Camry Repair Manual AIR CONDITION

Camry Repair Manual

AREA OR WEAR EYE PROTECTION

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 professionaltreatment

FLAME

TO APPLY PHYSICAL SHOCKS TO IT

ENOUGH REFRIGERANT IN REFRIGERATION TEM

SYS-If there is not enough refrigerant in the refrigerant system oil brication will be insufficient and compressor burnout may occur,

lu-so that care to avoid this, necessary care should be taken

COMPRESSOR IS OPERATE

If the high pressure valve is opened, refrigerant flows in the verse direction and could cause the charging cylinder to rup-ture, so open and close the only low pressure valve

REFRIGERANT

If refrigerant is overcharged, it causes problems such as cient cooling, poor fuel economy, engine overheating etc

insuffi-9 SUPPLEMENTAL RESTRAINT SYSTEM (SRS)

The CAMRY is equipped with an SRS (Supplemental RestraintSystem) such as the driver airbag and passenger airbag Fail-ure to carry out service operations the correct sequence couldcause 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, thenfollow the correct procedure described in the repair manual

Observe the sight glass on the liquid tube.

Test conditions:

Running engine at 1,500 rpm

Blower speed control switch at ”HI” position

A/C switch ON

Temperature control dial at ”COOL” position

Fully open the doors

1 Bubbles present in sight glass Insufficient*

(1) Check for gas leakage with gas leak tector and repair if necessary

de-(2) Add refrigerant until bubbles disappear

2 No bubbles present in sight glass None, sufficient or too much Refer item 3 and 4

3 No temperature difference between

com-pressor inlet and outlet Empty or nearly empty

(1) Check for gas leakage with gas leak tector and repair if necessary

de-(2) Add refrigerant until bubbles disappear

4 Temperature between compressor inlet and

outlet is noticeably different Correct or too much Refer to items 5 and 6

5 Immediately after air conditioning is turned

off, refrigerant in sight glass stays clear Too much

(1) Discharge refrigerant (2) Evacuate air and charge proper amount

or purified refrigerant

6 When air conditioning is turned off,

*: Bubbles in the sight glass with ambient temperatures higher than usual can be considered normal if cooling

is sufficient

MAN-IFOLD GAUGE SET

This is a method in which the trouble is located by using a ifold gauge set Read the manifold gauge pressure when thethese conditions are established

man-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 ”HI” position

Temperature control dial on ”COOL” positionHINT:

It should be noted that the gauge indications may vary slightlydue to ambient temperature conditions

(1) Normally functioning refrigeration system

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

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 frigeration system

re-
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 frigerant

re-(3) If indicated pressure value is near 0 when connected to gauge, create the vacuum after inspecting and repairing the location of the leak

Condition: Insufficient cooling

I01449

Condition: Does not cool (Cools from time to time in some cases)

(4) Poor circulation of refrigerant

Symptom seen in

Pressure low in both low and

high pressure sides

Frost on tube from receiver to

unit

Refrigerant flow obstructed by dirt

in receiver Receiver clogged Replace receiver

(5) Refrigerant does not circulate

Symptom seen in

Vacuum indicated on low

pres-sure side, very low prespres-sure

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

Condition: Insufficient cooling

I01392

Condition: Insufficient cooling

NOTE : These gauge tions are shown when therefrigeration system hasbeen opened and the refrig-erant charged without vacu-

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 formance due to excessive refrig- eration system

per-
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

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 tem

sys-
Insufficient vacuum purging

(1) Check compressor oil to see if

it is dirty or insufficient (2) Evacuate air and charge new refrigerant

Condition: Insufficient cooling

I01393

Condition : Does not cool

(8) Expansion valve improperly

Symptom seen in

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

Pressure too high on low and

high pressure sides

Pressure too low on high

AIR CONDITIONING AIR CONDITIONING SYSTEM

AC–9

(a) Warm up engine

(b) Inspect idle–up speed when the these conditions are tablished

es-
Warm up engine

Blower speed control switch at ”HI” position

A/C switch ON

Temperature control dial at ”COOL” position

Magnetic clutch condition Idle–up speed Magnetic clutch not engaged 700 ± 50 rpm Magnetic clutch engaged 700 ± 50 rpm

If idle speed is not as specified, check ISC valve and air intakesystem

(a) Perform in these conditions:

Stop engine

Secure good ventilation (If not the gas leak detectormay react to volatile gases witch are not refrigerant,such as evaporated gasoline and exhaust gas.)

