warning MERCEDES-BENZ SPRINTER 2006 Service Manual

(6) Remove the tape or plugs from the condenser
inlet port and the discharge line fitting.
(7) Lubricate a new rubber O-ring seal with clean
refrigerant oil and install it on the discharge line fit-
ting.
(8) Connect the discharge line fitting to the con-
denser inlet port.
(9) Install the nut that secures the discharge line
fitting to the condenser. Tighten the nut to 33 N´m
(24 ft. lbs.).
(10) Install the grille (Refer to 23 - BODY/EXTE-
RIOR/GRILLE - INSTALLATION).
(11) Evacuate the refrigerant system. (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING -
STANDARD PROCEDURE - REFRIGERANT SYS-
TEM EVACUATE)
(12) Charge the refrigerant system. (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING -
STANDARD PROCEDURE - REFRIGERANT SYS-
TEM CHARGE)
(13) Reconnect the negative battery cable.
A/CEVAPORATOR
DESCRIPTION
The A/C evaporator for the heating-A/C system is
located within the HVAC housing, behind the instru-
ment panel (Fig. 8). The A/C evaporator is positioned
within the HVAC housing so that all air entering the
housing must pass over the evaporator fins before it
is distributed through the heating-A/C system ducts
and outlets. However, air passing over the evaporator
fins will only be conditioned when the A/C compres-
sor is engaged and circulating refrigerant through
the A/C evaporator.
The A/C evaporator tubes are connected and sealed
to the A/C expansion valve by use of rubber O-rings
and a tapping block.
The A/C evaporator is serviced by removing and
disassembling the HVAC housing.
OPERATION
Refrigerant enters the evaporator from the expan-
sion valve as a low-temperature, low-pressure liquid.
As air flows over the fins of the evaporator, the
humidity in the air condenses on the fins, and the
heat from the air is absorbed by the refrigerant. Heat
absorption causes the refrigerant to boil and vapor-
ize. The refrigerant becomes a low-pressure gas
before it leaves the evaporator.
The evaporator cannot be repaired and, if faulty or
damaged, it must be replaced.
REMOVAL
WARNING: To avoid personal injury or death, on
vehicles equipped with airbags, disable the supple-
mental restraint system before attempting any
steering wheel, steering column, airbag, seat belt
tensioner, impact sensor, or instrument panel com-
ponent diagnosis or service. Disconnect and isolate
the battery negative (ground) cable, then wait two
minutes for the system capacitor to discharge
before performing further diagnosis or service. This
is the only sure way to disable the supplemental
restraint system. Failure to take the proper precau-
tions could result in accidental airbag deployment.
Fig. 8 Front A/C Evaporator
1 - A/C EVAPORATOR
2 - EVAPORATOR TUBES
3 - TAPPING BLOCK
24 - 72 PLUMBINGVA

WARNING: Refer to the applicable warnings and
cautions for this system before performing the fol-
lowing operation (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - WARNINGS) and (Refer
to 24 - HEATING & AIR CONDITIONING/PLUMBING -
CAUTIONS). Failure to follow the warnings and cau-
tions could result in possible personal injury or
death.
(1) Remove the HVAC housing (Refer to 24 -
HEATING & AIR CONDITIONING/DISTRIBUTION/
HVAC HOUSING - REMOVAL).
(2) Disassemble the HVAC housing to access the
A/C evaporator (Refer to 24 - HEATING & AIR CON-
DITIONING/DISTRIBUTION/HVAC HOUSING -
DISASSEMBLY).
(3) Lift the A/C evaporator out of the lower half of
the HVAC housing (Fig. 9).
INSTALLATION
NOTE: If the A/C evaporator is being replaced, add
60 milliliters (2 fluid ounces) of refrigerant oil to the
refrigerant system. Use only refrigerant oil of thetype recommended for the A/C compressor in the
vehicle.
(1) Install the A/C evaporator into the lower half of
the HVAC housing.
