Toyota 2008 Camry User manual

AIR CONDITIONING SYSTEM
–AIR CONDITIONING SYSTEM AC–1

PRECAUTIONS FOR SERVICING R134a AIR
CONDITIONERS
1. USE OF NEW REFRIGERANT R134a
The very different characteristics of refrigerants
R134a and R12 have determined the design of their
respective air conditioning systems. Under no circum–
stances allow R12 to enter an R134a system, or vice
versa, because serious damage could occur.
GENERAL DESCRIPTION
NEW AIR CONDITIONING SYSTEM WITH
R134a
Refrigerant R12 (CFC12), previously used in automo–
biles air conditioning systems is believed to contribute
towards the depletion the earth’s ozone layer. The
ozone layer help to protect us against the harmful
ultraviolet rays of the sun.
2. USE OF PROPER COMPRESSOR OIL
Compressor oil used in conventional R12 air condi–
tioning systems cannot be used in R 134a air condi–
tioning systems.
Always use genuine Toyota R1 34a air conditioning oil
N D – OIL 8, made expressly for use with R 1 34a.
If even a small amount of the wrong oil is changed, it
will result in clouding of the refrigerant.
A large amount will cause the compressor to seize up.
A newly developed refrigerant, R134 a (HFC 134 a),
does not the destroy the ozone layer.
–AIR CONDITIONING SYSTEM GENERAL DESCRIPTION
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4. TIGHTEN CONNECTING PARTS SECURELY
Securely tighten the connecting parts to prevent leak–
ing of refrigerant gas.
Apply a few drops of compressor oil to 0–ring
fittings for easy tightening and to prevent leaking
of refrigerant gas.
CAUTION: Apply only ND–OIL 8 compressor oil
Tighten the nuts using 2 wrenches to avoid twist–
ing the tube.
Tighten the 0–ring fittings or the bolted type
fittings to the specified torque.
5. INSERT PLUG IMMEDIATELY IN DISCONNECTED
PARTS
Insert a plug immediately in the disconnected parts to
prevent the ingress of moisture and dust.
6. DO NOT REMOVE PLUG FROM NEW PARTS UNTIL
IMMEDIATELY BEFORE INSTALLATION
3. USE OF PROPER O – RINGS AND SEALS
0–rings and seals used for conventional R12 air
conditioning systams cannot be used for R134a air
conditioning systems.
Always use genuine Toyota R 134a system 0–rings
and seals for R 1 34a air conditioning systems.
7. DISCHARGE GAS IN NEW COMPRESSOR FROM
CHARGING VALVE BEFORE INSTALLING IT
If the gas in the new compressor is not discharged
first, compressor oil will spray out with gas when the
plug is removed.
If O–rings and/or seals for R1 2 air conditioning sys–
tems are used by mistake in the connections of an R
134a air conditioning system, the O–ring and seals
will foam and swell resulting in leakage of refrigerant.
–AIR CONDITIONING SYSTEM GENERAL DESCRIPTION AC–3

3. USE VACUUM PUMP ADAPTER
By connecting a vacuum pump adapter, the vacuum
pump can be used for both R 134a and R 12 air condi–
tioning systems.
The vacuum pump adaptor has an internal magnetic
valve.
When evacuation is completed and the vacuum pump
switch is turned off, the magnetic valve opens allow–
ing the introduction atmospheric air into the manifold
gauges to prevent the back flow of oil from the
vacuum pump into the gauge hose.
CAUTION:
Be sure to turn off the manifold gauge valve immediately
after evacuating the system. Then you may switch off
the vacuum pump. If this order is reversed, the line will
be temporarily open to atmosphere.
SERVICE TOOLS FOR R134a AIR
CONDITIONER
When servicing R134a air conditioning systems
always use the R134a dedicated manifold gauges, gas
leak detector and vacuum pump adaptor.
1. USE MANIFOLD GAUGES FOR R134a AIR CONDITI–
ONER
Always use R134a dedicated manifold gauges to pre–
vent R1 2 and RI 2 compressor oil contaminating the R
134a system.
2. USE R134a GAS LEAK DETECTOR
Similarly, always use an R 134a dedicated leak detec–
tor. The R1 2 leak detector is not sufficiently sensitive.
–AIR CONDITIONING SYSTEM GENERAL DESCRIPTION
AC–4

