Content .. 229 230 231 232 ..

Juke F15 (2012 year). Service Repair Manual - part 231

COMPONENT PARTS

HA-69

< SYSTEM DESCRIPTION >

[MR16DDT ]

SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

INFOID:0000000006485635

Component Description

INFOID:0000000006485636

JMIIA1124ZZ

Expansion valve

Condenser

Compressor

Liquid tank

Refrigerant pressure sensor

Evaporator

Built-in heater & cooling unit assem-
bly

Component

Description

Evaporator

The mist form liquid refrigerant transforms to gas by evaporation by the air conveyed from blower
motor. The air is cooled by the heat by evaporation.

Condenser

Cools refrigerant discharged from compressor, and transforms it to liquid refrigerant.

Compressor

Intakes, compresses, and discharges refrigerant, to circulate refrigerant inside the refrigerant cycle.

Refrigerant pressure sensor

Refer to

EC-43, "Refrigerant Pressure Sensor"

Liquid tank

Eliminates foreign matter in refrigerant, and stores temporarily liquid refrigerant.

Expansion valve

Transforms high-pressure liquid refrigerant to mist form low-pressure liquid refrigerant by drawing
function.

HA-70

< SYSTEM DESCRIPTION >

[MR16DDT ]

SYSTEM

SYSTEM

System Diagram

INFOID:0000000006485637

System Description

INFOID:0000000006485638

REFRIGERANT CYCLE

Refrigerant Flow

The refrigerant from the compressor, flows the condenser with liquid tank, the evaporator, and returns to the
compressor. The refrigerant evaporation in the evaporator is controlled by an expansion valve.

Freeze Protection

Automatic air conditioner

• When intake sensor detects that evaporator surface temperature is 2

C (36

F) or less, A/C auto amp.

requests BCM to turn the compressor OFF.

• BCM requests ECM to turn the compressor to OFF by the signal from A/C auto amp., and ECM makes A/C

relay to OFF, and stops the compressor.

Manual air conditioner

• When thermo control amp. detects that evaporator surface temperature becomes 2

C (36

F) or less, BCM

requests ECM to turn the compressor OFF, and stops the compressor.

REFRIGERANT SYSTEM PROTECTION

Refrigerant Pressure Sensor

• The refrigerant system is protected against excessively high- or low-pressures by the refrigerant pressure

sensor, installed at the condenser exit. The refrigerant pressure sensor detects the pressure inside the
refrigerant line and sends the voltage signal to the ECM if the system pressure rises above, or falls below
the specifications.

• ECM turns the A/C relay to OFF and stops the compressor when the high-pressure side detected by refriger-

ant pressure sensor is following conditions;

- Approximately 3,120 kPa (31.2 bar, 31.8 kg/cm

, 452 psi) or more (Engine speed is less than 1,500 rpm.)

- Approximately 2,740 kPa (27.4 bar, 27.9 kg/cm

, 397 psi) or more (Engine speed is 1,500 rpm or more.)

- Approximately 120 kPa (1.2 bar, 1.2 kg/cm

, 17 psi) or less

JPIIA1366GB

SYSTEM

HA-71

< SYSTEM DESCRIPTION >

[MR16DDT ]

Pressure Relief Valve

The refrigerant system is also protected by a pressure relief valve, located in the rear head of the compressor.
The release port on the pressure relief valve automatically opens and releases refrigerant into the atmosphere
when the pressure of refrigerant in the system increases to an unusual level [more than 3,800 kPa (38 bar,
38.8 kg/cm

, 551 psi)].

HA-72

< BASIC INSPECTION >

[MR16DDT ]

DIAGNOSIS AND REPAIR WORKFLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000006485639

OVERALL SEQUENCE

DETAILED FLOW

INTERVIEW FOR MALFUNCTION

Interview the symptom to the customer.

NNIIA0143GB

DIAGNOSIS AND REPAIR WORKFLOW

HA-73

< BASIC INSPECTION >

[MR16DDT ]

>> GO TO 2.

SYMPTOM CHECK

Check the symptom from the customer's information. Check that any symptom occurs other than the inter-
viewed symptom.

Insufficient cooling/heating>>GO TO 3.
Refrigerant leakage>>GO TO 6.
Noise >> GO TO 7.

