air condition JAGUAR X308 1998 2.G Owner's Guide

E
ngine Management System Components
Electronic Throt
tle
The
electronic throttle assembly, in resp
onse to signals from both the driver and the ECM, adjusts idle speed, sets the
throttle valve to the position requested by the driver's accelerator / throttle pedal, cruise and traction control, power
limitation and catalyst warm-up.
Mass
Air Flow Meter
The sensor i
s located in the air flow mete
r assembly and outputs an analogue voltag e to the ECM. This sensor measures air
flow into the engine inlet system and is calibrated to measure kg / hour.
In
take Air Temperature
Th
e intake air temperature sensor is loca
ted in the air flow meter assembly and outputs an analogue voltage to the ECM.
The ECM will substitute a default value eq ual to 50°C should this sensor fail.
Fuel Injectors
The eigh
t bottom fed fuel injectors are located in the fuel rails. Th
e fuel injectors are electromagnetic solenoid valves
controlled by the ECM. The pulse time for the injector combined with the fuel pr essure determines the volume of fuel
injected to the manifold.
Fue
l Delivery
The fu
el pump provides fuel to the fuel rail where the circulat
ing pressure is controlled by a pressure regulator valve; excess
fuel is returned to the fuel tank.
The pressure regulator valve is controlled by manifold depression so that fuel delivery pressure is maintained at
approximately 3 bar above manifold pressure.
Fuel Pump
Relay
The ECM controls thi

s component for normal
engine running. The security system may disable this relay via communication
with the ECM.
Fuel Lev
el Sensing
The tank fuel

is measured by the fuel le
vel sensor . This signal is used by the ECM as an in put to certain diagnostics.
Eva
porative Valve
Excess vapour

formed in the fuel tank is
absorbed into the evaporative emission pu rge control canister. While the engine is
running, the fuel absorbed in the canister is gradually purged back into the engine. The rate of purging is governed by
engine operating conditions and vapour concentration level. Operating conditions which affect the purge rate are:
2—Purge
valve
3—Engine

torque reduction
4—E

lectronic throttle assembly
5—Coo

ling fans
6—Ignition amplifier driver
7—Engine overspeed
8—Cli

mate control compressor clutch
9—O

BDII information (J1962, CAN, ISO)

10—F
uel pump relay
11—Heat

ed oxygen sensor
12—Vari

able valve timing
13—MIL sw

itching



ECM Out
puts
It

em
Par
t Number
De
scription
1—Exhaus

t gas recirculation

Pin
point test B: P1393 (P1398) VVT solenoid circuit high input
W
ith EM014 disconnected, measure the resistance
between EM014/009 and ground EM016L
1
I
s the resistance < 0.5 OHM?
Yes Reconnect EM014, EM015, PI031 or (PI032)
GO to A6
No Inspect harness / connector EM014, ground stud and
splice EMS37 for corrosion, damage, bent or pushed back
pins and repair as required. Test the system for normal
operation.
A6
: END
Perform

appropriate service drive cycle and check for the
presence of DTC.
1
Has
the fault code cleared?
Yes STOP
No Contact Jaguar Service
P
INPOINT TEST B : P1393 (P1398) VVT SOLENOID CIRCUIT HIGH INPUT
•
NOTE: References in brac
kets are for Bank B (2)
T
EST CONDITIONS
D
ETAILS/RESULTS/ACTIONS
B1

: RETRIEVE DTCS
•

NOTE: Battery and or ECM disconnection prior to scanning wi
ll erase all data, ensure that the correct DTC is present.

Pinpoint test C: P1396
VVT solenoid malfunction
W
i
th EM015, EM014 PI031 and PI032 disconnected,
measure the insulation resistance between EM015/009
and EM015/008
1
I s
the resistance > 10 MOHM?
Yes Reconnect all connectors
GO to B7
No Inspect EM015 and PI031 (PI032) for corrosion, bent /
pushed back pins or locate and repair the harness /
connector PI001/016 (PI001/027). Test the system for
normal operation.
B7: EN
D
Perform
a
ppropriate service drive cycle and check for the
presence of DTC
1
Has th
e fault code cleared?
Yes STOP
No Contact Jaguar Service
PINPOINT TES
T C : P1396 VVT SOLENOID MALFUNCTION
T
E
ST CONDITIONS
D
E
TAILS/RESULTS/ACTIONS
C1
: RETRIEVE DTC
S
•
NOTE
: Battery and or ECM disconnection prior to scanning wi
ll erase all data, ensure that the correct DTC is present.

