1998 JAGUAR X308 AUTOMATIC

                    Knock Sensor  (KS)  RH  (18.30.93)  
                    
Variable Camshaft  Timing  (VCT)  Oil  Co ntrol
 
Solenoid  (18.30.90)  
 
        
307:  Automatic  Transmission/Transaxle  
 
             307‐01A : Automatic  Transmission/Transaxle  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA V8  ‐ AJ27  
                 Specification  
                 Description  and  Operation  
                     Transmission  Description 
                 Diagnosis  and  Testing  
                     Diagnostic Strategy  
                 General Procedures  
                     Transmission  Fluid Drain  and  Refill  (44.24.02)  
                 In‐Ve
hicle  Repair  
                     Electronic Pressure  Control (EPC)  Solenoid  (44.15.51)  
                     Extension Housing  Seal  (44.20.18)  
                     Extension Housing  O ‐Ring  Seal  (44.20.19)  
                     Main Control  Valve Body  (44.40.01)  
                     Output Shaft  Speed  (OSS)  Sensor  (44.15.41)  
                     Shift Solenoids  (SS)  (44.15.50)  
                     Transmission  Control Module  (TCM)  (44.15.32)  
                     Transmission  Fluid Filter  (44.24.07)  
                     Transmission  Fl
uid  Pan  (44.24.04)  
                     Transmission  Fluid Pan  Gasket  (44.24.05)  
                     Transmission  Internal Wiring  Harness  (44.15.35)  
                     Transmission  Internal Wiring  Harness  Electrical  Connector  O‐Ring  Seals  
            (44.24.20) 
                     Transmission  Range (TR)  Sensor  
                     Transmission  Support Insulator  (12.45.04)  
                     Turbine Shaft  Speed  (TSS)  Sensor  (44.15.40)  
                 Removal 
                     Transmission  (44.20.01) 
                 Disassembly  and  Assembly  of Subassemblies  
                     Input Sh
aft  Seal  (44.32.07)  
                     Torque Converter  (44.17.07)  
                 Installation  
                     Transmission  (44.20.01) 
Mass
 
Airflow
 
Sen s
or
 
Knock
 Sensor
 (KS)
 LH
 (18.30.92)
 

 
            307‐01B : A u
tomatic
 Transmission/Transaxle  ‐ 4.0L  SC  V8 ‐ AJ26  
                 Specification  
                 Description  and  Operation  
                     Transmission  Description 
                 Diagnosis  and  Testing  
                     Diagnostic Strategy  
                 General Procedures  
                     Transmission  Fluid Drain  and  Refill  (44.24.02)  
                 In‐Vehicle  Repair  
                     Extension Housing  Seal  (44.20.18)  
                     Main Control  Valve Body  (44.40.01)  
                     Transmission  Fluid Filter  (44.24.07)  
                     Transmission  Fl
uid  Pan  Gasket  (44.24.05)  
                     Transmission  Internal Wiring  Harness  Electrical  Connector  O‐Ring  Seals  
            (44.24.20) 
                     Transmission  Support Insulator  (12.45.04)  
                 Removal 
                     Transmission  (44.20.01) 
                 Disassembly  and  Assembly  of Subassemblies  
                     Input Shaft  Seal  (44.32.07)  
                     Torque Converter  (44.17.07)  
                 Installation  
                     Transmission  (44.20.01) 
 
             307‐02A : Transmission/Transaxle  Cooling  ‐ 3.2L  NA  V8  ‐ AJ26/4.0L  NA  V8  ‐ AJ
27  
                 Description  and  Operation  
                     Transmission  Cooling 
 
             307‐02B : Transmission/Transaxle  Cooling  ‐ 4.0L  SC  V8 ‐ AJ26  
                 Description  and  Operation  
                     Transmission  Cooling 
 
             307‐05A : Automatic  Transmission/Transaxle  External  Controls  ‐ 3.2L  NA  V8  –  
            AJ26/4.0L NA  V8  ‐ AJ27  
                 Description  and  Operation  
                     External Controls  

