power steering JAGUAR X308 1998 2.G Workshop Manual
[x] Cancel search | Manufacturer: JAGUAR, Model Year: 1998, Model line: X308, Model: JAGUAR X308 1998 2.GPages: 2490, PDF Size: 69.81 MB
Page 7 of 2490
206‐07: Powe r Brake Actuation
Specif
ication
Description and Operation
Brake Booster
Removal and Installation
Brake Booster (70.50.17)
Brake Booster and Brake Master Cylinder (70.50.18)
206‐09: Anti ‐Lock Control
Specification
Description and Operation
Anti‐Lock Control
Diagnosis and Testing
Anti‐Lock Control
Removal and Installation
Anti‐Lock Brake System (ABS) Module (70.60.02)
Front Wheel Speed Sensor (70.60.03)
Hydraulic Cont
rol Unit (HCU)
Rear Wheel Speed Sensor (70.60.04)
Wheel Speed Sensor Ring (70.60.25)
211: Steering System
211‐00: Steering System ‐ General Information
Specification
Description and Operation
Steering System
Diagnosis and Testing
Steering Sy
stem
General Procedures
Power Steering System Filling and Bleeding
Power Steering System Flushing (57.15.08)
Power Steering System Vacuum Filling and Bleeding
Steering Gear Centralizing
Page 8 of 2490
211‐02: Powe r Steering
Specif
ication
Description and Operation
Power Steering
Diagnosis and Testing
Power Steering
Removal and Installation
Steering Gear (57.10.01)
Steering Gear Bushing (57.10.30)
211‐03: Steering Linkage
Specification
Description and Operation
Steering Linkage
211‐04: Steering Column
Specification
Description and Operati
on
Steering Column
Removal and Installation
Steering Column Lower Shaft (57.40.05)
211‐05: Steering Column Switches
Specification
Description and Operation
Steering Column Switches
Removal and Installation
Steering Column Multifunction Switch (86.65.92)
3: Powertrain
303: Engine
303‐00: Engine System ‐ General Information
Page 46 of 2490
Meter (measurement)m
Me
tric (screw thread, e.g.
M8)
M
MicrofaradMFDUni t
of electrical capacitance, one millionth of a farad
Mi
ll
imeter
mm
Mi
ll
imeter of mercury
mm
Hg
Mill
isecond
ms
Min
i
mum
mi
n.
Min u
te
minut
e
Model YearMY
ModuleMSelf
contained group of electrical/electronic components which is designed as
a single replaceable unit
Modulating signalMDA sh
ift process signal to the TCM on SC vehicles
Motorized In
-Car
AspiratorMIAD e
vice which constantly samples cabi
n temperature by passing air over a
sensor, and communicates with the A/ CCM to modify A/C system performance
to suit
Mult i Prot
ocol Adaptor
MPAAn i
n
terpreter for the various data
languages present on a vehicle
N
Nati
onal Institute of
Occupational Safety and
Health (US)
NIO S
H
Ne
wto
n
NSI unit of force. 1
N = 0.224
8 pounds force
Ne
wto
n meter
NmSI unit of torque. Must not be
co
nfused with nm (nanometer)
Ni
tr
ous Oxide
NO
xCompounds of nit rogen and oxygen fo rmed at high temperatures. Major
sourc
e of exhaust-gas air pollution
No
n
-Volatile Random
Access Memory
NVR A
M
R
A
M which retains memory even
if power supply is interrupted
Normal
ly aspirated
F
u
eling system using intake air at atmo
spheric pressure; not supercharged or
turbocharged
N ormal
ly Closed
NC
N
o
rmally Open
NO
No
r
th American
Specification
NASVehicles f or sal
e in the USA and Canadian markets
Nu
mbe
r
No
.
O
Oc
cupational Safety and
Health Administration
(US)
OS H
A
O
n
-Board Diagnostic
OB
DA system that moni
tors some or all co
mputer input and output control signals.
Signal(s) outside the pre-de termined limits imply a fault in the system or a
related system
O n
-Board Refueling
Vapor Recovery
OR V
R
O
riginal
Equipment
Manufacturer
OE M
Outp
ut
O/
PAn electrical o u
tput signal from a controlling device
Ou
ts
ide diameter
o.
d
ia
O
xides of
nitrogen
NO
x
Oxygen senso
r
O2
SA s
ensor which detects oxygen content in the exhaust gases
P
Parameter Identifi
erPIDAn in
dex number referring to a parame
ter within a module without knowledge
of its storage location
Park N e
utral Position
PN
P
Park N e
utral Position
Switch
PN PSIndic
ates the selected non-drive modes of the (automatic) transmission
Part numberpart no.
