Jaguar XJ (X350). Service manual — part 1113
Fuel Tank and Lines - 4.2L NA V8 -
AJV8/4.2L SC V8 - AJV8/3.0L NA V6 -
AJ27/3.5L NA V8 - AJV8, VIN Range:
G45704->G99999
Overview
There are changes to the engine management system (EMS) for 2006 my, the most obvious of which
will be the change to 7-digit diagnostic trouble codes (DTCs) from the familiar 5-digit, and the change
from two fuel pumps for vehicles with supercharger to a single pump.
For additional information on the description and operation of the fuel system.
Fuel Tank and Lines - 2.7L V6 - TdV6
Inspection and Verification
1 . Verify the customer concern.
2 . Visually inspect for obvious signs of mechanical or electrical damage.
Mechanical
Electrical
Fuel leaks
Damaged fuel lines
Damaged push connect fittings
Fuel level
Fuel contamination/grade/quality
Damaged fuel tank filler pipe cap
Damaged fuel tank filler pipe
Fuses
Inertia switch
Loose or corroded electrical connectors
Harnesses
Fuel pump driver module (FPDM)
Rear electronic module (REM)
Fuel pump relay
Engine control module (ECM)
3 . If an obvious cause for an observed or reported symptom is found, correct the cause (if possible)
before proceeding to the next step.
4 . If the cause is not visually evident use the Jaguar approved diagnostic system or a scan tool to
retrieve the fault codes before proceeding to the diagnostic trouble code (DTC) Index.
Symptom Chart
Symptom
Possible source
Action
Engine cranks, but does not
fire
Engine breather system
disconnected/restricted
Ignition system
Fuel system
Harness
Crankshaft position (CKP)
sensor
ECM fault
Check the engine breather system,
Engine Emission Control - VIN Range:
G45704->G99999 For ignition
system,
Engine Ignition - VIN Range: G45704-
>G99999 or
Engine Ignition - VIN Range: G45704-
>G99999 For fuel pressure test, GO
to Pinpoint Test G532449p8.
For CKP tests,
Electronic Engine Controls - VIN
Range: G45704->G99999 or
Electronic Engine Controls - VIN
Range: G45704->G99999 Refer to
the warranty policy and procedures
manual if an ECM is suspect.
Engine cranks and fires, but
will not start
Evaporative emissions purge
valve
Fuel pump
Spark plugs
HT short to ground (tracking)
check rubber boots for
cracks/damage
Ignition coil failure(s)
Harness
For purge valve tests,
Evaporative Emissions - VIN Range:
G45704->G99999 For fuel pressure
test, GO to Pinpoint Test
G532449p8.
For ignition system,
Engine Ignition - VIN Range: G45704-
>G99999 or
Engine Ignition - VIN Range: G45704-
>G99999
Difficult to start cold
Check coolant anti-freeze
content
Battery
CKP sensor
Exhaust gas recirculation
(EGR) valve stuck open
Fuel pump
Evaporative emissions purge
Check engine coolant level and
condition. For battery information,
Battery For CKP sensor tests,
Electronic Engine Controls - VIN
Range: G45704->G99999 or
Electronic Engine Controls - VIN
Range: G45704->G99999 For EGR
system information,
Engine Emission Control - VIN Range:
G45704->G99999 For fuel pressure
test, GO to Pinpoint Test
G532449p8.
www.
valve
For purge valve tests,
Evaporative Emissions - VIN Range:
G45704->G99999
Difficult to start hot
Injector leak
Engine fuel temperature
(EFT) sensor
Intake air temperature (IAT)
sensor
Mass air flow (MAF) sensor
Evaporative emissions purge
valve
Fuel pump
Ignition system
EGR valve stuck open
For fuel injector information,
Fuel Injectors (18.10.02) or
Fuel Injectors (18.10.02) For EFT, IAT
and MAF sensor tests,
Electronic Engine Controls - VIN
Range: G45704->G99999 or
Electronic Engine Controls - VIN
Range: G45704->G99999 For purge
valve tests,
Evaporative Emissions - VIN Range:
G45704->G99999 For fuel pressure
test, GO to Pinpoint Test
G532449p8.
For ignition system,
Engine Ignition - VIN Range: G45704-
>G99999 or
Engine Ignition - VIN Range: G45704-
>G99999 For EGR tests,
Engine Emission Control - VIN Range:
G45704->G99999
Difficult to start after hot
soak (vehicle standing after
engine has reached
operating temperature)
Injector leak
EFT sensor
IAT sensor
MAF sensor
Evaporative emissions purge
valve
Fuel pump
Ignition system
EGR valve stuck open
For fuel injector tests,
Fuel Charging and Controls - VIN
Range: G45704->G99999
Fuel Charging and Controls - VIN
Range: G45704->G99999 For EFT
sensor, IAT sensor and MAF sensor
tests,
Electronic Engine Controls - VIN
Range: G45704->G99999 or
Electronic Engine Controls - VIN
Range: G45704->G99999 For purge
valve tests,
Evaporative Emissions - VIN Range:
G45704->G99999 For fuel pressure
test, GO to Pinpoint Test
G532449p8.
For ignition system,
Engine Ignition - VIN Range: G45704-
>G99999 or
Engine Ignition - VIN Range: G45704-
>G99999 For EGR tests,
Engine Emission Control - VIN Range:
G45704->G99999
Engine stalls soon after
start
Breather system
disconnected/restricted
ECM relay
Harness
MAF sensor
Ignition system
Air filter restricted
Fuel lines
Fuel rail pressure (FRP)
sensor
Air leakage
For breather system information,
Engine Emission Control - VIN Range:
G45704->G99999 For ECM relay and
MAF sensor tests,
Electronic Engine Controls - VIN
Range: G45704->G99999 or
Electronic Engine Controls - VIN
Range: G45704->G99999 For
ignition system,
Engine Ignition - VIN Range: G45704-
>G99999 or
Engine Ignition - VIN Range: G45704-
>G99999 For air filter information,
Intake Air Distribution and Filtering -
VIN Range: G45704->G99999 or
Intake Air Distribution and Filtering -
VIN Range: G45704->G99999 For
fuel line tests, GO to Pinpoint Test
G532449p2.
For FRP sensor tests,
Electronic Engine Controls - VIN
Range: G45704->G99999 or
Electronic Engine Controls - VIN
Range: G45704->G99999 For intake
system information,
Intake Air Distribution and Filtering -
VIN Range: G45704->G99999 or
Intake Air Distribution and Filtering -
VIN Range: G45704->G99999
Engine hesitates/poor
acceleration
Fuel pump
Injector leak
Fuel pressure
Fuel lines
Air leakage
Throttle position (TP) sensors
For fuel pressure test, GO to Pinpoint
Test G532449p8.
For FRP sensor tests,
Electronic Engine Controls - VIN
Range: G45704->G99999 or
Electronic Engine Controls - VIN
Range: G45704->G99999 For fuel
line tests, GO to Pinpoint Test
G532449p2.
For intake system,
Intake Air Distribution and Filtering -
www.
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