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

							TV ANTENNA
TV Antenna Amplifier
Where a television system is specified there are four
TV antenna elements two in each of the rear side
windows. Each element has an antenna amplifier which
is connected to the TV tuner module by a coaxial cable.
MULTIBAND TELEPHONE
ANTENNA
Multiband Telephone Antenna
The multiband telephone antenna is located in the roof
mounted pod, which is located in the centre of the roof
at the rear of the vehicle and is connected directly to the
Telephone Control Module (TCM) via a single coaxial
cable.
SATELLITE DIGITAL AUDIO RADIO
SYSTEM (SDARS) ANTENNA (NAS
ONLY)
SDARS antenna
The SDARS antenna is located in the roof mounted pod,
which is located in the centre of the roof at the rear of
the vehicle. The SDARS antenna has two connections
to the SDARS tuner, one for satellite transmissions the
other for terrestrial transmissions from repeater stations.
The antenna comprises two antenna elements:
–A printed dipole antenna for receiving satellite
signals
–A printed monopole antenna for receiving terrestrial
signals
The two antennas allow the system to receive SDARS
transmissions in built up areas where signals form
satellites would normally be blocked.
AntennaLesson 2 – Electrical
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							VICS ANTENNAS (Japan only)
VICS Beacon Antenna
The VICS control module uses the rear RH side window
antenna to receive VICS information. The Control
module also uses an infra red beacon antenna located
in the middle on top of the instrument panel adjacent to
the sunlight sensor.
(G421266) Technical Training146
Lesson 2 – ElectricalAntenna 
						

							COMPONENT LOCATIONS
Heater lines1
Auxiliary climate control module2
Air distribution ducts3
Auxiliary climate control assembly4
Auxiliary Climate ControlLesson 2 – Electrical
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							Cool box5
Refrigerant lines6
Rear blower relay7
GENERAL
The auxiliary climate control system provides additional
air conditioning for the second and third row seat
occupants. On some vehicles, a cool box is incorporated
in the tunnel console between the two front seats. The
auxiliary climate control system consists of:
•An auxiliary climate control assembly.
•A refrigerant circuit.
•A heating circuit.
•A distribution system.
•An Auxiliary Climate Control Module (ACCM).
•A cool box.
The Automatic Temperature Control Module (ATCM),
of the main air conditioning system, is also used in the
control of the auxiliary climate control system.
Cabin air is recirculated through the auxiliary climate
control assembly, where the air is temperature regulated
and then directed through the distribution system to
registers in the roof, on the C pillars and on the left side
of the loadspace. The volume, temperature and
distribution of the air from the auxiliary climate control
assembly can be manually controlled by the ACCM or
automatically controlled by the ATCM.
(G421237) Technical Training22
Lesson 2 – ElectricalAuxiliary Climate Control 
						

							AUXILIARY CLIMATE CONTROL ASSEMBLY
Casing1
Distribution door motor2
Blower inlet3
Solenoid valve4
Thermostatic expansion valve5
Evaporator connector block6
Distribution door7
Footwell outlet8
Evaporator temperature sensor9
Blower control module10
Blower11
Evaporator drain tube12
Heater core inlet pipe13
Heater core outlet pipe14
Auxiliary Climate ControlLesson 2 – Electrical
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							Evaporator outlet pipe15
Evaporator inlet pipe16
Heater core17
Temperature blend door motor18
Face level outlet19
The auxiliary climate control assembly is a reheat unit,
which cools the air to a constant value then reheats it
as necessary to produce the required temperature. The
assembly is installed on the left side of the loadspace,
behind the rear quarter panel. A grille in the rear quarter
panel allows air to flow from the loadspace into the
auxiliary climate control assembly.
The auxiliary climate control assembly consists of a
casing, formed from a series of plastic molding, which
contains:
•A blower
•A blower control module
•An evaporator
•A heater core
•A temperature blend door
•A distribution door
•An evaporator temperature sensor.
Refrigerant and coolant lines from the engine
compartment are connected to pipes from the evaporator
and the heater core immediately below the loadspace
floor. Where the pipes, and the evaporator drain tube,
pass through the loadspace floor, the aperture is sealed
by a seal plate.
Internal passages, integrated into the casing of the
auxiliary climate control assembly, guide the air from
the blower through the evaporator and heater core to
the distribution outlets.
The temperature blend door regulates the flow of air
through the heater core to control the temperature of the
air leaving the auxiliary climate control assembly. A
stepper motor installed on the rear of the casing operates
the temperature blend door.
The distribution door regulates the flow of air through
the face level outlet and the foot level outlet. A stepper
motor installed on the top of the casing operates the
distribution door.
The temperature blend stepper motor and the distribution
stepper motor are both connected to a Local Interconnect
(LIN) bus, which also connects the ACCM with the
ATCM. Each stepper motor incorporates a
microprocessor which operates the motor in response
to LIN bus messages from the ACCM. The stepper
motors are powered by a feed from the ATCM, and
share a ground connection with the rear blower control
module.
The ACCM determines the positions of the distribution
and temperature blend doors by using either their closed
or open position as a datum and memorizing the steps
that it drives the individual stepper motors. Each time
the ACCM is activated by the ATCM, it checks the
memorized position of the stepper motors against fixed
values for the current distribution and temperature
settings on the control panel. If there is an error, the
ACCM calibrates the applicable stepper motor, to
re-establish the datums, by driving them fully closed or
open before re-setting them to their nominal selected
position. A calibration run can also be invoked using
T4.
(G421237) Technical Training24
Lesson 2 – ElectricalAuxiliary Climate Control 
						