                Diagnosi
s
 and  Testing  
                     External Controls  
                 General Procedures  
                     Brake Shift  Interlock  Actuator Adjustment  (44.15.49)  
                     Brake Shift  Interlock  Actuator Manual  Override  
                     Kickdown Switch  Adjustment  (44.15.38)  
                     Selector Lever  Cable  Adjustment  (44.15.07)  
                 Removal and  Installation  
                     Brake Shift  Interlock  Actuator (44.15.48)  
                     Kickdown Switch  (44.15.23)  
                     Selector Lever  Cable  and  Bracket  (44.15.08)  
                     Selector Lev
er Gate  Finish  Panel  (76.25.24)  
                     Selector Lever  Indicator  Assembly  (44.15.14)  
                     Selector Lever  Indicator  Disc  (44.15.15)  
                     Selector Lever  Switch  (44.15.52)  
                     Selector Lever  Knob  (44.15.06)  
                 Disassembly  and  Assembly  
                     Selector Lever  Assembly  (44.15.05)  
 
             307‐05B : Automatic  Transmission/Transaxle  External  Controls  ‐ 4.0L  SC  V8 ‐ AJ26  
                 Description  and  Operation  
                     External Controls  
                 Diagnos
is and  Testing  
                     External Controls  
                 General Procedures  
                     Brake Shift  Interlock  Actuator Manual  Override  
                     Kickdown Switch  Adjustment  (44.15.38)  
                     Selector Lever  Cable  Adjustment  (44.15.07)  
                 Removal and  Installation  
                     Brake Shift  Interlock  Actuator (44.15.48)  
                     Kickdown Switch  (44.15.23)  
                     Selector Lever  Cable  and  Bracket  (44.15.08)  
                     Selector Lever  Gate  Finish  Panel  (76.25.24)  
                     Selector Lev
er Indicator  Disc  (44.15.15)  
                     Transmission  Control Switch  (TCS)  (44.15.12)  
                     Selector Lever  Knob  (44.15.06)  
 

irri
tation and dermatitis. In addition, used engine oil contains potentially harmful contaminants which may cause skin
cancer. Washing facilities and adequate means of skin protection should be provided.
Observe these recommendations:
Wear pro t
ective clothing and impe
rvious gloves when necessary.
Do not put oily
rags in pockets. Avoid contaminat
ing clothes, particularly underwear, with oil.
Overal
ls must be cleaned re
gularly; discard oil impregna ted clothing and footwear wh ich cannot be washed or
cleaned.
Fi rst
Aid treatment should be obtained
immediately for open cuts or wounds.
Use barrier
creams, applying before each work period, to en
able easier removal of dirty oil and grease from the skin.
Wa
sh with soap and water to ensure th
at all oil is removed (skin cleaner and a nail brush will help). The use of
preparations containing lanolin will help to replace the natural skin oils which have been removed.
Do
not use petrol, kerosene, gas oil, th
inners or solvents for washing skin.
If
skin disorders develop, obtain medical advice immediately.
Wh
ere prac
ticable, degrease components prior to handling.
W
h
ere there is a risk of fluids coming into contact with th
e eyes, suitable eye protection should be worn - goggles or
face shield. An eye wash facility should be provided.
Ensure that a
dequate ventilation is provided when volatile degreasing agents are being used.
E
n
vironmental Protection
In so
m
e countries it is illegal to pour used oil onto the ground
, down sewers or drains, or into water courses. The burning of
used engine oil in small space heaters or boilers is not reco mmended unless emission control equipment is fitted. Dispose of
used oil through authorized waste disposal contractors, to licensed waste disposal sites or to the waste oil reclamation
trade. If in doubt, contact the Local Authority for advice on disposal facilities.
On-Board Diagnostics (OBD)
Ve
hicles use programmed electronic control systems to prov
ide engine management and emission regulation, automatic
transmission operation and anti -lock braking control. These control systems ha ve an integral On-Board Diagnostics (OBD)
facility for use in conjunction with either Jaguar diagnostic equipment or a scan t ool which is capable of retrieving DTCs,
PIDs and performing active commands.
The OBD information in this manual provid es diagnostic and rectification procedures for emission related electrical and
mechanical systems. The informat ion is intended to facilitate fault diagnosis and the subsequent rectification of vehicles
without recourse to the portab le diagnostic unit (PDU).
OBD related information can be fo und in the following sections:
General Information

