2005 LEXUS ES300 engine

550BQ-01
AC2810
AC2811
N11084
Wrong Okay
HI
LO HI LO
- HEATER & AIR CONDITIONERAIR CONDITIONING SYSTEM
55-1
2616 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
AIR CONDITIONING SYSTEM
PRECAUTION
1. DO NOT HANDLE REFRIGERANT IN AN ENCLOSED
AREA OR NEAR AN OPEN FLAME
2. ALWAYS WEAR EYE PROTECTION
3. BE CAREFUL NOT TO GET LIQUID REFRIGERANT IN
YOUR EYES OR ON YOUR SKIN
If liquid refrigerant gets in your eyes or on your skin.
(a) Wash the area with lots of cool water.
CAUTION:
Do not rub your eyes or skin.
(b) Apply clean petroleum jelly to the skin.
(c) Go immediately to a physician or hospital for professional
treatment.
4. NEVER HEAT CONTAINER OR EXPOSE IT TO NAKED
FLAME
5. BE CAREFUL NOT TO DROP CONTAINER AND NOT
TO APPLY PHYSICAL SHOCKS TO IT
6. DO NOT OPERATE COMPRESSOR WITHOUT
ENOUGH REFRIGERANT IN REFRIGERANT SYSTEM
If there is not enough refrigerant in the refrigerant system oil lu-
brication will be insufficient and compressor burnout may occur,
so take care to avoid this, necessary care should be taken.
7. DO NOT OPEN HIGH PRESSURE MANIFOLD VALVE
WHILE COMPRESSOR IS OPERATING
If the high pressure valves opened, refrigerant flows in the re-
verse direction and could cause the charging cylinder to rup-
ture, so open and close the only low pressure valve.
8. BE CAREFUL NOT TO OVERCHARGE SYSTEM WITH
REFRIGERANT
If refrigerant is overcharged, it causes problems such as insuffi-
cient cooling, poor fuel economy, engine overheating etc.

550D4-02
I31521
Sight Glass
55-2
- HEATER & AIR CONDITIONERREFRIGERANT
2617 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
REFRIGERANT
ON-VEHICLE INSPECTION
1. INSPECT REFRIGERANT VOLUME
(a) Observe the sight glass on the cooler refrigerant liquid
pipe A.
Test conditions:

Running engine at 1,500 rpm

Blower speed control switch at ºHIº

A/C switch ON

Temperature control dial at ºMAX. COOLº

Fully open the doors
ItemSymptomAmount of refrigerantCorrective Actions
1Bubbles presentInsufficient*
(1) Check for gas leakage and repair if nec-
essary
(2) Add refrigerant until bubbles disappear
2No bubbles presentNone, insufficient or too muchRefer 3 and 4
3No temperature difference between com-
pressor inlet and outletEmpty or nearly empty
(1) Check for gas leakage with gas leak de-
tector and repair if necessary
(2) Add refrigerant until bubbles disappear
4Considerable temperature difference be-
tween compressor inlet and outlet.Correct or too muchRefer to 5 and 6
5Immediately after air conditioning is turned
off, refrigerant clearToo much
(1) Discharge refrigerant
(2) Remove air and supply proper amount or
purified refrigerant
6
Immediately after air conditioning is turned
off, refrigerant foams and then becomes
clear
Correct-
*: Bubbles in the sight glass with ambient temperatures higher than usual can be considered normal if cooling
is sufficient.

E50573
I22117
Condition : Periodically cools and then fails to cool
- HEATER & AIR CONDITIONERREFRIGERANT
55-3
2618 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
2. INSPECT REFRIGERANT PRESSURE WITH MAN-
IFOLD GAUGE SET
(a) This is a method in witch the trouble is located by using
a manifold gauge set. Read the manifold gauge pressure
when the these conditions are established.
Test conditions:

Temperature at the air inlet with the switch set
at RECIRC is 30 - 35 °C (86 - 95 °F)

