Land Rover Body And Paint Air Bag And Safety Belt Rover Manual

							The A/C compressor circulates the refrigerant around
the system by compressing low pressure, low
temperature vapor from the evaporator and discharging
the resultant high pressure, high temperature vapor to
the condenser. The A/C compressors for the different
engine types differ due to their individual installation
requirements, but are otherwise the same.
The A/C compressor is a permanently engaged, variable
displacement unit which is driven by the engine
accessory drive belt. To protect the refrigerant system
from excessive pressure, a pressure relief valve is
installed in the outlet side of the A/C compressor. The
pressure relief valve vents excess pressure into the
engine compartment.
CONDENSER
RH end tank1
Condenser core2
LH end tank3
High pressure line connector block4
Condenser attachment brackets5
Receiver drier pipes6
Receiver drier attachment bracket7
The condenser transfers heat from the refrigerant to the
surrounding air to convert the high pressure vapor from
the compressor into a liquid. The condenser is installed
immediately in front of the radiator. Two brackets on
each end tank of the condenser attach the condenser to
clips on the end tanks of the radiator.
Air ConditioningLesson 2 – Electrical
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							The condenser is classified as a sub-cooling condenser
and consists of a fin and tube heat exchanger core
installed between two end tanks. Divisions in the end
tanks separate the heat exchanger into a four pass upper
(condenser) section and a two pass lower (sub-cooler)
section. A connector block on the left end tank of the
condenser provides connections for the high pressure
lines from the A/C compressor and the evaporator. Two
pipes at the bottom of the right end tank of the condenser
provide connections for the receiver drier.
RECEIVER DRIER
Receiver drier1
Clamp2
Condenser RH end tank3
O-ring seals4
Inlet pipe5
Outlet pipe6
Collar7
Bolt8
The receiver drier removes solid impurities and moisture
from the refrigerant, and provides a reservoir for liquid
refrigerant to accommodate changes of heat load at the
evaporator.
The receiver drier is attached to the two stub pipes on
the right end tank of the condenser. A collar, located on
lands on the stub pipes and secured with a bolt, attaches
the stub pipes to the receiver drier. A clamp secures the
body of the receiver drier to a bracket welded to the
right end tank of the condenser. The inlet and outlet
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							ports of the receiver drier are the same size, so care must
be taken to install the receiver drier the correct way
round on the stub pipes; to assist with installation, the
inlet port is identified with the word IN etched into the
receiver drier.
Refrigerant entering the receiver drier passes through a
filter and a desiccant pack, then collects in the base of
the unit before flowing through the outlet stub pipe back
to the condenser. The desiccant and the filter are
non-serviceable; the complete unit must be replaced
when a change of desiccant is required.
THERMOSTATIC EXPANSION
VALVE
Metering valve1
Housing2
Diaphragm3
Temperature sensitive tube4
Outlet passage from evaporator5
Inlet passage to evaporator6
The thermostatic expansion valve meters the flow of
refrigerant into the evaporator, to match the refrigerant
flow with the heat load of the air passing through the
evaporator.
The thermostatic expansion valve is a block type valve
located behind the heater assembly, and attached to the
inlet and outlet ports of the evaporator. The thermostatic
expansion valve consists of an aluminum housing
containing inlet and outlet passages. A ball and spring
metering valve is installed in the inlet passage and a
temperature sensor is installed in the outlet passage. The
temperature sensor consists of a temperature sensitive
tube connected to a diaphragm. The bottom end of the
temperature sensitive tube acts on the ball of the
metering valve. Pressure on top of the diaphragm is
controlled by evaporator outlet temperature conducted
through the temperature sensitive tube. The bottom of
the diaphragm senses evaporator outlet pressure.
Liquid refrigerant flows through the metering valve into
the evaporator. The restriction across the metering valve
reduces the pressure and temperature of the refrigerant.
The restriction also changes the liquid stream of
refrigerant into a fine spray, to improve the evaporation
process. As the refrigerant passes through the
evaporator, it absorbs heat from the air flowing through
the evaporator. The increase in temperature causes the
refrigerant to vaporize and increase in pressure.
The temperature and pressure of the refrigerant leaving
the evaporator act on the diaphragm and temperature
sensitive tube, which regulate the metering valve
opening and so control the volume of refrigerant flowing
through the evaporator. The warmer the air flowing
through the evaporator, the more heat available to
evaporate refrigerant and thus the greater the volume
of refrigerant allowed through the metering valve.
EVAPORATOR
Air ConditioningLesson 2 – Electrical
17Technical Training (G421234) 
						