CONTROL SYSTEM DIAGNOSIS

Perform the system diagnosis for the A/C control system.
• Refer to

HAC-44, "Work Flow"

. (AUTOMATIC AIR CONDITIONING: 4WD models)

• Refer to

HAC-135, "Work Flow"

. (AUTOMATIC AIR CONDITIONING: 2WD models)

• Refer to

HAC-216, "Work Flow"

. (MANUAL AIR CONDITIONING: 4WD models)

• Refer to

HAC-271, "Work Flow"

. (MANUAL AIR CONDITIONING: 2WD models)

Is A/C control system normal?

YES

>> GO TO 4.

>> GO TO 8.

PERFORMANCE TEST

Perform the performance test. Check the operation of each part. Refer to

HA-81, "Inspection"

>> GO TO 5.

TROUBLE DIAGNOSIS FOR UNUSUAL PRESSURE

Diagnose using a manifold gauge whenever system's high and/or low side pressure(s) is/are unusual. Specify
the malfunctioning part. Refer to

HA-83, "Symptom Table"

Low refrigerant charge>>GO TO 6.
Except above>>GO TO 8.

CHECK REFRIGERANT FOR LEAKAGES

Check refrigerant for leakages. Specify the malfunctioning part. Refer to

HA-74, "Leak Test"

>> GO TO 8.

TROUBLE DIAGNOSIS FOR NOISE

Perform trouble diagnosis for noise. Specify the malfunctioning part. Refer to

HA-85, "Symptom Table"

>> GO TO 8.

MALFUNCTION PART REPAIR

Repair or replace the malfunctioning part.

>> GO TO 9.

REPAIR CHECK (OPERATION CHECK)

Check the operation of each part.

Does it operate normally?

YES

>> INSPECTION END

>> GO TO 2.

HA-74

< BASIC INSPECTION >

[MR16DDT ]

REFRIGERANT

REFRIGERANT

Description

INFOID:0000000006485640

CONNECTION OF SERVICE TOOLS AND EQUIPMENT

Leak Test

INFOID:0000000006485641

CHECK REFRIGERANT LEAKAGE USING FLUORESCENT LEAK DETECTION DYE

Install a fender cover (1).

Wear UV safety goggles (2) provided with refrigerant dye leak detection kit.

Connect power cable (4) of UV lamp (6) to positive and negative terminals of the battery (3).

Press UV lamp switch (5) and check A/C system for refrigerant leakage. (Where refrigerant leakage
occurs, fluorescent leak detection dye appears in green color.)

WARNING:

Shut-off valve

A/C service valve

Recovery/recycling/recharging
equipment

Vacuum pump

Manifold gauge set

Refrigerant container (HFC-134a)

Weight scale

Preferred (best) method

Alternative method

For charging

JSIIA0258ZZ

RJIA3815J

REFRIGERANT

HA-75

< BASIC INSPECTION >

[MR16DDT ]

Never look directly into UV lamp light source.
NOTE:
• For continuous operating time of UV lamp, follow the manufacturer operating instructions.
• Illuminate piping joints from different angles using UV lamp and check that there is no leakage.
• Use a mirror in area that is difficult to see to check refrigerant leakage.
• Refrigerant leakage from evaporator can be detected by soaking cotton swab or a similar material with

drain hose water and illuminating it using UV lamp.

• Dust, dirt, and packing materials adhesive used for condenser, evaporator, and other locations may flu-

oresce. Be careful not to misidentify leakage.

Repair or replace parts where refrigerant leakage occurs and wipe off fluorescent leak detection dye.
NOTE:
Completely wipe off fluorescent leak detection dye from gaps between parts, screw threads, and others
using a cotton swab or similar materials.

Use a UV lamp to check that no fluorescent leak detection dye remains after finishing work.

WARNING:

Never look directly into UV lamp light source.
NOTE:
• For continuous operating time of UV lamp, follow the manufacturer operating instructions.
• Dust, dirt, and packing materials adhesive used for condenser, evaporator, and other locations may flu-

oresce. Be careful not to misidentify leakage.

CHECK REFRIGERANT LEAKAGE USING ELECTRICAL LEAK DETECTOR

WARNING:

Never check refrigerant leakage while the engine is running.

CAUTION:

Be careful of the following items so that inaccurate checks or misidentifications are avoided.
• Never allow refrigerant vapor, shop chemical vapors, cigarette smoke, or others around the vehicle.
• Always check refrigerant leakage in a low air flow environment so that refrigerant may not disperse

when leakage occurs.