Engine running at 1,500 rpm

Blower speed control switch at ºHIº position

Temperature control dial at ºCOOLº position

A/C switch ON

Fully open doors
(1) Normally functioning refrigeration system.
Gauge reading:
Low pressure side:
0.15 - 0.25 MPa (1.5 - 2.5 kgf/cm
2)
High pressure side:
1.37 - 1.57 MPa (14 - 16 kgf/cm
2)
(2) Moisture present in refrigeration system.
SymptomProbable causeDiagnosisRemedy
During operation, pressure on low
pressure side sometimes become
a vacuum and sometime normal
Moisture in refrigerating system
freezes at expansion valve orifice
causing a temporary stop of cycle,
however, when it melts, normal
state is restored.
Drier in oversaturected state

Moisture in refrigerating system
freezes at expansion valve orifice
and blocks circulation of refriger-
ant(1) Replace condenser
(2) Remove moisture in cycle by
repeatedly evacuating air
(3) Supply proper amount of new
refrigerant

I22120
Condition: Cooling system does not function. (Sometimes it way function)
I22121
Condition: Cooling system does not function effectively.
- HEATER & AIR CONDITIONERREFRIGERANT
55-5
2620 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
(5) Refrigerant does not circulate
SymptomProbable causeDiagnosisCorrective Actions

Vacuum indicated on low pres-
sure side, very low pressure indi-
cated on high pressure side

Frost or dew seen on piping be-
fore and after receiver/ drier or ex-
pansion valve
Refrigerant flow obstructed by
moisture or dirt in refrigerating sys-
tem

Refrigerant flow obstructed by
gas leaked from expansion valve
Refrigerant does not circulate
(1) Check expansion valve
(2) Clean out dirt in expansion
valve by air blowing
(3) Replace condenser
(4) Evaporate air and supply prop-
er amount of new refrigerant.
(5) For gas leakage from expan-
sion valve, replace expansion
valve
(6) Refrigerant overcharged or insufficient cooling of
condenser
SymptomProbable causeDiagnosisRemedy

Pressure too high on both low
and high pressure sides

No sir bubbles seen through the
sight glass even when the engine
rpm is lowered
Unable to develop sufficient per-
formance due to excessive use of
refrigerating system

Insufficient cooling of condenser

Excessive refrigerant in
cycle"too much refrigerant sup-
plied

Condenser cooling
insufficient"condenser fins
clogged at cooling fan(1) Clean condenser
(2) Check cooling fan with cooling
fan motor operation
(3) If (1) and (2) are in normal
state, check amount of refrigerant
and supply proper amount of re-
frigerant

550D5-02
I30082
Over charged Mean
value
in proper
range Add. 100g
High
Pressure
Refrigerant Amount Point where
bubbles disappear
50 g (
1. 76 oz.) Amount to be charged
Sub-cool system 55-8
- HEATER & AIR CONDITIONERREFRIGERANT
2623 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
REPLACEMENT
1. DISCHARGE REFRIGERANT FROM REFRIGERATION SYSTEM
(a) Turn the A/C switch ON.
(b) Operating the cooler compressor at the engine rpm of approx. 1,000 for 5 to 6 min., circulate the refrig-
erant and collect compressor oil remaining in each component into the cooler compressor as much
as possible.
(c) Stop the engine.
(d) Let the refrigerant gas out.
SST 07110-58060 (07117-58080, 07117-58090, 07117-78050, 07117-88060, 07117-88070,
07117-88080)
2. CHARGE REFRIGERANT
(a) Using a vacuum pump, perform a vacuum pumping.
(b) Charge refrigerant, HFC-134a (R134a).
Standard: 550
50 g (19.37
1. 76 oz.)
SST 07110-58060 (07117-58060, 07117-58070, 07117-58080, 07117-58090, 07117-78050,
07117-88060, 07117-88070, 07117-88080)
3. WARM UP ENGINE
4. INSPECT LEAKAGE OF REFRIGERANT

