union to rear cal
i
per - union bolt
30
-40
Hose to fr ont cal
iper
10
-14
M1 0 h
ose locknut
15
-20
M10 brake
tube female-nut
13
-17
M10 brake
tube male-nut
13
-17
M12 brake
tube male-nut
15
-20
M18 bu
lkhead brake tube connector
22
-28
Brake tube clip retention -
bracket to body
4-
6
Hydraulic B
rake Actuation -
Lubri
cants, Fluids, Sealants and Adhesives
Torques
Torques - Brembo Brakes
Brake Tube, Hoses and Bracket Torques
CAUTI
ON: Replacement of
nuts and bolts: Various thread-locking devices are used on nuts and bolts throughout the
vehicle. These devices restrict the number of times a nut or bolt can be used. See section 100-00 for information.
UnitS
pecification
Brake flu
id
ITT Supe
r Dot 4
Com
ponent
Nm
N
ut - master cylinder to brake booster
21
-29
Nu
t - brake pedal pivot-pin to pedal housing
17
-23
Nu
t - brake switch to pedal housing
3
Nu
t - pedal housing to body
15
-20
Nu
t - brake booster to pedal housing
22
-28
Com
ponent
Nm
Bleed n
ipple
12
-16
U
nion bolt - brake hose to caliper
22
-26
Com
ponent
Nm
Bleed n
ipple - front
4-
6
Bleed n
ipple - rear
8-1
1
Hose to fr
ont caliper
10
-14
U
nion to rear caliper - union bolt
30
-40
M1
0 hose locknut
15
-20
M10
brake tube female-nut
13
-17
M10
brake tube male-nut
13
-17
M12
brake tube male-nut
15
-20
M18
brake tube male-nut
22
-28
Brake tube clip retention
-bracket to body
4-
6
Install peda
l housing to vehicle.
Make sure ped
al housing apertu
re is positioned correctly.
Inst
all and tighten nuts to 15-20 Nm.
3. Position cloth underneath master cylinder to collect brake fluid
spillage.
4. Inst
all brake tubes to master cylinder.
Re
move plugs.
Connect
and tighten brake tubes. Refer to Specification
section 206-06 for torque setting.
R
emove cloth from underneath master cylinder.
5. Con
nect throttle cabl
e to pedal housing.
Inst
all cable to grommet.
Inst
all cable to
pedal housing.
6. Conne
ct throttle inner ca
ble to pedal grommet.
7. Connect vacuum pipe elbow to brake booster.
1. Install new seal.
2. Connect pipe.
Power Brake Actuation -
Lubri
cants, Fluids, Sealants and Adhesives
Brake Ratio
Torques
CAUTI
ON: Replacement of
nuts and bolts: Various thread-locking devices are used on nuts and bolts throughout the
vehicle. These devices restrict the number of times a nut or bolt can be used. See section 100-00 for information.
B
rake Tube, Hoses and Bracket Torques
CAUTI
ON: Replacement of
nuts and bolts: Various thread-locking devices are used on nuts and bolts throughout the
vehicle. These devices restrict the number of times a nut or bolt can be used. See section 100-00 for information.
UnitS
pecification
Brake flu
id
ITT Supe
r Dot 4
Fr
ont Brakes
6
5 per cent
Rear B
rakes
3
5 per cent
Com
ponent
Nm
N
ut - master cylinder to brake booster
21
-29
Nu
t - brake pedal pivot-pin to pedal housing
17
-23
Nu
t - brake switch to pedal housing
3
Nu
t - pedal housing to body
15
-20
Nu
t - brake booster to pedal housing
22
-28
Com
ponent
Nm
Bleed n
ipple - front
4-
6
Bleed n
ipple - rear
8-
11
Hose to fr
ont caliper
10
-14
Hose banjo to rear caliper -
bolt
30
-40
M1
0 hose locknut
15
-20
M10
brake tube female-nut
13
-17
M10
brake tube male-nut
13
-17
M12
brake tube male-nut
15
-20
Bolt -
3-way tube connector to body
9-
12
Anti-Lock Control -
Lubri
cants, Fluids, Sealants and Adhesives
Torques
Brake Tube, Hoses and Bracket Torques
CAUTI
ON: Replacement of
nuts and bolts: Various thread-locking devices are used on nuts and bolts throughout the
vehicle. These devices restrict the number of times a nut or bolt can be used. See section 100-00 for information.
