2010 JAGUAR XFR air conditioning

Published: 11-May-2011
Accessory Drive - V8 S/C 5.0L Petrol - Accessory Drive - Component Location
Description and Operation
COMPONENT LOCATION










































Item Description A Primary accessory drive B Secondary accessory drive 1 Coolant pump 2 Power steering pump 3 Primary drive belt 4 A/C (air conditioning) compressor 5 Belt tensioner 6 Crankshaft pulley/torsional vibration damper 7 Idler pulley

Published: 11-May-2011
Accessory Drive - V8 S/C 5.0L Petrol - Accessory Drive - Overview
Description and Operation

OVERVIEW

The accessory drive is a belt system powered by a pulley attached to the front of the crankshaft. The crankshaft pulley, which
incorporates a torsional vibration damper, drives two drive belts. An automatic belt tensioner in each belt run maintains the
drive belt at the correct tension. Together with idler pulleys, the belt tensioners also guide the drive belts clear of obstructions
and set the correct 'wrap-around' of the accessory component drive pulleys to ensure a slip-free drive.

PRIMARY DRIVE BELT
The primary drive belt is a six-ribbed poly-V belt that drives the:
Coolant pump
Power steering pump
A/C (air conditioning) compressor
Generator.

SECONDARY DRIVE BELT

The secondary drive belt is an eight-ribbed poly-V belt that drives the SC (supercharger).

BELT TENSIONERS

Each belt tensioner consists of an idler pulley on the end of a spring loaded pivot arm. The pivot arms can be turned manually
for removal and installation of the drive belts.
Each belt tensioners is calibrated to automatically maintain the correct tension in the related drive belt.

Symptom Possible Cause Action Engine stalls on overrun
ECM relay
Throttle position (TP)
sensors
Read DTCs and refer to DTC Index in this
section for ECM relay and TP sensor tests Engine stalls at steady speed
ECM relay
crankshaft position sensor
TP sensors
Read DTCs and refer to DTC Index in this
section for ECM relay, crankshaft position
sensor, and TP sensor tests Engine stalls with speed control
enabled
ECM relay
Read DTCs and refer to DTC Index in this
section for ECM relay tests Engine stalls when manoeuvring
ECM relay
TP sensors
Additional engine loads
(PAS, air conditioning, etc)
Transmission malfunction
CAN malfunction
Read DTCs and refer to DTC Index in this
section for ECM relay, and TP sensor tests
Check for excessive loads being placed on
the engine from PAS, air conditioning
systems etc.
Refer to the workshop manual or
transmission troubleshooting guide for
transmission system tests.
Refer to the relevant section of the
workshop manual and the electrical wiring
diagrams to perform CAN network tests. Poor driveability Engine hesitates/poor acceleration
Fuel pressure, fuel pump,
fuel lines
Injector leak
Air leakage
Electronic engine controls
Ignition system
EGR valve stuck
Transmission malfunction
Restricted pedal travel
(carpet, etc)
For fuel system tests refer to the relevant
section of the workshop manual
Carry out fuel injector leak tests, install new
injectors as necessary.
Check for leakage from air intake system
Read DTCs and refer to DTC Index in this
section for electronic engine control tests
For ignition system tests refer to the
relevant section of the workshop manual
Refer to the relevant section of the
workshop manual and check the Exhaust Gas
Recirculation (EGR) valve and associated
hoses and connections.
Refer to the workshop manual or
transmission troubleshooting guide for
transmission system tests.
Ensure accelerator pedal is free from
restriction Engine backfires
Fuel pump, fuel lines
Air leakage
Electronic engine controls
Ignition system
Sticking variable camshaft
timing (VCT) hub
For fuel system tests refer to the relevant
section of the workshop manual
Check for leakage from air intake system
Read DTCs and refer to DTC Index in this
section for electronic engine control tests
For ignition system tests refer to the
relevant section of the workshop manual
Read DTCs and refer to DTC Index in this
section for VCT system tests Engine surges
Fuel pump, fuel lines
Electronic engine controls
Ignition system
For fuel system tests refer to the relevant
section of the workshop manual
Read DTCs and refer to DTC Index in this
section for electronic engine control tests
For ignition system tests refer to the
relevant section of the workshop manual Engine detonates/knocks
Electronic engine controls
Fuel pump, fuel lines, fuel
quality
Air leakage
Sticking VCT hub
Read DTCs and refer to DTC Index in this
section for electronic engine control tests
For fuel system tests refer to the relevant
section of the workshop manual
Check for leakage from air intake system
Read DTCs and refer to DTC Index in this
section for VCT system tests www.JagDocs.com

Climate Control System - General Information -
Lubricants, Fluids, Sealers and Adhesives

NOTE: NAS vehicles. Published: 29-Jan-2014

Description Specification Air conditioning (A/C) refrigerant R-1234yf A/C compressor oil SPA2
NOTE: ROW vehicles.

Description Specification Air conditioning (A/C) refrigerant R-134a A/C compressor oil SPA2
NOTE: EU vehicles.

