1998 JAGUAR X308 303

13. Refit the rotary switch and tighten the two screws to the
specified torque figure. Locate the switch harness into the clips.

14. Connect the fluid cooler pipes to the transmission.
Remove the blanking plugs.
Fit new O-ring seals.
Tighten the union nuts to the specified torque figure.

15. Remove the engine support beam.
Remove both engine lifting brackets 303 - 536.
16. Refit the RH downpipe catalytic converter. Refer to Operation
17.50.09 and 17.50.10
17. Refit the front muffler. Refer to Operation 30.10.18.
18. Refit the LH downpipe catalytic converter. Refer to Operation
17.50.09
19. Lower the vehicle on the ramp.

and/or increased performance as appropriate.
Serial Communications Interfaces
Controller Area Network (CAN)
The TCM is an integral part of the CAN system which facilita tes the interchange of real-time data between control modules
and sensors; refer to 303-14 fo r a full description of CAN.
Transmission Pressure Regulators and Shift Solenoids Circuit Diagram

ItemPart NumberDescription
1—Transmission oil temperature sensor
2—Switch
3—Shift solenoid 1 <-> 2, 4 <-> 5
4—Shift solenoid 2 <-> 3

Automatic Transmission/Transaxle - 4.0L SC V8 - AJ26 - Transmission
Removal
Removal
Special Tool(s)

Engine support
303-021

Engine lifting brackets
303-536
1. Select N gear position.
2. Disconnect the battery ground lead.
3. Remove the engine covers. Re fer to Operation 12.30.06.
4. Remove the air intake tube, MAFM and air cleaner cover
assembly. Refer to Operation 19.10.30.

5. Disconnect the transmission link lead connector.
1. Release the connector fr om its mounting bracket.
2. Disconnect the multiplug.

6. Remove the EMS harness mounting bracket.
Release the bolt, bracket to cylinder head.
7. Fit engine lifting bracket 307 - 536 at the rear RH.

Automatic Transmission/Transaxle - 4.0L SC V8 - AJ26 - Transmission
Installation
Installation
Special Tool(s)

Engine support
303-021

Engine lifting brackets
303-536
1. CAUTION: A new transmission requires a NEW torque
converter.
Installation is the re verse of the removal procedure, noting the
following:
2. Clean all mating faces and relevant parts.

3. Apply lubricant, MOLYCOTE or equivalent to the torque
converter spigot.

4. Fit the screw (lower) securing th e harness link lead heatshield.
Tighten to the specified torque figure.
5. Fit the dipstick lower tube.
Remove the blanking plug and fit a new O-ring seal.
Tighten the bolt to the specified torque figure.

Fuel System - General Inform
ation - Fuel System
Description an
d Operation

The fuel tank is mounted across the vehicle behind the passenger compartment bulkhead.
Fuel is drawn by the fuel pump from the tank and then supplied to the two fuel rails, via a filter.
Fuel injectors are installed in the fuel ra ils on each side of the intake manifold.
The amount of fuel injected into th e engine is controlled by the ECM.
A cross-over pipe connects the two fuel ra ils together at the front of the manifold.
A test valve in the cross-over pipe allo ws the fuel rail to be pressurized and de-pressurized during the servicing and
troubleshooting procedures.
A pressure regulator on the rear of the right fuel rail controls the pressure in the fuel rails.
A return line directs excess fuel from the pressure regulator back to the fuel tank.
Operation and service procedures
The fuel injector
s, rails, pres
sure regulator and, wher e fitted, supercharger are described in greater detail in Section 303-04
together with servicing procedures.
The fuel tank, pump, fuel level senders and fuel lines are similarly covered in Section 310-01.

Filler Cap and P
ipe
The fuel
filler cap with bayonet-type fixi
ng is located beneath a remote-release sp ring-latched lid on the rear saddle panel
on the left-hand-side of the vehicle.
Fuel Pum
p
The fu
el pump(s) is energized by an ECM co
ntrolled relay. Fuel is drawn by this pu mp and supplied to the fuel injectors via
the fuel line, filter and fuel rails.
Servicing of the fuel pump re quires fuel tank removal.
Ev
aporative Loss Flange Assembly
The evaporative-loss flan
ge asse
mbly is mounted centrally on top of the tank. The flange assembly consists of a removeable
steel cap which mounts the evaporative emissions system vapor outlet valves and, if applicable, a pressure sensor. The
external electrical supply to th e fuel pump(s) is also made via a connector on the flange.
The flange assembly is fixed to the tank by a locking ring which is turned usin g special tool JD-174. A seal is fitted between
the flange assembly and the tank. Three di fferent flange assemblies are applicable according to the evaporative emission
system fitted to the vehicle. The fl ange size and fixing are identical fo r the three systems, as described.
Removal of the evaporative flange assembly is necessary to gain access to th e fuel pump(s) and other internal components.
To remove the evaporative fl ange assembly the fuel tank must first be removed.
The evaporative flange variant assemblies are described, together with service information, in Section 303-13.
Fuel R
eturn
Excess fuel
is directed back to
the fuel tank via a return line.
Fuel Pum
p Relay
The
fuel pump relay,
under control of the ECM, switches power to the fuel pump motor.
I
nertia Fuel Shutoff (IFS) Switch
The IF
S switch is located in the right-hand
side footwell behind the footboard carpet . When activated the switch isolates the
ignition system and fuel pump, releases any locked doors and disables unnecessary electrical systems. The system can be
reset by pressing down the flexible cover on the top of the switch.
• NOTE: The doors will not unlock if the IFS switch is tripped when the ignition switch is in position '0'.

