1994 JAGUAR XJ6 ECU

Engine (V12)
3.2.3 ENGINE OIL, RENEW
SRO 12.60.00
. Undo and remove the sump plug positioned at the rear of
the sump, drain the engine oil into a suitable receptacle
and dispose of
it in a safe and environmentally friendly
manner.
. Replenishtheengineoiltothecorrect level (1 Fig. 1) onthe
dipstick.
1ynfa: If the '0' ring on the on the filler cap is damaged, re- move the '0' ring and clean the groove. Secure a
new '0' ring in position using silicon sealant. Treat
the screw threads with copper grease, and grease
the top face of the oil filler with Hylosil lubricant.
When the oil is renewed, start the engine, wait for the oil
light to extinguish and switch off the engine for 30 sec- onds.
. Finally remove and wipe clean the dip stick
(Fig. l), check the oil level - replenish as necessary.
For recommended engine oil refer to Appendix AI. Fig.
1
3.2.4
OIL FILTER CARTRIDGE, RENEW
SRO 12.60.04
The white oil filter cartridge displaying the Jaguar logo, is lo- cated on the lower left-hand side of the engine, near side of
the sump. Access for removing the cartridge is from under- neath the vehicle (Fig. 2).
Remove the catalyst heat shield (where fitted) and use a coil
spring type filter wrench to remove the cartridge.
Start and run the engine for a few seconds to charge the
filter, then stop the engine and
checkthe oil level. Replenish
as necessary.
I Fig. 2
Issue 1 August 1994 X300 VSM 3
r

Engine (V12)
3.2.5 OIL COOLER, RENEW
SRO 12.60.68
The oil cooler is located below the radiator, behind the front
bumper and is fitted to the radiator lower mounting using
two securing bolts. The cooler feed pipe comprising several
sections and return pipe (Fig.
1) are connected to the oil
cooler by means of easily detachable quick
-fit connectors.
3.2.6 FRONT ENGINE MOUNTING BRACKET
SRO 12.45.01 LH
SRO 12.45.03 RH
Each of the two engine mounting bracket assemblies com- prises a hydraulic mount (1) secured to an engine side
mounting bracket (2) which in turn is bolted to the lower en- gine housing. The engine mounting heat shield (3) is fixed
to the hydraulic mount studs (41, protruding through the
centre hole of the engine side mounting bracket.
The front of the engine complete with attached mounting
bracket assemblies is seated on support brackets welded to
the front crossmember and is secured to the brackets by a
single fixing arrangement comprising bolts and washers.
. Jack up the vehicle and secure the engine hoist (Service
Tool MS53 C) to lifting eyes of the front engine lifting
brackets
Remove the front engine mounting bracket assembly to
front crossmember fixing bolts.
Thesecan be accessedvia two round openings positioned underneath the cross- member.
Remove any obstructing parts preventing the front end of
engine from being lifted from its seating.
Lift the front end of the engine /transmission unit slightly
and detach the front mounting bracket assemblies from
the lower engine housing.
ASSEMBLV, RENEW
Fig. 1
4 X300 VSM Issue 1 August 1994

Engine (V12)
3.2.7 REAR ENGINEMOUNTlNGASSEMBLY, RENEW
SRO
12.45.04
The rear engine mounting assembly (Fig. 1) comprises a
mounting bracket and spring assembly, secured to body un- derframe longitudinal members using nuts and washers.
With the aid of the engine hoist (Service Tool MS53 C) se- cured to the lifting eyes of the rear engine lifting brackets,
and a jack positioned underthe rear mounting brackettake
the weight of the engine.
. Undo and remove the mounting bracket and spring as-
sembly fixing arrangement.
rn Lower the jack and remove assembly.
Dismantle the assembly, clean all components and exam-
ine for any signs of wear or damage.
Renew components as necessary.
8 112-8'7
Fig. 1
I Issue 1 August 1994 X300 VSM 5

