Jaguar XJ (X350). Manual — part 641

-> No

GO to Pinpoint Test G290117t12.

G290117t12 : CHECK THE INJECTOR SUPPLY VOLTAGE

1. Turn the ignition switch to the ON position. 2. Disconnect the relevant injector harness electrical

connector (PI32 to PI39). 3. Measure the voltage between the relevant injector harness electrical

connector (PI32 to PI39) pin 02 and GROUND.

Is the voltage less than 10 Volts?

-> Yes

REPAIR the circuit between the relevant injector harness electrical connector (PI32 to PI39) pin 02

and battery. This circuit includes the front power distribution fuse box, fuse 13, and the EMS control

relay. For additional information, refer to the wiring diagrams. CLEAR the DTC. TEST the system for

normal operation.

-> No

GO to Pinpoint Test G290117t13.

G290117t13 : CHECK THE INJECTOR GROUND CIRCUIT

1. Turn the ignition switch to the OFF position. 2. Disconnect the battery negative terminal. 3.

Disconnect the ECM electrical connector PI01. 4. Measure the resistance between the relevant

injector harness electrical connector (PI32 to PI39) pin 001 and the ECM electrical connector PI01,

pins as follows:

Injector Cyl 1, PI32 pin 01 (BG) and PI01 pin 120 (BG).

Injector Cyl 2, PI36 pin 01 (BR) and PI01 pin 115 (BR).

Injector Cyl 3, PI33 pin 01 (BK) and PI01 pin 114 (BK).

Injector Cyl 4, PI37 pin 01 (BO) and PI01 pin 119 (BO).

Injector Cyl 5, PI34 pin 01 (BG) and PI01 pin 113 (BG).

Injector Cyl 6, PI38 pin 01 (U) and PI01 pin 118 (U).

Injector Cyl 7, PI35 pin 01 (BW) and PI01 pin 117 (BW).

Injector Cyl 8, PI39 pin 01 (UY) and PI01 pin 112 (UY).

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the circuit between the relevant injector harness electrical connector pin 01 and the engine

control module electrical connector. For additional information, refer to wiring diagrams. CLEAR the

DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G290117t14.

G290117t14 : CHECK THE INJECTOR GROUND CIRCUIT FOR SHORT CIRCUIT
TO BATTERY

1. Reconnect the battery negative terminal. 2. Measure the voltage between the relevant injector

harness electrical connector (PI32 to PI39) pin 01 and GROUND.

Is the voltage greater than 3 volts?

-> Yes

REPAIR the short circuit. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST

the system for normal operation.

-> No

GO to Pinpoint Test G290117t15.

G290117t15 : CHECK THE INJECTOR GROUND CIRCUIT FOR SHORT CIRCUIT
TO GROUND

1. Measure the resistance between the relevant injector harness electrical connector (PI32 to PI39)

pin 01 and GROUND.

Is the resistance less than 10,000 ohms?

-> Yes

REPAIR the short circuit. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST

the system for normal operation.

-> No

Contact dealer technical support for advice on possible ECM failure.

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Fuel Charging and Controls - 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.

Refer to the DTC index in this section for guidance on how to use these codes with the Jaguar

approved diagnostic system or a scan tool.

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

Throttle body

Damaged fuel tank filler pipe cap

Damaged fuel tank filler pipe

Fuses

Inertia switch

Loose or corroded electrical connectors

Harnesses

Sensor(s)

Engine control module (ECM)

3 . If an obvious cause for an observed or reported concern 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

Check the engine breather system,

Engine Emission Control - VIN Range:

G45704->G99999 For ignition

Ignition system

Fuel system

Harness

Crankshaft position (CKP)

sensor

ECM fault

system tests,

Engine Ignition - VIN Range: G45704-

>G99999 Check the fuel pressure,

Fuel Tank and Lines - 3.0L/3.5L/4.2L,

VIN Range: G45704->G99999 For

CKP tests,

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 Check the fuel

pressure,

Fuel Tank and Lines - 3.0L/3.5L/4.2L,

VIN Range: G45704->G99999 For

ignition system tests,

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

Purge valve

Check the engine coolant level and

condition. For battery information,

Battery For CKP sensor tests,

Electronic Engine Controls - VIN

Range: G45704->G99999 For EGR

system information,

Engine Emission Control - VIN Range:

G45704->G99999 Check the fuel

pressure,

Fuel Tank and Lines - 3.0L/3.5L/4.2L,

VIN Range: G45704->G99999 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)

For fuel injector information,

Fuel Injectors (18.10.02) For EFT, IAT

and MAF sensor tests,

Electronic Engine Controls - VIN

Range: G45704->G99999 For purge

valve tests,

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