Fuel Tank and Li
nes - Fuel Pump
Re
moval and Installation
Remov

al
Installation

1.
WARNING: B
EFORE PROCEEDING, IT IS ESSENTIAL THAT

THE WARNING NOTES GIVEN IN SECTION 100-00 (UNDER THE
HEADING 'SAFETY PRECAUTIONS') ARE READ AND
UNDERSTOOD.
Remove the battery. For additional information, refer to Section
414
-0
1 Battery, Mounting and Cables
.
2.
Drain th
e fuel tank using a suitab
le suction pump/tanker. If the
On-board Refueling Vapour Recove ry (ORVR) system is fitted,
refer to Section 310
-00
Fuel System
- General
Information
.
3. R
emove the fuel tank. For addi
tional information, refer to Fuel
Tank
in this section.
4. Remove the fuel tank evaporativ e loss flange sealing ring. For
additional information, refer to Section 303
-13

.
5. R
emove fuel feed hose from tank.
U

sing special tool JD175, slacken fuel feed hose to tank
stub securing clip.
Di
sconnect hose from tank stub.
6. Remove fuel pump assembly.
R
elease bolt securing fuel
pump mounting bracket and
place assembly to front.
Slac
ken securing clip and disc
onnect hose from fuel pump.
R
emove link lead from fuel pump.
Re

move pump.
1. NOTE: Install new sealing ring to evaporative loss flange. For
additional information, refer to Section 303
-13

.
In
stallation is th
e reverse of the removal procedure.

Symp
tom #5
Sy
m
ptom #5


Low r
e
frigerant charge
*
Check f or 'hissi
ng' at expansion
valve; may be witnessed by low
HIGH side pressure. Recover / recharge
*
Moi
s
ture or air in the system
*
Chec k syst
em pressures
*
Heat er ci
rcuit air-lock
*
R e
fer section 303-03 for fill / bleed procedure
*
Suct ion
pipe touching bank 1 (A)
cylinder head (rubber isolator
missing)
*
Check the pi
pe cluster for correct fitti
ng
*
• NOTE: Electrical faults may be more rapidly traced using PDU
Sym
ptom
Possib
l
e Sources
Acti
o
n
Insuffi
ci
ent
heating
Coo l
ant flow valve stuck 'closed'
Coolant flow valve stuck 'open' allowing recirculation of
coolant at engine idle
*
*
Re
new v
alve
*
Motorized in-car aspirator sei zed
*R e
new aspirator
*
Coo l
air bypass damper stuck open

*
Re new,
check fault code #43

*
B l
ocked air inlet / pollen filter
*
Chec k / cl
ean / renew
*
B l
ower speed low
*
Check performance range
*
Low cool ant
level
*
Adjust as req u
ired (verify and correct
reason for loss)
*
Engine
t
hermostat faulty
*
Check engine r u
nning temperature
*
Heater water pump seized
*Chec k op
eration
*
Heater ma trix
blocked
*
Re new m
atrix
*
Heater circui t
air-lock
*
R e
fer section 303-03 for fill / bleed
procedure
*

Sym
p
tom #4
Sym
ptom #4
Sy
m
ptom
Possib
l
e Sources
Acti
o
n
No
i
sy
system
Loose or damaged compressor drive
belt
*Adjust or r
e
new
*
Loose compressor mountings
*Check f o
r damage, tighten to specification if OK
*
Compressor oil level l
ow
*
Look for evidence of l
eakag
e and rectify as required
*
Compressor internal dama ge
*Check f o
r debris, renew compressor and receiver drier
*
B l
ower motor noise
*
Re new m
otor (assuming no fan interference)
*
Excessive refrige rant charge
*Check f o
r vibration or 'thumping'
in high pressure line; may be
witnessed by high pressure on both HIGH and LOW sides.
Recover / recharge
*