Repeat the test 2 or 3 times

Make sure that there is some refrigerant remaining

in the refrigeration system

When compressor is OFF: approx 392 – 588 kPa(4 – 6 kgf/ cm2, 57 – 85 psi)

(b) Bring the gas leak detector close to the drain hose beforeperforming the test

If such reaction is unavoidable, the vehicle must be lifted up.(c) If gas leak is not detected on the drain hose, remove theblower resistor from the cooling unit Then insert the gasleak detector sensor into the unit and perform the test.(d) Disconnect the connector and leave the pressure switchfor approx 20 minutes Then bring the gas leak detectorclose to the pressure switch and perform the test.(e) Bring the gas leak detector close to the refrigerant linesand perform the test

(a) Close both hand valves of manifold gauge set.

(b) Connect the quick disconnect adapters to the servicevalves

(a) Connect the vacuum pump adapter to the vacuum pump

(b) Connect the center hose of the manifold gauge set to thevacuum pump adapter

(c) Open both the high and low hand valves and run the

(e) Close both the high and low hand valves and stop the uum pump

vac-(f) Leave the system in this condition for 5 minutes or moreand check that there is no gauge indicator

(c) Open the valve of charging cylinder.

(d) Press the valve core on the side of manifold gauge andexpel the air inside of the center hose

(a) Open the high pressure hand valve and charge ant

refriger-(b) When the low pressure gauge indicates 98 kPa (1 kgf/cm2, 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.

through the high pressure side.

system is being charged with liquid refrigerant.

(a) Open the high pressure hand valve fully

(b) Charge specified amount of refrigerant, then close thehigh pressure hand valve

Blower speed control set at ”HI”

Temperature control set at ”MAX COOL”

Air inlet control set at ”RECIRC”

Fully open doors (Sliding roof: closed)(2) Open the low pressure hand valve

CAUTION:

Do not open the high pressure hand valve.

(d) Charge refrigerant until bubbles disappear and check thepressure on the gauge through the sight glass

Engine Room Junction Block No 2

Engine Main Relay(Marking: ENGINE MAIN)

No 1 Cooling Fan Relay(Marking: FAN NO.1)

Engine Room Relay Block No 1

Magnetic Clutch Relay(Marking: MG CLT)

Heater Main Relay(Marking: HTR)

No 2 Cooling Fan Relay(Marking: FAN NO.2)

No 3 Cooling Fan Relay(Marking: FAN NO.3)

5S–FE engine models:

Engine Coolant Temperature(ECT) Switch

A/C Control Assembly

TROUBLESHOOTING

PROBLEM SYMPTOMS TABLE

Use the table below to help you find the cause of the problem The numbers indicate the priority of the likelycause of the problem Check each part in order If necessary, replace these parts

–

No air temperature control 1 Engine coolant volume

2 A/C control assembly

–

AC–80

No air outlet control

8 Heater main relay

9 Blower speed control switch 10.A/C switch

11.*1 ECM

* 2 A/C amplifier 12.Wire harness

AC–3

– –

AC–71 AC–39 AC–39 AC–67 AC–70 AC–84 AC–84 DI–218 AC–88

*2 A/C amplifier 11.Wire harness

AC–3 AC–3 AC–16 AC–16 AC–39 AC–39 AC–67 AC–24 AC–84 DI–218 AC–88

–

* 2 A/C amplifier

AC–3 AC–16 AC–16 AC–39 AC–52 AC–74 AC–49 AC–59 AC–30 AC–24 AC–21 AC–67 DI–218 AC–88

No engine idle–up when A/C switch ON

1 * 1 ECM

* 2 A/C amplifier

2 Wire harness

DI–218 AC–88

A/C indicator does not lights up when turn mode switch to DEF.

–

No warm air comes out

1 Engine coolant volume

2 A/C control assembly

3 Heater radiator

–

AC–80 AC–57

No condenser fan operation

1 CDS FAN Fuse

2 Engine main relay

3 Cooling fan relay No 1

4 Cooling fan relay No 2

5 Cooling fan relay No 3

6 Condenser fan motor

7 Pressure switch

8 * 1 Engine coolant temp switch

* 2 No 1 Engine coolant temp switch

9 * 2 No 2 Engine coolant temp switch 10.Wire harness

– –

AC–72 AC–72 AC–72 AC–74 AC–67 AC–92 AC–92 AC–92

–

*1: 5S–FE Engine Models

*2: 1MZ–FE Engine Models

Check that the drive belt fits properly in the ribbed grooves.

