TOYOTA CAMRY 2000 Service Repair Manual

I12257
± AIR CONDITIONINGAIR CONDITIONING CONTROL ASSEMBLY (Manual
A/C)AC±99
2587 Author: Date:
2001 CAMRY (RM819U)
9. INSPECT AIR INTAKE SWITCH CIRCUIT
(a) Connect the connectors to heater control assembly.
(b) Inspect wire harness side connector from the back side,
as shown in the chart.
Tester connectionConditionSpecified condition
7 ± GroundConstantContinuity
8 ± GroundConstantContinuity
3G dIG ON. Light control switch: TAILBattery positive voltage3 ± GroundIG ON. Light control switch: OFFNo voltage
4 ± GroundConstantBattery positive voltage
5G dIgnition switch: ONBattery positive voltage5 ± GroundIgnition switch: LOCK or ACC.No voltage
2G dIG ON. Mode selector: DEF.Below 0.3 V2 ± GroundIG ON. Mode selector: Except DEF.No voltage
6G dIG ON. Mode selector: F/DBelow 0.3 V6 ± GroundIG ON. Mode selector: Except F/DNo voltage
9G dIG ON. Air intake switch: RECBelow 2.0 V9 ± GroundIG ON. Air intake switch: FRSNo voltage
10 G dIG ON. Air intake switch: FRSBelow 2.0 V10 ± GroundIG ON. Air intake switch: RECNo voltage
If circuit is as specified, try replacing the air intake switch with
a new one. If the circuit is not as specified, inspect the circuits
connected to other parts.
10. INSPECT REAR DEFOGGER SWITCH OPERATION
(See page BE±57)

AC2CQ±01
N20239
Clamp Cool
± AIR CONDITIONINGAIR CONDITIONING CONTROL ASSEMBLY (Manual
A/C)AC±101
2589 Author: Date:
2001 CAMRY (RM819U)
INSTALLATION
Installation is in the reverse order of removal (See page
AC±95).
1. AFTER INSTALLATION INSPECT A/C CONTROL LE-
VER AND DIAL OPERATION
Move the control dial left and right and check fro stiffness and
binding through the full range of the dial.
If there is stiffness or binding, proceed next step.
2. ADJUST A/C CONTROL CABLE
(a) Set the temperature control dial in ºMAX. COOLº position.
(b) Adjust air mix control cable.
Set the cable connector to air mix link pin on left side of
A/C unit and clamp the cable outer on condition.
NOTICE:

Don't bend the cable on setting the cable.

Don't move the air mix nob before finishing on clamp-
ing the cable outer.

AC2810
AC0LG±02
AC2811
N11084
Wrong Okey
HI LO HILO
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC±1
2483 Author: Date:
AIR CONDITIONING SYSTEM
PRECAUTION
1. DO NOT HANDLE REFRIGERANT IN AN ENCLOSED
AREA OR WEAR EYE PROTECTION
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 REFRIGERATION SYS-
TEM
If there is not enough refrigerant in the refrigerant system oil lu-
brication will be insufficient and compressor burnout may occur,
so that care to avoid this, necessary care should be taken.
7. DO NOT OPEN PRESSURE MANIFOLD VALVE WHILE
COMPRESSOR IS OPERATE
If the high pressure valve is 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.

AC±2
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
2484 Author: Date:
9. SUPPLEMENTAL RESTRAINT SYSTEM (SRS)
The CAMRY is equipped with an SRS (Supplemental Restraint
System) such as the driver airbag and passenger airbag. Fail-
ure to carry out service operations the correct sequence could
cause the SRS to unexpectedly deployed during servicing, pos-
sible the SRS may fail to operate when required. Before servic-
ing (including removal or installation of parts, inspection or re-
placement), be sure to read the following item carefully, then
follow the correct procedure described in the repair manual.

AC0LI±02
N20242
Sight Glass
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC±3
2485 Author: Date:
ON±VEHICLE INSPECTION
1. INSPECT REFRIGERANT VOLUME
Observe the sight glass on the liquid tube.
Test conditions:

Running engine at 1,500 rpm

Blower speed control switch at ºHIº position

A/C switch ON

Temperature control dial at ºCOOLº position

Fully open the doors
ItemSymptomAmount of refrigerantRemedy
1Bubbles present in sight glassInsufficient*
(1) Check for gas leakage with gas leak de-
tector and repair if necessary
(2) Add refrigerant until bubbles disappear
2No bubbles present in sight glassNone, sufficient or too muchRefer item 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
4Temperature between compressor inlet and
outlet is noticeably differentCorrect or too muchRefer to items 5 and 6
5Immediately after air conditioning is turned
off, refrigerant in sight glass stays clearToo much
(1) Discharge refrigerant
(2) Evacuate air and charge proper amount
or purified refrigerant
6When air conditioning is turned off, refriger-
ant foams and then stays clearCorrect±
*: Bubbles in the sight glass with ambient temperatures higher than usual can be considered normal if cooling
is sufficient.