(2) Assemble the HVAC housing (Refer to 24 -
HEATING & AIR CONDITIONING/DISTRIBUTION/
HVAC HOUSING - ASSEMBLY).
(3) Install the HVAC housing (Refer to 24 - HEAT-
ING & AIR CONDITIONING/DISTRIBUTION/HVAC
HOUSING - INSTALLATION).
A / C EXPANSION VALVE
DESCRIPTION
The A/C expansion valve controls the amount of
refrigerant entering the A/C evaporator and is of a
thermostatic expansion valve (TXV) design (Fig. 10).
The A/C expansion valve consists of an aluminum
H-valve type body with an integral thermal sensor.
The A/C expansion valve is located at the dash
panel between the A/C refrigerant lines and the A/C
evaporator.
OPERATION
High-pressure, high temperature liquid refrigerant
from the liquid line passes through the expansion
valve orifice, converting it into a low-pressure, low-
temperature mixture of liquid and gas before it
enters the A/C evaporator. A thermal sensor in the
A/C expansion valve monitors the temperature of the
refrigerant leaving the A/C evaporator and adjusts
the orifice size at the evaporator inlet to allow the
proper amount of refrigerant into the A/C evaporator
Fig. 9 HVAC Housing
1 - SCREW (12)
2 - UPPER HOUSING
3 - A/C EVAPORATOR
4 - EVAPORATOR O-RING SEAL (2)
5 - EVAPORATOR GASKET
6 - VENTILATION HOUSING GASKET
7 - LOWER HOUSING
8 - WIRING HARNESS
9 - BOLT (3)
10 - HEATER CORE
11 - HEATER CORE TUBE ASSEMBLY
12 - HEATER CORE TUBE GASKET
13 - HEATER CORE TUBE O-RING SEAL (2)
Fig. 10 Front A/C Expansion Valve
1 - A/C EXPANSION VALVE
2 - THERMAL SENSOR
VAPLUMBING 24 - 73

in order to meet vehicle cooling requirements. Con-
trolling the refrigerant flow through the A/C evapo-
rator ensures that none of the refrigerant leaving the
evaporator is still in a liquid state, which could cause
damage to the A/C compressor.
The A/C expansion valve is factory calibrated and
cannot be adjusted or repaired and, if faulty or dam-
aged, it must be replaced.
DIAGNOSIS AND TESTING
A / C EXPANSION VALVE
The A/C expansion valve is located on the engine
side of the dash panel near the shock tower.
The A/C expansion valve can fail in three different
positions (open, closed or restricted).
In an Open Position: this will result in a noisy A/C
compressor or no cooling. The cause can be broken
spring, broken ball or excessive moisture in the A/C
system. If the spring or ball are found to be defective,
replace the A/C expansion valve. If excessive mois-
ture is found in the A/C system, recycle the refriger-
ant.
In a Closed Position: There will be low suction
pressure and no cooling. This may be caused by a
failed power dome or excessive moisture in the A/C
system. If the power dome on the A/C expansion
valve is found to be defective replace the A/C expan-
sion valve. If excessive moisture is found recycle the
refrigerant.
A Restricted Orifice: There will be low suction
pressure and no cooling. This may be caused by
debris in the refrigerant system. If debris is believed
to be the cause, recycle the refrigerant and replace
the A/C expansion valve and the receiver-drier.
REMOVAL
WARNING: Refer to the applicable warnings and
cautions for this system before performing the fol-
lowing operation (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - WARNINGS) and (Refer
to 24 - HEATING & AIR CONDITIONING/PLUMBING -
CAUTIONS). Failure to follow the warnings and cau-
tions could result in possible personal injury or
death.
(1) Recover the refrigerant from the A/C system
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING - STANDARD PROCEDURE - REFRIG-
ERANT SYSTEM RECOVERY).
(2) Disconnect and isolate the negative battery
cable.