Using a belt tension gauge, check the drive belt tension

Drive belt tension:

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 ning engine for 5 minutes or more

run-
After installing the drive belt, check that it fits properly inthe ribbed grooves

AIR CONDITIONING DRIVE BELT

AC–17

REMOVAL

REMOVE DRIVE BELT

(a) Loosen the pivot bolt and adjusting lock bolt

Torque:

5S–FE:

Pivot bolt: 52 N·m (530 kgf·cm, 38 ft·lbf) Adjusting lock bolt: 18 N·m (185 kgf·cm, 13 ft·lbf) 1MZ–FE:

Pivot bolt: 56 N·m (570 kgf·cm, 41 ft·lbf) Adjusting lock bolt: 18 N·m (185 kgf·cm, 13 ft·lbf)

(b) Loosen the drive belt tension by adjusting bolt and move the drive belt

INSTALLATION

High Pressure Charging hose

Do not connect the wrong hoses.

CHARGING HOSES

Tighten the nuts by hand

FROM SERVICE VALVES ON REFRIGERANT LINE

Using a gas leak detector, check for leakage of refrigerant.

LOCATION

AC0LT–03 –

AIR CONDITIONING REFRIGERANT LINE

AC–23

REPLACEMENT

NOTICE:

Cap the open fittings immediately to keep moisture or dirt out of the system.

NOTICE:

Connections should not be torqued tighter than the specified torque.

Using a gas leak detector, check for leakage of refrigerant

(a) Remove glove compartment (See page BO–75).

(b) Remove the blower resistor

(1) Disconnect the connector

(2) Remove the 2 screws and blower resistor

(c) Using a gas leak detector, check for leakage

If there is leakage, check the tightening torque at the joints orcheck the evaporator

(d) Install the blower resistor

(e) Install the lower No 2 finish panel (See page BO–81)

(a) Disconnect the connector

(b) Measure resistance between terminals

If resistance is not as specified, replace the thermistor

Piping Clamp

O–ring

O–ring

Air Duct (Rear Foot)

Air Duct (Foot)

Heater Protector

Heater RadiatorPipe

It is not necessary to drain out all the coolant

At the time of installation, please refer to the following items

Push the water hose onto the heater radiator pipe as far

as ridge on the pipe and install the hose clip

Install the hose clip in a position, as shown in the tion

(a) Using SST, remove the 2 piping clamps

SST 09870–00015 (Suction tube)

09870–00025 (Liquid tube)

Disconnect the tube

using hand

ScrewDriver

Be careful not to deform the tubes, when pushing SST.

(3) Pull SST slightly and push the release lever, then move the piping clamp with SST

re-(4) Remove the piping clamp from SST

(b) Disconnect the both tubes

NOTICE:

dirt out of the system.

HINT:

At the time of installation, please refer to the following item

Lubricate 4 new O–rings with compressor oil and installthe tubes

After connection, check the fitting for claw of the pipingclamp

(a) Disconnect the connector

(b) Slide the floor carpet backward

(c) Remove the rear heater duct

(d) Remove the 2 nuts and A/C unit

(a) Release the claw and pull out the plate.

(b) Remove the 3 screws and servomotor

(a) Remove the 3 screws and 3 plates

(b) Remove the 2 clips and heater radiator pipes

(c) Pull out the heater radiator

(a) Remove piping clamp

(b) Remove the packings

(c) Using a hexagon wrench (5.0 mm, 0.20 in.), remove the

2 bolts and separate the expansion valve and evaporator

(a) Remove the grommet from the evaporator

(b) Using a knife, cut off each packings

HINT:

Do not reuse the packing

(c) Remove the 13 screws and separate the heater cases,then remove the evaporator and water seal

(d) Release the 4 claws and remove the plate from the orator

Pull out the thermistor with the holders

If the fins are clogged, clean them with compressed air

NOTICE:

Never use water to clean the evaporator.

Repair as necessary

(a) Place the thermistor in cold water, and while changing thetemperature of water, measure resistance at the connec-tor and at the same time, measure temperature of waterwith a thermometer

(b) Compare the 2 readings on the chart

If resistance value is not as specified, replace the thermistor

(a) Install the plate to the evaporator.