Stop the engine.

Connect recovery/recycling/recharging equipment or manifold gauge set to A/C service valve.

Check that A/C refrigerant pressure is 345 kPa (3.45 bar, 3.52 kg/cm

, 50 psi) or more when temperature

is 16

C (61

F) or more. When pressure is lower than the specified value, recycle refrigerant completely

and fill refrigerant to the specified level.
NOTE:
Leakages may not be detected if A/C refrigerant pressure is 345 kPa (3.45 bar, 3.52 kg/cm

, 50 psi) or

less when temperature is less than 16

C (61

F).

Clean area where refrigerant leakage check is performed, and check refrigerant leakage along all sur-
faces of pipe connections and A/C system components using electrical leak detector probe.

CAUTION:

• Continue checking when a leakage is found. Always continue and complete checking along all

pipe connections and A/C system components for additional leakage.

• When a leakage is detected, clean leakage area using compressed air and check again.
• When checking leakage of cooling unit inside, always clean inside of drain hose so that the

probe surface may not be exposed to water or dirt.

NOTE:
• Always check leakage starting from high-pressure side and continue to low-pressure side.
• When checking leakage of cooling unit inside, operate blower fan motor for 15 minutes or more at the

maximum fan speed while the engine is stopped, and then insert electrical leak detector probe into drain
hose and hold for 10 minutes or more.

• When disconnecting shut-off valve that is connected to A/C service valve, always evacuate remaining

refrigerant so that misidentification can be avoided.

Repair or replace parts where refrigerant leakage is detected. (Leakage is detected but leakage area is
unknown. GO TO 6.)

Start the engine and set A/C control in the following conditions.
• A/C switch ON
• Air flow: VENT (ventilation)
• Intake door position: Recirculation

HA-76

< BASIC INSPECTION >

[MR16DDT ]

REFRIGERANT

• Temperature setting: Full cold
• Fan speed: Maximum speed set

Run the engine at approximately 1,500 rpm for 2 minutes or more.

Stop the engine. Check again for refrigerant leakage. GO TO 4.

WARNING:

Be careful not to get burned when the engine is hot.
NOTE:
• Start refrigerant leakage check immediately after the engine is

stopped.

• When refrigerant circulation is stopped, pressure on the low-

pressure side rises gradually, and after this, pressure on the
high-pressure side falls gradually.

• The higher the pressure is, the easier it is to find the refriger-

ant leakage.

Recycle Refrigerant

INFOID:0000000006485642

WARNING:

• Always use HFC-134a for A/C refrigerant. If CFC-12 is accidentally charged, compressor is damaged

due to insufficient lubrication.

• Always observe and follow precautions described on refrigerant container. Incorrect handling may

result in an explosion of refrigerant container, frostbite, or the loss of eyesight.

• Never breathe A/C refrigerant and lubricant vapor or mist. Exposure may irritate eyes, nose, or

throat.

• Never allow HFC-134a to be exposed to an open flame or others because it generates poisonous gas

when in contact with high temperature objects. Keep workshop well ventilated.

Perform lubricant return operation. Refer to

HA-78, "Perform Lubricant Return Operation"

. (If refrigerant or

lubricant leakage is detected in a large amount, omit this step, and then GO TO 2.)

CAUTION:

Never perform lubricant return operation if a large amount of refrigerant or lubricant leakage is
detected.

Check gauge pressure readings of recovery/recycling/recharging equipment. When remaining pressure
exists, recycle refrigerant from high-pressure hose and low-pressure hose.
NOTE:
Follow manufacturer instructions for the handling or maintenance of the equipment. Never fill the equip-
ment with non-specified refrigerant.

Remove A/C service valve cap from the vehicle.

Connect recovery/recycling/recharging equipment to A/C service valve.

Operate recovery/recycling/recharging equipment, and recycle refrigerant from the vehicle.

Evacuate air for 10 minutes or more to remove any remaining refrigerant integrated to compressor lubri-
cant, etc.

Refrigerant recycle operation is complete.

Charge Refrigerant

INFOID:0000000006485643

WARNING:

• Always use HFC-134a for A/C refrigerant. If CFC-12 is accidentally charged, compressor is damaged

due to insufficient lubrication.