I01386
AC±4
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
2486 Author: Date:
2. INSPECT REFRIGERANT PRESSURE WITH MAN-
IFOLD GAUGE SET
This is a method in which the trouble is located by using a man-
ifold 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 1500 rpm

Blower speed control switch at ºHIº position

Temperature control dial on ºCOOLº position
HINT:
It should be noted that the gauge indications may vary slightly
due to ambient temperature conditions.
(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)

I01387
Condition : Periodically cools and then fails to cool
I01388
Condition: Insufficient cooling
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC±5
2487 Author: Date:
(2) Moisture present in refrigeration system.
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy
During operation, pressure on low
pressure side sometimes become
a vacuum and sometime normal
Moisture entered in refrigeration
system freezes at expansion valve
orifice and temporarily stops cycle,
but normal state is restored after a
time when the ice melts
Drier oversaturated state

Moisture in refrigeration system
freezes at expansion valve orifice
and blocks circulation of refriger-
ant(1) Replace receiver
(2) Remove moisture in cycle
through repeatedly evacuating air
(3) Charge proper amount of new
refrigerant
(3) Insufficient cooling
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Pressure low on both low and
high pressure sides

Bubbles seen in sight glass con-
tinuously

Insufficient cooling performance
Gas leakage at some place in re-
frigeration system
Insufficient refrigerant in system

Refrigerant leaking
(1) Check for gas leakage with gas
leak detector and repair if neces-
sary
(2) Charge proper amount of re-
frigerant
(3) If indicated pressure value is
near 0 when connected to gauge,
create the vacuum after inspecting
and repairing the location of the
leak

I01389
Condition: Insufficient cooling
I01449
Condition: Does not cool (Cools from time to time in some cases) AC±6
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
2488 Author: Date:
(4) Poor circulation of refrigerant
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Pressure low in both low and
high pressure sides

Frost on tube from receiver to
unit
Refrigerant flow obstructed by dirt
in receiverReceiver cloggedReplace receiver
(5) Refrigerant does not circulate
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

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 refrigeration sys-
tem

Refrigerant flow obstructed by
gas leakage from expansion valve
Refrigerant does not circulate
(1) Check expansion valve
(2) Clean out dirt in expansion
valve by blowing with air
(3) Replace receiver
(4) Evacuate air and charge new
refrigerant to proper amount
(5) For gas leakage from expan-
sion valve, replace expansion
valve

I01390
Condition: Insufficient cooling
I01392
Condition: Insufficient cooling
NOTE : These gauge indica-
tions are shown when the
refrigeration system has
been opened and the refrig-
erant charged without vacu-
um purging.
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
AC±7
2489 Author: Date:
(6) Refrigerant overcharged or insufficient cooling of
condenser
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Pressure too high on both low
and high pressure sides

No air bubbles seen through the
sight glass even when the engine
rpm is lowered
Unable to develop sufficient per-
formance due to excessive refrig-
eration system

Insufficient cooling of condenser
Excessive refrigerant in
cycle " refrigerant over charged

Condenser cooling " condenser
fins clogged of condenser fan
faulty
(1) Clean condenser
(2) Check condenser fan motor
operation
(3) If (1) and (2) are in normal
state, check amount of refrigerant
Charge proper amount of refriger-
ant
(7) Air present in refrigeration system
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Pressure too high on both low
and high pressure sides

The low pressure piping hot to
touch

Bubbles seen in sight glass
Air entered in refrigeration system

Air present in refrigeration sys-
tem

Insufficient vacuum purging
(1) Check compressor oil to see if
it is dirty or insufficient
(2) Evacuate air and charge new
refrigerant

I01450
Condition: Insufficient cooling
I01393
Condition : Does not cool AC±8
± AIR CONDITIONINGAIR CONDITIONING SYSTEM
2490 Author: Date:
(8) Expansion valve improperly
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Pressure too high on both low
and high pressure sides

Frost or large amount of dew on
piping on low pressure side
Trouble in expansion valve

Excessive refrigerant in low
pressure piping

Expansion valve opened too
wide
Check expansion valve
Replace if defective
(9) Defective compression compressor
Symptom seen in
refrigeration systemProbable causeDiagnosisRemedy

Pressure too high on low and
high pressure sides

Pressure too low on high pres-
sure side
Internal leak in compressor

Compression defective

Valve leaking or broken sliding
parts
Repair or replace compressor