striker and the-fuel cap stowage magnet.
The fuel bowl, retained around the filler neck by a clip, containing a drain tube filter located over the mating drain tube,
is rubber moulded onto a steel armature and fitted to the BIW decking panel by five M5 nuts.
The fuel lid latching assembly fitted to the metal armature of the fuel bowl by an M5 nut, includes the locking pin and
the operating actuator.
The actuator operates from the central locking system driven by the security and locking control module
(SLCM).
The fuel tank, mounted across thevehicle behind the passenger compartment rear bulkhead, is held in position by two
retaining straps, tightened by two M5 fixing arrangements.
The fuel tank of AJ16 engined vehicles contains one fuel pump, supplying fuel to the normally aspirated engine and
two fuel pumps, supplyingfuel to the supercharged engine. They are regenerative turbine pumps supplied by
Nippon- Denso. Nominal operating pressure is 3 bar (3.7 bar for supercharged engine) above the manifold depression and
pump delivery is 90 litredhour minimum at 13.2 volts, 3 bar outlet pressure. The pump(s) draw a nominal current of 7 amperes at 13 volts, 3 bar outlet pressure, ambient temperatures. Built in to the pump assembly is a over-pressure
relief valve which blows at 4.5 - 8.5 bar.
Fuel is drawn by the pumps from the fuel tank and is then supplied to the fuel rail via a
70 micron filter and the fuel
feed line connected in series by fuel filter.
The amount of fuel being injected into the engine
is controlled by the fuel injectors combined with the engine control module (ECM). - Any excessive fuel flowing through the system, is returned to the fuel tankvia the fuel regulator valve mounted on the
fuel rail, the fuel return line and the check valve also located inside the tank.
The two filters prevent contaminants from entering the fuel rail and possible damage to the fuel injectors, the engine,
the pump and the underfloor filter.
The fuel pumps are switched on and off by relays controlled by the engine control module
(ECM).
The second fuel pump for the supercharged engine operates only in the higher speed range, switching on at 4000rpm and off at 3200rpm.
The fuel lines are made up of an assembly, combining steel under floor pipes and flexible conductive anti-permeation
tubing. In orderto perform speedy remove and refit operations, the underfloor steel lines are linked through the engine
bay bulkhead to the flexible tubing, leading to the fuel rail and the fuel regulator by using positive sealing, quick-fit
type connectors. The same type connectors, are used to connect the fuel feed and return line to the fuel tank.
Connectors used inside the engine bay are of different sizes tocorrespond with the difference in pipe diameter, whereas
the connectors for the feed and return lines at the fuel tank are the same size.
Except for the return line connector at the fuel tank, two release tools, one for each size of connector are required to
release all remaining connectors.
-~
Fuel, Emission Control & Engine Management (AJ16)
5.1.2 GENERAL DESCRIPTION
m: WORKING ON THE FUEL SYSTEM MAY RESULT IN FUEL AND FUEL VAPOUR BEING PRESENT IN THE
ATMOSPHERE. FUEL VAPOUR IS EXTREMELY FLAMMABLE, HENCE GREAT CARE MUST BE TAKEN WHllST WORKING ON THE FUEL SYSTEM. ADHERE STRICTLY TO THE FOLLOWING PRECAUTIONS:
DO NOT
SMOEIN THE WORK AREA.
DISPLAY 'NO SMOKING
' SIGNS AROUND THE AREA.
ENSURE THAT A
CO2 FIRE EXTINGUISHER IS CLOSE AT HAND.
ENSURE THAT DRY SAND
IS AVAILABLE TO SOAK UP ANY FUEL SPILLAGE.
EMPTY FUEL USING SUITABLE FIRE
PROOF EQUIPMENT INTO AN AUTHORIZED EXPLOSIOWROOF
CONTAINER.
DO NOT EMPTY FUEL
INTO A PIT.
ENSURE THAT WORKING AREA
IS WELL VENTILATED.
ENSURE THAT ANY WORK ON THE FUEL SYSTEM
IS ONLY CARRIED OUT BY EXPERIENCED AND WELL
QUALIFIED MAINTENANCE PERSONNEL.
The fuel filler assembly, supplied complete with serviceable lid, hinge and hinge spring, is fixed to the Body-in-White
(BIW) decking panel by two M5 nuts. Additional parts of the assembly comprise a adjustable rubber buffer, a snap-in
X300 VSM 3 Issue 1 August 1994