• Always observe and follow precautions described on refrigerant container. Incorrect handling may

result in an explosion of refrigerant container, frostbite, or the loss of eyesight.

• Never breathe A/C refrigerant and lubricant vapor or mist. Exposure my irritate eyes, nose, or throat.
• Never allow HFC-134a to be exposed to an open flame or others because it generates poisonous gas

when in contact with high temperature objects. Keep workshop well ventilated.

Connect recovery/recycling/recharging equipment to the A/C service valve.

SHA839E

REFRIGERANT

HA-77

< BASIC INSPECTION >

[MR16DDT ]

Operate recovery/recycling/recharging equipment, and evacuate air from A/C system for 25 minutes or
more.

CAUTION:

Evacuate air for 15 minutes or more if the parts are replaced.

Check the airtightness of A/C system for 25 minutes or more. If pressure rises more than the specified
level, charge A/C system with approximately 200 g (0.4 lb) refrigerant and check that there is no refriger-
ant leakage. Refer to

HA-74, "Leak Test"

CAUTION:

Check the airtightness for 15 minutes or more if the parts are replaced.

If parts other than compressor are replaced, fill compressor lubricant according to parts that are replaced.

Charge the specified amount of refrigerant to A/C system.

Check that A/C system operates normally.

Disconnect recovery/recycling/recharging equipment. (Collect the refrigerant from the high-pressure hose
and low-pressure hose of recovery/recycling/recharging equipment.)

Install A/C service valve cap.

Refrigerant charge is complete.

HA-78

< BASIC INSPECTION >

[MR16DDT ]

LUBRICANT

LUBRICANT

Description

INFOID:0000000006485644

MAINTENANCE OF LUBRICANT LEVEL

The compressor lubricant is circulating in the system together with the refrigerant. It is necessary to fill com-
pressor with lubricant when replacing A/C system parts or when a large amount of refrigerant leakage is
detected. It is important to always maintain lubricant level within the specified level. Otherwise, the following
conditions may occur.
• Insufficient lubricant amount: Stuck compressor
• Excessive lubricant amount: Insufficient cooling (caused by insufficient heat exchange)

Inspection

INFOID:0000000006485645

If a compressor is malfunctioning (internal noise, insufficient cooling), check the compressor oil.

COMPRESSOR OIL JUDGMENT

Remove the compressor. Refer to

HA-87, "COMPRESSOR : Removal and Installation"

Sample a compressor oil and judge on the figure.

Judgement result 1>>Replace compressor only.
Judgement result 2>>Replace compressor and liquid tank.

Perform Lubricant Return Operation

INFOID:0000000006485646

CAUTION:

If a large amount of refrigerant or lubricant leakage is detected, never perform lubricant return opera-
tion.

Start the engine and set to the following conditions.
• Engine speed: Idling to 1,200 rpm
• A/C switch: ON
• Fan speed: Maximum speed set
• Intake door position: Recirculation
• Temperature setting: Full cold

Perform lubricant return operation for approximately 10 minutes.

Stop the engine.

Lubricant return operation is complete.

Lubricant Adjusting Procedure for Components Replacement Except Compressor

INFOID:0000000006485647

Fill with lubricant for the amount that is calculated according to the following conditions.
Example: Lubricant amount to be added when replacing evaporator and liquid tank [m (Imp fl oz.)] = 35 (1.2)
+ 5 (0.2) +

Name

: A/C system Oil Type R

JSIIA0927GB

LUBRICANT

HA-79

< BASIC INSPECTION >

[MR16DDT ]

Lubricant Adjusting Procedure for Compressor Replacement

INFOID:0000000006485648

Drain lubricant from removed compressor and measure lubricant amount.
1.

Drain lubricant from high-pressure port (A) and low-pres-
sure port (B) while rotating magnet clutch.

Measure total amount of lubricant that is drained from
removed compressor.

Drain lubricant from a new compressor that is calculated accord-
ing to the following conditions.

CAUTION:

If lubricant amount that is drained from removed compressor is less than 60 m (2.1 Imp fl oz.),
perform calculation by setting “D” as 40 m (1.4 Imp fl oz.).

Example: Lubricant amount to be drained from a new compressor when replacing compressor and liquid
tank [m (Imp fl oz.)] [D = 60 (2.1),

= 5 (0.2)]

120 (4.2)

−

[60 (1.6) + 20 (0.7) + 5 (0.2) + 5 (0.2)] = 30 (1.0)

Conditions

Lubricant amount to be added to A/C system

(Imp fl oz.)

