Jaguar XJ (X350). Service manual — part 626

G206886t6 : CHECK THE INJECTOR GROUND CIRCUIT FOR SHORT CIRCUIT
TO GROUND

1. Measure the resistance between the relevant injector harness electrical connector (IL03 to IL08)

pin 01 and GROUND.

•

Is the resistance less than 10,000 ohms?

-> Yes

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

TEST the system for normal operation.

-> No

Contact dealer technical support for advice on possible ECM failure.

PINPOINT TEST G206886p2 : DTC
P0190, P0192, P0193; FUEL RAIL
PRESSURE (FRP) SENSOR

G206886t7 : CHECK THE FRP SENSOR SIGNAL CIRCUIT FOR HIGH
RESISTANCE

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

Disconnect the FRP sensor electrical connector, IL12. 4. Measure the resistance between IL12 pin 03

(U) and PI01 pin 73 (U).

•

Is the resistance greater than 5 ohms?

-> Yes

REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the

DTC. TEST the system for normal operation.

-> No

GO to Pinpoint Test G206886t8.

G206886t8 : CHECK THE FRP SENSOR SIGNAL CIRCUIT FOR SHORT TO HIGH
VOLTAGE

1. Reconnect the battery negative terminal. 2. Turn the ignition switch to the ON position. 3.

Measure the voltage between IL12 pin 03 (U) and GROUND.

•

Is the voltage greater than 3 volts?

-> Yes

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

TEST the system for normal operation.

-> No

GO to Pinpoint Test G206886t9.

G206886t9 : CHECK THE FRP SENSOR SIGNAL CIRCUIT FOR SHORT TO
GROUND

1. Turn the ignition switch to the OFF position. 2. Measure the resistance between the FRP sensor

electrical connector IL12 pin 03 (U) and GROUND.

•

Is the resistance less than 10,000 ohms?

-> Yes

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

TEST the system for normal operation.

-> No

Recheck the DTCs. Check the sensor supply and ground circuits. <<303-14>>

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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

•

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 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 circuit 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) sensor

•

Mass air flow (MAF) sensor

•

Purge valve

•

Fuel pump

•

Ignition system

•

EGR valve stuck open

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,

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:

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