(3) Remove the nut that secures the suction and
liquid line fittings to the stud on the A/C expansion
valve (Fig. 11).(4) Disconnect the suction and liquid lines from
the expansion valve.
(5) Remove the seals from the suction and liquid
line fitting and discard.
(6) Install plugs in, or tape over the opened liquid
and suction line fittings and both expansion valve
ports.
(7) Remove the two bolts that secure the expan-
sion valve to the evaporator tube tapping plate.
(8) Remove the expansion valve from the evapora-
tor tube tapping plate.
(9) Remove the seals from the evaporator inlet and
outlet tube fittings and discard.
(10) Install plugs in, or tape over the opened evap-
orator inlet and outlet tube fittings and both expan-
sion valve ports.
INSTALLATION
(1) Remove the tape or plugs from the tapping
plate evaporator inlet and outlet tube fittings and
both ports on the back of the A/C expansion valve.
(2) Lubricate new rubber O-ring seals with clean
refrigerant oil and install them on the tapping plate
evaporator inlet and outlet tube fittings.
(3) Position the A/C expansion valve onto the tap-
ping plate evaporator inlet and outlet tube fittings.
Fig. 11 A/C Expansion Valve
1 - EVAPORATOR TUBE TAPPING PLATE
2 - O-RING SEAL (2)
3 - A/C EXPANSION VALVE
4 - BOLT (2)
5 - A/C SUCTION LINE
6 - NUT
7 - A/C LIQUID LINE
8 - O-RING SEAL (2)
24 - 74 PLUMBINGVA

INSTALLATION
(1) Install the electric coolant pump and mounting
bracket onto the body studs.
(2) Install the two bracket retaining nuts. Tighten
the nuts to 5 N´m (45 in. lbs.).
(3) Using a twisting motion gently install both
hoses onto the electric coolant pump.
(4) Tighten both hose clamps securely.
(5) Connect the wire harness connector to the elec-
tric coolant pump.
(6) Reconnect the negative battery cable.
(7) Fill the engine cooling system (Refer to 7 -
COOLING/ENGINE/COOLANT - STANDARD PRO-
CEDURE - COOLING SYSTEM FILL).
HEATER CORE
DESCRIPTION
The heater core is mounted into the HVAC hous-
ing, located behind the instrument panel (Fig. 14).
The heater core is a heat exchanger made of rows of
tubes and fins. The heater core tubes are attached to
the heater core by using O-ring seals and bolts.
The heater core is serviced by removing and disas-
sembling the HVAC housing.
OPERATION
Engine coolant is circulated through the heater
hoses to the heater core whenever the heater water
valve is cycled open by the ATC A/C-heater control.
As the coolant flows through the heater core, heat
removed from the engine is transferred to the heater
core fins and tubes. Air directed through the heater
core picks up the heat from the heater core fins. The
heater water valve controls the heater output air
temperature by controlling the amount of heated
engine coolant flowing through the heater core. The
blower motor speed controls the volume of air flowing
through the HVAC housing.
The heater core cannot be repaired and, if faulty or
damaged, it must be replaced.
REMOVAL
WARNING: To avoid personal injury or death, on
vehicles equipped with airbags, disable the supple-
mental restraint system before attempting any
steering wheel, steering column, airbag, seat belt
tensioner, impact sensor, or instrument panel com-
ponent diagnosis or service. Disconnect and isolate
the battery negative (ground) cable, then wait two
minutes for the system capacitor to discharge
before performing further diagnosis or service. This
is the only sure way to disable the supplemental
restraint system. Failure to take the proper precau-
tions could result in accidental airbag deployment.