Replace evaporator

35 (1.2)

Replace condenser

15 (0.5)

Replace liquid tank

5 (0.2)

Refrigerant leakage is detected

Large amount leakage

30 (1.1)

Small amount leakage

—

Lubricant amount that is recycled together with refrigerant during recycle operation

JMIIA0940ZZ

Amount to be drained (A) [m (Imp fl oz.)] = F

−

+ S + R +

)

: Lubricant amount that a new compressor
contains [120 (4.2)]

: Lubricant amount that is drained from re-
moved compressor

: Lubricant amount that remains inside of re-
moved compressor [20 (0.7)]

: Lubricant amount to be added according to
components that are removed except com-
pressor

: Lubricant amount that is recycled together
with refrigerant during recycle operation

Conditions

Lubricant amount to be added to A/C system

(Imp fl oz.)

Replace evaporator

35 (1.2)

Replace condenser

15 (0.5)

Replace liquid tank

5 (0.2)

JPIIA1455GB

HA-80

< BASIC INSPECTION >

[MR16DDT ]

LUBRICANT

Install compressor and check the operation.

PERFORMANCE TEST

HA-81

< BASIC INSPECTION >

[MR16DDT ]

PERFORMANCE TEST

Inspection

INFOID:0000000006485649

INSPECTION PROCEDURE

Connect recovery/recycling/recharging equipment (for HFC-134a) or manifold gauge.

Start the engine, and set to the following condition.

Test condition

Maintain test condition until A/C system becomes stable. (Approximately 10 minutes)

Check that test results of “recirculating-to-discharge air temperature” and “ambient air temperature-to-
operating pressure” are within the specified value.

When test results are within the specified value, inspection is complete.
If any of test result is out of the specified value, perform diagnosis by gauge pressure. Refer to

HA-83,

"Symptom Table"

RECIRCULATING-TO-DISCHARGE AIR TEMPERATURE TABLE

AMBIENT AIR TEMPERATURE-TO-OPERATING PRESSURE TABLE

Surrounding condition

Indoors or in the shade (in a well-ventilated place)

Vehicle condition

Door

Closed

Door glass

Full open

Hood

Open

Engine speed

Idle speed

A/C condition

Temperature control switch or dial

Full cold

A/C switch

Air outlet

VENT (ventilation)

Intake door position

Recirculation

Fan speed

Maximum speed set

Inside air (Recirculating air) at blower assembly inlet

Discharge air temperature from center ventilator

C (

Relative humidity

Air temperature

C (

50 – 60

20 (68)

3.6 – 5.6 (38 – 42)

25 (77)

9.3 – 11.8 (49 – 53)

30 (86)

12.9 – 15.9 (55 – 61)

35 (95)

19.4 – 22.9 (67 – 73)

60 – 70

20 (68)

5.6 – 7.6 (42 – 46)

25 (77)

11.8 – 14.3 (53 – 58)

30 (86)

15.9 – 18.9 (61 – 66)

35 (95)

22.9 – 26.4 (73 – 80)

HA-82

< BASIC INSPECTION >

[MR16DDT ]

PERFORMANCE TEST

Fresh air

High-pressure (Discharge side)

kPa (bar, kg/cm

, psi)

Low-pressure (Suction side)

kPa (bar, kg/cm

, psi)

Relative humidity

Air temperature

C (

50 – 70

25 (77)

1,085 – 1,112

(10.9 – 11.1, 11.1 – 11.3, 157.3 –

161.2)

198 – 243

(1.9 – 2.4, 2.0 – 2.5, 28.7 – 35.2)

30 (86)

1,326 -– 1,620

(13.3 – 16.2, 13.5 – 16.5, 192.2 –

234.9)

260 – 318

(2.6 – 3.2, 2.7 – 3.2, 37.7 – 46.1)

35 (95)

1,482 – 1,811

(14.8 – 18.1, 15.1 – 18.5, 214.9 –

262.6)

314 – 384

(3.1 – 3.8, 3.2 – 3.9, 45.5 – 55.7)

40 (104)

1,812 – 2,214

(18.1 – 22.1, 18.5 – 22.6, 262.7 –

321.0)

