ECU JAGUAR X308 1998 2.G Workshop Manual

Ite
m
Part
Number
Descr
iption
1—Fu

el tank pressure sensor (if applicable)
2—Engine m

anagement ECU
3—EVAP canister purge va

lve
4—EVAP ca

nister close valve (if applicable)
5—Engine
mana
gement fusebox - IGN supply
Circuit diagram
,
evaporative emissions systems

Evaporative Emissions - Evaporative Emission Canister Purg
e Valve
Re
moval and Installation
Remov

al
Installation
1. O
pen the engine compartment and fit paintwork protection
sheets.
2. Disconnect the battery.
R
emove the battery cover.
Di

sconnect the battery ground (negative) cable.

3. Di
sconnect the purge valve harness connector.

4. R
emove the two securing nuts.

5. 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.
Disconnect the three valve hoses.
1. Pull off the vacuum pipe.
2. Release the clip and di sconnect the upper vapour
hose.
3. Release the clip and disconnect the lower vapour hose. Plug the hose (note the warning above).
1. R
emove the two mounting rubbers from the old valve and fit to

the new valve.
2. Fitting a new purge valve asse mbly is the reverse of the
removal procedure.

Evapor
ative Emissions - Fuel Va
por Vent Valve Housing Seal
Remov
al and Installation
Re

moval
• NO
TE: The Removal and Installation procedur
es below show one type of flange but are applicable to the other evaporative loss systems
described.
Special To
ol(s)

Lock

Ring Wrench - Fuel Tank Flange
412-070 (JD 174)
1. Remove battery. Refer to 86.15.01.
2. WARNING: BEFORE PROCEEDING, IT IS ESSENTIAL THAT THE
WARNING NOTES GIVEN IN SECTIO N 100-00 (UNDER THE HEADING
'SAFETY PRECAUTIONS') ARE READ AND UNDERSTOOD.
Remove fuel tank assembly for access. Refer to operation 19.55.01.

3. Discon
nect vapor hose(s) from flange assembly.

4. Remov
e locking ring using special tool 412-070 (JD 174).
Insta

ll special tool to locking ring.
Usi

ng a suitable bar, turn special tool anti-clockwise to release
locking ring from the five tank tabs.

5. Lift
flange assembly slightly and disconnect fuel pump link lead from the
underside of flange connector. Secure connector to tank aperture.
6. Discard sealing ring.

E
lectronic Engine Controls -
Electronic Engine Controls
D
iagnosis and Testing
I

nspection and Verification
1.
1. Veri
fy the customer concern.
2. 2. Confirm which, if any, warning li ghts and/or messages were displayed on the instrument cluster.
• NOTE: If any warning lights and/or me ssages were displayed when the fault occurred, refer to the Driver Information
table for DTCs associated with the display, then to the DTC index table for possible sources and actions. Some warnings will
appear to clear when the ignition is cycl ed. This is often because the warning has flagged as a resu lt of one of the vehicle's
on-board diagnostic routines having run to detect the fault. If the same routine is not run when the ignition is switched ON,
the warning will not reflag until the routine does run. See the DTC summaries for drive cycle routines.
3. 3. Visually inspect for obvious signs of mechanical or electrical damage.
V
isual Inspection Chart
4.
4. Veri
fy the following syst
ems are working correctly:
Air in
take system
Coo

ling system
Charging system


F

uel charging system
5. 5. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding
to the next step.
6. 6. Where the Jaguar approved diagnostic sy stem is available, complete the S93 report before clearing any or all fault
codes from the vehicle.
• NOTE: If a DTC cannot be cleared, then there is a permanent fault present that flag s again as soon as it is cleared (the
exception to this is P1260, which will only clear following an ignition OFF/ON cycle after rectification).
7. 7. If the cause is not visually evident and the Jaguar approv ed diagnostic system is not available, use a fault code
reader to retrieve the fault codes be fore proceeding to the Diagnostic Trou ble Code (DTC) Index Chart, or the
Symptom Chart if no DTCs are set.
• NOTE: If the DTC flagged was not present for two or more co nsecutive cycles, it is classed as temporary, and will be
deleted following three cycl es during which no fault was present. This could result in a reported wa rning light/message with
no stored DTCs. If a fault is present for three consecutive cycles, the DTC becomes permanent, and will remain in the
module's memory for 40 drive cycles (a cy cle is an ignition ON/OFF, which will occur during the owner's normal use of the
vehicle. No action on the part of the technician is necessary to perform this cycle. A drive cycle is a series of conditions
needed to make the on-board diagnostic ro utine run, and may need a specific action on the part of the technician. See the
DTC summaries for driv e cycle routines).
8. 8. Using the Jaguar approved diagnostic system where available, and a scan tool where not, check the freeze frame
data for information on the conditions applicable when the fault was flagged. The format of this will vary,
dependin
g o
n the tool used, but can provide information useful to the technician in dia
gnos
in
g th
e fault.

