1998 JAGUAR X308 Power steering pump

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

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

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

•
NOTE: The following steps must be carried out with assistance.
1. 1. With the wheels in the straight ahead po sition, gently turn the steering wheel to the left and the right to check for
free play.
2. 2. Free play should be between 0 and 6 mm (0 and 0.24 in) at the steering wheel rim. If the free play exceeds this
limit, either the ball joints are worn, the lower steering column joints are worn or the backlash of the steering gear
is excessive.
CAUTION: DO NOT attempt to adjust the stee ring gear yoke. Failure to follow this instruction will result in the steering
gear warranty to become invalid.
3. 3. The backlash of the steering gear cannot be adjusted, in stall a new steering gear. For additional information,
REFER to Section 211
-0
2 Power Steering
.
4. 4. Grasp the steering wheel
firm
ly and move it up and down and to the left and right without turning the wheel to
check for column bearing wear, steering wheel or steering column. For additional information,
REFER to Section 211
-0
4 Steering Column
.
Power Steering Fluid Condition Check
1.
1. R
un the engine for 2 minutes.
2. 2. Check the power steering fluid system level.
3. 3. Observe the color and the odor. The color under normal circumstances should be dark reddish, not brown or
black.
4. 4. Allow the fluid to drip onto a faci al tissue and examine the stain.
5. 5. If evidence of solid material is foun d, the power steering fluid system should be drained for further inspection.
6. 6. If fluid contamination or steering co mponent failure is confirmed by the se diment in the power steering fluid
system, REFER to Steering Fault Diagnosis by Symptom Charts in this section.
Power Steer
ing Pressure Test
Test Equ
ipment

It
em
S
pecial Tool Number
De
scription
12

11-011
Pres
sure Gauge Hose
221

1-011-08
Pump Return Hose
321

1-011-07
Pump Return Hose Connector
42

11-011-03/2
Test Equ
ipment to High
Pressure Hose Adaptor

The
measurement of the maximum system pressure, (which is
governed by the pressure relief valve) is achieved by
inserting the Service Tool (pressure gauge and adaptors) into th e fluid circuit of the power steering system. Run the engine
at idle speed, turn the st eering from lock to lock and read the ma ximum pressure recorded on the gauge.
Installin
g Test Equipment
To
in
stall the pressure test equipment:
Pla
c
e a suitable drain tray be
low the power steering pump.
Install a hose clamp on
the re
servoir to pump hose prior to disconnecting any hoses, to avoid unnecessary loss of
fluid.
Disc
onnect the hose from the power st
eering pump high pressure outlet.
Install the pu
mp outlet to hose adaptor (5
). Do not omit the 'O' ring seal (9).
Connect the power steering
pump
adaptor to control valve hose (6) of the test equipment.
Install th e adaptor (4) in th
e high
pressure hose previously removed from the power steering pump outlet.
Conn
ect the connector (3) of the test equipment hose (2) to the adaptor (4).
R
e
move the hose clamp fro
m the reservoir hose.
Start th
e engine.
With the control valve (7) OPEN and the engine idli ng, the following system pressures may be checked:
Du
ring turning.
W
h
en the steering is
held on full lock.
With
the steeri
ng at rest.
• CAUTIONS:
To avoid excessive heating of the po wer steering pump, do not close the valve for longer than 5 seconds maximum.
Do not drive the vehicle with the test equipment installed.
With the control valve (7) CLOSED the power steering pump maximum ou tput pressure can be checked.
Removing Test Equipment
To
remove the test equipment:
Install a hose clamp
on
the reservoir to power steering pump hose.
Re
movi
ng the test equipmen
t is a reversal of the in stallation instructions.
Install a new '
O
' ring seal (9) to the power steering pump high pressu
re outlet to hose connection.
Instal
l the original hose to
the power steering pump.
Re
move the clamp from the reservoir to
the power steering pump hose.
Top-up the reservoir flui
d.
Ble
e
d the power steerin
g system. For additional information,
REFER to Power Steering System Bleeding
- in thi
s section.
Stee
ring Fault Diagnosis by Sympt
om Charts
Leakage
52
11-0
11-03/1
Pump High Pressure Ou
tlet
to Hose Adaptor
621
1
-011-02
Pump Adaptor
to Contro
l Valve Hose
721
1
-011-01
Control Valve
82
11-
011
Pressure Gauge
9-'O
'
Ring Seal
Cond
iti
on
Possib
l
e Sources
Acti
o
n
Co
nfirm
the position of the fluid
leak.
CLEAN th
e area of the leak.
In
s
pect the area and confirm the exact position of leak.
Make sure the fluid
is not from anoth
er system on
the vehicle.