3. BE CAREFUL THAT LIQUID REFRIGERANT DOES
NOT GET 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 profes–
sional treatment.
HANDLING PRECAUTIONS FOR
REFRIGERANT CONTAINER
1. NEVER HEAT CONTAINER OR EXPOSE IT TO
NAKED FLAME
2. BE CAREFUL NOT TO DROP CONTAINER AND NOT
TO APPLY PHYSICAL SHOCKS TO IT
HANDLING PRECAUTIONS FOR
REFRIGERANT
1. DO NOT HANDLE REFRIGERANT IN AN ENCLOSED
AREA OR NEAR AN OPEN FLAME
2. ALWAYS WEAR EYE PROTECTION
CHARGING AND LEAK–CHECK METHODS
Evacuate the refrigeration system according to the
following procedures.
Fill refrigerant in gas state until
gauge pressure reads 1 kglcm2
Abnormal indication of
manifold gauges
Check and correct
pipe joints
Refrigerant
Charge
Refrigerant
Charge
Start
Evacuation Stop
Evacuation
Leave for 5 min.
Gas Leak
Check
Airtight
Check
10 min.
–AIR CONDITIONING SYSTEM GENERAL DESCRIPTION AC–5

CAUTION:
•Be sure to connect both the high and low pressure
quick–connectors onto the A/C system when eva–
cuating. If only one side is connected, the system
would be open to atmosphere through the other
connector, making it impossible to maintain
vacuum.
•Be sure to turn off the manifold gauge valve imme–
diately after evacuating the system. Then you may
switch off the vacuum pump.
PRECAUTIONS WHEN CHARGING
REFRIGERANT
1. DO NOT OPERATE COMPRESSOR WITHOUT
ENOUGH REFRIGERANT IN REFRIGERANT
SYSTEM
If there is not enough refrigerant in the refrigerant
system oil lubrication will be insufficient and compres–
sor burnout may occur, so take care to avoid this.
2. DO NOT OPEN HIGH PRESSURE MANIFOLD VALVE
WHILST COMPRESSOR IS OPERATING
If the high pressure valve is opened, refrigerant flows
in the reverse direction and could cause the charging
cylinder to rupture, so open and close the low pres–
sure valve only.
3. BE CAREFUL NOT TO OVERCHARGE WITH RE–
FRIGERANT IN SYSTEM
If refrigerant is overcharged, it causes problems such
as insufficient cooling, poor fuel economy, engine
overheating etc.
ELECTRICAL PARTS
Before removing and inspecting the electrical parts,
set the ignition switch to the LOCK position and
disconnect the negative (–) terminal cable from bat–
tery.
CAUTION: Work must be started after 90 seconds from
the time the Ignition switch is turned to the “LOCK”
position and the negative (–) terminal cable is discon–
nected from the battery.
–AIR CONDITIONING SYSTEM GENERAL DESCRIPTION
AC–6

SUPPLEMENTAL RESTRAINT SYSTEM
(SRS)
Failure to carry out service operations in the correct
sequence could cause the supplemental restraint
system to deploy, possibly leading to a serious acci–
dent.
During removal or installation of the parts and the
yellow wire harness and connector for the airbag is
necessary, refer to the precautionary notices in the RS
section before performing the operation.
CAUTION: Work must be started after 90 seconds from
the time the ignition switch is turned to the “LOCK”
position and the negative (–) terminal cable is discon–
nected from the battery.
–AIR CONDITIONING SYSTEM GENERAL DESCRIPTION AC–7

DESCRIPTION
PARTS LOCATION
–AIR CONDITIONING SYSTEM DESCRIPTION
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–AIR CONDITIONING SYSTEM DESCRIPTION AC–9

ELECTRICAL WIRING DIAGRAM
(Lever Type On 5S–FE Engine Model)
–AIR CONDITIONING SYSTEM DESCRIPTION
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