Portable Diag
nostic Un
it
PD
UCompre hen
sive electrical diagnosis system specific to Jaguar vehicles
Posi
ti
on
po
s'n
Power As si
sted Steering
PASHydraul
i
c pump-assisted steering system
Power Steer
i
ng Pressure
PSP
Programmable Elect
r
onic
Control Units System
PECU SProcess whereb y
a common ECM is progra
mmed on the production line to suit
the market requirements of a particular vehicle
Programmable Read-O
nly
PROMRO
M with some provision for setting
the stored data after manufacture
Page 67 of 2490
Front Suspension -
Lubri
cants, Fluids, Sealants and Adhesives
Press-In Loads
Torques
UnitS
pecification
Loctite27
0
Greas
e
Shell Retin
ax 'A'
Greas
e
Castro
l 'NTR'
Com
ponent
Kn
Ball join
t to upper wishbone
25
- 50
B
all joint to lower wishbone
25
- 50
Com
ponent
Nm
N
ut - ball joint, upper wishbone to vertical link.
60
-80
N
ut - ball joint, lower wishbone to vertical link.
60
-80
Nu
t - fulcrum bolt, upper wishbone.
60
-80
N
ut - ball joint, tie rod to steering arm.
71
-85
Bol
t - wheel speed sensor to vertical link.
8-1
0
Bol
t - front mounting to crossbeam.
22
-28
Bolt
- mounting , stabilizer bar.
30
-40
N
ut - link arm ball joint to stabilizer bar.
60
-80
Bolt
- mounting, steering rack to crossbeam.
41
-54
B
olt - front mounting, crossbeam to body.
22
-28
Bol
t - spring pan to lower wishbone.
70
-90
N
ut - shock absorber to upper mounting
(vehicles with adaptive damping).
16
-18
Nu
t - shock absorber to upper mounting (vehicles without adaptive damping).
30
-40
N
ut - shock absorber lower to wishbone.
43
-57
B
olt - engine Hydramount to crossbeam.
34
-46
B
olt - crossbeam rear mounting to body.
13
1-185
Bol
t - generator cooling du
ct deflector to crossbeam.
17
-23
N
ut - lower steering column to pinion shaft.
22
-28
N
ut - hub, speed sensor rotor.
27
0-330
B
olt - shield, brake disc.
9-1
2
Bol
t - lower wishbone, front arm to rear arm.
77
-103
Nu
t - stabilizer bar link arm to wishbone bracket.
41
-54
N
ut - wishbone front
eccentric bolt.
11
3-153
Nu
t - wishbone rear
eccentric bolt.
11
3-153
N
ut - fulcrum shaft, upper wishbone.
60
-80
Bolt -
power steering pi
pes to pinion housing.
9-1
2
Page 69 of 2490
Front C
rossbeam
A
fully stressed, pressed steel and tube fa
brication with integral lower wishbone tie bars, the crossbeam is secured to the
body on four resilient mountings.
The crossbeam incorporates mounting points for:
The u
pper and lower wish
bone fulcrum bolts.
The
stabilizer bar
The power steering rack. The engine h
ydramounts.
R
oad springs.
Slots and cam reaction pl ates on the crossbeam provide for ad justment of suspension geometry.
It
em
Par
t Number
De
scription
1—Cro
ssbeam
2—Upper
Wishbone
3—Lower Wi
shbone Arm, Front
4—Lower Wi
shbone Arm, Rear
5—Upper
Wishbone Ball Joint
6—Lower Wi
shbone Ball Joint
7—Ful
crum Bolt
8—Adjuster B
olt, Front
9—Adjuster B
olt, Rear
10—S
pring Pan
11—Shock Absorber Lower M
ounting Plate
12—Vertical Link
13—Hub Assembly
14—Sensor R
otor
15—B
olt, Wishbone to Link Arm
Page 309 of 2490
Brake System - General Inform
ation - Brake System
D
iagnosis and Testing
Principles of Operations
The brake system operates by transferring effort applied to th e brake pedal, by the driver to the brakes at each wheel.
The braking effort is distributed to each wheel, using a hydraulic system. The system is assisted using a vacuum brake
booster that reduces pedal effort for a given hydraulic pressure. The parking brake operates on the rear wheels and is
applied using a hand operated control.
I
nspection and Verification
•
NOTE: Prior to carrying out any diagno
sis, make sure that the brake system warning indicator is functional.
