1994 JAGUAR XJ6 checking oil

Climate Control Systems
SECTION CONTENTS
Subsection Title SRO Page
i to iii ............ Preliminary Pages ................................................................ i to iii
14.1
............. Working Practices .................................................................... 1
Working Practices. General ............................................................ 1 14.1.1 ............
14.1.2. ........... Working Practices. Handling Refrigerant ................................................. 1
14.1.3 ............ Working Practices. Handling Lubricating Oil ............................................. 2
14.1.4
............ Working Practices. System Maintenance ................................................. 2
14.2
............. Climate ControlSystem ............................................................... 3
14.2.1
............ Climate Control System. Description .................................................... 3
14.2.2.
........... Climate Control System. Features ....................................................... 3
14.3
............. ClimateControl Panel ................................................................ 4
14.4
.............
14.4.1 ............ Temperature Control. Coolant Circuit .................................................... 6
14.5 ............. Air Conditioning Control Module ....................................................... 7
14.5.1 ............ Air Conditioning Control Module. Description 7
14.5.2. ........... Air Conditioning Control Module. Interfaces .............................................. 8
14.6
............. Control Module Fault & Condition Self-Analysis .......................................... 9
14.6.1
............ Control Module Fault & Condition Self-Analysis. System Health ............................. 9
14.6.2.
........... Control Module Fault & Condition Self-Analysis. System Protection .......................... 9
14.7
............. Air Distribution ..................................................................... 10
14.8
............. Refrigeration Cycle .................................................................. 12
14.9
............. General System Procedures ........................................................... 13
14.9.1
............ General System Procedures. Leak Test .................................................. 13
14.9.2
............ General System Procedures. Charge Recovery (System Depressurization) .................... 13
14.9.3.
........... General System Procedures. Evacuating the System ....................................... 13
14.9.4.
........... General System Procedures. Adding Lubricating Oil (Compressor Related) ................... 13
14.9.5.
........... General System Procedures. Adding Lubricating Oil (Component Related) ................... 14
14.9.6.
........... General System Procedures. Adding Refrigerant .......................................... 14
14.10
............ Fault Diagnosis ..................................................................... 15
14.10.1
.......... Fault Diagnosis. Introduction .......................................................... 15
14.10.2
.......... FaultDiagnosis. FunctionalCheck ..................................................... 15
14.10.3
14.11
............ Systemself- Test .................................................................... 17
14.1 1.1 ........... System Self- Test. Interrogation Procedure via the Control Panel ............................ 17
14.1 1.2 ........... System Self- Test. Control Panel Fault Code Key ......................................... 17
14.1 1.4 ........... System Self- Test. Panel Communication Check .......................................... 18
14.13
............ System Checking With Manifold Gauge Set ............................................. 20
14.7 3.1 .......... System Checking With Manifold Gauge Set. Evacuating the Gauge Set ...................... 20
14.13.2 .......... System Checking With Manifold Gauge Set. Connecting the Manifold Gauge Set .............. 20
14.13.3
.......... System Checking With Manifold Gauge Set. Stabilizing the System ......................... 20
14.14
............ Pressure / Temperature Graph (High Side / Ambient Temperature) ........................... 21
14.15
............ Pressure / Temperature Graph (Low Side / Evaporator Temperature) ......................... 22
14.16
............ System Pressure Fault Classification ................................................... 23
Temperature
Control
.................................................................. 6
............................................ a
.......... Fault Diagnosis. System Symptoms ..................................................... 15 a
14.1 1.3 ........... System Self- Test. Associated Faults .................................................... 18
14.12
............ Manifold Gauge Set ................................................................. 19
X300 VSM ~ i Issue 1 August 1994

