Lexus GS300/400 (2000 year). Service manual - part 9

AC0WS–01

–

AIR CONDITIONING

BLOWER UNIT

AC–33

2718

INSTALLATION

Installation is in the reverse order of removal (See page 

AC–30

).

AC0WT–01

I02373

GS300:

Ω

1

2

I02374

GS400:

Ω

1

2

AC–34

–

AIR CONDITIONING

COMPRESSOR AND MAGNETIC CLUTCH

2719

COMPRESSOR AND MAGNETIC
CLUTCH

ON–VEHICLE INSPECTION

1.

INSPECT COMPRESSOR FOR METALLIC SOUND

Check there is abnormal metallic sound from the compressor
when the A/C switch is ON.
If abnormal metallic sound is heard, replace the compressor as-
sembly.
2.

INSPECT REFRIGERANT PRESSURE
(See page 

AC–3

)

3.

INSPECT VISUALLY FOR LEAKAGE OF REFRIGER-
ANT

Using a gas leak detector, check for leakage of refrigerant.
If there is any leakage, replace the compressor assembly.

4.

INSPECT COMPRESSOR LOCK SENSOR RESIS-
TANCE

(a)

Disconnect the connector.

(b)

Measure resistance between terminals 1 and 2.
Standard resistance:
570 – 1,050 

Ω

 at 20

°

C (68 

°

F)

If resistance is not as specified, replace the compressor.

I02376

GS300:

3

I02375

GS400:

3

–

AIR CONDITIONING

COMPRESSOR AND MAGNETIC CLUTCH

AC–35

2720

5.

MAKE THESE VISUAL CHECKS:

(a)

Leakage of grease from the clutch bearing.

(b)

Signs of oil on the pressure plate or rotor.

6.

INSPECT MAGNETIC CLUTCH BEARING FOR NOISE

(a)

Start engine.

(b)

Check for abnormal noise from the compressor when the
A/C switch is OFF.

If abnormal noise is being emitted, replace the rotor of magnetic
clutch.

7.

INSPECT MAGNETIC CLUTCH OPERATION

(a)

Disconnect the connector.

(b)

Connect the positive (+) lead from the battery to terminal
3 and the negative (–) lead to the body ground.

(c)

Check that the magnetic clutch is energized.

If operation is not as specified, replace the magnetic clutch.

AC0WU–01

I02379

GS300:

PS Pump

PS Pump Bracket

52 (530, 38)

Compressor Bracket

52 (530, 38)

58 (590, 43)

Drive Belt

52 (530, 38)

 O–Ring

Discharge Hose

10 (100, 7)

Suction Hose

10 (100, 7)

 O–Ring

26 (265, 19)

52 (530, 38)

52 (530, 38)

Engine Under Cover

GS400:

Drive Belt

10 (100, 7)

10 (100, 7)

Discharge Hose

Suction Hose

 O–Ring

 O–Ring

 O–Ring

10 (100, 7)

49 (500, 36)

29 (300, 22)

Stay

Engine Under Cover

Compressor

N·m (kgf·cm, ft·lbf) : Specified torque

 Non–reusable part

58 (590, 43)

Compressor

52 (530, 38)

AC–36

–

AIR CONDITIONING

COMPRESSOR AND MAGNETIC CLUTCH

2721

COMPONENTS