Jaguar XJ (X350). Manual — part 715

circuit low (right hand bank)

VGT actuator circuit:

short circuit to
ground

VGT actuator failure

ECM failure

Refer to the warranty policy

and procedures manual if an

ECM is suspect.

P023800

Variable geometry

turbocharger (VGT) actuator

circuit high (right hand bank)

VGT actuator circuit:

short circuit to
power

VGT actuator failure

ECM failure

For right hand bank VGT

actuator circuit tests, GO to

Pinpoint Test G552276p2.

Refer to the warranty policy

and procedures manual if an

ECM is suspect.

P024000

Variable geometry

turbocharger (VGT) actuator

circuit range/performance

(left hand bank)

VGT actuator circuit:

high resistance

VGT actuator circuit:

short circuit to
ground

VGT actuator circuit:

short circuit to
power

VGT actuator failure

ECM failure

For left hand bank VGT

actuator circuit tests, GO to

Pinpoint Test G552276p3.

Refer to the warranty policy

and procedures manual if an

ECM is suspect.

P024100

Variable geometry

turbocharger (VGT) actuator

circuit low (left hand bank)

VGT actuator circuit:

high resistance

VGT actuator circuit:

short circuit to
ground

VGT actuator failure

ECM failure

For left hand bank VGT

actuator circuit tests, GO to

Pinpoint Test G552276p3.

Refer to the warranty policy

and procedures manual if an

ECM is suspect.

P024200

Variable geometry

turbocharger (VGT) actuator

circuit high (left hand bank)

VGT actuator circuit:

short circuit to
power

VGT actuator failure

ECM failure

For left hand bank VGT

actuator circuit tests, GO to

Pinpoint Test G552276p3.

Refer to the warranty policy

and procedures manual if an

ECM is suspect.

P226300 Turbocharger boost system

performance, manifold

IAT sensor circuit(s):

high resistance,
short circuit to

For IAT, MAP and MAF sensor

tests.

absolute pressure (MAP)

sensor control deviation

ground, short
circuit to power

MAP sensor circuit(s):

high resistance,
short circuit to
ground, short
circuit to power

MAF sensor circuit(s):

high resistance,
short circuit to
ground, short
circuit to power

EGR circuit(s): high

resistance, short
circuit to ground,
short circuit to
power

VGT actuator failure

Turbocharger vanes

stuck/sticking

ECM failure

Electronic Engine Controls For

EGR tests.

Engine Emission Control For

VGT actuator tests. GO to

Pinpoint Test G552276p2.

and GO to Pinpoint Test

G552276p3.

Refer to the warranty policy

and procedures manual if an

ECM is suspect.

P029900

Turbocharger underboost

condition, manifold absolute

pressure (MAP) sensor control

deviation

MAP sensor circuit:

high resistance

MAP sensor circuit:

short circuit to
ground

MAP sensor circuit:

short circuit to
power

MAP sensor failure

Exhaust gas

recirculation (EGR)
fault

Turbocharger fault

ECM failure

For MAP sensor tests.

Electronic Engine Controls For

EGR tests.

Engine Emission Control Check

for DTCs indicating a

turbocharger fault. Refer to

the warranty policy and

procedures manual if an ECM

is suspect.

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Pinpoint Tests

CAUTION: Do not insert any tools into the turbocharger body. Failure to follow this

instruction may result in damage to the vehicle.

CAUTION: When probing connectors to take measurements in the course of the pinpoint

tests, use the adaptor kit, part number 3548-1358-00. Failure to follow this instruction may result

in damage to the vehicle.

NOTE:

A small amount of oil inside the turbocharger body, visible when the hoses are disconnected, is

normal.

NOTE:

A small amount of play in the turbine shaft is normal. If in any doubt, compare with a known

good unit.

NOTE:

When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to

3 decimal places, and with an up-to-date calibration certificate. When testing resistance, always

take the resistance of the DMM leads into account.

NOTE:

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

NOTE:

If DTCs are recorded and a fault is not present when performing the pinpoint tests, an

intermittent concern may be the cause. Always check for loose connections and corroded

terminals.

PINPOINT TEST G552276p1 : CHECK
THE TURBOCHARGER MECHANICAL
CONDITION

G552276t1 : CHECK FOR EXCESSIVE PLAY IN THE TURBOCHARGER SHAFT

1. Disconnect the intake and outlet hoses from the turbocharger. 2. Check that the turbocharger

rotates freely, and without noise. 3. Grip the ends of the turbine shaft at either side of the

turbocharger and assess the play.

Is the play in the shaft excessive? (Compare the play to a known good unit in the event of

uncertainty).

-> Yes

INSTALL a new turbocharger.

Turbocharger LH

Turbocharger RH CLEAR any DTCs, test the vehicle for normal operation.

-> No

CHECK for other sources of noise. Refer to the symptom chart for diagnosing the turbocharger

system for the cause of the lack of boost.

PINPOINT TEST G552276p2 : CHECK
THE ROTARY ELECTRONIC
ACTUATOR CIRCUIT A

G552276t2 : CHECK THE ROTARY ELECTRONIC ACTUATOR GROUND
CIRCUIT FOR HIGH RESISTANCE

1. Rotary Electronic Actuator connector, C40,

Circuit

Pin

(+) pwm motor C40 - 01

(-) pwm motor

C40 - 02

Ground

C40 - 03

ECM feedback

C40 - 04

5volt supply

C40 - 05

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