(b) Install the evaporator on the insulator

(c) Connect the heater case with the 13 screws

NOTICE:

The packing for water seal should be replaced, with a new one when the A/C unit is reassembled.

(d) Install the 2 new packings

(e) Install the grommet to evaporator

HINT:

If evaporator is replaced, add compressor oil to the compressor

Add 40 – 50 cc (1.4 – 1.7 fl.oz.) Compressor oil: ND – OIL 8 or equivalent

(a) Lubricate 2 new O–rings with compressor oil and installthe tubes

(b) Install the liquid tube and suction tube on the expansionvalve

(c) Using a knife, cut off packing paper of packing while peeloff the paper, as shown in the illustration

When installing the expansion valve, take care so that the packing is not jammed with the evaporator.

(g) Peel off the remaining packing paper and apply the ing to expansion valve

(a) Install the heater radiator to heater case

(b) Install the heater radiator pipe with 2 clips

(c) Install the 3 clamps with the 3 screws

(a) Install the servomotor with the 3 screws

(b) Insert the drain of the plate to the pin and install plate

AC0LY–01 –

AIR CONDITIONING AIR CONDITIONING UNIT

AC–33

INSTALLATION

Foot Air Duct

No.2 Lower Cover

Blower Unit Cowl Side Trim

Blower Motor Connector

Blower MotorBlower Unit Case

Air Inlet DamperControl Cable

1MZ–FE engine:

A/C Amplifier

Front Door Inside ScuffPlateBlower Resistor

Connecter

Blower Resistor

BLOWER UNIT

COMPONENTS

AC0M0–02 –

AIR CONDITIONING BLOWER UNIT

AC–35

REMOVAL

(a) Disconnect the connectors

(b) Remove the 2 nuts and ECM

HINT:

At the in time of installation, please refer to following item

After connection, inspect the air inlet control lever operation

(See page AC–87)

(a) Disconnect the connector

(b) Release the 2 claws and pull out the amplifier

(a) Disconnect the connector

(b) Disconnect the thermistor connector clamp

(c) Remove the 2 screws, bolt and nut, then remove the blower unit

DISASSEMBLY

Remove the 3 screws and blower motor

Remove the 2 screws and blower resistor

AC0M2–01 –

AIR CONDITIONING BLOWER UNIT

AC–37

REASSEMBLY

INSTALLATION

(a) Start engine.

(b) Check if there is a metallic sound from the compressorwhen the A/C switch is on

If metallic sound is heard, replace the compressor assembly

See ”ON–VEHICLE INSPECTION” of AIR CONDITIONINGSYSTEM on page AC–3

RESIS-TANCE

(a) Disconnect the connector

(b) Measure resistance between terminals 1 and 2

If resistance is not as specified, replace the compressor bly

REFRIGER-ANT FROM SAFETY SEAL

Using a gas leak detector, check for leakage of refrigerant

If there is any leakage, replace the compressor assembly

BEARING

ROTOR

(a) Start engine

(b) Check for abnormal noise from near the compressorwhen the A/C switch is OFF

If abnormal noise is being emitted, replace the magnetic clutch

(a) Disconnect the connector

(b) Connect the positive (+) lead from the battery to terminal

4 and the negative (–) lead to the body ground

(c) Check that the magnetic clutch is energized

If operation is not as specified, replace the magnetic clutch

(a) Start engine.

(b) Check if there is a metallic sound from the compressorwhen the A/C switch is on

If metallic sound is heard, replace the compressor assembly

See ”ON–VEHICLE INSPECTION” of AIR CONDITIONINGSYSTEM on page AC–3

RESIS-TANCE

(a) Disconnect the connector

(b) Measure resistance between terminals 1 and 2

If resistance is not as specified, replace the compressor bly

REFRIGER-ANT FROM SAFETY SEAL

Using a gas leak detector, check for leakage of refrigerant

If there is any leakage, replace the compressor assembly

BEARING

ROTOR

(a) Start engine

(b) Check for abnormal noise from near the compressorwhen the A/C switch is OFF

If abnormal noise is being emitted, replace the magnetic clutch

(a) Disconnect the connector

(b) Connect the positive (+) lead from the battery to terminal

4 and the negative (–) lead to the body ground

(c) Check that the magnetic clutch is energized

If operation is not as specified, replace the magnetic clutch