W
ith EM014 disconnected, measure the resistance
between EM014/009 and ground EM016L
1
I
s the resistance < 0.5 OHM?
Yes Reconnect EM014, EM015, PI031 or (PI032)
GO to C10
No Inspect harness / connector EM014, ground stud and
splice EMS037 for corrosion, damage, bent or pushed
back pins and repair as required. Test the system for
normal operation.
C9
: CHECK MECHANICAL CONDITION
R

emove the VVT(s) and ensure
that there is no foreign
matter blocking the oil passageway
1
OK
?
Yes GO to C10
No Rectify as required
C
10: END
Perform

appropriate service drive cycle and check for the
presence of DTC.
1
Has
the fault code cleared?
Yes STOP
No Contact Jaguar Service

15. Release the air conditioning compressor.
Remove the lower securing bolts.
Loosen, but do not remove, th e upper securing bolts.
Release the compressor from the lower dowel.

16. Remove the four bolts (two each side) which secure the
exhaust downpipes to the oil pan body.

17. Remove the oil pick-up pipe.
1. Remove the bolts which secure the pipe.
2. Remove the pipe.
3. Remove and discard the seal.
18. Remove the bolts, ten outer an d six inner, which secure the
oil pan body.
Remove the oil pan body.

Tighten the oil filter to 15-18 Nm.

12. Install the crankshaft position sensor.
1. Install the sensor to the flywheel housing and fit the
securing bolt. Tighten to 8-12 Nm.
2. Install the access grommet to the housing.

13. Install the four bolts (two each side) which secure the
exhaust downpipes to the oil pan body.

14. Install the air conditioning compressor.
Locate the compressor onto the lower dowel.
Tighten the upper securing bolts.
Install and tighten the lower securing bolts to 18-24 Nm.
Tighten the upper securing bolts to 18-24 Nm.
15. Position the transmission cooler pipes and the clamping
bracket. Install the bolt to secu re the clamp and tighten to 7-9
Nm.

15. Release the air conditioning compressor.
Remove the lower securing bolts.
Loosen, but do not remove, th e upper securing bolts.
Release the compressor from the lower dowel.

16. Remove the four bolts (two each side) which secure the
exhaust downpipes to the oil pan body.

17. Remove the oil pick-up pipe.
1. Remove the bolts which secure the pipe.
2. Remove the pipe.
3. Remove and discard the seal.
18. Remove the bolts, ten outer an d six inner, which secure the
oil pan body.
Remove the oil pan body.

Tighten the oil filter to 15-18 Nm.

12. Install the crankshaft position sensor.
1. Install the sensor to the flywheel housing and fit the
securing bolt. Tighten to 8-12 Nm.
2. Install the access grommet to the housing.
Connect the harness clips to the oil pan body.

13. Install the four bolts (two each side) which secure the
exhaust downpipes to the oil pan body and transmission
casing.

14. Install the air conditioning compressor.
Locate the compressor onto the lower dowel.
Tighten the upper securing bolts.
Install and tighten the lower securing bolts to 18-24 Nm.
Tighten the upper securing bolts to 18-24 Nm.
15. Position the transmission cooler pipes and the clamping
bracket. Install the bolt to secu re the clamp and tighten to 7-9
Nm.

Using the special tool, remove the oil filter.
19. Remove the oil pressure switch.
For additional information, refer to Oil Pressure Switch
- in this
section.

20. Remove the crankshaft position sensor.
1. Remove the bolt which secures the crankshaft position sensor to the flywheel housing.
2. Remove the access grommet from the housing.
Remove the sensor and allow it to hang free under the
engine.
Release the harness clips from the oil pan body.

21. Remove the bolt which secures the transmission cooler pipes
and remove the clamping bracket.

22. Release the air conditioning compressor.
Remove the lower securing bolts.
Loosen, but do not remove, th e upper securing bolts.
Release the compressor from the lower dowel.
23. Remove the four bolts (two each side) which secure the
exhaust downpipes to the oil pan body.

11. Install the oil pressure switch.
For additional information, refer to Oil Pressure Switch - in this
section.

12. NOTE: Apply a suitable amount of clean engine oil to lubricate the oil filter O-ring seal.
Using the special tool, install the oil filter.
Tighten the oil filter to 15-18 Nm.

13. Install the crankshaft position sensor.
1. Install the sensor to the flywheel housing and fit the
securing bolt. Tighten to 8-12 Nm.
2. Install the access grommet to the housing.

14. Install the four bolts (two each side) which secure the
exhaust downpipes to the oil pan body.
15. Install the air conditioning compressor.
Locate the compressor onto the lower dowel.
Tighten the upper securing bolts.