Visually examine the front and rear tire and wheel assemblies for damage such as un even wear patterns, tread worn out or
sidewall damage. Verify the tires are th e same size, type and, where possible, same manufacture. Replace the damaged
wheel or excessively worn tire. For a dditional information, refer toSection 204
-0
4 Wheels and Tires
.
W
heels and tires must be cleared of an
y foreign matter and tire pressures ad justed to the correct specification.
If the tires exhibit uneven wear or feathering, the cause must be corrected. Check the steering and suspension components
for damage or wear and, if ne cessary, check and adjust front wheel alignment. For additional information, refer toSection
204
-00 Suspen
sion System
- General Informati
on
.
Road Test
V
isual Inspection Chart
Carr
y out a road test to compare actual vehicle braking performance with the
performance standards expected by the
driver. The ability of the test driver to make valid compar isons and detect performance deficiencies will depend on
experience.
The driver should have a thorough knowledge of brake system operation and accepted general performance guidelines to
make good comparisons and de tect performance concerns.
An experienced brake technician will always establish a route that will be used for all br ake diagnosis road tests. The roads
selected will be reasonably smooth and level. Gravel or bump y roads are not suitable because the surface does not allow the
tires to grip the road equally. Crowned roads should be avoide d because of the large amount of weight shifted to the low set
of wheels on this type of road. Once th e route is established and consistently used, the road surface variable can be
eliminated from the test results.
Before a road test, obtain a complete description of the customer concerns or suspec ted condition. From the description, the
technician's experience will allow the te chnician to match possible causes with symptoms. Certain components will be
tagged as possible suspects while others wi ll be eliminated by the evidence. More importantly, the customer description can
reveal unsafe conditions which should be ch ecked or corrected before the road test. The description will also help form the
basic approach to the road test by narrowing the concern to specific components, vehicle speed or conditions.
Begin the road test with a general brake performance check. Keeping the description of the concern in mind, test the brakes
at different vehicle speeds using both ligh t and heavy pedal pressure. To determine if the concern is in the front or rear
braking system, use the brake pe dal and then use the parking brake control. If the condition (pull, vibration, pulsation)
MechanicalElectrical
Brake m
aster cylinder
Parkin
g brake switch
Brake ca
liper piston(s)
D
amaged or corroded wiring harness
Brake di
scs
B
rake master cylinder fluid level switch
Wh
eel bearin
gs
Brake pads
Power brake booster
Brake ped
al linkage
Boost
er vacuum hose
Tire
s
De
bris
Page 311 of 2490
P
INPOINT TEST A : BRAKES NOISY
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
A1
: INSPECT BRAKE PADS
Inspect the condi
tion of the front and rear brake
pads. Check for damage to any anti-squeal shims.
1
Are th
e brake pads OK?
Yes GO to A2
.
No
CLEAN the front brake pads or INSTALL new front brak e pads if necessary. For additional information,
refer toSection 206
-03
Front Disc Brake
. CLEA
N the rear brake pads or INSTALL new rear brake pads
if necessary. For additional information, refer toSection 206
-0
4 Rear Disc Brake
.
Test vehicle for
presence of brake squeal.
A2
: INSPECT BRAKE DISCS
Inspe
ct the brake discs for excessive corrosi
on, wear or disc thickness variation.
1
D
oes excessive corrosion, wear or
disc thickness variation exist?
REFER to Specification
- in t
his section.
Yes INSTALL new front brake discs and brake pads. For additional information, refer toSection 206
-03
Fr
ont Disc Brake
. INSTALL n
ew rear brake discs and brake
pads. For additional information, refer
toSection 206
-0
4 Rear Disc Brake
. TEST
the system for normal operation.
No Vehicle is OK.
P
INPOINT TEST B : VIBRATIO
N WHEN BRAKES ARE APPLIED
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
B1
: ROAD TEST VEHICLE
R
oad test the vehicle between 40-80 km/h (25-50 mph) without applying brakes.
1
Is th
e vibration present?
Yes TEST for noise vibration and harshness. REPEAT road test if necessary.
No GO to B2
. .
B2
: CHECK FOR BRAKE VIBRATION
R
oad test the vehicle between 40-80 km/h (25-50
mph) with light and medium application on the
brake pedal.
1
Is a vibration
present?
Yes If the vibration is from the front of the vehicle GO to B3
. If
the vibration is
from the rear of the
vehicle or can not be di agnosed between front or rear of the vehicle GO to B6
.
No
Vehicle is OK.