Function
al
Fl
uid
leakage
O
verfilled system.
CORRECT the
fluid leve
l as necessary.
Compon
ent leak.
•
NOTE: Record the position of the le
ak and some indication of the rate
of the leak on the Warra nty Return Record Sheet.
LOCATE
the suspect component or CHECK hose connections and
repair as necessary.
Damaged fluid cap. INST
ALL a new fluid cap.
Loose or damaged h

ose
fittings.
TI
GHTEN or INSTALL a new hose as necessary.
Leakage at

power
steering pump.
INST
ALL a new power steering
pump as necessary. For
additional information,
REFER to Section 211
-0
2 Power Steering
.
Fl

uid
leakage
Leakage
at steering hose
to steering gear connection.
CHECK
steering hose to
steering gear conn ection for leakage.
CHECK and TIGHTEN the steeri ng hose to steering gear
connection retaining bolt s/bolts as necessary.
Power steeri
ng fluid
leakage at O-ring seals.
CHECK
the power steering system fo
r signs of steering fluid loss
from O-ring seals.
INST
ALL new O-ring seals as necessary.
BLEE

D the power steering system.
For additional information,
REF
ER to Section 211
-0
0 Steering System
- Ge
neral
Informati

on
.
Power steeri

ng fluid
leakage from transfer pipes.
CHECK
the power steering system fo
r signs of steering fluid loss
from the transfer pipes.
CHECK
and TIGHTEN the transfer pipes if required, INSTALL new

transfer pipes as necessary.
BLEE
D the power steering system.
For additional information,
REF
ER to Section 211
-0
0 Steering System
- Ge
neral
Informati

on
.
Power steeri

ng fluid
leakage from the steering
gear.
CHECK
the power steering gear for signs of fluid loss.
INST

ALL a new steering gear as
necessary. For additional
information,
REFER to Section 211
-0
2 Power Steering
.
Power steeri

ng fluid
leakage from steering gear boot.
CHECK
the power steering gear for signs of fluid loss.
INST

ALL a new steering gear as
necessary. For additional
information,
REFER to Section 211
-0
2 Power Steering
.
Cond

ition
Possib
le Sources
Acti
on
F

ree play at steering wheel

Exce
ss play in the steering

linkage.
CHECK
the steering linkage for excess play.

For additional information, REFER to the
Steering Linkage Inspection and Backlash (Freeplay) Check in this section.
S
teering wheel loose.
CHECK
and TIGHTEN the steering wheel
retaining bolt/bolts as necessary. For additional information,
REFER to Section 211
-0
4 Steering Column
.
Lower steeri

ng column
pinch bolt loose.
CHECK
and TIGHTEN the lower steering
column pinch bolts as necessary. For additional information,
REFER to Section 211
-0
4 Steering Column
.
Exce

ssive wear in lower
steering column.
CHECK
for lower steering column for wear in

the universal joints. If wear is present,
INSTALL a new lower steering column as necessary.
W
ear in suspension joints.
CAU
TION: DO NOT attempt to adjust the
steering gear yoke. Failure to follow this instruction
will result in the steering gear warranty to become
invalid.
CHECK
for excess wear in the front
suspension joints. For additional information,
REFER to Section 204
-00
Suspension
Sy

stem
- General
Information
.

Fo
r additional information, REFER to the
Electrical Checks and Tests in this section.
Steering control
module
(SCM) defective.
CHECK
the SCM and INSTALL a new SCM as

necessary.
Power steeri ng f
luid
delivery pressure or flow too low.
CHECK
the power stee
ring pressure. For
additional information, REFER to the Power Steering Pressure Test in this section.
INSTALL a ne
w power steering pump as
necessary. For additi onal information,
REFER to Section 211
-0 2
Power Steering
.
Internal steering gear
leakage.
CHECK
the power stee
ring pressure. For
additional information, REFER to the Power Steering Pressure Test in this section.
INSTALL a ne
w steering
gear as necessary.
For additional information,
REFER to Section 211
-0 2
Power Steering
.
Steeri
ng operati
on is very
heavy when driving, but when stationary
manoeuvring is good
Steering transducer open earl
y.
CHECK

steering transducer and INSTALL a
new steering transducer as necessary.
Carry out th
e electrical checks and tests.
For additional information, REFER to the
Electrical Checks and Tests in this section.
Steering transducer open
early,
steering control
module (SCM) fault.
CHECK
SCM and INSTALL a new SCM as
necessary.
Steering transducer open
earl
y, speedo signal error.
CHECK
speedo
circui
t. For additional
information, REFER to the wiring diagrams.

Steeri ng operati
on is very
light when driving, but when
stationary manoeuvring is good
Steering transducer not
o
pen, (no power steering
fluid flow).
CHECK
the power steering fluid condition.
For additional information, REFER to the
Power Steering Fluid condition check in this section.
Steering transducer not o
pen, steering control
module (SCM) fault.
CHECK
the SCM and INSTALL a new SCM as

necessary.
Carry out th
e electrical checks and tests.
For additional information, REFER to the
Electrical Checks and Tests in this section.
Steering transducer not
o
pen, speedo signal error.
CHECK

the speedo circ
uit. For additional
information, REFER to the wiring diagrams.

