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
–
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
–
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
–
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
–
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.
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