Jaguar XJ (X350). Service manual — part 856

P04612F

Fuel level sensor A circuit

range/performance - signal

erratic

Fuel level sensor to rear

electronic module (REM)
circuits; intermittent
short circuit or high
resistance

Fuel level sensor failure

REM fault (incorrect fuel level

data)

For fuel level sensor

circuit tests,

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

P046200

Fuel level sensor A circuit

low input

Fuel level sensor to rear

electronic module (REM)
circuits; intermittent
short circuit to ground or
high resistance

Fuel level sensor failure

REM fault (incorrect fuel level

data)

For fuel level sensor

circuit tests,

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

P046300

Fuel level sensor A circuit

high input

Fuel level sensor to rear

electronic module (REM)
circuits; intermittent
short circuit to power

Fuel level sensor failure

REM fault (incorrect fuel level

data)

For fuel level sensor

circuit tests,

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

P048023 Fan 1 control circuit low

Electric fan control circuit:

short circuit to ground

Electric fan control circuit:

high resistance

For cooling fan circuit

tests, GO to Pinpoint Test

G531330p19.

P048024 Fan 1 control circuit high

Electric fan control circuit:

short circuit to battery

For cooling fan circuit

tests, GO to Pinpoint Test

G531330p19.

P048309 Fan rationality check

Cooling fan difficult to turn

Fan/Motor damaged

Clear any obstruction,

replace the fan as

necessary.

P048316 Fan rationality check

Fan control module reports

battery voltage less than
9 volts

Check the battery

condition. Check the

charging system and fan

circuits.

P048317 Fan rationality check

Fan control module reports

battery voltage greater
than 18 volts

Check the charging

system and fan circuits.

P048397 Fan rationality check

Cooling fan jammed

Clear any obstruction,

replace the fan as

necessary.

P050082

Vehicle speed sensor

malfunction vehicle speed

invalid signal received over

CAN

Vehicle speed: invalid signal

received over CAN

Check for ABS DTCs.

P050086

Vehicle speed sensor

malfunction vehicle speed

invalid signal received over

CAN

Vehicle speed: invalid signal

received over CAN

Check for TCM DTCs.

P050162

Vehicle speed sensor A

range/performance - signal

plausibility failure

Vehicle speed: range

performance

Check for ABS/TCM DTCs.

P050400 Brake switch A/B correlation

The brake pressure reading

does not agree with the
brake light switch value

Anti-Lock Control -

Stability Assist - VIN

Range: G45704->G99999

P050401 Brake switch A/B correlation

Brake switch high fault: Brake

lights stuck on Gearshift
interlock inoperative
Speed control inoperative

Brake switch low fault: Brake

lights inoperative
Gearshift stuck in Park
Reduced engine braking

For brake switch and

circuit tests, GO to

Pinpoint Test

G531330p25.

P050600

Idle air control system RPM

lower than expected

Air intake restriction

Accessory drive overload

(defective/seized
component)

Check the air intake

system.

Intake Air Distribution and

Filtering - VIN Range:

G45704->G99999 Check

the accessory drive belt

and components.

Accessory Drive Belt - 3.0L

NA V6 - AJ27, VIN Range:

G45704->G99999

www.

(12.10.40)

P050624

Idle control system RPM

lower than expected cold

start emission strategy ISC

system lower than expected

Air intake restriction

Accessory drive overload

(defective/seized
component)

Check the air intake

system.

Intake Air Distribution and

Filtering - VIN Range:

G45704->G99999 Check

the accessory drive belt

and components.

Accessory Drive Belt - 3.0L

NA V6 - AJ27, VIN Range:

G45704->G99999

(12.10.40)

P050700

Idle air control system RPM

higher than expected

Intake air leak between MAF

sensor and throttle

Intake air leak between

throttle and engine

Engine crankcase breather

leak

Check the air intake

system,

Intake Air Distribution and

Filtering - VIN Range:

G45704->G99999 Inspect

the engine breather

system,

Engine Emission Control -

VIN Range: G45704-

>G99999

P050723

Idle control system RPM

higher than expected cold

start emission strategy ISC

system higher than

expected

Intake air leak between MAF

sensor and throttle

Intake air leak between

throttle and engine

Engine crankcase breather

leak

Check the air intake

system,

Intake Air Distribution and

Filtering - VIN Range:

G45704->G99999 Inspect

the engine breather

system,

Engine Emission Control -

VIN Range: G45704-

>G99999

P050B84

Cold start ignition timing

performance

Cold start emission reduction

strategy engine spark
timing too retarded

Check for engine ignition

related codes.

Engine Ignition - VIN

Range: G45704->G99999

P050B85

Cold start ignition timing

performance

Cold start emission reduction

strategy engine spark
timing too advanced

Check for engine ignition

related codes.

Engine Ignition - VIN

Range: G45704->G99999

P05120C

Starter request circuit -

circuit voltage above

threshold

Starter relay coil to

ECM/ignition switch
circuit: short circuit to
power

Ignition switch failure

For starter request circuit

tests, GO to Pinpoint Test

G531330p27.

P05120E

Starter request circuit -

circuit voltage below

threshold

Starter relay coil to

ECM/ignition switch
circuit: short circuit to
ground

Starter relay coil to

ECM/ignition switch
circuit: high resistance

Ignition switch failure

For starter request circuit

tests, GO to Pinpoint Test

G531330p27.

P051300 Incorrect immobilizer key

Security key invalid

Programme keys using the

Jaguar approved

diagnostic system.

P053200

Air conditioning (A/C)

refrigerant pressure sensor

A circuit low input

A/C refrigerant pressure

sensor circuit low input

For A/C pressure sensor

tests, GO to Pinpoint Test

G531330p35.

P053300

A/C refrigerant pressure

sensor A circuit high input

A/C Refrigerant pressure

sensor circuit high input

For A/C pressure sensor

tests, GO to Pinpoint Test

G531330p35.

P056013 System voltage

Battery back-up malfunction

For battery back-up tests,

GO to Pinpoint Test

G531330p20.

P056100 System voltage unstable

System voltage comparison

For FRP sensor tests, GO

to Pinpoint Test

G531330p21.

For MAP sensor tests, GO

to Pinpoint Test

G531330p33.

For TP sensor tests, GO to

Pinpoint Test G531330p4.

and GO to Pinpoint Test

G531330p5.

P056200 System voltage low

ECM to sensors sensor supply For FRP sensor tests, GO

www.