UnitS
pecification
Brake flu
id
ITT Supe
r Dot 4
Com
ponent
Nm
Bol
t - front wheel speed sensor
8-
10
Bolt
- rear wheel speed sensor
8-
10
Bo
lt - hydraulic control unit to bracket
8-
10
Bolt -
hydraulic control unit bracket to body
10
-14
Hub rotor nut2
70-330
Com
ponent
Nm
Bleed n
ipple - front
4-
6
Bleed n
ipple - rear
8-1
1
Hose to fr
ont caliper
10
-14
Hose banjo to rear caliper -
bolt
30
-40
M1
0 hose locknut
15
-20
M10
brake tube female-nut
13
-17
M10
brake tube male-nut
13
-17
M12
brake tube male-nut
15
-20
M18
brake tube male-nut
22
-28
Brake tube clip retention
-bracket to body
4-
6
It is a reciprocating two
-circuit pu
mp in which one brake circuit is as signed to each pump circuit.
It supplies th
e fluid pressure and vo
lume to supply the brake circuits under ABS and Traction control.
The pump is driven by an electri
c motor, with the pump
housing incorporating two lo w pressure accumulators and
damping chambers for each brake circuit.
The ac cu
mulator stores the pressure and smooths out the output pu
lses from the pump.
ABS Warning Lamp
The sys
tem will be set in a fail-safe mode if a problem is de
tected; a warning lamp on the instrument panel will notify the
driver there is a problem.
Anti-Lock Braking Sy
stem (ABS)
The AB
S components are combined with
an hydraulic booster and a tandem master cylinder to provide a two circuit braking
system. The system comprises, four wheel speed sensor s, a brake control modulator and an ABS warning lamp.
Should a wheel start to lock-up during braking a signal tr ansmitted from the wheel speed sensor to the brake control
modulator will start the hydraulic pump. The brake control modula tor will close the input valve of the line connected to the
locked-wheel to stop any increase in fluid pressure to the br ake caliper. If this fails to prevent the wheel locking, the
pressure in the caliper will be decreased by opening the return valve until th e wheel starts accelerating again. The fluid
pressure from the return va lve is directed into the low pressure accumulator, housed in the pump.
From the low pressure accumulator, fl uid is pumped through the damping cham ber to the brake master cylinder. The
pressure to the brake caliper will then be increased in small steps to maintain maximum adhesion between the tire and road
surface. This is achieved by closing the return valve, and opening the input valve and using the hydraulic pump to increase
the pressure.
Although the system senses all four wheels independently, the rear wheels are regulated as a pair. If a sensor on a rear
wheel detects a wheel decelerating rapidly, then the fluid pressure to both wheels is reduced. The fluid pressure is then
dictated by the wheel having the lowe st adhesion with the road surface.
The ABS system will be set in a fail-safe mode if a problem is detected; a warn ing lamp on the instrument panel will notify
the driver there is a problem. The brake system will still operate conventionally and with the same standard of performance
as a vehicle not equipped with ABS.
Automa tic Stability Control (ASC)
Th
e ASC utilizes the ABS sensing arrangement to provide the maximum traction force to propel the vehicle.
The ASC is switched on when the engine is started. The system can be switched off by pressing the 'ASC OFF' (the switched
is marked 'TRAC OFF' on vehicles fitted with traction control). The switch, which is situated in the center console switchpack,
lights up to warn that the system is sw itched off. An 'ASC' amber warning light flashes on the instrument panel when the
system detects a spinning wheel.
The ASC system uses engine intervention to reduce the torque delivered to the drive wheels to prevent them spinning.
Engine torque is re duced in three ways:
The
throttle is moved towards the closed position.
The ignition is retarded. F
u
el is cut-off at the cylinder injectors.
Wheel spin is detected by the wheel sp eed sensors and communicated to the AB S/TCCM. The ABS/TCCM uses information
from the controller area network (CAN) to calculate the torque that the engine should produce to stop the wheel spinning.
Torque reductions are then requested from the engine control module (ECM ) through the CAN. The throttle is then
positioned to provide the target torque, which has been calculated to prevent wheel spin. During the transient phase of
torque reduction the fuel is cut-off and th e ignition retarded Both the fuel cut-off an d ignition retard will be restored to
normal when the throttle is set to its new position.
The ASC uses a brake control modulator with six solenoid va lves: three normally open inlet valves and three normally