							Air Flow Through Auxiliary Climate Control Assembly
Temperature blend door1
Auxiliary climate control assembly casing2
Face level outlet3
Distribution door4
Heater core5
Evaporator6
Evaporator drain tube7
Blower8
The blower is in the air inlet of the auxiliary climate
control assembly, and consists of an open hub,
centrifugal fan powered by an electric motor. Operation
of the blower is controlled by the ACCM, using the rear
blower relay in the Battery Junction Box (BJB) and the
blower control module. The blower control module is
installed in the auxiliary climate control assembly
downstream of the blower, where any heat generated
during operation is dissipated by the air flow. A wiring
harness on the auxiliary climate control assembly
connects the blend door motor, distribution door motor,
blower and blower control module to the vehicle wiring.
Blower Control Module
Auxiliary Climate ControlLesson 2 – Electrical
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							When the blower is required, the ACCM energizes the
coil of the rear blower relay. The energized rear blower
relay supplies battery power to the blower motor, which
is connected to ground through the blower control
module. The speed of the blower is controlled by the
blower control module, which regulates the blower
motor voltage in response to a Pulse Width Modulated
(PWM) signal from the ACCM. To vary the blower
motor voltage the ACCM varies the duty cycle of the
PWM signal.
Evaporator Temperature Sensor
The evaporator temperature sensor is a Negative
Temperature Coefficient (NTC) thermistor installed in
the auxiliary climate control assembly on the
downstream side of the evaporator. The evaporator
temperature sensor supplies a temperature signal to the
ACCM.
REFRIGERANT CIRCUIT
Two refrigerant lines, low pressure and high pressure,
connect the evaporator in the auxiliary climate control
assembly to the front A/C refrigerant system. On the
auxiliary climate control assembly, a solenoid valve and
a thermostatic expansion valve control the flow of
refrigerant through the evaporator.
(G421237) Technical Training26
Lesson 2 – ElectricalAuxiliary Climate Control 
						

							Refrigerant Lines
In-line connections1
Auxiliary climate control assembly2
Connections to auxiliary climate control
assembly
3
The refrigerant lines are routed around the left rear
wheel arch and along the LH underside of the vehicle,
and connected to the front A/C refrigerant system at the
rear of the engine compartment. The refrigerant lines
consist of sections of aluminum alloy pipes. All except
the front section of the pipes are insulated with foam
rubber sleeving.
Solenoid Valve
Auxiliary Climate ControlLesson 2 – Electrical
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							The solenoid valve allows the auxiliary climate control
assembly to be isolated from the front A/C refrigerant
system. Operation of the solenoid valve is controlled
by the ACCM switching a ground.
Thermostatic Expansion Valve
Thermostatic expansion valve1
Capillary tube2
Temperature bulb3
The thermostatic expansion valve meters the flow of
refrigerant into the evaporator, to match the heat load
of the air passing through the auxiliary climate control
assembly.
The thermostatic expansion valve is installed in the inlet
line to the evaporator. Liquid refrigerant flows through
the valve to the evaporator. The restriction across the
valve reduces the pressure and temperature of the
refrigerant and changes it to a fine spray, which
improves the evaporation process. Valve opening is
controlled by the pressure in a capillary tube containing
a temperature sensitive fluid. One end of the capillary
tube is connected to a diaphragm housing on the
thermostatic expansion valve, the other end of the
capillary tube is sealed and attached to the refrigerant
outlet line of the evaporator. As the temperature of the
refrigerant leaving the evaporator changes, a
corresponding change of capillary tube pressure and
valve opening are produced. The warmer the refrigerant
leaving the evaporator becomes, the greater the volume
of refrigerant allowed through the valve.
Evaporator
The evaporator is installed in the auxiliary climate
control assembly between the blower and the heater
matrix, to absorb heat from the 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 auxiliary
climate control assembly through the evaporator drain
tube.
HEATING CIRCUIT
Two heater lines, supply and return, connect the heater
core in the auxiliary climate control assembly to the
engine cooling system. The heater lines are routed along
the rear crossmember, around the right rear wheel arch
and along the RH underside of the vehicle. The heater
lines are connected to the engine cooling system at the
rear of the engine compartment. The heater lines consist
of sections of aluminum alloy pipes, insulated with foam
rubber, which are connected together with rubber hose
joints. Quick release fittings connect the heater lines to
the engine cooling system.
(G421237) Technical Training28
Lesson 2 – ElectricalAuxiliary Climate Control