Lexus RX300 (MCU15). Service manual — part 90
I06834
I07919
Heater Radiator Pipe
Hose Clip
View A
RH
Lower
Upper
1 – 7 mm (0.39 – 0.28in.)
Upper
LH
90
°
90
°
View A
Water Hose
Lower
RH
LH
I06848
I06833
AC–28
–
AIR CONDITIONING
AIR CONDITIONER UNIT
LEXUS RX300 (RM785E)
11.
DISCONNECT WATER HOSES FROM HEATER RA-
DIATOR PIPES
(a)
Grip the claws of the hose clip and slide the hose clip
along the water hose.
(b)
Disconnect the water hose.
HINT:
At the time of installation, please refer to the following items.
S
Push the water hose onto the heater radiator pipe as far
as the grommet.
S
Install the hose clip in a position, as shown in the illustra-
tion.
12.
REMOVE BLOWER UNIT
(a)
Disconnect the connectors.
(b)
Remove the 3 screws and air duct.
(c)
Disconnect wire harness clamp.
(d)
Remove the nut, 2 bolts, screw and blower unit.
I06840
I06844
I06839
I07920
Front
Upper
Marking
Marking
–
AIR CONDITIONING
AIR CONDITIONER UNIT
AC–29
LEXUS RX300 (RM785E)
13.
REMOVE A/C UNIT
(a)
Release the 2 claws and remove the lower defroster
nozzle and heater to resister center duct.
(b)
Remove the No.1 console box duct.
(c)
Disconnect the connector.
(d)
Remove the 2 nuts, 2 bolts and A/C unit.
HINT:
At the time of installation, please refer to the following item.
Align the marking on the drain hose, as shown in the illustration.
AC3AO–01
I06837
I07907
I06863
I06846
I06838
AC–30
–
AIR CONDITIONING
AIR CONDITIONER UNIT
LEXUS RX300 (RM785E)
DISASSEMBLY
1.
REMOVE AIR OUTLET SERVOMOTOR
(a)
Disconnect the connector.
(b)
Remove the 2 screws and servomotor.
2.
REMOVE WIRE HARNESS
3.
REMOVE BRACKET
Remove the bolt and bracket.
4.
REMOVE HEATER RADIATOR
(a)
Remove the 2 screws and 2 plates.
(b)
Pull out the heater radiator.
5.
REMOVE BLOWER MOTOR CONTROL RELAY
Remove the screw and blower motor control relay.
6.
REMOVE AIR MIX SERVOMOTOR
Remove the 2 screws and servomotor.
I06862
I03738
I06847
LHD model:
I18277
RHD model:
I06842
–
AIR CONDITIONING
AIR CONDITIONER UNIT
AC–31
LEXUS RX300 (RM785E)
7.
REMOVE EVAPORATOR TEMPERATURE SENSOR
(a)
Disconnect the connector clamp.
(b)
Using a screwdriver, pull out the sensor.
HINT:
Tape the screwdriver tip before use.
(c)
Release the 2 claws and remove the sensor from bracket
plate.
8.
REMOVE EXPANSION VALVE
(a)
Pry out the packings.
HINT:
At the time of reassembly, please refer to the following item.
Do not reuse the packing.
(b)
Using a hexagon wrench (5.0 mm, 0.20 in.), remove the
2 bolts, then separate the tube connector, expansion
valve and tube.
Torque: 4.1 N·m (42 kgf·cm, 36 in.·lbf)
NOTICE:
Cap the open fittings immediately to keep moisture or dirt
out of the system.
HINT:
At the time of reassembly, please refer to the following item.
Lubricate 4 new O–rings with compressor oil and install them
to the valve.
9.
REMOVE AIR DUCT (Driver Side)
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