Jaguar XJ (X350). Manual — part 811

Symptom chart (vehicles without supercharger)

Symptom

Possible cause

Action

Vehicle does not

start/hard starting/poor

performance

Restricted/blocked air intake

Restricted/blocked air cleaner

element

Clear the restriction,

Air Cleaner (19.10.05) Replace the

air cleaner element as necessary,

Air Cleaner Element (19.10.08)

Excessive intake noise

Intake pipe

disconnected/damaged after
the air cleaner

Air cleaner assembly incorrectly

assembled/damaged

Check the intake system and hoses

for correct installation/damage,

Air Cleaner (19.10.05)

Symptom

Possible cause

Action

Lack of

boost

Supercharger drive

belt
broken/slipping

Supercharger fault

supercharger air

intake elbow
fault

Major air leakage

(after the
supercharger)

Check the supercharger and drive belt (see visual inspection).

For supercharger air intake elbow tests, GO to Pinpoint Test

G532443p1.

Check the charge air coolers and pipework (see visual

inspection).

Noise

Supercharger drive

belt slipping

Supercharger fault

Major air leakage

(after the
supercharger)

Check the supercharger and drive belt (see visual inspection).

Remove the supercharger drive belt and recheck for noise. Turn

the supercharger by hand and check for excessive resistance.

Check the supercharger pulley for excessive play. Check the

charge air coolers and pipework (see visual inspection).

DTC index

NOTE:

Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5

digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last

2 digits give extra information read by the manufacturer-approved diagnostic system).

NOTE:

For a full list of DTCs.

Electronic Engine Controls - VIN Range: G45704->G99999

DTC

Description

Possible causes

Action

P010100

MAF circuit

range/performance

Blocked air cleaner

Air intake leak

Engine breather leak

MAF sensor to ECM

sensing circuit:
high resistance,
intermittent
short circuit to
ground

MAF sensor supply

circuit: high
resistance

Clear the restriction,

Air Cleaner (19.10.05) Replace the air

cleaner element as necessary,

Air Cleaner Element (19.10.08) Inspect

the engine breather system,

For MAF sensor tests,

Electronic Engine Controls - VIN Range:

G45704->G99999

P010600

MAP/Barometric

pressure circuit

range/performance

Intake manifold air

leak (loose or
missing
component)

MAP sensor to ECM

circuit(s) fault

MAP sensor failure

Check the intake system and hoses for

correct installation/damage,

Air Cleaner (19.10.05) Replace the air

cleaner element as necessary,

Air Cleaner Element (19.10.08) Check

the intake manifold for correct

installation/damage,

Intake Manifold - VIN Range: G45704-

>G99999 (30.15.01) For MAP sensor

tests,

Electronic Engine Controls - VIN Range:

G45704->G99999 .

P017100

System too lean (right

hand bank)

Air intake leak

between MAF
sensor and
cylinder head

Fuel filter/system

restriction

MAF sensor fault

Check the intake system and hoses for

correct installation/damage,

Air Cleaner (19.10.05) Check the fuel

pressure, check the fuel lines,

Fuel Tank and Lines - 4.2L NA V8 -

AJV8/4.2L SC V8 - AJV8/3.0L NA V6 -

AJ27/3.5L NA V8 - AJV8, VIN Range:

G45704->G99999 Check the exhaust

www.

(low intake air
flow)

Exhaust leak (before

catalyst)

system (before catalyst) for condition

and security,

P017200

System too rich (right

hand bank)

Restricted air filter

MAF sensor fault

(high intake air
flow)

Clear the restriction,

Air Cleaner (19.10.05) Replace the air

cleaner element as necessary,

Air Cleaner Element (19.10.08) For MAF

sensor tests,

Electronic Engine Controls - VIN Range:

G45704->G99999 .

P017400

System too lean (left

hand bank)

Air intake leak

between MAF
sensor and
cylinder head

Fuel filter/system

restriction

MAF sensor fault

(low intake air
flow)

Exhaust leak (before

catalyst)

Check the intake system and hoses for

correct installation/damage,

Air Cleaner (19.10.05) Check the fuel

pressure, check the fuel lines,

Fuel Tank and Lines - 4.2L NA V8 -

AJV8/4.2L SC V8 - AJV8/3.0L NA V6 -

AJ27/3.5L NA V8 - AJV8, VIN Range:

G45704->G99999 Check the exhaust

system (before catalyst) for condition

and security,

P017500

System too rich (left

hand bank)

Restricted air filter

MAF sensor fault

(high intake air
flow)

Clear the restriction,

Air Cleaner (19.10.05) Replace the air

cleaner element as necessary,

Air Cleaner Element (19.10.08) For MAF

sensor tests,

Electronic Engine Controls - VIN Range:

G45704->G99999 .

P050600

Idle air control system

RPM lower than

expected

Restricted air cleaner

element

MAF sensor fault

(high intake air
flow)

Clear the restriction,

Air Cleaner (19.10.05) Replace the air

cleaner element as necessary,

Air Cleaner Element (19.10.08) For MAF

sensor tests,

Electronic Engine Controls - VIN Range:

G45704->G99999 .

P050700

Idle air control system

RPM higher than

expected

Intake air leak

between MAF
sensor and

Check the intake system and hoses for

correct installation/damage,

Air Cleaner (19.10.05) Inspect the

throttle

Intake air leak

between throttle
and engine

Engine crankcase

breather leak

engine breather system,

Pinpoint tests

NOTE:

Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

PINPOINT TEST G532443p1 : CHECK
THE SUPERCHARGER AIR INTAKE
ELBOW

G532443t1 : CHECK THE AIR INTAKE ELBOW VACUUM LINE

1. Check the vacuum connection to the supercharger air intake elbow at both ends. 2. Check the

vacuum line to the supercharger air intake elbow along its length.

Is the vacuum line connected and in good condition?

-> Yes

GO to Pinpoint Test G532443t2.

-> No

CONNECT or replace the vacuum line as necessary. Test the system for normal operation.

G532443t2 : CHECK THE OPERATION OF THE AIR INTAKE ELBOW
ACTUATOR LINKAGE

1. Disconnect the vacuum line from the actuator diaphragm. 2. Connect a suitable hand vacuum

pump to the actuator diaphragm. 3. Apply a vacuum to the actuator diaphragm. 4. Observe the

actuator linkage operation.

Does the actuator linkage operate?

-> Yes

GO to Pinpoint Test G532443t3.

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