MechanicalElectrical
Engi
ne oil level
Coo

ling system coolant
level
Fuel contamination

Throttle body Poly

-vee belt
F
uses
W

iring harness
E

lectrical connector(s)
Sens

or(s)
Engine

control module (ECM)
Tran

smission control module
Check spark plu

g type. Only re
sisted plugs should be fitted. Refer to specifications
section for gap
Relay date codes.
If the date on the rela
y is between R6 k1 and R6 k8, replace the
relay

CAUTIO
N: When probing connectors to take
measurements in the course of the pinpoint tests, use the adaptor kit,
part number 3548-1358-00.
• NOTE: When performing electrical voltag e or resistance tests, always use a digital multimeter (DMM) accurate to 3
decimal places, and with an up-t o-date calibration certificate. When testing resistance, always take the resistance of the
DMM leads into account.
• NOTE: Check and rectify basic faults before beginning diagnostic ro utines involving pinpoint tests.
Sym
ptom Chart
Sym

ptom
(general)
S y
mptom (specific)
Possib
l
e source
Acti
o
n
No
n
-Start
Engine
does not cran
k
Starter relay ECM relay Batt
ery Park
/Neutral
switch
Starting system

Harness damage
Engine s
iezed
Check r
e
lay dates. Check
for DTCS. For starting
system,
REFER to Section 303
-06 Sta r
ting System
.
F or ECM
relay tests, GO to Pinpoint Test
AD.
.
F o
r battery information,
REFER to Section 414
-0 1
Battery, Mounting and

Cables.
Fo r

Park/Neutral tests, GO to Pinpoint Test AC.
. Fo
r engine information,
REFER to Section 303
-01 En
gine
.
Engine cranks, but does
not fireSecurity
syst
em /Immobiliser
engaged
Thr o
ttle contaminated
Harness damage
Fu
el pump relay
Fue
l
system
R
e
fer to service action
S491
Contact dealer techni
cal
support for information
on security system. For fuel system,
REFER to Section 303
-0 4
Fuel Charging and
Controls.
Check bull etins for throttl
e cleaning procedure.
Check service actions.
Engine cranks an d
fires,
but will not start
F u
el pump relay
Thr
o
ttle contaminated
Purge
val
ve
Fue
l
pump
Engine coolan
t
temperature

(ECT) sensor
Spark plugs
fouled
Ignition coil
fail
ure(s)
Check f
o
r water ingress
into spark plug wells
HT sh o
rt to ground
(tracking) check rubber
boots for cracks/damage
Cyli
nder compression loss
(short-term. Refer to bulletin; 303-52)
Re
fer to service action
S491
Fo
r fuel pump relay tests,
REFER to Section 303
-0 4
Fuel Charging and
Controls.
. Check bulletins for throttl
e cleaning procedure.

Check fuel pressure. Refe r to Technical service
bulletins. For ECT sensor tests, GO to Pinpoint Test C.
. Fo
r ignition system,
REFER to Section 303
-07 En
gine Ignition
.
Check bulletins an d service a
ctions.
Di
f
ficult to
start
D iff
icult to start cold
Roc
h
ester valve
Batt
ery Thro
ttle contaminated
Fue
l
pump
Engine coolan
t
temperature

(ECT) sensor
Purge val
ve
Cyl
i
nder compression loss
(short-term. Refer to bulletin; 303-52)
Blocked part-load breather (s
ervice action S474)
R
e
fer to service action
S491
For R
ochester valv
e test, GO to Pinpoint Test AE.
. Fo
r battery information,
REFER to Section 414
-0 1
Battery, Mounting and

