Jaguar XJ (X350). Service manual — part 656

CAUTION: The fuel pipes between the injectors and the rail must be discarded after each

use, and new pipes installed. Failure to follow this instruction may result in damage to the vehicle.

CAUTION: It is essential that absolute cleanliness is observed when working with these

components. Always install blanking plugs to any open orifices or lines. Failure to follow this

instruction may result in damage to the vehicle.

CAUTION: Make sure that the workshop area in which the vehicle is being worked on is as

clean and dust-free as possible. Areas in which work on clutches, brakes or where welding or

machining are carried out are not suitable in view of the risk of contamination to the fuel system.

Failure to follow this instruction may result in damage to the vehicle.

CAUTION: Make sure that any protective clothing worn is clean and made from lint-free

non-flocking material. Failure to follow this instruction may result in damage to the vehicle.

CAUTION: Make sure that any protective gloves worn are new and are of the non-powdered

latex type. Failure to follow this instruction may result in damage to the vehicle.

CAUTION: Make sure that clean, non-plated tools are used. Clean tools using a new brush

that will not lose it's bristles and fresh cleaning fluid prior to starting work on the vehicle. Failure

to follow this instruction may result in damage to the vehicle.

CAUTION: Use a steel-topped work bench and cover it with clean, lint-free, non-flocking

material. Failure to follow this instruction may result in damage to the vehicle.

CAUTION: When probing connectors to take measurements in the course of the pinpoint

tests, use the adaptor kit, part number 3548-1358-00. Failure to follow this instruction may result

in damage to the vehicle.

NOTE:

This section contains references to Parameter Identifiers (PIDs). Where the Jaguar approved

diagnostic system is not available, a scantool may be used to access these PIDs, all of which give

information, and some of which can be used to both read information and to activate

components. The format of the information may vary, depending on the tool used.

NOTE:

When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to

3 decimal places, and with an up-to-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 routines involving pinpoint tests.

NOTE:

If diagnostic trouble codes (DTCs) are recorded and the symptom is not present when

performing the pinpoint tests, an intermittent concern may be the cause. Always check for loose

connections and corroded terminals.

1 . Verify the customer concern.

2 . Confirm which, if any, warning lights and/or messages were displayed on the instrument cluster.

3 . Visually inspect for obvious signs of mechanical or electrical damage.

Mechanical

Electrical

Fuel level

Contaminated fuel

Fuel supply line(s)

Glow plug indicator

Inertia fuel shutoff (IFS) switch

Fuel pump module

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Fuel return line(s)

High-pressure fuel supply line(s)

Fuel tank filler pipe

Fuel leak(s)

Fuel tank

Fuel filler cap

Fuel filter

Push connect fittings

Fuel rail

Fuel injection pump

Exhaust gas recirculation (EGR) system

Sensor(s)

Engine control module (ECM)

Fuel volume control valve (FVCV)

Fuel pressure control valve (FPCV)

Fuel rail pressure (FRP) sensor

Fuel temperature sensor

Fuel injector(s)

EGR system

4 . If an obvious cause for an observed or reported concern is found, correct the cause (if possible)

before proceeding to the next step.

5 . 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 DTC index, or the symptom chart if no DTCs are set.

Symptom Chart

Symptom

Possible source

Action

Engine cranks, but

does not start

IFS switch

Low/contaminated fuel

Air ingress

Low pressure circuit fault

Fuel pump module fault

Blocked fuel filter

FVCV blocked/contaminated

FPCV blocked/contaminated

Fuel injection pump failure

Check that the inertia switch has not tripped.

Check the fuel level/condition, GO to Pinpoint

Test G552275p3.

Check the low pressure circuit for

leaks/damage,

Fuel Tank and Lines - 2.7L Diesel Check the

fuel pump module operation, GO to Pinpoint

Test G552275p2.

Check the fuel filter, GO to Pinpoint Test

G552275p4.

Check the FVCV and FPCV, GO to Pinpoint

Test G552275p5.

GO to Pinpoint Test G552275p7.

Check the fuel injection pump,

Fuel Injection Pump For CKP sensor cicuit

Crankshaft position (CKP)

sensor

ECM fault

tests,

Electronic Engine Controls Refer to the

warranty policy and procedures manual if an

ECM is suspect.

Difficult to start

Low/Contaminated fuel

Fuel pump module fault

Air ingress

Low pressure circuit fault

Blocked fuel filter

FVCV blocked/contaminated

FPCV blocked/contaminated

Low pressure circuit fault

EGR valve(s) fault

Check the fuel level/condition, GO to Pinpoint

Test G552275p3.

Check the fuel pump module operation, GO to

Pinpoint Test G552275p2.

Check the low pressure circuit for

leaks/damage,

Fuel Tank and Lines - 2.7L Diesel Check the

fuel filter, GO to Pinpoint Test G552275p4.

Check the FVCV and FPCV, GO to Pinpoint

Test G552275p5.

GO to Pinpoint Test G552275p7.

For EGR tests,

Engine Emission Control

Rough idle

Low/Contaminated fuel

Air ingress

Low pressure circuit fault

Blocked fuel filter

FVCV blocked/contaminated

FPCV blocked/contaminated

EGR valve(s) fault

Check the fuel level/condition, GO to Pinpoint

Test G552275p3.

Check the low pressure circuit for

leaks/damage,

Fuel Tank and Lines - 2.7L Diesel Check the

fuel filter, GO to Pinpoint Test G552275p4.

Check the FVCV and FPCV, GO to Pinpoint

Test G552275p5.

GO to Pinpoint Test G552275p7.

For EGR tests,

Engine Emission Control

Lack of power

when accelerating

Air intake circuit fault

Catalyst converter blocked

Low fuel pressure

EGR valve(s) fault

Turbocharger(s) fault

Check the air intake circuit,

Intake Air Distribution and Filtering Check for

a blocked catalytic converter,

Exhaust System Check the fuel pressure PID,

GO to Pinpoint Test G552275p6.

For EGR tests,

Engine Emission Control For turbocharger

tests,

Turbocharger

Engine stops/stalls

Low/Contaminated fuel

Check the fuel level/condition, GO to Pinpoint

Test G552275p3.

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