							The evaporator is installed in the heater assembly
between the blower and the heater matrix, to absorb
heat from the exterior or recirculated air. Low pressure,
low temperature refrigerant changes from liquid to vapor
in the evaporator, absorbing large quantities of heat as
it changes state.
Most of the moisture in the air passing through the
evaporator condenses into water, which drains out of
the heater and through the floorpan, to the underside of
the vehicle, through two drain tubes.
REFRIGERANT LINES
To maintain similar flow velocities around the system,
the diameter of the refrigerant lines varies to suit the
two pressure/temperature regimes. The larger diameters
are installed in the low pressure/temperature regime and
the smaller diameters are installed in the high
pressure/temperature regime.
Low and high pressure charging connections are
incorporated into the refrigerant lines for system
servicing. Where auxiliary A/C is installed, connections
for the auxiliary refrigerant lines are incorporated near
the engine bulkhead.
Under normal operating conditions, the smaller diameter
pipes (A/C compressor discharge, liquid refrigerant) are
hot to the touch and the larger diameter pipes (A/C
compressor suction, gaseous refrigerant) are cold to the
touch.
SYSTEM OPERATION
To accomplish the transfer of heat, the refrigerant is
circulated around the system, where it passes through
two pressure/temperature regimes. In each of the
pressure/temperature regimes, the refrigerant changes
state, during which process maximum heat absorption
or release occurs. The low pressure/temperature regime
is from the thermostatic expansion valve, through the
evaporator to the compressor; the refrigerant decreases
in pressure and temperature at the thermostatic
expansion valve, then changes state from liquid to vapor
in the evaporator, to absorb heat. The high
pressure/temperature regime is from the compressor,
through the condenser and receiver drier to the
thermostatic expansion valve; the refrigerant increases
in pressure and temperature as it passes through the
compressor, then releases heat and changes state from
vapor to liquid in the condenser.
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							A/C SYSTEM SCHEMATIC
NOTE: A = Refrigerant liquid; B = Refrigerant vapor; C = Air flow
Evaporator1
Thermostatic expansion valve2
High pressure connection with auxiliary climate
control (where fitted)
3
High pressure servicing connection4
Refrigerant pressure sensor5
Cooling fan6
Condenser7
Receiver drier8
A/C compressor9
Low pressure servicing connection10
Air ConditioningLesson 2 – Electrical
19Technical Training (G421234) 
						

							Low pressure connection with auxiliary climate
control (where fitted)
11Blower12
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Lesson 2 – ElectricalAir Conditioning 
						

							Lesson 2 – Electrical
1. c
2. Make sure unit is correctly orientated, i.e in to in.
3. b
4. Improved thermal comfort. High reliability.; Low
fuel consumption.; Light weight.; Improved
driveability.; Engine torque management.;
5. e
6. c
7. b
8. It is cooled by the Peltier Effect. This occurs when a
direct current is passed through a circuit of two
dissimilar conductors, which are connected together at
two junctions; this causes one junction to become cold
and one junction to become hot.
9. An in-vehicle temperature sensor, a sunlight sensor.
Japanese specification vehicles also have a pollution
sensor and a humidity sensor.
10. a
11. b
12. c
13. c
14. MOST
15. terrsetrial
16. d
17. b
18. c
19. 5
20. a
21. c
22. d
23. b
24. Improved visibility when cornering
25. a
26. d
27. 25
28. d
29. GVIF
30. c
31. c
32. c
33. Transceiver control module navigation computer;
Transceiver control module;
Lesson 3 – Body and Paint
1. c
2. the memory control module records the position at
which the stall occurred.
3. b
4. c
5. c
6. d
7. b
8. b
9. a
Technical Training284
Answers to the test questions 
						

							Antenna Amplifier Component Location
FM Antenna1
Suppressor2
TV antenna amplifier3
FM diversity antenna amplifier4
TV antenna amplifier5
FM antenna amplifier6
GPS antenna7
Rear screen mounted antennas8
Telephone and SDARS antennas9
VICS/ TMC antenna amplifier10
TV antenna amplifier11
Suppressor12
VICS antenna amplifier13
Side screen television antennas14
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							TV antenna amplifier15
Screen Antenna Layout
NOTE: A=Hardwired
TV antenna amplifier1
LH Side screen antennas2
RH Side screen antennas3
TV antenna amplifier4
TV tuner module5
Integrated Head Unit (IHU)6
AM/FM diversity antenna amplifier7
TV antenna amplifier8
TV tune module9
FM Diversity tuning amplifier10
Rear screen antennas11
VICS/TMC tuner12
VICS/TMC antenna amplifier13
TV antenna amplifier14
VICS antenna amplifier15
VICS tuner16
The antenna systems fitted to the vehicle comprise:
•AM (glass mounted)
•FM (glass mounted)
•FM diversity (glass mounted, where fitted)
•TV (glass mounted, where fitted)
•Multiband telephone antenna (roof mounted, where
fitted)
•GPS antenna (rear spoiler mounted, where fitted)
AntennaLesson 2 – Electrical
143Technical Training (G421266) 
						

							•SDARS (roof mounted NAS only)
•VICS antenna and beacon antenna (Japan only where
fitted)
FM ANTENNAS
FM Antenna Amplifier
The AM/FM antennas are located in the side and rear
widow. ON vehicles with the low line audio system the
AM/FM antenna is located in the RH rear side screen.
On vehicles with a high line audio systems the system
will be equipped with FM diversity tuning. This system
ensures that the strongest of two signals is used by the
radio system to ensure the best possible FM reception.
The standard AM/FM antenna is screen mounted in the
RH rear side window and is connected to an antenna
amplifier located above the screen. The diversity system
uses the same side window antenna and amplifier but
also uses a rear heated screen element antenna and an
FM antenna amplifier mounted at the top of the rear
screen in the tail gate.
TMC ANTENNA AMPLIFIER
The Traffic Message Channel (TMC) signals are
received through the normal radio signals via the RDS
network. The signals are routed separately form the
radio signals via a separate antenna amplifier located
on the RH rear side window.
GPS ANTENNA
The GPS antenna is located in the RH side of the upper
tailgate mounted spoiler. The GPS antenna is connected
to the navigation computer by a coaxial cable.
(G421266) Technical Training144
Lesson 2 – ElectricalAntenna