Jaguar XJ (X350). Manual — part 677

Fuel injector failure

ECM failure

P155400

Fuel injector circuit

range/performance

cylinder 4

Fuel injector disconnected

Fuel injector harness

wiring: high
resistance, short
circuit to ground,
short circuit to power

Fuel injector failure

ECM failure

For cylinder 4 fuel injector

tests, GO to Pinpoint Test

G552275p11.

Refer to the warranty policy

and procedures manual if an

ECM is suspect.

P155500

Fuel injector circuit

range/performance

cylinder 5

Fuel injector disconnected

Fuel injector harness

wiring: high
resistance, short
circuit to ground,
short circuit to power

Fuel injector failure

ECM failure

For cylinder 5 fuel injector

tests, GO to Pinpoint Test

G552275p12.

Refer to the warranty policy

and procedures manual if an

ECM is suspect.

P155600

Fuel injector circuit

range/performance

cylinder 6

Fuel injector disconnected

Fuel injector harness

wiring: high
resistance, short
circuit to ground,
short circuit to power

Fuel injector failure

ECM failure

For cylinder 6 fuel injector

tests, GO to Pinpoint Test

G552275p13.

Refer to the warranty policy

and procedures manual if an

ECM is suspect.

P228800

Injector control pressure

too high - fuel pressure

control valve (FPCV)

minimum limit reached

Fuel injector control

pressure: too high

FPCV circuit fault

FPCV failure

Fuel pump module circuit:

short circuit to power

Fuel pump module failure

Fuel injection pump failure

For fuel pressure and fuel

pump module circuit tests,

Fuel Tank and Lines - 2.7L

Diesel For FPCV and circuit

tests, GO to Pinpoint Test

G552275p7.

For fuel injection pump,

Fuel Injection Pump

P229000

Injector control pressure

too low - fuel pressure

control valve (FPCV)

maximum limit reached

Fuel injector control

pressure: too low

Fuel line leak

Fuel filter/system

restriction

FPCV circuit fault

FPCV failure

Fuel pump module circuit:

short circuit to ground

Fuel pump module failure

Fuel injection pump failure

For fuel lines, fuel pressure

and fuel pump module circuit

tests,

Fuel Tank and Lines - 2.7L

Diesel For FPCV and circuit

tests, GO to Pinpoint Test

G552275p7.

For fuel injection pump,

Fuel Injection Pump

P229200

Injector control pressure

erratic - fuel pressure

control valve (FPCV)

dynamic

Fuel injector control

pressure: erratic

FPCV circuit fault

FPCV failure

Fuel pump module

circuit(s): high
resistance, short
circuit to ground,
short circuit to power

Fuel pump module failure

Fuel injection pump failure

For fuel lines, fuel pressure

and fuel pump module circuit

tests,

Fuel Tank and Lines - 2.7L

Diesel For FPCV and circuit

tests, GO to Pinpoint Test

G552275p7.

For fuel injection pump,

Fuel Injection Pump

Pinpoint test

WARNING: Wait at least 30 seconds after the engine stops before commencing any repair to

the high pressure fuel injection system. Failure to follow this instruction may result in personal

injury.

WARNING: This procedure involves fuel handling. Be prepared for fuel spillage at all times

and always observe fuel handling precautions. Failure to follow this instruction may result in

personal injury.

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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: 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:

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 DTCs are recorded and a fault is not present when performing the pinpoint tests, an

intermittent concern may be the cause. Always check for loose connections and corroded

terminals.

PINPOINT TEST G552275p1 : CHECK
FOR FUEL SYSTEM LEAKS

G552275t1 : CHECK FOR FUEL SYSTEM LEAKS

1. Start and run the engine for five minutes. 2. Key off. 3. Inspect the fuel lines, pump, etc, in the

engine bay for cracks/damage. 4. Raise and support the vehicle.

Lifting 5. Inspect the fuel lines for cracks/damage. 6. Check the integrity of the joints in the supply

and return lines between the fuel tank and the fuel pump. 7. Carefully check around the fuel pipes,

injectors and pump for evidence of leakage. 8. If there is evidence of a significant leak, clean the

engine and repeat the test.

Is there any evidence of leakage?

-> Yes

RECTIFY the leak as necessary. Test the system for normal operation.

-> No

CHECK for other possible causes for the customer concern.

PINPOINT TEST G552275p2 : CHECK
THE FUEL PUMP MODULE FUNCTION

G552275t2 : CHECK THE FUEL PUMP MODULE FUNCTION

1. After thoroughly cleaning around the connections, disconnect the inlet pipe from the fuel filter. 2.

Position a suitable container beneath the fuel filter inlet pipe to collect fuel. 3. Key on, engine off (the

pump should run for a short period, depending on temperature, etc). 4. Check that fuel is pumped

from the fuel filter inlet pipe.

Is fuel pumped from the fuel filter inlet pipe?

-> Yes

CHECK the drive belt to the fuel injection pump.

Fuel Injection Pump Belt Check for DTCs. Test the system for normal operation.

-> No

CHECK the fuel pump module and circuit,

Fuel Tank and Lines - 2.7L Diesel

PINPOINT TEST G552275p3 : CHECK
FOR CONTAMINATED FUEL

G552275t3 : CHECK FOR UNUSUAL ODOURS FROM THE FUEL FILLER

1. Gather as much information as possible from the owner/driver regarding refuelling practices. 2.

Remove the fuel filler cap and check for unusual odours.

Are there any unusual odours from the fuel filler neck?

-> Yes

DRAIN the fuel tank and refill with fresh fuel. Install a new fuel filter.

Fuel Filter - 2.7L Diesel (19.25.02) Test the vehicle for normal operation.

-> No

GO to Pinpoint Test G552275t4.

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