Fig. 13 Electric Coolant Pump
1 - HEATER HOSE
2 - HOSE CLAMP (2)
3 - HEATER HOSE
4 - ELECTRIC COOLANT PUMP
5 - WIRE HARNESS CONNECTOR
6 - NUT (2)
Fig. 14 Front Heater Core
1 - HEATER CORE
2 - BOLT (3)
3 - HEATER CORE TUBES
4 - O-RING SEALS
24 - 76 PLUMBINGVA

WARNING: Refer to the applicable warnings and
cautions for this system before performing the fol-
lowing operation (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - WARNINGS) and (Refer
to 24 - HEATING & AIR CONDITIONING/PLUMBING -
CAUTIONS). Failure to follow the warnings and cau-
tions could result in possible personal injury or
death.
(1) Remove the heater housing (Refer to 24 -
HEATING & AIR CONDITIONING/DISTRIBUTION/
HVAC HOUSING - REMOVAL).
(2) Disassemble the HVAC housing to access the
heater core (Refer to 24 - HEATING & AIR CONDI-
TIONING/DISTRIBUTION/HVAC HOUSING - DIS-
ASSEMBLY).
(3) Lift the heater core out of the lower half of the
HVACr housing (Fig. 15).
(4) If necessary, remove the three heater core tube
retaining bolts and the heater core tube assembly
from the heater core.
(5) Remove the heater core tube seals and discard
as required.INSTALLATION
(1) If the heater core tube assembly was removed
from the heater core, lubricate two new rubber
O-ring seals with clean engine coolant and install
them onto the heater core fitting.
(2) If required, connect the heater core tube
assembly to the heater core and install the three
retaining bolts. Tighten the bolts to 5 N´m (45 in.
lbs.).
(3) Install the heater core into the bottom half of
the HVAC housing.
(4) Assemble the HVAC housing (Refer to 24 -
HEATING & AIR CONDITIONING/DISTRIBUTION/
HVAC HOUSING - ASSEMBLY).
NOTE: If the heater core is being replaced, flush the
cooling system (Refer to 7 - COOLING - STANDARD
PROCEDURE - COOLING SYSTEM CLEANING/RE-
VERSE FLUSHING).
(5) Install the HVAC housing (Refer to 24 - HEAT-
ING & AIR CONDITIONING/DISTRIBUTION/HVAC
HOUSING - INSTALLATION).
LIQUID LINE
REMOVAL
WARNING: Refer to the applicable warnings and
cautions for this system before performing the fol-
lowing operation (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - WARNINGS) and (Refer
to 24 - HEATING & AIR CONDITIONING/PLUMBING -
CAUTIONS). Failure to follow the warnings and cau-
tions could result in possible personal injury or
death.
NOTE: The A/C liquid line is serviced in two sec-
tions. The front section connects between the A/C
condenser and the receiver/drier and includes the
high side service port and the A/C pressure sensor
on the fitting for the receiver/drier. The rear section
connects between the receiver/drier and the A/C
expansion valve.
FRONT SECTION
(1) Recover the refrigerant from the refrigerant
system (Refer to 24 - HEATING & AIR CONDITION-
ING/PLUMBING - STANDARD PROCEDURE -
REFRIGERANT SYSTEM RECOVERY).
(2) Disconnect and isolate they negative batter
cable.
(3) Remove the grille (Refer to 23 - BODY/EXTE-
RIOR/GRILLE - REMOVAL).
Fig. 15 HVAC Housing
1 - SCREW (12)
2 - UPPER HOUSING
3 - A/C EVAPORATOR
4 - EVAPORATOR O-RING SEAL (2)
5 - EVAPORATOR GASKET
6 - VENTILATION HOUSING GASKET
7 - LOWER HOUSING
8 - WIRING HARNESS
9 - BOLT (3)
10 - HEATER CORE
11 - HEATER CORE TUBE ASSEMBLY
12 - HEATER CORE TUBE GASKET
13 - HEATER CORE TUBE O-RING SEAL (2)
VAPLUMBING 24 - 77

The receiver/drier cannot be repaired. If the receiv-
er/drier is faulty or damaged, or if an internal failure
of the A/C compressor has occurred, the receiver/drier
must be replaced.
