Jaguar XJ (X350). 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.