CHECK
the power steering
fluid low pressure pipe for restricted flow.
INSTALL a ne
w power steering fluid low
pressure pipe.
S t
eering heavy operation
during rapid manoeuvring
Ai r i
n power steering
system.
CHECK for an air l
eak into the power
steering system and re pair as necessary.
BLEED the
power steering system. For
additional information,
REFER to Power Steering System Bleeding
- in t hi
s section.
Fluid loss at the power
steering pump shaft seal.
CHECK the power steer
ing pump for signs o
f steering fl
ui
d loss.
INST
ALL a ne
w power steering pump as
necessary. For additi onal information,
REFER to Section 211
-0 2
Power Steering
.
Power steeri
ng f
luid
delivery pressure or flow too low.
CHECK the power steer
ing pump for signs o
f steering fl
ui
d loss.
CHECK

the power stee
ring pressure. For
additional information, REFER to the Power Steering Pressure Test in this section.
INSTALL a ne
w power steering pump as
necessary. For additi onal information,
REFER to Section 211
-02
Power Steering
.
Lower steeri
ng col
umn
interference.
CHECK
the steering co
lumn is free from
interference from the en gine harness, sound
proofing or the floor covering.
Incorrect steering geometry. CHE
CK the front wheel alignment. For
additional information,
REFER to Section 204
-00 Sus
pension
Sy
ste
m
- General

Information
.
CHECK

the power stee
ring pressure. For

No
ise
S
teering heavy operation in
one direction
F
aulty rotary valve/seal.
addi
tional information, REFER to the Power
Steering Pressure Test in this section.
INST
ALL a new steering
gear as necessary.
For additional information,
REFER to Section 211
-0
2 Power Steering
.
Ti

re fouling on the wheel
arch liner.
CHECK for
clearance be
tween the tire and
the wheel arch liner.
R
emove and refit the wheel arch liner or
INSTALL a new wheel arch liner as necessary.
S
teering heavy operation in
both directions
Low power steer
ing fluid.

CHE
CK steering system
for signs of steering
fluid loss.
BLEE
D the power steering system. For
additional information,
REFER to Section 211
-0
0 Steering System
- General Informati

on
.
Ai

r in power steering
system.
CHECK
the power steering pump for signs o
f steering fl

uid loss.
INST

ALL a new power steering pump as
necessary. For additi onal information,
REFER to Section 211
-0
2 Power Steering
.
Fluid loss at the power
steering pump shaft seal.
CHECK
the power steering pump for signs o
f steering fl

uid loss.
INST

ALL a new power steering pump as
necessary. For additi onal information,
REFER to Section 211
-0
2 Power Steering
.
Power steeri

ng fluid
delivery pressure or flow too low.
CHECK
the power steering pump for signs o
f steering fl

uid loss.
CHECK

the power stee
ring pressure. For
additional information, REFER to the Power Steering Pressure Test in this section.
INST
ALL a new power steering pump as
necessary. For additi onal information,
REFER to Section 211
-0
2 Power Steering
.
Steeri

ng operation varies
from heavy to light when
driving at constant speed
Lower steeri
ng column
interference.
CHECK
the steering co
lumn is free from
interference from the en gine harness, sound
proofing or the floor covering.
Incorre
ct sp
eedometer
signal.
CHECK
the speedo circ
uit. For additional
information, refer to the wiring diagrams.
Steeri
ng transducer
cable/connection faulty or grounded.
CHECK
the steering transducer circuit. For
additional information, refer to the wiring diagrams.
Carry ou
t the electrical checks and tests.
For additional information, REFER to the
Electrical Checks and Tests in this section.
Steeri
ng wheel varies from
light to heavy two times per revolution
Lower steeri
ng column
interference.
CHECK
the steering co
lumn is free from
interference from the en gine harness, sound
proofing or the floor covering.
Steeri
ng column universal
joints binding.
IN
STALL a new steering column. For
additional information,
REFER to Section 211
-0
4 Steering Column
.
Seized or damaged
ste
ering components.
CHECK
for wear or failure of suspension
bushes and ball join ts. For additional
information,
REFER to Section 204
-00
Suspension
Sy

stem
- General
Information
.
Cond

ition
Possib
le Sources
Acti
on
Acce

ssory drive
belt squeal
Incorre
ct accessory drive belt

tension or accessory drive belt glazed.
CHECK
accessory drive belt condition and INSTALL a
new accessory drive belt as necessary. For additional
information,
REFER to Section 303
-0
5 Accessory Drive
.
Chir

p noise in
the steering pump
Loose or worn accessory dr
ive belt.
CHECK
accessory drive belt condition and INSTALL a
new accessory drive belt as necessary. For additional
information,
REFER to Section 303
-0
5 Accessory Drive
.