REMOVAL
WARNING: Refer to the applicable warnings and
cautions for this system before performing the fol-
lowing operation (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - WARNINGS) and (Refer
to 24 - HEATING & AIR CONDITIONING/PLUMBING -
CAUTIONS). Failure to follow the warnings and cau-
tions could result in possible personal injury or
death.
(1) Recover the refrigerant from the refrigerant
system (Refer to 24 - HEATING & AIR CONDITION-
ING/PLUMBING - STANDARD PROCEDURE -
REFRIGERANT SYSTEM RECOVERY).
(2) Remove the bolts that secure the front and rear
sections of the A/C liquid line to the top of the receiv-
er/drier (Fig. 18).
(3) Disconnect the liquid line fittings from the
receiver/drier and remove and discard the O-ring
seals.
(4) Install a plug in, or tape over the opened liquid
line fittings and the receiver/drier ports.
(5) Loosen the clamp that secures the receiver/
drier to the mounting bracket.
(6) Remove the receiver/drier from the engine com-
partment.
INSTALLATION
NOTE: If the receiver/drier is being replaced, add 30
milliliters (1 fluid ounce) of refrigerant oil to the
refrigerant system. Use only refrigerant oil of the
type recommended for the A/C compressor in the
vehicle.
(1) Position the receiver/drier onto the mounting
bracket on the front left strut tower.
(2) Tighten the clamp that secures the receiver/
drier to the mounting bracket.
(3) Remove the tape or plugs from the liquid line
fittings and the receiver/drier ports.
(4) Lubricate new rubber O-ring seals with clean
refrigerant oil and install them on the liquid line fit-
tings.
(5) Connect the front and rear sections of the liq-
uid line to the receiver/drier.
(6) Install the bolts that secures the liquid line fit-
tings to the receiver/drier. Tighten the bolts to 7 N´m
(62 in. lbs.).
(7) Evacuate the refrigerant system (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING -
STANDARD PROCEDURE - REFRIGERANT SYS-
TEM EVACUATE).
(8) Charge the refrigerant system (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING -
STANDARD PROCEDURE - REFRIGERANT SYS-
TEM CHARGE).
REFRIGERANT
DESCRIPTION
The refrigerant used in this air conditioning sys-
tem is a HydroFluoroCarbon (HFC), type R-134a.
Unlike R-12, which is a ChloroFluoroCarbon (CFC),
R-134a refrigerant does not contain ozone-depleting
chlorine. R-134a refrigerant is a non-toxic, non-flam-
mable, clear, and colorless liquefied gas.
Even though R-134a does not contain chlorine, it
must be reclaimed and recycled just like CFC-type
refrigerants. This is because R-134a is a greenhouse
gas and can contribute to global warming.
OPERATION
R-134a refrigerant is not compatible with R-12
refrigerant in an air conditioning system. Even a
small amount of R-12 added to an R-134a refrigerant
system will cause compressor failure, refrigerant oil
sludge or poor air conditioning system performance.
In addition, the PolyAlkylene Glycol (PAG) synthetic
refrigerant oils used in an R-134a refrigerant system
are not compatible with the mineral-based refriger-
ant oils used in an R-12 refrigerant system.
R-134a refrigerant system service ports, service
tool couplers and refrigerant dispensing bottles have
Fig. 18 Receiver/Drier
1 - RECEIVER/DRIER
2 - A/C LIQUID LINE (REAR SECTION)
3 - A/C PRESSURE TRANSDUCER
4 - A/C LIQUID LINE (FRONT SECTION)
5 - CLAMP
24 - 80 PLUMBINGVA

all been designed with unique fittings to ensure that
an R-134a system is not accidentally contaminated
with the wrong refrigerant (R-12). There are also
labels posted in the engine compartment of the vehi-
cle and on the compressor identifying to service tech-
nicians that the air conditioning system is equipped
with R-134a.