B3: CHECK
THE SUSPENSION
AND STEERING COMPONENTS
Chec
k the condition of the front susp
ension bushes and ball joints
REFER to Section 204
-01
Front Suspension
.
Chec
k the condition of the steering linkage components
REFER to Section 211
-0
2 Power Steering
/
211
-0
3 Steering Linkage
.
1
D
o any of the front suspension components or steering comp
onents require replacement?
Yes INSTALL new components as necessary
REFER to Section 204
-01
Front Suspension
/
211
-0
2 Power Steering
/
211
-0
3 Steering Linkage
.
R
oad test the vehicle between 40-80 km/h (25-50
mph) with light and medium application on the
brake pedal. If vibr ation still exists GO to B4
.
No
GO to B4
.
B4: CHECK
THE FRONT BRAKE PA
DS AND FRONT BRAKE DISCS
Chec
k the condition of the front br
ake pads and front brake discs.
1
D
oes excessive brake disc runout or br
ake disc thickness variation exist?
Page 453 of 2490
Stee
ring System - General Information -
S
teering Linkage Specifications
Power Steering Pump Specifications
Lubricants, Fluids, Sealers and Adhesives
S
teering Linkage Free Play
Meas
urement (mm)
Meas
urement (in)
F
ree play (measured at
the steering wheel rim)
0-
6
0
-0.24
It
em
S
pecification
Power steeri
ng pump relief pressure
10
6-114 bar
It
em
S
pecification
Power steeri
ng fluid
De
xtron 3
Page 455 of 2490
Steering System - General Inform
ation - Steering System
D
iagnosis and Testing
I
nspection and Verification
1.
1. Verify t
he customer concern by driving the vehicle.
2. 2. Visually inspect for obvious signs of mechanical or electrical damage.
Mec
hanical Inspection Chart
Electrical Inspection Chart
Mechanical Checks
Incorrect
tire pressure, loose whee
l nuts, incorrect wheel alignment
Loose ti
e-rods
Loose dam
per and spring assemblies or ball joint
Loose s
teering column shaft universal joints
Loose pinc
h bolts on steering column shaft
Loose steeri
ng gear assembly
Check f
or external damage to the steering gear.
- Damaged tie-rods
-
CAUTION: If a steering gear assemb ly is returned under warranty with leaking seals, but there is also
damage to the steering gear boot/boots the steering gear warranty will be invalid. This is due to the steering
gear seals being damaged due to fore ign materials entering the steering gear boot and damaging the steering
gear seals thereafter.
Damaged steering gear boot
Damaged accessory driv
e belt
Bin
ding or misaligned steering co
lumn, pump or steering gear
Incorrect fluid
level
Hose leaks o
r line restrictions
Hose fou
ling bodywork
El
ectrical Checks/Tests
Make sure all
connectors are in plac
e (steering gear Servotronic solenoid and steering control module (SCM) - if
applicable)
Make su
re all the fuses are in place and not blown
D
ISCONNECT the steering gear transducer
and the steering should become heavy
TEST e
lectrical values:
- Power Supply to the SCM = 12 Volts
- Steering gear transducer resist ance 7.0 to 7.5 Ohms is normal
(
limits: less than 5 Ohms and greater than 9 Ohms would
be declared unacceptable)
- Steeri
ng gear transducer voltage = 6 Volts
- Steering gear transducer cu rrent = 840 mA at 0 mph reducing to 0 mA at maximum speed
Page 456 of 2490
3.3. If an obvi
ous cause for an observed or
reported concern is found, correct th e cause (if possible) before proceeding
to the next step.
4. 4. Check the power steering fluid condit ion. For additional information, REFER to Power Steering Fluid Condition
Check in this section.
5. 5. If the concern is not visually evid ent, verify the symptom and REFER to Steering Fault Diagnosis by Symptom
Charts in this section.
Steering Re
lay Harness Connector
Stee
ring Linkage In
spection and Backlash (Freeplay) Check
CAUTIO
N: Steering gear boots must be
handled carefully to avoid damage. Use new clamps when installing steering
gear boots.
Inspect the boots for cuts, deterioration, tw isting or distortion. Check the steering gear boots to make sure they are tight.
Install new boots or clamps as necessary.
REC O
NNECT all electrical item
s disturbed during testing
Ite
m
De
scr
iption
1Ste
e
rin
g tran
sduc
er
ground
2Igni
ti
on feed
3Steeri
ng transducer feed
4Ground
5Speed s
ensor signal
6Seri
a
l interface