Jaguar XJ (X350). Manual — part 755

not fire

d

Ignition system

Fuel system

Harness

CKP sensor

ECM fault

For ignition system circuit tests, GO to

Pinpoint Test G290076p1.

. Check fuel pressure, <<310-01>> For CKP

tests, <<303-14>> Contact dealer technical

support for advice on possible ECM failure.

Engine cranks and fires,

but will not start

Purge valve

Fuel pump

Engine coolant

temperature (ECT)
sensor

Spark plugs

Check for water ingress

into spark plug wells

HT short to ground

(tracking) check rubber
boots for
cracks/damage

Ignition coil failure(s)

Harness

For evaporative emissions components,

<<303-13>> Check fuel pressure, <<310-

01>> For ECT sensor tests, <<303-14>> For

ignition system circuit tests, GO to Pinpoint

Test G290076p1.

.

Difficult to start cold

Check coolant anti-freeze

content

Battery

CKP sensor

EGR valve stuck open

Fuel pump

Engine coolant

temperature (ECT)
sensor

Purge valve

For battery information, <<414-01>> For

CKP sensor tests, <<303-14>> For EGR

system information, <<303-08>> Check fuel

pressure. For ECT sensor tests, <<303-14>>

For evaporative emissions components,

<<303-13>>

Difficult to start hot

Injector leak

Fuel temperature sensor

IAT sensor

MAF sensor

Purge valve

Fuel pump

Ignition system

Engine coolant

temperature (ECT)
sensor

EGR valve stuck open

For fuel injectors, <<303-04>> For fuel

temperature sensor, IAT sensor and MAF

sensor tests, <<303-14>> For evaporative

emissions components, <<303-13>> Check

fuel pressure. For ignition system circuit

tests, GO to Pinpoint Test G290076p1.

. For ECT sensor tests, <<303-14>>

Difficult to start after

hot soak (vehicle

standing after engine

has reached operating

temperature)

Injector leak

Fuel temperature sensor

IAT sensor

MAF sensor

Purge valve

Fuel pump

Ignition system

Engine coolant

temperature (ECT)
sensor

EGR valve stuck open

For fuel injectors, <<303-04>> For fuel

temperature sensor, IAT sensor and MAF

sensor tests, <<303-14>> For evaporative

emissions components, <<303-13>> Check

fuel pressure. For ignition system circuit

tests, GO to Pinpoint Test G290076p1.

. For ECT sensor tests, <<303-14>> For EGR

information, <<303-08>>

Engine stalls soon after

start

Breather system

disconnected/restricte
d

ECM relay

Harness

MAF sensor

Engine coolant

temperature (ECT)

For breather system, <<303-08>> For ECM

relay, MAF sensor and ECT sensor tests,

<<303-14>> For ignition system circuit tests,

GO to Pinpoint Test G290076p1.

. For air filter information, <<303-12>> For

fuel line information, <<310-01>> For fuel

pressure sensor tests, <<303-04>> For

intake system information, <<303-12>>

www.

sensor

Ignition system

Air filter restricted

Fuel lines

Fuel pressure sensor

Air leakage

Engine hesitates/poor

acceleration

Fuel pump

Injector leak

Fuel pressure

Fuel lines

Air leakage

Throttle sensors

Throttle motor

Ignition system

Exhaust gas recirculation

HO2 sensors

Transmission malfunction

Restricted pedal travel

(carpet, etc)

APP sensor

Check fuel pressure, <<310-01>> For fuel

pressure sensor tests, <<303-04>> For fuel

line information, <<310-01>> For intake

system, <<303-12>> For throttle position

sensor and throttle motor tests, <<303-

14>> For ignition system circuit tests, GO to

Pinpoint Test G290076p1.

. For exhaust gas recirculation, <<303-08>>

Check for DTCs relating to HO2 sensors. For

transmission information, <<307-01>>

Check accelerator pedal travel. For APP

sensor tests, <<303-14>>

Engine backfires

Fuel pump

Fuel lines

Air leakage

MAF sensor

HO2 sensors

Ignition system

Check fuel pressure. For fuel line

information, <<310-01>> For intake system,

<<303-12>> For MAF sensor tests, <<303-

14>> Check for DTCs relating to HO2

sensors. For ignition system circuit tests, GO

to Pinpoint Test G290076p1.

. For VCT information, <<303-01>> For APP

sensor tests, <<303-14>>

Sticking VCT hub

APP sensor

Engine surges

Fuel pump

Fuel lines

MAF sensor

Harness

Throttle sensors

Throttle motor

Ignition system

Check fuel pressure. For fuel line

information, <<310-01>> For MAF sensor,

throttle sensor, and throttle motor relay

tests, <<303-14>> For ignition system circuit

tests, GO to Pinpoint Test G290076p1.

.

Engine

detonates/knocks

KS/circuit malfunction

Fuel pump

Fuel lines

Fuel pressure sensor

MAF sensor

HO2 sensors

Air leakage

Sticking VCT hub

BARO sensor malfunction

For KS circuit tests, <<303-14>> Check fuel

pressure. For fuel line information, <<310-

01>> For fuel pressure sensor tests, <<303-

04>> For MAF sensor and HO2 sensor tests,

<<303-14>> For intake system, <<303-12>>

Check DTCs for VCT range/performance

fault. For VCT information, <<303-01>> For

BARO sensor, contact dealer technical

support for advice on possible ECM failure

No throttle response

APP sensor malfunction

Throttle sensors

Throttle motor

For APP sensor, throttle position sensor and

throttle motor relay tests, <<303-14>>

Poor throttle response

APP sensor malfunction

Throttle sensors

Engine coolant

temperature (ECT)
sensor

MAF sensor

For APP sensor, throttle position sensor,

ECT sensor and MAF sensor tests, <<303-

14>> For transmission information, <<307-

01>> For intake system, <<303-12>> For

breather system information, <<303-08>>

www.