Cables.
Check bull etins for throttl
e cleaning procedure.
Check fuel pressure. For ECT sensor circuit tests,
GO to Pinpoint Test C.
. F
or evaporative
emissions tests,
REFER to Section 303
-1 3
Evaporative
Emiss
i
ons
.
R e
fer to bulletins for co
mpression information,
and service actions for part-load breather procedure and compressions.
Diff
icult to start hot
Roc
h
ester valve
Purge
val
ve
Thr
o
ttle contaminated
F
or R
ochester valv
e test, GO to Pinpoint Test AE.
. F
or evaporative emissions tests,
REFER to Section 303
-1 3
Evaporative

P
INPOINT TEST Y : DTC P1260; SECURITY INPUT MALFUNCTION
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
Y1

: CHECK THE KTM TO ECM CIRCUIT FOR HIGH RESISTANCE
D

isconnect the ECM electrical connector, EM10.
1
D

isconnect the KTM electrical connector, FC22.
2
Me

asure the resistance between EM10, pin 06 (O) and FC22, pin 16 (O).
3
Is th

e resistance greater than 5 ohms?
Yes REPAIR the high resistance circui t. For additional information, refer to the wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.
No INSTALL a new KTM. CLEAR the DTC. TEST the system for normal operation.
PINPO
INT TEST Z : DTC P1474; INTERCOOLER COOLANT PUMP RELAY MALFUNCTION
•
NOTE: Early production vehicl
es have connector pin numbers that differ fro m the volume production pin numbers shown.
Use the wire color code for pin identifi cation on early production vehicles.
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
Z1

: CHECK THE INTERCOOLER PUMP RELAY TO ECM DRIVE CIRCUIT FOR HIGH RESISTANCE
Di

sconnect the battery negative terminal.
1
R

emove the intercooler pump relay.
2
D

isconnect the ECM electrical connector, EM13.
3
Meas

ure the resistance between the rela
y base, pin 01 and EM13, pin 10 (RY).
4
Is th
e resistance greater than 5 ohms?
Yes REPAIR the high resistance circui t. For additional information, refer to the wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.
No GO to Z2
.
Z2
: CHECK THE INTERCOOLER PUMP RELAY TO EC
M DRIVE CIRCUIT FOR SHORT TO HIGH VOLTAGE
R
econnect the battery negative terminal.
1
Turn the ignition swi

tch to the ON
position.
2
Meas
ure the voltage between the
relay base, pin 01 and GROUND.
3
Is th
e voltage greater than 3 volts?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to Z3
.
Z3
: CHECK THE INTERCOOLER PUMP RELAY TO
ECM DRIVE CIRCUIT FOR SHORT TO GROUND
Turn the ignition swi
tch to the OFF
position.
1
Meas
ure the resistance between th
e relay base, pin 01 and GROUND.
2
Is
the resistance less than 10,000 ohms?
Yes
REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to Z4
.
Z4: CHECK THE INTER
COOLER PUMP RELAY GROUND CIRCUIT
Meas

ure the resistance between th
e relay base, pin 02 and GROUND.
1
Is th
e resistance greater than 5 ohms?
Yes REPAIR the high resistance circui t. For additional information, refer to the wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.
No INSTALL a new intercooler pump re lay. CLEAR the DTC. TEST the system for normal operation.
P
INPOINT TEST AA : DTC P1475; RADIATOR
FANS SLOW (SERIES) CIRCUIT MALFUNCTION
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS

E
lectronic Engine Controls - Ca
mshaft Position (CMP) Sensor
Re
moval and Installation
Remov

al
1.
Disc
onnect battery ground cable (IMPORTANT, see SRO
86.15.19 for further information).
2. Remove engine covers ; refer to 12.30.06.
3. WARNING: BEFORE PROCEEDING, IT IS ESSENTIAL THAT
THE WARNING NOTES GIVEN IN SECTION 100-00 (UNDER THE
HEADING 'SAFETY PRECAUTIONS') ARE READ AND
UNDERSTOOD.
De-pressurize fuel system; refer to 19.50.02.