Engine M

anagement System
Auto

matic Transmission
Anti-lock Br

aking System
Where appropriate a section comprises the following sub-sections:
Description and Operation
A ge
neral illustration and parts list to help the identi
fication of the particular system or component.
A b
rief description of the system operating characteristics and monitoring procedure
accompanied by a component
illustration.
Addi ti
onal information, where appropriat
e, is provided in the form of component calibrations, characteristics and
cross sectional views.
A localized circui
t diagram is included to provide circuit iden
tification and details of connectors, splices, fuses, wire
gauge and colors. See Circuit Diagrams.
Diagnosis and Testing (dedicated to fault analysis and rectification)
Recommended special tools. Symptom chart; a ch
art contai
ning all relevant Diagnostic Trouble Code s (DTC), their possible causes and an
indication of the appropriate test.
Sp
ecific pinpoint test(s), de
signed so that fault diagnosis can be carr ied out in a logical and efficient manner.

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

Mem
ory
Pulse Width ModulationPW

M
A
method of control in an electronic co
ntrol system in which the duration of
pulses in a pulse train is proportional to the amplitude of the modulating
signal
R
Ran
dom Access Memory
RAMF
ast access memory store which is accessible for entry or extraction of data
Re

ad-Only Memory
RO
M
F
ast access memory in which data
is fixed and may not be changed
Re
servoir
RESContaine
r, usually for oils,
coolants or hydraulic fluids
Re
turn
RTNA
dedicated sensor ground circuit
R

evolutions Per Minute
RP
M
Shaft speed o
f a device, us
ually an engine or motor
R
ight-hand
RH
Right-hand drive veh

icle
RHD
S
Scan T

ool
STDe
vice that interfaces with and comm
unicates information on a data link
Se
at Control Module
SCMModule
controlling the seat motor systems (not electric raise/lower-only
seats)
Secon
dary Air
Air pro
vided to the exhaust system
Secon

dary Air Injection
AIRSy
stem used for a period of time each
time the engine is started, unless
certain temperature criter ia are met. Pumps air directly into the exhaust
system which generates extra heat and reduces the time taken for the
catalytic converters to reach operating temperature
Secon
dary Air Injection
Bypass
AIRBVents secon
dary air to atmosphere
Secon

dary Air Injection
Check Valve
AIRCValve wh
ich prevents back-flow of exhaust gas to the AIR system when the
system is inoperative
Secon
dary Air Injection
Diverter
AIRDD
iverts secondary air to either
the catalyst or exhaust manifold
Secon
dary Air Injection
Magnetic Clutch
AIRP
C
Clu
tch mounted on the AIRP drive shaft
Secon

dary Air Injection
Pump
AIRPMe
chanically driven rotary vane
pump, driven through the AIRPC
Secon
dary Air Injection
Relay
AIRRCont
rols the injection of air into the exhaust system
Secon

dary Air Injection
Switchin
g Va
lve
AIRSV
acuum operated valve backing-up the AIRC
Secu

rity and Locking
Control Module
SLCMModul
e controlling the vehicle's security and closure-locking functions
SensorSGeneri

c name for a device
that senses either the absolute value or a change
in a physical quantity su ch as temperature, pressure or flow rate, and
converts that change into an electrical quantity signal
Servic
e Repair Operation
(number)
SRONu
mber generated by Jaguar Methods
and Techniques system which relates
to the time allowed to complete a repair operation. Further information on the
system can be found in the separate Jaguar Publications (for each model
range) entitled 'Repair Operation Times'
Shif
t signal
SDA
shift process signal to the TCM on SC vehicles
Shif

t Solenoid
SSControls shi
fting in an automatic transmission
Si

gnal return
SIG RTN
Slidin

g Roof Control
Module
SRCM
Society of Automotive

Engineers
SAE
Speed
Control Control
Module
SCCMModule con
trolling Speed Control System
Square c

entimeter
cm
2
Stan

dard
std
Stan

dard Corporate
Protocol
SCPA
high-speed, serial communications system linking all body system control
modules. Control messages and data ar e passed between modules at up to
786 messages per second
SuperchargerSCAn in
take system which utilizes a supercharger (mechanically driven device
that pressurizes intake air, thereby in creasing density of charge air and the
consequent power output from a given displacement)
Supercharger
Bypass
SCB
SwitchSW
T