Description Specification Air conditioning (A/C) refrigerant R-1234yf A/C compressor oil SPA2 Capacities
Description Grammes A/C refrigerant - all engine variants 700 Refrigerant Oil Adding Capacities

NOTE: Rotate the A/C compressor shaft at least 6 to 8 turns when draining the refrigerant oil.

Item Milliliters A/C condenser core and desiccant bag Add 25ml oil A/C evaporator Add 30ml oil A/C compressor
1. Drain old A/C compressor. With drain plug removed and ports uncapped, rotate
shaft to remove A/C compressor oil and measure the amount of oil captured. 2. Drain
new A/C compressor into a clean vessel. With drain plug removed and ports
uncapped, rotate shaft to remove oil. Then add back a quantity of the new oil that is
identical to the quantity of oil removed from the old A/C compressor. However, if this quantity is less than 30ml, then make it up to 30ml. A/C lines - if air conditioning has been operational. Add 5ml oil per A/C line A/C system after flushing - with new compressor installed No oil should be used- new oil in new compressor is sufficient A/C system after flushing - without a
new compressor installed - remaining
A/C compressor oil is to be drained.
Compressor and expansion valve must
not be flushed (removed from the circuit) Add 80ml oil A/C compressor drain plug Torque 12Nm www.JagDocs.com

Published: 11-Jul-2014
Climate Control System - General Information - Climate Control System
Diagnosis and Testing

Principles of Operation

For a detailed description of the Climate Control System, refer to the relevant Description and Operation sections in the
Workshop Manual. REFER to:

Air Distribution and Filtering (412-01 Climate Control, Description and Operation), Air Distribution and Filtering (412-01 Climate Control, Description and Operation), Air Distribution and Filtering (412-01 Climate Control, Description and Operation), Heating and Ventilation (412-01 Climate Control, Description and Operation), Heating and Ventilation (412-01 Climate Control, Description and Operation), Heating and Ventilation (412-01 Climate Control, Description and Operation), Air Conditioning (412-01 Climate Control, Description and Operation), Air Conditioning (412-01 Climate Control, Description and Operation), Air Conditioning (412-01 Climate Control, Description and Operation), Control Components (412-01 Climate Control, Description and Operation), Control Components (412-01 Climate Control, Description and Operation), Control Components (412-01 Climate Control, Description and Operation), Electric Booster Heater (412-02 Auxiliary Climate Control, Description and Operation), Electric Booster Heater (412-02 Auxiliary Climate Control, Description and Operation), Electric Booster Heater (412-02 Auxiliary Climate Control, Description and Operation).
Inspection and Verification


WARNING: Servicing must be carried out by personnel familiar with both vehicle system and the charging and testing
equipment. All operations must be carried out in a well ventilated area away from open flame and heat sources.


CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does not
guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor vehicle.


NOTE: Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.
1. Verify the customer concern

2. Visually inspect for obvious signs of damage and system integrity

Visual Inspection
Mechanical Electrical
Coolant level
Hose(s)
Coolant pump
Control flap(s)
Duct(s)
Vent(s)
Cabin air filter
Drive belt
Air conditioning compressor
Thermostatic expansion valve
Evaporator
Receiver drier
Air conditioning condenser
Refrigerant pipes Auxiliary
drive belt
Fuel fired booster heater
Fuel fired booster heater fuel pump
Fuel fired booster heater fuel pipes
Fuse(s)
Wiring harness
Electrical connectors
Blower
Air conditioning compressor
Electric cooling fan
Automatic Temperature Control Module (ATCM)
Refrigerant pressure sensor
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to
the next step

4. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart, alternatively check for
Diagnostic Trouble Codes (DTCs) and refer to the DTC Index

5. Check DDW for open campaigns. Refer to the corresponding bulletins and SSMs which may be valid for the specific
customer complaint and carry out the recommendations as required

Symptom Chart

Symptom Possible Causes Action Air conditioning performance poor or
inoperative
Refrigerant undercharged
Refrigerant overcharged
Thermostatic expansion valve
faulty
Receiver drier restricted
Water in refrigerant
GO to Pinpoint Test A. Air conditioning operates briefly and
then switches off
Electric cooling fan inoperative
Air conditioning condenser
airflow obstructed
Test the operation of the electric cooling
fan
Check the air conditioning condenser for
external obstructions Pinpoint Tests

PINPOINT TEST A : PRELIMINARY TESTS TEST CONDITIONS DETAILS/RESULTS/ACTIONS A1: PRELIMINARY TEST 1 NOTES:


This test is performed with the engine not running.
Normal pressure for a correctly charged and switched off system is approximately 4.5 bar on both gauges (system
equalised). 1 Close the valves on the air conditioning station 2 Connect the air conditioning station to the vehicle charging ports 3 Check the pressure values Is a pressure registered on both gauges? Yes
GO to Pinpoint Test B. No
GO to Pinpoint Test D.
PINPOINT TEST B : FUNCTIONALITY TESTS TEST CONDITIONS DETAILS/RESULTS/ACTIONS B1: FUNCTIONALITY TEST 1 NOTES:


