Jaguar XJ (X350). Service manual — part 690

C100, harness side

Battery

Pin M2

Positive terminal

Pin M3

Positive terminal

Are the resistances greater than 100 Kohms?

-> Yes

An intermittent fault may be present in the wiring harness. Visually check for chaffed wires or other

physical damage to the harness. If no fault is found in the circuit, suspect the following

component(s): - Fuel injector 6 (INJ5) connector - Fuel injector 6 (INJ5) - ECM connector - ECM

-> No

GO to Pinpoint Test G552275t92.

G552275t92 : CHECK WHETHER THE SHORT CIRCUIT TO POWER IS IN THE
HARNESS OR THE FUEL INJECTOR

1. Key off. 2. Disconnect the fuel injector 6 (INJ5) connector, C49. 3. Key on, engine off. 4. Measure

the resistance between:

C100, harness side

Battery

Pin M2

Positive terminal

Pin M3

Positive terminal

Are the resistances greater than 100 Kohms?

-> Yes

An intermittent fault may be present in the wiring harness. Visually check for chaffed wires or other

physical damage to the harness. If no fault is found in the circuit, suspect the following

component(s): - Fuel injector 6 (INJ5)

-> No

REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear any DTCs, test

the system for normal operation.

G552275t93 : CHECK WHETHER THE SHORT CIRCUIT IS IN THE HARNESS
OR THE FUEL INJECTOR

1. Key off. 2. Disconnect the fuel injector 6 (INJ5) connector, C49. 3. Key on, engine off. 4. Measure

the resistance between:

C100, harness side C100, harness side

Pin M2

Pin M3

Is the resistance greater than 100 Kohms?

-> Yes

An intermittent fault may be present in the wiring harness. Visually check for chaffed wires or other

physical damage to the harness. If no fault is found in the circuit, suspect the following

component(s): - Fuel injector 6 (INJ5)

-> No

REPAIR the short circuit. For additional information, refer to the wiring diagrams. Clear any DTCs, test

the system for normal operation.

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Fuel Diverter Rail

Removal

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: Do not smoke or carry lighted tobacco or open flame of any type when working

on or near any fuel related components. Highly flammable mixtures are always present and may

ignite. Failure to follow these instructions 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 these instructions may result in

personal injury.

WARNING: Do not carry out any repairs to the fuel system with the engine running. The fuel

pressure within the high-pressure system can be as high as 1650 bar. Failure to follow this

instruction may result in personal injury.

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

and as dust free as possible. Foreign matter from work on clutches, brakes or from machining or

welding operations can contaminate the fuel system and may result in later malfunction.

CAUTION: Always carry out the cleaning process before carrying out any repairs to the fuel

injection system components. Failure to follow this instruction may result in foreign matter ingress

to the fuel injection system.

CAUTION: Diesel fuel injection equipment is manufactured to very precise tolerances and

fine clearances. It is therefore essential that absolute cleanliness is observed when working with

these components. Always install blanking caps to any open orifices or lines.

CAUTION: Do not remove the fuel rail pressure sensor from the fuel injection diverter rail.

NOTE:

If a new fuel rail pressure sensor is to be installed, a new fuel injection diverter rail and fuel rail

pressure sensor must be installed as an assembly.

1 . Remove the secondary bulkhead center panel.

For additional information, refer to Secondary Bulkhead Center Panel

2

.

Clean around the low pressure fuel inlet and return lines, high-pressure fuel supply lines and

surrounding areas.

For additional information, refer to Fuel Injection Component Cleaning

3 . Disconnect the low-pressure fuel inlet and return lines.

Install suitable blanking caps to the fuel lines and unions.

4 . Remove the injector sound proofing.

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