Tacho
meter
TACHA
ci
rcuit that provides input for
an electronic tachometer display
Thermal Vacuu
m Valve
TVVControls vacuum l
e
vels or
routing based on temperature
Throttle
Body
TBDe
vi
ce containing the throttle
Throttl
e
Position
TP
Throttl
e
Position Sensor
TPSInterprets throttl
e

position and movement to iden tify idle, acceleration and
full-power demands
Top Dead CenterTDC
Torque Converter C
lutch
TCC
To
tal
indicator reading
TIRThe t
o
tal indicated movement on a DTI with the test piece rotated through
360°
Transm
ission Control
Module
TCMControls
the shifting pattern
of the (automatic) transmission
Transm
ission Control
Switch
TCSModifi es
the operation of electronically controlled transmissions
Transmission Oil
TemperatureTOTIndi
cat
es temperature of transmission fluid
Transmission RangeTRThe ran
g
e in which the transmission is operating
Transmission Spe
e
d
Sensor
TSSIndi cat
es rotational speed of transmission output shaft or turbine shaft
V
Vacuu
m
Solenoid Valve
VSVVacuu
m
operated valve used in the speed control system
Vacuu
m
Solenoid Valve
(atm)
VSV VAVacuu m
atmospheric valve used in the speed control system
Vacuu
m
Solenoid Valve
(rel)
VSV VRVacuu m
release valve used in the speed control system
Vacuu
m
Solenoid Valve
(vac)
VSV VVVacuu m
valve used in the speed control system
Variable Valve TimingVVTA
s
ystem by which the relationship of the crankshaft and camshaft may be
altered during engine running
Vehi cl
e Battery Adapter
VBAProvide
s
electrical power to the PDU
and supplies a battery reference level
Vehicl
e Condition Monitor
VCMInst
rum
ent panel display which warns of faults
Ve
hic
le Emission Control
Information Label
VECI Label
Vehi cl
e Identification
Number
VINN u
mber assigned to the vehicle by the manufacturer, primarily for licensing
and identification purposes
Vehi cl
e Interface Adapter
VIAExtends the
PDU ca
pability and provid
es a parallel interface to vehicle
harnesses and ECMs
Vehicle Spe e
d Sensor
VSSSens
or which provides ve
hicle speed information
Viscosity In
dexVI
Voltage RegulatorVRDe
vice which regulates the variable output voltage of a generator
W
Wat
tWSI unit of power (1 hp = 7
45.7 watts)
W
i
de Open Throttle
WO
TFu
ll throttle position

Identification
Codes -
Identification Codes
Descr
iption and Operation
En

gine Number
The en
gine number (10 digits) is stamped on a raised pad on th
e front of the engine block near the thermostat housing. The
piston grade reference (8 digits) is also shown.
Automatic Transmission
Number
The
serial number of the transmission unit is displayed on
a metal or bar code label attached to the LH side of the
transmission casing.
Veh
icle Identification
Dependent
upon market, the VIN and other info
rmation is displayed on a label located ei ther on the rear edge of the LH front
door or on the body front upper crossmember. For certain mark ets, the VIN appears on a bar code label referred to as the
Certification Label and additionally carries the month and year of manufacture, vehicle weight data and paint and trim codes.
The VIN is also displayed on a plate visible through the windshie ld. It is essential that the vehicle identification number (VIN)
is quoted when ordering parts, and in all associated correspondence.

ItemDe
scription
GVW

R
G
ross Vehicle Weight Rating
GAW

R F
Gros
s Front Axle Weight Rating
GAW

R R
Gros
s Rear Axle Weight Rating
Pai

nt
Pai
nt Code
TrimTrim

Code