Normal pressures for a correctly charged and working system are 1.0 bar to 2.0 bar (low) and 11.0 bar to 15.0 bar (high).
Normal temperature (measured at the center air vent) for a correctly charged and working system is -7°C to -2°C when
ambient temperature is 20°C. 1 Close the valves on the air conditioning station 2 Connect the air conditioning station to the vehicle charging ports 3 Open all doors and the tailgate 4 Start the engine 5 Set the temperature to the lowest setting (all zones) 6 Set the fan speed to maximum 7 Set the recirculate switch to off 8 Insert a temperature probe into the centre air vent 9 Raise engine speed to 1500rpm and maintain this speed for 5 minutes 10 Check the temperature value 11 Check the pressure values Are the pressure readings stable and in the green 'normal' region of the gauge? Yes
Air conditioning system operating normally No
Air conditioning system fault present. GO to Pinpoint Test C.
PINPOINT TEST C : GAUGE TESTS

TEST
CONDITIONS DETAILS/RESULTS/ACTIONS C1: GAUGE TEST 1
NOTE: This test is performed with the engine running and the air conditioning set to on. 1 Check the pressure values Did the gauges register a change in pressure when the air conditioning was switched on? Yes
GO to C2. No
Using the manufacturer approved diagnostic system, check the Automatic Temperature Control Module (ATCM) for related DTCs and refer to the relevant DTC index C2: GAUGE TEST 2
NOTE: This test is performed with the engine running and the air conditioning set to on. 1 Check the pressure values Are the pressure gauge readings fluctuating? Yes
Moisture present in the air conditioning system. Recover the refrigerant. Install a new receiver drier.
Refer to the relevant section of the workshop manual and evacuate and recharge the air conditioning
system. GO to Pinpoint Test B. No
GO to C3. C3: GAUGE TEST 3 NOTES:


This test is performed with the engine running and the air conditioning set to on.
Normal pressures for a correctly charged and working system are 1.0 bar to 2.0 bar (low) and 11.0 bar to 15.0 bar (high). 1 Check the pressure values Are the pressure gauge readings too low? Yes
GO to C4. No
GO to C6. C4: GAUGE TEST 4
NOTE: This test is performed with the engine not running. 1 Stop the engine 2 Using the manufacturer approved refrigerant leak detector, check for a refrigerant leak Was a refrigerant leak detected? Yes
Refer to the relevant section of the workshop manual and recover the refrigerant. Repair as necessary.
Evacuate and recharge the air conditioning system. GO to Pinpoint Test B. No
GO to C5. C5: GAUGE TEST 5
NOTE: This test is performed with the engine not running. 1 Refer to the relevant section of the workshop manual and recover the refrigerant Was the weight of the recovered refrigerant less than specified for the air conditioning system? Yes
Refer to the relevant section of the workshop manual and evacuate and recharge the air conditioning
system. GO to Pinpoint Test B. No
Install a new receiver drier. Refer to the relevant section of the workshop manual and evacuate and recharge the air conditioning system. GO to Pinpoint Test B. C6: GAUGE TEST 6 NOTES:


This test is performed with the engine running and the air conditioning set to on.
Normal pressures for a correctly charged and working system are 1.0 bar to 2.0 bar (low) and 11.0 bar to 15.0 bar (high).

1 Check the pressure values Are the pressure gauge readings too high? Yes
GO to C7. No
Test inconclusive. GO to Pinpoint Test B. C7: GAUGE TEST 7
NOTE: This test is performed with the engine not running. 1 Stop the engine 2 Refer to the relevant section of the workshop manual and recover the refrigerant Was the weight of the recovered refrigerant more than specified for the air conditioning system? Yes
Refer to the relevant section of the workshop manual and evacuate and recharge the air conditioning
system. GO to Pinpoint Test B. No
Install a new thermal expansion valve. Refer to the relevant section of the workshop manual and
evacuate and recharge the air conditioning system. GO to Pinpoint Test B.
PINPOINT TEST D : NITROGEN LEAK TESTS TEST
CONDITIONS DETAILS/RESULTS/ACTIONS D1: NITROGEN LEAK TEST
CAUTION: When charging the system with nitrogen, the pressure should be regulated to 7.0 bar.
NOTE: This test is performed with the engine not running. 1 Charge the air conditioning system with nitrogen 2 Isolate the nitrogen supply 3 Monitor the pressure gauge and check for leaks Has the source of the leak been identified?
Yes
Rectify the leak as necessary. Install a new receiver drier. Refer to the relevant section of the workshop
manual and evacuate and recharge the air conditioning system. GO to Pinpoint Test B. No
Refer to the relevant section of the workshop manual and evacuate and recharge the air conditioning system. GO to Pinpoint Test B.
DTC Index

For a list of Diagnostic Trouble Codes (DTCs) that could be logged on this vehicle, please refer to Section 100-00.
REFER to: Diagnostic Trouble Code (DTC) Index - DTC: Climate Control Module (HVAC) (100-00 General Information, Description and Operation).