Lexus GS300/400 (2000 year). Manual — part 8

–

AIR CONDITIONING

AIR CONDITIONING SYSTEM

AC–9

2694

3.

INSPECT IDLE–UP SPEED

(a)

Warm up engine

(b)

Inspect idle–up speed when the these conditions are es-
tablished.
Test conditions:

Blower speed control switch at ”HI” position

Temperature control dial at ”COOL” position

A/C switch ON

Put gear shift in neutral

GS300:

Magnetic clutch condition

Idle–up speed

Magnetic clutch not engaged

700

±

50 rpm

Magnetic clutch engaged

800

±

50 rpm

If idle speed is not as specified, check the idle control system.

GS400:

Magnetic clutch condition

Idle–up speed

Magnetic clutch not engaged

750

±

50 rpm

Magnetic clutch engaged

800

±

50 rpm

If idle speed is not as specified, check the idle control system.
4.

INSPECT FOR LEAKAGE OF REFRIGERANT

(a)

Perform in these conditions.

Stop engine

Secure good ventilation (If the gas leak detector
may not react volatile gases which are not refriger-
ant, such as evaporated gasoline and exhaust gas)

Repeat the test 2 or 3 times

Make sure that there is some refrigerant remaining
in the refrigeration system.
When compressor is OFF: approx. 392 – 588 kPa
(4 – 6 kgf·cm

2

, 57 – 85 psi)

(b)

Bring the gas leak detector close to the drain hose before
performing the test.

HINT:

After the blower motor has stopped, leave the cooling for
more than 15 minutes.

Expose the gas leak detector sensor under the drain
hose.

When bring the gas leak detector close to the drain hose,
make sure that the gas leak detector does not react to the
volatile gases.

If such reaction is unavoidable, the vehicle must be lifted up.
(c)

If gas leak is not detected on the drain hose, remove the
blower resistor from the cooling unit. Then insert the gas
leak detector sensor into the unit and perform the test.

(d)

Disconnect the connector and leave the pressure switch
for approx. 20 minutes. Then bring the gas leak detector
close to the pressure switch and perform the test.

(e)

Bring the gas leak detector close to the refrigerant lines.

AC0WP–01

I02367

I02368

I02369

AC–30

–

AIR CONDITIONING

BLOWER UNIT

2715

REMOVAL

1.

REMOVE INSTRUMENT PANEL AND REINFORCE-
MENT
(See page

BO–91

)

2.

REMOVE AIR DUCT

(a)

Disconnect the connector clamp.

(b)

Remove the 3 screws and air duct.

3.

DISCONNECT WIRE HARNESS

(a)

Release the claw of the connector bracket and discon-
nect the connector bracket.

(b)

Disconnect the wire harness set clamps.

(c)

Disconnect the wire harness.

4.

REMOVE BLOWER UNIT

(a)

Disconnect the connectors.

(b)

Remove the 2 bolts and bracket.

(c)

Remove the bolt, screw and nut.

(d)

Remove the blower unit.

AC0WQ–01

–

AIR CONDITIONING

BLOWER UNIT

AC–31

2716

DISASSEMBLY

1.

REMOVE AIR REFINER FILTER

(a)

Release the 4 claws and remove the cover.

(b)

Pull out the air refiner filter.

2.

REMOVE AIR INLET SERVOMOTOR

Remove the 3 screws and servomotor.
3.

REMOVE BLOWER MOTOR

Remove the 3 screws and blower motor.
4.

REMOVE BRACKET

Remove the screw and bracket.

AC0WR–01

AC–32

–

AIR CONDITIONING

BLOWER UNIT

2717

REASSEMBLY

Reassembly is in the reverse order of disassembly (See page

AC–26

).