REFRIGERANT OIL
DESCRIPTION
The refrigerant oil used in R-134a refrigerant sys-
tems is a synthetic-based, PolyAlkylene Glycol (PAG),
wax-free lubricant. Mineral-based R-12 refrigerant
oils are not compatible with PAG oils, and should
never be introduced to an R-134a refrigerant system.
There are different PAG oils available, and each
contains a different additive package. The A/C com-
pressors for this vehicle are designed to use an ND-8
PAG refrigerant oil. Use only the refrigerant oil of
this type to service the refrigerant system.
OPERATION
After performing any refrigerant recovery or recy-
cling operation, always replenish the refrigerant sys-
tem with the same amount of the recommended
refrigerant oil as was removed. Too little refrigerant
oil can cause compressor damage, and too much can
reduce air conditioning system performance.
PAG refrigerant oil is much more hygroscopic than
mineral oil, and will absorb any moisture it comes
into contact with, even moisture in the air. The PAG
oil container should always be kept tightly capped
until it is ready to be used. After use, recap the oil
container immediately to prevent moisture contami-
nation.
STANDARD PROCEDURE
REFRIGERANT OIL LEVEL
When an A/C system is assembled at the factory,
all components except the compressor are refrigerant
oil free. After the refrigerant system has been
charged and operated, the refrigerant oil in the com-
pressor is dispersed throughout the refrigerant sys-
tem. The receiver-drier, evaporator, condenser, and
compressor will each retain a significant amount of
the needed refrigerant oil.
It is important to have the correct amount of oil in
the refrigerant system. This ensures proper lubrica-
tion of the A/C compressor. Too little oil will result in
damage to the A/C compressor. Too much oil will
reduce the cooling capacity of the A/C system.
It will not be necessary to check the oil level in the
A/C compressor or to add oil, unless there has been
an oil loss. An oil loss may occur due to a rupture orleak from a refrigerant line, a connector fitting, a
component, or a component seal. If a leak occurs, add
30 milliliters (1 fluid ounce) of refrigerant oil to the
refrigerant system after the repair has been made.
Refrigerant oil loss will be evident at the leak point
by the presence of a wet, shiny surface around the
leak.
Refrigerant oil must be added when a receiver/
drier, A/C evaporator, or A/C condenser are replaced.
See the Refrigerant Oil Capacities chart. When an
A/C compressor is replaced, the refrigerant oil must
be drained from the old compressor and measured.
Drain all of the refrigerant oil from the new compres-
sor, then fill the new compressor with the same
amount of refrigerant oil that was drained out of the
old compressor.
REFRIGERANT OIL CAPACITIES
Component ml fl oz
Total A/C System Fill 410 13.9
Receiver/Drier 30 1.0
A/C Condenser 30 1.0
A/C Evaporator 60 2.0
A/C CompressorDrain and measure the oil
from the old compressor -
see text.
SUCTION LINE
REMOVAL
WARNING: Refer to the applicable warnings and
cautions for this system before performing the fol-
lowing operation (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - WARNINGS) and (Refer
to 24 - HEATING & AIR CONDITIONING/PLUMBING -
CAUTIONS). Failure to follow the warnings and cau-
tions could result in possible personal injury or
death.
(1) Recover the refrigerant system. (Refer to 24 -
HEATING & AIR CONDITIONING/PLUMBING -
STANDARD PROCEDURE - REFRIGERANT SYS-
TEM RECOVERY)
(2) Disconnect and isolate the negative battery
cable.
(3) Remove the routing clip retaining nut and dis-
engage the metal routing clip from the A/C suction
line.
(4) Disengage the plastic routing clip located near
the A/C expansion valve from the A/C suction line.
(5) Remove the nut that secures the A/C suction
and liquid lines to the stud on the A/C expansion
valve (Fig. 19).
VAPLUMBING 24 - 81

(3) Disconnect the condenser fan wire harness
from the condenser fan suppression filter (Fig. 22).