Climate Control Systems
0 14.9 GENERAL SYSTEM PROCEDURES
14.9.1 Leak Test
Faults associated with low refrigerant charge weight and low pressure may be caused by leakage. Leaks traced to
mechanical connections may be caused by torque relaxation or joint face contamination. Evidence of oil around such
areas is an indicator of leakage. When checking for non visible leaks use only
a dedicated HFC 134A electronic analyzer
and apply the probe all round the joint / connection.
Should a leak betraced to a joint,checkthatthefixing issecuredtothecorrecttightening torque before any other action
is taken.
Do not forget to check the compressor shaft seal and evaporator.
CAUTION : Never use a dedicated CFC 12 or naked flame type analyzer.
14.9.2 Charge Recovery (System depressurization)
The process of HFC 134A recovery will depend on the basic characteristics of your chosen recovery/ recycle I recharge
equipment, therefore, follow the manufacturer's instructions carefully.
Remember that compressor oil may be drawn
out of the system by this process, take note of the quantity recovered
so that it may be replaced.
CAUTION: Observe all relevant safety requirements.
Wear suitable eye and skin protection
Do not mix HFC 134A with CFC 12. Do not vent refrigerant directly to atmosphere and always use Jaguar approved recovery I recycle I re- charge equipment.
Take note of the amount of recovered refrigerant, it will indicate the state of the system. 0
14.9.3 Evacuating the System
This process, the removal of unwanted air and moisture, is critical to the correct operation of the air conditioning sys-
tem. The specific procedures will vary depending on the individual characteristics of your chosen recovery I recycle / recharge equipment and must be carried out exactly in accordance with the manufacturers instructions. However,
it is recommended that the initially only the HIGH side valve be opened at the start of the procedure. After a short time a small depression should be seen on the LOW side, at which point the LOW side valve may be opened and the evacu- ation process completed. If a vacuum is not registered on the LOW side it may indicate that the expansion valve is
jammed closed or that the system is blocked. This simple check may save time and effort when the system is re- charged.
Moisture can be highly destructive and may cause internal blockages due to freezing, but more importantly, water sus- pended in the PAG oil will damage the compressor. Once the system has been opened for repairs, or the refrigerant
charge recovered, all traces of moisture MUST be removed before recharging.
14.9.4
The amount of oil drawn out during a recovery procedure will be dependent on the state of the system and the rate
of recovery. The quantity will be approximately 30 to 40 ml; this may vary, and the figure is given only for guidance.
The oil separator vessel in the recovery equipment must be clean and empty
at the start of the process so that the quan- tity of oil which is drawn out may be accurately measured.
Oil may be added by three methods,
1 and 2 being direct into the system and 3 with the compressor off the vehicle;
1. Via the recovery I recycle 1 recharge station.
2. Proprietary oil injector.
Adding Lubricating Oil - Compressor Related
1ynfa: Equipment manufacturer's instructions must be adhered to when using direct oil introduction.
3. Directly into the original, or new unit, because of rectification work to the existing compressor, or the need to fit a new compressor.
Original
From an existing compressor, drain the oil into a measuring cylinder and record the amount. Flush the unit out
with fresh PAG oil and drain thoroughly, Replenish the compressor with the same amount of PAG oil that was
originally drained out and immediately plug all orifices ready for refitting to the vehicle.
X300 VSM 13 Issue 1 August 1994

Climate Control Systems
14.13 SYSTEM CHECKING WITH MANIFOLD GAUGE Sm
14.13.1 Evacuating the Manifold Gauge Set
Attach the centre (service) hose to a vacuum pump and start the pump. Open fully both high anddow valves and allow
the vacuum to remove air and moisture from the manifold set for at least five minutes.
Turn the vacuum pump off and isolate it from the centre service hose but do not open the hose to atmosphere.
CAUTION: It is imperative that the vacuum pump is not subjected to a positive pressure of any degree. Therefore
the pump must be frtted with an isolation valve at the centre (service hose) connection and this valve
must be closed before the pump is switched off. This operation replaces the 'purge' procedure used on
previous systems. Observe the manufacturefs recommendation with regard to vacuum pump oil
changes.
14.13.2 Connecting the Manifold Gauge Set
CAUTION: Only use hoses with connectors which are dedicated to HFC 134A charge ports.
Attachment of the hose quick release connectors to the high and low side system ports is straightfotward, provided
that the high and low valves are closed and the system is NOT operational.
Assessment of system operating efficiency and fault classification may be achieved by using the facilities on your
Re- covery / Recharging / Recycling station, follow the manufacturers instructions implicitly and observe all safety con- siderations.
WARNING: UNDER NO CIRCUMSTANCES SHOULD THE CONNECTIONS BE MADE WITH THE SYSTEM IN
OPERATION OR THE VALVES OPEN. SHOULD THE VALVES BE OPEN AND A VACUUM PUMP OR
REFRIGERANT CONTAINER ATTACHED, AN EXPLOSION COULD OCCUR AS A RESULT OF HIGH
PRESSURE REFRIGERANT BEING FORCED BACK INTO THE VACUUM PUMP
OR CONTAINER.
14.13.3 Stabilizing the System
Accurate test gauge data will only be attained if the system temperatures and pressures are stabilized.
Ensure that equipment and hoses cannot come into contact with engine moving parts or sources of heat.
It is recommended that a free standing air mover is placed in front of the vehicle to provide air flow through the con- denser / cooling system, see illustration below.
Start the engine, allow
it to attain normal working temperature and set at fast idle (typically 1200 to 1500 rpm). Select full air conditioning performance.
With all temperatures and pressures stable, or displaying symptoms of faults; begin relevant test procedures.
Fig.
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Issue 1 August 1994 20 X300 VSM