Fuel, Emission Control & Engine Management (AJ16)
. Reposition fuel feed pipe from fuel rail union and fit blanking plugs to rail and pipe.
. Undo and remove regulator mounting bracket to inlet manifold bracket securing bolt (5 Fig.1).
. Undo fuel rail to regulator union nut.
. Reposition regulator from fuel rail union and fit blanking plugs.
. Remove fuel rail assembly (1 Fig.1) from manifold.
Undo
and remove fuel rail securing bolts.
Fig. 1
Fit blanking plugs to manifold.
. Drain the residual fuel from the fuel rail into a suitable drain tin.
. Remove the injector retaining clips (2 Fig.1).
. Remove injectors (3 Fig. 1 ).
Disconnect vacuum hose from regulator.
. Remove regulator mounting bracket.
. Undo fuel rail to regulator union nut.
= Remove regulator assembly.
Refit in the reverse order of the removal procedure.
X300 VSM Issue 1 August 1994 6

Fuel, Emission Control & Engine Management (AJ16)
. Reposition fuel feed pipe from fuel rail union and fit blanking plugs to rail and pipe.
Undo and remove regulator mounting bracket to inlet manifold bracket securing bolt (5 Fig.1).
. Undo fuel rail to regulator union nut.
. Reposition regulator from fuel rail union and fit blanking plugs.
/ 119 L66
Fig. 1
. Undo and remove fuel rail securing bolts.
. Remove fuel rail assembly (1 Fig.1) from manifold.
Fit blanking plugs to manifold.
. Drain the residual fuel from the fuel rail into a suitable drain tin.
Remove the injector retaining clips (2 Fig.1).
. Remove injectors (3 Fig.1).
. Disconnect vacuum hose from regulator.
. Remove regulator mounting bracket.
. Undo fuel rail to regulator union nut.
Remove regulator assembly.
Refit in the reverse order of the removal procedure.
0
0
0
0
Issue 1 August 1994 8 X300 VSM

Fuel, Emission Control & Engine Management (AJ16)
5.1.6 THROTTLE ASSEMBLY (SUPERCHARGED), RENEW
SRO 18.30.17 THROTTLE POTENTIOMETER
SRO 19.70.07 THROTTLE HOUSING GASKET
SRO 19.70.04 THROTTLE HOUSING
J 12-62 2
Fig. 1
Remove
. Disconnect battery.
. Remove the intercooler intake elbow.
. Raise vehicle on a four-post ramp.
. Remove the rear air duct to throttle body connecting hose.
Undo and remove bolts securing EGR supply pipe to manifold.
Remove EGR supply pipe gasket.
Reposition EGR sensor harness multi-plug from mounting bracket.
. Release throttle outer cable abutment from abutment bracket.
. Disconnect throttle inner cable from throttle linkage.
. Disconnect and remove return spring.
. Disconnect speed control actuator vacuum hose.
. Release cooling system pressure by slowly undoing the tank cap.
Tighten cap after pressure release.
. Remove abutment bracket assembly.
Disconnect idle speed actuator harness multi
-plug.
. Disconnect throttle potentiometer harness multi-plug.
. Fit pipe clamps to throttle housing cooling hoses and disconnect hoses from throttle housing.
Remove
the oil filter cartridge and gasket.
Remove speed control speed control bracket to throttle lever clevis pin and pin
circlip.
e
0
0
0
Issue 1 August 1994 10 X300 VSM