4. R
emove coolant expansion tank fixings and reposition tank for
access.

5. R
emove bolts securing fuel fe
ed pipe to inlet manifold.

6. Di
sconnect fuel feed pipe from inlet manifold and pull pipe
assembly clear.
Di
scard O-ring.
Inst

all suitable blanking plugs.
7. Disconnect CMP sensor connector.
De
press tang on connector to release, tools are not
necessary.

3. Conne
ct CMP sensor connector.

4. Connect
fuel feed pipe to inlet manifold.
R

emove blanking plugs.
Install and lubricate new O-r

ing.

5. Install
bolts securing fuel feed
pipe to the inlet manifold.
6. Install coolant expansion tank.

E
lectronic Engine Controls - Engine
Control Module (ECM) Adaptation
Gen
eral Procedures
When to car

ry out adaptations
DTCs P1000/P1111 Conditions for adaptation
Fuelling Adaptations Drive Cycle
•
NOTE: Make sure the engine is at normal operating
temperature. (75°C, 167°F) 1.
Whenever the battery is disconnected, the Engine Control
Module (ECM) adaptations are reset to a "green" ECM
condition. In this condition, certain functions of the ECM are
inhibited, and the ECM must "r elearn" these functions. To
enable the ECM to do this, the vehicle will have to perform
some maneuvres which it may, or may not, do during a normal
road test. The routine in this pr ocedure should be carried out at
Pre-Delivery Inspection, and after any emissions related
rectification work involving the disconnection of the battery.
2. When the DTCs relating to a rectified concern are cleared,
P1000 (system checks not complete since last memory clear)
will be flagged. This DTC does no t indicate a failure, just that
diagnostic drive cycles need to be performed. The vehicle's on-
board diagnostic system will confirm that all the diagnostic
drive cycles are complete by flagging P1111, (system checks
complete since last memory clear)
1. Make sure these conditions are checked and corrected, if
necessary, before carrying ou t the adaptation procedure.
MechanicalElectrical
Engi
ne oil level correct
Coo

lant level correct
F

uel level greater than
30%, less than 80%
F
uel filler cap correctly
fitted/secure, seal in good condition
Al
l rectification work
relating to DTCs completed
F
uel, ignition and cooling
systems in good order
Al
l Diagnostic Trouble
Codes (DTCs) cleared
Al
l rectification work
relating to DTCs completed
F
uses
Harnes

ses
E

lectrical connectors

1.
Either
the Jaguar approved diagnostic system (where
available), or a scan tool should be connected to measure the
Mass Air Flow rate. Most generi c scan tools should be capable
of reading this parameter.
Depending on road conditions and dealer location, it may be
difficult to achieve the road sp eeds necessary to reach the air
flow indicated. It is possible to reach these air flow figures by
inducing a load on the vehicle, (making use of hills, using a
lower gear ratio, etc) or, if no alternative is possible, by
restraining the vehicle and re aching the air flow figure
Si
te
Mass Air Flow
(gra
ms/second)
D
riving Conditions
1Up t

o 7 g/s
Idle
in
P for 2 minutes
21
0 to 14 g/s
O
pen throttle in
P for 2 minutes
31
8 to 22 g/s
O
pen throttle in
P or D with
guidance * for 2 minutes
42
5 to 30 g/s
D
rive with guidance * for 2
minutes

E
lectronic Engine Controls - Engine Control Module (ECM)
Re
moval and Installation
Remov

al
Installation

1.
Disc
onnect battery ground cable (IMPORTANT, see SRO
86.15.19 for further information).

2. R
emove ECM housing cover.
3. RHD only: Remove security bracket securing screws.
R
emove bracket.
4. Disconnect electrical connectors.

5. Li
ft ECM from housing.
6. RHD only: Remove security bracket securing screws.
R
emove brackets.
1. NOTE: A replacement ECM may only be obtained from an
authorised Jaguar dealer and MU ST be ordered against the VIN.
• NOTE: Check condition of ho using seals and replace as
necessary.
Installation is a reversal of the removal procedure.
2. Synchronize ECM, KTM and BPM using PDU.
3. Complete engine set- up using JDS/PDU.