Steering and Suspension
W: When checking the steering geometry, use the pull-down tools front and rear to set the ride height front and
rear to the following dimensions:
Front ride height
................................................... 153 f 5mm to underside of front
crossbeam
Rear ride height
.................................................... 160 f 5mm to underside of rear
edge of A frame
Front ride height
................................................... 143 f 5mm to underside of front
crossbeam
Rear ride height
.................................................... 160 f 5mm to underside of rear
edge of A frame
U: Sportspack derivatives whose kerb height is below the above figures can have their geometry checked at that
height.
Front Suspension
..............................................................
0
Type Independent front suspension
consisting of double wishbones
with coil springs and separate
dampers and anti
-roll bar.
Dampers
.......................................................... Telescopic, gas pressurised
Caster angle
....................................................... 3,0° to 6,0° and with opposing
wheels within Io of each other
Camberangle
...................................................... 0,3°to-0,80
Front wheel alignment .............................................. Total toe: 5 minutes in f 10 minutes
Rear Suspension
Type .............................................................. Fully independent rear suspension of double wishbone principle with
axle shaft operating as upper
wishbone incorporating coaxial
springs and dampers with optional
rear anti
-roll bar.
Camber angle
(at design ride height):
all vehicles except supercharged ................................. -0,75O f 0,4O
supercharged only -1,6O f 0,4O ..............................................
0 Rear wheel alignment .............................................. Total toe: 15 minutes in f20
Dampers .......................................................... Telescopic, gas pressurised
minutes
Power Assisted Steering
Type .............................................................. ZF
Servotronic speed-sensitive rack
and pinion
Number
of turns lock to lock ........................................ 2,768
Turning circle: (wall to wall)
....................................................... 12,9m (42ft 4in)
(curb to curb) ...................................................... 12,4m (40ft 8in)
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X300 VSM Issue 1 August 1994 AI-95MY 4 ~~~~

General Fitting Instructions
A3.2 GENERAL FITTING INSTRUCTIONS
A3.2.1
Always fit covers to protect the wings before commencing work in the engine compartment. Cover the seats and
carpets, wear clean overalls and wash hands or wear gloves before working inside the car. Avoid spilling hydraulic
fluid, anti
-freeze or battery acid on the paintwork. In the event of spillage, wash off with water immediately. Use poly- thene sheets in the boot to protect carpets. Always use the recommended service tool, or a satisfactory equivalent,
where specified. Protect temporarily exposed screw threads by replacing nuts or fitting caps.
Precautions Against Damage To The Vehicle
A3.2.2 Preparation
Before disassembly, clean the surrounding area as thoroughly as possible. When components have been removed,
blank off any exposed openings using greaseproof paper and masking tape. Immediately seal fuel, oil and hydraulic
lines when separated, using plastic caps or plugs, to prevent loss of fluid and the entry of dirt. Close the open ends
of oilways, exposed by component removal, with tapered hardwood plugs or readily visible plastic plugs. Immediately
a component is removed, place
it in a suitable container; use a separate container for each component and its asso- ciated parts. Before dismantling a component, clean it thoroughly with a recommended cleaning agent: check that the
agent will not damage any of the materials within the component. Clean the bench and obtain marking materials, la-
bels, containers and locking wire before dismantling a component.
A3.2.3 Dismantling
Observe scrupulous cleanliness when dismantling components, particularly when parts of the brake, fuel or hydraulic
system are being worked on. A particle of dirt or a fragment of cloth could cause a dangerous malfunction if trapped in these systems. Clean all tapped holes, crevices, oilways and fluid passages with compressed air.
WRNIFLG: DO NOT PERMIT COMPRESSED AIR TO ENTER AN OPEN WOUND. ALWAYS USE EVE PROTECTION
WHEN USING COMPRESSED AIR.
Ensure that any 'O'-rings used for sealing are correctly refitted or renewed if disturbed. Mark mating parts to ensure
that they are replaced as dismantled. Whenever possible use marking materials which avoid the possibilities of caus- ing distortion or the initiation of cracks, which could occur if a center punch or scriber were used. Wire together mating
parts where necessary to prevent accidental interchange (e.g roller bearing components). Tie labels on to all parts to
be renewed and to parts requiring further inspection before being passed for reassembly.
Place labelled parts and other parts for rebuild
in separate containers.
Do not discard a part which is due for renewal until it has been compared with the new part, to ensure that the correct
part has been obtained.
A3.2.4 Inspection
Before inspecting a component for wear or performing a dimensional check, ensure that it is absolutely clean; a slight
smear of grease can conceal an incipient failure. When a component is to be checked dimensionally against figures
quoted for
it, use the correct equipment (surface plates, micrometers, dial gauges etc.) in serviceable condition. The
use of makeshift equipment can be dangerous. Reject a component if its dimensions are outside the limits quoted,
or if damage is apparent. A part may be refitted if its critical dimension is exactly to the limit size and it is otherwise
satisfactory. Use Plastigauge 12 Type PG-1 for checking bearing surface clearance e.g. big end bearing shell to crank
journal. Instructions for the use of Plastigauge and a scale giving bearing clearances in steps of
0,0025 mm (0.0001
in) are supplied with the package.
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X300 VSM Issue 1 August 1994 2