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Jaguar X-Type Sedan and Estate (Wagon). Manual - part 283

Item

Part Number

Description

Vane adjustment solenoid valve

Atmospheric pressure

Vacuum

Adjusting ring

Vanes

Turbine

Vacuum diaphragm unit

ECM

At low engine speeds the ECM actuates the vane adjustment solenoid valve to enable a vacuum to be applied. The vacuum diaphragm unit
moves the adjusting ring so that the vanes are set at a shallow angle. The shallow intake cross section this creates for the stream of
exhaust gas allows the turbocharger boost pressure to build up rapidly and easily at low engine speeds.

Regulation at Moderate Engine Speed

Item

Part Number

Description

Vane adjustment solenoid valve

Atmospheric pressure

Vacuum

Adjusting ring

Vanes

Turbine

Vacuum diaphragm unit

ECM

As the engine speed increases and the quantity of exhaust gas increases as a result, the vane adjustment solenoid valve adjusts the
vacuum level within the vacuum diaphragm unit. The vacuum diaphragm unit moves the adjusting ring so that the vanes are set at a
steeper angle. The steeper angle opens the intake cross section effectively reducing the gas flow and turbine speed while maintaining
constant turbocharger boost pressure.

Regulation at Maximum Engine Speed

Item

Part Number

Description

Vane adjustment solenoid valve

Atmospheric pressure

Vacuum

Adjusting ring

Vanes

Turbine

Vacuum diaphragm unit

ECM

As the engine speed increases the intake cross section in front of the turbocharger turbine is continuously enlarged. The turbine speed and
hence the quantity of the air supplied to the engine, is adjusted to suit the engine speed. This means that the turbocharger boost pressure
remains optimized over all engine speeds.

The maximum position of the turbocharger vanes (maximum opening cross section) is also an emergency position, in the event of an
electrical concern or leak in the vacuum system. This lowers the chance of engine damage due to excessive boost in the event of a
turbocharger control concern.

Published: 26-Jul-2011

Fuel Charging and Controls - Turbocharger - Turbocharger

Diagnosis and Testing

Overview

For information on the operation of the turbocharger:
REFER to:

Turbocharger

(303-04C Fuel Charging and Controls - Turbocharger, Description and Operation).

Inspection and Verification

• W ARNINGS:

The following tests may involve working in close proximity to hot components. Make sure adequate protection is used. Failure to

follow this instruction may result in personal injury.

The turbocharger can continue to rotate after the engine has stopped. Do not attempt to check the turbocharger until one minute has

elapsed since the engine was switched off. Failure to follow this instruction may result in personal injury.

1. Verify the customer concern.

2. Visually inspect for obvious mechanical or electrical faults.

Visual inspection chart

Mechanical

Electrical

Intake air system
Hose(s)/hose connections
Turbocharger
General engine condition.

Circuit(s)
Electrical connections and harnesses
Manifold absolute pressure and temperature (MAPT) sensor
Turbocharger actuator
Engine control module (ECM)

Symptom chart

Symptom

Possible source

Action

Poor performance
(off-boost)

Low/Contaminated
fuel
Restricted intake air
system
General engine
condition
Engine control
module (ECM) failure

Check the fuel level and condition. Draw off approximately 1 ltr (2.11 pints) of fuel and allow
to stand for 1 minute. Check to make sure there is no separation of the fuel indicating water
or other liquid in the fuel. Check the intake air system for restriction. Check the engine
condition, compressions, etc. if there are indications of a mechanical fault. Check for DTCs
indicating a module fault. Refer to the warranty policy and procedures manual if a module is
suspect.

No boost

Electrical
connections and
harnesses
Restricted intake air
system
Charge air cooler
restricted/leaking
Turbocharger
actuator failure
Turbocharger failure
Engine control
module (ECM) failure

Check the electrical connections and harnesses. Check the intake air system for
restriction/leakage. Check the turbocharger actuator and circuit. Refer to the electrical guides.
Check the turbocharger for wear. Disconnect the turbocharger intake and outlet pipework and
turn the turbocharger by hand. Any roughness indicates a fault. Check any up and down
movement in the turbocharger shaft. Excessive movement indicates a fault. If in doubt,
compare the suspect unit with a new turbocharger. Check for DTCs indicating an actuator or
module fault. Refer to the warranty policy and procedures manual if a module is suspect.

No
boost/excessive
noise

Turbocharger failure Disconnect the turbocharger intake and outlet pipework and turn the turbocharger by hand.

Any roughness indicates a fault. Check any up and down movement in the turbocharger shaft.
Excessive movement indicates a fault. If in doubt, compare the suspect unit with a new
turbocharger.

For a complete list of all diagnostic trouble codes that could be logged on this vehicle. REFER to:

Electronic Engine Controls

(303-14B

Electronic Engine Controls - 2.0L Duratorq-TDCi/2.2L Duratorq-TDCi (110kW /150PS) - Puma, Diagnosis and Testing).

