Lexus ES300 (1997 year). Manual - part 32

AC09F–01

N13793

Push

Air

Low Pressure 
Service Valve

High Pressure 
Service Valve

Charging Cylinder

N13792

Gas Leak 
Detector

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AIR CONDITIONING

AIR CONDITIONING SYSTEM

AC–11

1568

1997 LEXUS ES300   (RM511U)

CHARGING

1.

INSTALL CHARGING CYLINDER

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

Charge proper amount of refrigerant into the charging cyl-
inder.

(b)

Connect the center hose to the charging cylinder.

CAUTION:
Do not open both high and low pressure 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.

2.

INSPECT REFRIGERATION SYSTEM FOR LEAKS

(a)

Open the high pressure hand valve and charge refriger-
ant.

(b)

When the low pressure gauge indicates 98 kPa 
(1 kgf/cm

2

, 14 psi), close the high pressure hand valve.

(c)

Using a gas leak detector, check the system for leakage.

(d)

If leak is found, repair the faulty component or connection.

CAUTION:
Use the refrigerant recovery/ recycling machine to recover
the refrigerant whenever replacing parts.

N13790

Low Pressure 
Service Valve

High Pressure 
Service Valve

AC–12

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AIR CONDITIONING

AIR CONDITIONING SYSTEM

1569

1997 LEXUS ES300   (RM511U)

3.

CHARGE REFRIGERANT INTO REFRIGERANT SYS-
TEM

If there is no leak after refrigerant leak check, charge the proper
amount of refrigerant into refrigeration system.
CAUTION:

Never run the engine when charging system through
the high pressure side.

Do not open the low pressure hand valve when the
system is being charged with liquid refrigerant.

(a)

Open the high pressure and valve fully.

(b)

Charge specified amount of refrigerant, then close the
high pressure hand valve.

HINT:
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 valve.

5.

INSTALL CAPS TO SERVICE VALVES ON REFRIGER-
ANT LINES

AC09G–03

Z19363

No. 1 Engine Coolant Temperature
(ECT) Switch

No. 2 Engine Coolant Temperature
(ECT) Switch

Water Valve

Engine Room Relay
Block No. 1

 No. 3 Cooling Fan Relay

(Marking: FAN RLY NO.3)

Condenser

Receiver

Condenser Fan

Compressor

Solar Sensor

Blower Motor

Room Temperature Sensor

Blower Unit

Evaporator Temperature Sensor

Evaporator

Blower Resistor

Blower Motor Linear Controller

Air Outlet Servomotor

Air Mix Servomotor

Expansion Valve

Air Inlet Servomotor

 Magnetic Clutch Relay

 (Marking: MG CLT RLY)

Ambient Temperature Sensor

 Heater Main Relay

 (Marking: HTR RLY)

 No. 2 Cooling Fan Relay

 (Marking: FAN RLY NO.2)

Engine Room Junction 
Block No. 2

 No. 1 Cooling Fan Relay

(Marking: FAN RLY NO.1)

A/C Control Assembly

 A/C Control Panel

 A/C Amplifier

Heater Radiator

 Engine Main Relay

(Marking: ENGINE MAIN RLY)

A/C Unit

Pressure
Switch

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AIR CONDITIONING

AIR CONDITIONING SYSTEM

AC–13

1570

1997 LEXUS ES300   (RM511U)

LOCATION

CH0086

Correct

Wrong

AC09H–01

N17028

Crankshaft Pulley

Generator

Compressor

N01881

DENSO

Borroughs

AC–14

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AIR CONDITIONING

DRIVE BELT

1571

1997 LEXUS ES300   (RM511U)

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

Using a belt tension gauge, check the drive belt tension.

Drive belt tension:
New belt: 165 

±

 26 lbf

Used belt: 110 

±

 11 lbf

HINT:

”New belt” refers to a belt which has been used less than
5 minutes on a running engine.

”Used belt” refers to a belt which has been used on a run-
ning engine for 5 minutes or more.

After installing the drive belt, check that it fits properly in
the ribbed grooves.