(4) Loosen the four bolts that secure the rear A/C
condenser fan to the top of the rear A/C condenser
housing.
(5) Rotate the rear A/C condenser fan counter-
clockwise and remove the fan from the top of the rear
A/C condenser housing.
INSTALLATION
(1) Position the rear A/C condenser fan to the top
of the rear A/C condenser housing.
(2) Rotate the rear A/C condenser fan clockwise to
engage the fan to the four retaining bolts. Tighten
the bolts to 12 N´m (106 in. lbs.).
(3) Connect the condenser fan wire harness to the
rear condenser fan suppression filter.
(4) Reconnect the negative battery cable.
(5) Install the cover onto the rear A/C condenser
housing (Refer to 24 - HEATING & AIR CONDI-
TIONING/DISTRIBUTION - REAR/A/C CON-
DENSER COVER - INSTALLATION).
REARA/CEVAPORATOR
REMOVAL
WARNING: Refer to the applicable warnings and
cautions for this system before performing the fol-
lowing operation (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - WARNINGS) and (Refer
to 24 - HEATING & AIR CONDITIONING/PLUMBING -
CAUTIONS). Failure to follow the warnings and cau-tions could result in possible personal injury or
death.
(1) Remove the rear A/C evaporator housing and
place it on a workbench (Refer to 24 - HEATING &
AIR CONDITIONING/DISTRIBUTION - REAR/
REAR A/C EVAPORATOR HOUSING - REMOVAL).
(2) Remove the five screws and washers that
secure the condensate drain pan to the bottom of the
rear A/C evaporator and remove the drain pan (Fig.
23).
(3) Remove the insulating tape from around the
area of the rear A/C expansion valve and disconnect
the expansion valve from the rear A/C evaporator
(Refer to 24 - HEATING & AIR CONDITIONING/
PLUMBING/REAR A/C EXPANSION VALVE -
REMOVAL).
(4) Remove the left blower motor from the rear
A/C evaporator housing (Refer to 24 - HEATING &
AIR CONDITIONING/DISTRIBUTION - REAR/
BLOWER MOTOR - REMOVAL).
CAUTION: Be careful when drilling out rivets to pre-
vent damage to the rear A/C components.
(5) Remove the rivets that secure the three covers
to the rear A/C evaporator and remove the covers.
(6) Remove the four rivets that secure the rear A/C
evaporator the bottom of the rear A/C evaporator
housing and remove the evaporator.
Fig. 22 Rear A/C Condenser Fan
1 - REAR A/C CONDENSER FAN
2 - BOLT (4)
3 - REAR CONDENSER FAN SUPPRESSION FILTER
4 - FAN WIRE HARNESS CONNECTOR
5 - REAR A/C CONDENSER HOUSING
Fig. 23 Rear A/C Evaporator
1 - REAR A/C EVAPORATOR HOUSING
2 - RIVET (12)
3 - COVERS
4 - REAR A/;C EVAPORATOR
5 - SCREW AND WASHER (5)
6 - CONDENSATE DRAIN PAN
24 - 84 PLUMBINGVA

REMOVAL
WARNING: Refer to the applicable warnings and
cautions for this system before performing the fol-
lowing operation (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - WARNINGS) and (Refer
to 24 - HEATING & AIR CONDITIONING/PLUMBING -
CAUTIONS). Failure to follow the warnings and cau-
tions could result in possible personal injury or
death.
(1) Disconnect and isolate the negative battery
cable.
(2) Remove the cover from the rear A/C evaporator
housing (Refer to 24 - HEATING & AIR CONDI-
TIONING/DISTRIBUTION - REAR/A/C EVAPORA-
TOR COVER-REAR - REMOVAL).
(3) Recover the refrigerant from the rear refriger-
ant system (Refer to 24 - HEATING & AIR CONDI-
TIONING/PLUMBING - STANDARD PROCEDURE -
REFRIGERANT RECOVERY).