Diagnostic Trouble Codes (DTC) Relating to Turbocharger Issues

DTC

Description

P2263 Turbocharger/Supercharger Boost System Performance

This vehicle may not feature all of the components listed.

This DTC may be caused by:

Damaged or disconnected vacuum hose. Check for air leaks at turbocharger. Vanes on the turbocharger sticking closed. Turbocharger
defective.

Fault reported by the rotary electronic actuator.

This DTC may be caused by:

CAN communication BUS fault. Rotary electric actuator. Low battery voltage. Turbocharger defective.

P132A Turbocharger/Supercharger Boost Control A Electrical

Fault reported by the rotary electronic actuator.

This DTC may be caused by:

Rotary electric actuator. Renew the variable geometry turbocharger.

P132B Turbocharger/Supercharger Boost Control A Performance

Fault reported by the rotary electronic actuator.

This DTC may be caused by:

Faulty turbocharger, mechanism may be sticking.

Rotary electric actuator. Renew the variable geometry turbocharger.

P132C Turbocharger/Supercharger Boost Control A Voltage

Fault reported by the rotary electronic actuator.

DTC

Description

This DTC may be caused by:

Low battery voltage. Check the condition of the battery. Check the wiring and the appropriate fuse. High battery voltage. Check the
battery charging system.

P138D Turbocharger/Supercharger Boost Control A Temperature Too High

Fault reported by the rotary electronic actuator.

This DTC may be caused by:

Leaking exhaust system. Engine overheat condition.

Rotary electric actuator. Renew the variable geometry turbocharger.

P179A CAN Engine Control Module (ECM)/Turbocharger Boost Control A Actuator Circuit Malfunction

Fault reported by the rotary electronic actuator or powertrain control module (PCM).

This DTC may be caused by:

Controller area network (CAN) communication BUS fault. Check CAN wiring/CAN Network is functioning. If CAN wiring/CAN Network is
functioning but the vehicle has loss of power, then renew the variable geometry turbocharger.

Diagnostic Procedure

Log any concerns raised by the customer regarding the fault with the vehicle – Discuss with workshop supervisor/receptionist

Check logged DTC - Rectify concern

Check the vehicle Integrated Diagnostic System (IDS) DVD patch file calibration – Update to the latest level

Quick Check List

Listen for unusual mechanical noise and watch for vibration
Listen for a high pitched noise (it can indicate air or gas leaks)
Listen for noise level cycling. It can indicate a restriction in the air cleaner or ducting
Inspect for missing or loose nuts, bolts, clamps and washers
Inspect for loose or damaged intake and exhaust manifolds and their ducting and clamps
Inspect for damaged or restricted oil supply and drain lines
Inspect for cracked or deteriorating turbocharger housings
Inspect for external oil leakage; external deposits (indicates air, oil, exhaust or coolant leakage)
Inspect for a restricted air filter
Check the turbocharger variable vane actuator arm for normal operation, free movement and damage

Point Health Check:

1. Turbocharger Data Plate:

- 1. Check the turbocharger data stamped on the compressor housing. Record assembly number, serial number and turbocharger
type
- 2. Ensure turbocharger type and assembly number are correct for the engine application

2. Compressor/Turbine Wheel (Turbocharger System Trouble Shooting):

WARNING: Ensure wheels have stopped rotating before handling

CAUTION: Never attempt to straighten blades. If any bent blades are detected replace the turbocharger

• NOTE: Root cause of failure should be identified to eliminate repeat failure. Please make reference to section 'Turbocharger
Trouble Shooting'

1. Check for cracked/bent or damaged compressor (impeller) blades - Replace turbocharger if damaged
- 2. Check for cracked/bent or damaged turbine blades - Replace turbocharger if damaged

3. Compressor/Turbine Housing:

• NOTE: Removal of the compressor or turbine housings will invalidate the Warranty

1. Check for foreign objects, damage, or for excessive oil at the compressor housing air inlet and outlet
- 2. Check for foreign objects, damage, or for excessive oil at the turbine housing exhaust inlet and outlet

4. Turbocharger Bearing Clearances:

• NOTE: If there is contact between compressor/turbine wheel and housing - Replace the turbocharger

1. Gently rotate the compressor wheel and check for smooth operation
- 2. Gently hold to one side and rotate the compressor wheel and check for smooth operation

5. Bearing Housing:

• NOTE: Removal of the compressor or turbine housings will invalidate the Warranty

1. Check oil feed and drain port for loose fasteners, adapters or damage to flanges, housing faces or threads which may cause
leakage
- 2. Check for loose or broken turbine and compressor housing fasteners. If mounting flanges are damaged, replace or tighten
(torque to manufacturer's specification)

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