Lexus GS300/400 (2000 year). Service manual — part 2

N13790

Low Pressure
Service Valve

High Pressure
Service Valve

AC–12

–

AIR CONDITIONING

AIR CONDITIONING SYSTEM

2697

3.

INSTALL CHARGING CYLINDER

HINT:
When handling the charging cylinder, always follow the direc-
tions given in the instruction manual.
(a)

Charge the proper amount of refrigerant into the charging
cylinder.

(b)

Connect the center hose to the charging cylinder.

CAUTION:
Do not open both high and low hand valves of manifold
gauge set.
(c)

Open the valve of charging cylinder.

(d)

Press the valve core on the side of manifold gauge and
expel the air inside of the center hose.

A fully charged system is indicated by the sight glass being free
of any bubbles.
4.

SET OFF MANIFOLD GAUGE SET

(a)

Close both hand valves of manifold gauge set.

(b)

Disconnect the quick disconnect adapters from the ser-
vice valves.

5.

INSTALL CAPS TO SERVICE VALVES ON REFRIGER-
ANT LINES

AC0WA–01

I03811

Smog Ventilation
Sensor

No. 2 Cooling Fan Relay
(Marking: FAN NO.2)

No. 3 Cooling Fan Relay
(Marking: FAN NO.3)

Compressor

Magnetic Clutch Relay
(Marking A/C COMP)

Condenser

Ambient Temperature Sensor

Condenser Fan

Engine Coolant Temperature
(ECT) Switch

Air Inlet Servomotor

Blower Motor

Air Outlet Servomotor

A/C Amplifier

Evaporator

Solar Sensor

A/C Control Assembly

Electrical Multi Vision
(Built in A/C Control Assembly)

Expansion Valve

Air Refiner Filter

Blower Motor Control
Relay

Evaporator Temperature
Sensor

Heater Radiator

Air Mix Servomotor
(Driver Side)

Air Mix Servomotor
(Passenger Side)

Room Temperature
Sensor

–

AIR CONDITIONING

AIR CONDITIONING SYSTEM

AC–13

2698

LOCATION

CH0086

Correct

Wrong

AC0WB–01

I03853

GS 400:

A
B

P10652

GS 300:

Type A

Type B

A

B

A

B

AC–14

–

AIR CONDITIONING

DRIVE BELT

2699

DRIVE BELT

ON–VEHICLE INSPECTION

1.

INSPECT DRIVE BELT’S INSTALLATION CONDITION

Check that the drive belt fits properly in the ribbed grooves.

2.

INSPECT DRIVE BELT TENSION

Check that the arrow mark on the belt tensioner falls within area
”A” of the scale.
If it is out side area ”A”, replace the drive belt.
HINT:
When a new belt is installed, it should be lie within area B.

AC0WC–01

I03854

GS300:

Turn

I03855

GS400:

–

AIR CONDITIONING

DRIVE BELT

AC–15

2700

REMOVAL

1.

GS 300:
REMOVE DRIVE BELT

Loosen the drive belt tension by turning the drive belt tensioner
clockwise and remove the drive belt.

2.

GS 400:
REMOVE DRIVE BELT

Loosen the drive belt tension by turning the drive belt tensioner
counterclockwise and remove the drive belt.