550D7-02
I30370
Bolt C
Bolt ABolt B
I30370
I30370
Measuring
Position
Bolt B
N01881
DENSO Boroughs 55-10
- HEATER & AIR CONDITIONERV (COOLER COMPRESSOR TO CRANKSHAFT
PULLEY) BELT NO.1
2625 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
V (COOLER COMPRESSOR TO CRANKSHAFT PULLEY)
BELT NO.1
REPLACEMENT
1. REMOVE V (COOLER COMPRESSOR TO
CRANKSHAFT PULLEY) BELT NO.1
(a) Loosen the bolt C.
(b) Loosen the bolt A.
(c) Loosen the bolt B and remove the cooler V belt No. 1.
2. INSTALL V (COOLER COMPRESSOR TO
CRANKSHAFT PULLEY) BELT NO.1
(a) Temporarily install the cooler V belt No. 1 as illustrated.
3. ADJUST V (COOLER COMPRESSOR TO
CRANKSHAFT PULLEY) BELT NO.1
(a) Apply drive belt tension by turning the bolt B.
Drive belt tension:
New Belt: 165
27 lbf
Used belt: 88
22 lbf
HINT:

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

ºUsed beltº 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.

I06878
Connect
GapWrong 55-32
- HEATER & AIR CONDITIONERAIR CONDITIONING RADIATOR ASSY
2647 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
42. INSTALL COOLER REFRIGERANT SUCTION HOSE
NO.1
(a) Lubricate new O-ring with compressor oil and install them
to the hose.
Compressor oil: ND-OIL 8 or equivalent
(b) Install the cooler refrigerant suction hose No.1 and piping
clamp.
HINT:
After connection, check the fitting for claw of the piping clamp.
43. INSTALL COOLER REFRIGERANT LIQUID PIPE A
HINT:
Install in the same way as the cooler refrigerant suction hose No. 1.
44. ADD COOLANT (See page 16-9)
45. CHARGE REFRIGERANT (See page 55-8)
SST 07110-58060 (07117-58060, 07117-58070, 07117-58080, 07117-58090, 07117-78050,
07117-88060, 07117-88070, 07117-88080)
Specified amount: 550
50 g (19.37
1.76 oz.)
46. WARM UP ENGINE
47. CHECK ENGINE COOLANT LEAK (See page 16-9)
48. INSPECT LEAKAGE OF REFRIGERANT (See page 55-8)

I31562
(F)
I31542
I31543
55-42
- HEATER & AIR CONDITIONERCOOLER COMPRESSOR ASSY
2657 Author
: Date
:
2005 LEXUS ES330 REPAIR MANUAL (RM1124U)
(c) Tighten the compressor and magnetic clutch with the bolt
(F).
Torque: 25 NVm (250 kgfVcm, 18 ftVlbf)
(d) Connect the connector.
16. INSTALL COOLER REFRIGERANT SUCTION HOSE
NO.1
(a) Remove the attached vinyl tape from the hose.
(b) Sufficiently apply compressor oil to the new O-ring and
fit surface of the compressor and magnetic clutch.
Compressor oil: ND-OIL 8 or equivalent
(c) Install a O-ring to the cooler refrigerant suction hose
No. 1.
(d) Install the cooler refrigerant suction hose No. 1 to the
compressor and magnetic clutch with the nut.
Torque: 9.8 NVm (100 kgfVcm, 87 in.Vlbf)
17. INSTALL COOLER REFRIGERANT DISCHARGE
HOSE NO.1
(a) Remove the attached vinyl tape from the hose.
(b) Sufficiently apply compressor oil to the new O-ring and
fit surface of the compressor and magnetic clutch.
Compressor oil: ND-OIL 8 or equivalent
(c) Install a O-ring to the cooler refrigerant discharge hose
No. 1.
(d) Install the cooler refrigerant discharge hose No. 1 to the
compressor and magnetic clutch with the nut.
Torque: 9.8 NVm (100 kgfVcm, 87 in.Vlbf)
18. INSTALL GENERATOR ASSY (See page 19-21)
19. INSTALL V (COOLER COMPRESSOR TO CRANKSHAFT PULLEY) BELT NO.1
(See page 55-10)
20. CHARGE REFRIGERANT (See page 55-8)
SST 07110-58060 (07117-58060, 07117-58070, 07117-58080, 07117-58090, 07117-78050,
07117-88060, 07117-88070, 07117-88080)
Specified amount: 550
50 g (19.37
1.76 oz.)
21. WARM UP ENGINE
22. INSPECT LEAKAGE OF REFRIGERANT (See page 55-8)