(4) Remove the insulating tape from around the
area of the rear A/C expansion valve (Fig. 25).
(5) Disconnect the equalizer tube from the rear
evaporator outlet tube.
(6) Disconnect the rear liquid line from the rear
A/C expansion valve and remove and discard the
O-ring seal.
(7) Disconnect the rear A/C expansion valve from
the rear evaporator inlet tube and remove and dis-
card the O-ring seal.
(8) Remove the retaining clamp that secures the
sensor bulb to the evaporator outlet tube and remove
the expansion valve, capillary tube and sensor bulb
as an assembly.
(9) Install plugs into, or tape over the opened
refrigerant line and evaporator tube fittings and
expansion valve ports.
24 - 86 PLUMBINGVA

REAR DISCHARGE LINE
DESCRIPTION
The rear A/C discharge line is the refrigerant line
that carries refrigerant from the underbody discharge
line to the rear A/C condenser (Fig. 26). The rear A/C
discharge line is retained to the right quarter panel
by two plastic retaining clips.
CAUTION: Use only seals specified for the vehicle.
Failure to use the correct seals will cause the refrig-
erant system connections to leak.
The rear A/C discharge line has no serviceable
parts except for the O-ring seals. The O-ring seals
used on the connections are made from a special type
of rubber not affected by R-134a refrigerant and
must be replaced whenever the rear discharge line is
removed and installed.
If the rear A/C discharge line is found to be leaking
or damaged, it must be replaced.
REMOVAL
WARNING: Refer to the applicable warnings and
cautions for this system before performing the fol-
lowing operation (Refer to 24 - HEATING & AIR
CONDITIONING/PLUMBING - WARNINGS) and (Refer
to 24 - HEATING & AIR CONDITIONING/PLUMBING -
CAUTIONS). Failure to follow the warnings and cau-
tions could result in possible personal injury or
death.(1) Disconnect and isolate the negative battery
cable.
(2) Remove the cover from the rear A/C evaporator
housing (Refer to 24 - HEATING & AIR CONDI-
TIONING/DISTRIBUTION - REAR/A/C EVAPORA-
TOR COVER-REAR - REMOVAL).
(3) Recover the refrigerant from the rear refriger-
ant system (Refer to 24 - HEATING & AIR CONDI-
TIONING/PLUMBING - STANDARD PROCEDURE -
REFRIGERANT RECOVERY).
(4) Remove the cover from the rear A/C condenser
housing (Refer to 24 - HEATING & AIR CONDI-
TIONING/DISTRIBUTION - REAR/A/C CON-
DENSER COVER - REMOVAL).
(5) Remove the screw and bracket that secures the
rear A/C discharge line to the right side of the rear
A/C condenser housing (Fig. 27).
(6) Disconnect the rear A/C discharge line from the
rear A/C condenser and remove and discard the
O-ring seal.
(7) Disengage the discharge line grommet from the
roof panel and push the grommet down into the
cargo compartment.
(8) Remove the right quarter trim panel (Refer to
23 - BODY/INTERIOR/QUARTER TRIM PANEL -
REMOVAL).
(9) Remove the retaining strap that secures the
rear A/C wire harness to the rear A/C discharge line
at the ceiling and position the wire harness out of
the way (Fig. 28).
Fig. 26 Rear A/C Discharge Line
1 - REAR A/C DISCHARGE LINE
2 - RETAINING CLIPS
3 - TO REAR A/C CONDENSER
4 - RIGHT INNER QUARTER PANEL
5 - TO UNDERBODY DISCHARGE LINEFig. 27 Rear A/C Discharge Line to Rear Condenser
1 - REAR A/C CONDENSER
2 - GROMMET
3 - REAR A/C DISCHARGE LINE
4 - CONDENSER INLET TUBE
5 - SCREW AND BRACKET
24 - 88 PLUMBINGVA