striker and the fuel cap stowage magnet.
The fuel bowl, retained around the filler neck by a clip, containing a drain tube filter located
overthe mating drain tube,
is rubber moulded onto a steel armature and fitted to the BIW decking panel. by five M5 nuts.
The fuel lid latching assembly fitted to the metal armature of the fuel bowl by an M5 nut, includes the locking pin and
the operating actuator.
The actuator operates from the central locking system driven by the Security and Locking Control Module (SLCM).
The fuel tank, mounted across the vehicle behind the passenger compartment rear bulkhead, is held in position by two
retaining straps, tightened by two M5 fixing arrangements.
VI2 engined vehicles are equipped with two fuel pumps located inside the tank. They are regenerative turbine pumps
supplied by Nippon Denso. Nominal operating pressure is 3 bar above the manifold depression and pump delivery
is 90 litres/hour minimum at 13.2 volts, 3 bar outlet pressure. The pump draws a nominal current of 7 amperes at 13 volts, 3 bar outlet pressure, ambient temperatures. Built in to the pump assembly is a over-pressure relief valve which
blows at 4.5 - 8.5 bar.
Fuel is drawn by the pumps from the fuel tank and is then supplied to the fuel rail via a
70 micron filter and the fuel
feed line connected in series by fuel filter.
The amount of fuel being injected into the engine is controlled by the fuel injectors combined with the engine control
module (ECM).
Any excessive fuel flowing through the system, is returned to thefuel tankvia the fuel regulator valve mounted on the
fuel rail, the fuel return line and the check valve also located inside the tank.
The two filters prevent contaminants from entering the fuel rail and possible damage to the fuel injectors, the engine,
the pump and underfloor filter.
The second fuel pump is controlled by the engine control module
(ECM) and works of a mapped fuel map. The pumps
'switch on' time depends on the fuel requirement which is depending on the engine load.
The fuel lines are made up of an assembly, combining steel underfloor pipes and flexible conductive anti
-permeation
tubing. In order to perform speedy remove and refit operations, the underfloor steel lines are linked through the engine
bay bulkhead to theflexibletubing, leading to the fuel rail and the fuel regulator by using positive sealing, quick
fit type
connectors. The same type connectors, are used to connect the fuel feed and return line to the fuel tank.
Connectors used inside the engine bay, are of different sizes to correspond with the difference in pipe diameter, where
- as the connectors for the feed and return lines at the fuel tank are the same size.
Except for the return line connector at the fuel tank, two release tools, one for each size of connector, are required to
release all remaining connectors.
Fuel, Emission Control & Engine Management (V12)
5.2.2 GENERAL DESCRIPTION
WARNING: WORKING ON THE FUEL SYSTEM RESULTS IN FUEL AND FUEL VAPOUR BEING PRESENT IN THE AT- MOSPHERE. FUEL VAPOUR IS EXTREMELY FLAMMABLE, HENCE GREAT CARE MUST BE TAKEN WHILST
WORKING ON THE FUEL SYSTEM. ADHERE STRICTLY TO THE FOLLOWING PRECAUTIONS:
PO NOT SMOKF, IN THE WORK AREA.
DISPLAY 'NO SMOKING
' SIGNS AROUND THE AREA.
ENSURE THAT A
CO2 FIRE EXTINGUISHER IS CLOSE AT HAND.
ENSURE THAT DRY SAND
IS AVAILABLE TO SOAK UP ANY FUEL SPILLAGE.
EMPTY FUEL USING SUITABLE FIRE PROOF EQUIPMENT INTO AN AUTHORIZED EXPLOSION PROOF
CONTAINER.
DO NOT EMPTY FUEL INTO A PIT.
ENSURE THAT WORKING AREA IS WELL VENTILATED.
ENSURE THAT ANY WORK ON THE FUEL SYSTEM
IS ONLY CARRIED OUT BY EXPERIENCED AND WELL
QUALIFIED MAINTENANCE PERSONNEL.
The fuel filler assembly, supplied complete with serviceable lid, hinge and hinge spring, is fixed to the Body-in-White (BIW) decking panel by two M5 nuts. Additional parts of the assembly comprise a adjustable rubber buffer, a snap-in
X300 VSM 3 Issue 1 August 1994