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)