419 – 512

(4.2 – 5.1, 4.3 – 5.2, 60.8 – 74.2)

REFRIGERATION SYSTEM SYMPTOMS

HA-83

< SYMPTOM DIAGNOSIS >

[MR16DDT ]

SYMPTOM DIAGNOSIS

REFRIGERATION SYSTEM SYMPTOMS

Trouble Diagnosis For Unusual Pressure

INFOID:0000000006485650

Diagnose using a manifold gauge whenever system’s high and/or low side pressure(s) is/are unusual. The
marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Refer to
above table (Ambient air temperature-to-operating pressure table) since the standard (usual) pressure, how-
ever, differs from vehicle to vehicle.

Symptom Table

INFOID:0000000006485651

Gauge indication

Refrigerant cycle

Probable cause

Corrective action

Both high- and low-pressure sides
are too high.

The pressure returns to nor-
mal soon after sprinkling wa-
ter on condenser.

Overfilled refrigerant.

Collect all refrigerant, evacuate
refrigerant cycle again, and
then refill it with the specified
amount of refrigerant.

Air flow to condenser is insuf-
ficient.

Insufficient condenser cooling
performance.
• Poor fan rotation of radiator

and condenser.

• Improper installation of air

guide.

• Clogged or dirty condenser

fins.

• Repair or replace malfunc-

tioning parts.

• Clean and repair condenser

fins.

When compressor is stopped,
a high-pressure reading
quickly drops by approximate-

ly 196 kPa (2 kg/cm

, 28 psi).

It then gradually decreases.

Air mixed in refrigerant cycle.

Collect all refrigerant, evacuate
refrigerant cycle again, and
then refill it with the specified
amount of refrigerant.

• Low-pressure pipe is cooler

than the outlet of evapora-
tor.

• Low-pressure pipe is frost-

ed.

Expansion valve opened too
much (excessive flow of refrig-
erant).

Replace expansion valve.

High-pressure side is excessively
high and low-pressure side is too
low.

High-pressure pipe and upper
side of condenser become
hot, however, liquid tank does
not become so hot.

Clogged or crushed high-pres-
sure pipe located between
compressor and condenser.

Repair or replace the malfunc-
tioning parts.

High-pressure side is too low and
low-pressure side is too high.

• The readings of both sides

become equal soon after
compressor operation
stops.

• There is no temperature dif-

ference between high- and
low-pressure sides.

Malfunction in compressor sys-
tem (insufficient compressor
pressure operation).
• Damage or breakage of

valve.

• Malfunctioning gaskets.

Replace compressor.

AC359A

AC360A

AC356A

HA-84

< SYMPTOM DIAGNOSIS >

[MR16DDT ]

REFRIGERATION SYSTEM SYMPTOMS

Both high- and low-pressure sides
are too low.

• The area around evapora-

tor outlet does not become
cold.

• The area around evapora-

tor inlet becomes frosted.

Clogged expansion valve.
• Breakage of temperature

sensor.

• Clogging by foreign material.

Eliminate foreign material from
expansion valve, or replace it.

• There is a temperature dif-

ference between the areas
around outlet and inlet
pipes of liquid tank.

• Liquid tank becomes frost-

ed.

Malfunction in inner liquid tank
(clogged strainer).

Replace liquid tank.

Evaporator becomes frosted.

Clogged or crushed low-pres-
sure pipe.

Repair or replace malfunction-
ing parts.

Malfunction in intake sensor
(AUTOMATIC AIR CONDI-
TIONING) or thermo control
amp. (MANUAL AIR CONDI-
TIONING).

• Check intake sensor system.

Refer to

HAC-59, "Diagnosis

Procedure"

(AUTOMATIC

AIR CONDITIONING: 4WD
models).

• Check intake sensor system.

Refer to

HAC-149, "Diagno-

sis Procedure"

(AUTOMATIC

AIR CONDITIONING: 2WD
models).

• Check thermo control amp.

system. Refer to

HAC-224,

"Diagnosis Procedure"

(MANUAL AIR CONDITION-
ING: 4WD models).

• Check thermo control amp.

system. Refer to

HAC-285,

"Diagnosis Procedure"

(MANUAL AIR CONDITION-
ING: 2WD models).

There is a small temperature
difference between the high
and low pressure pipes for re-
frigerant cycle.

• Shortage of refrigerant.
• Leakage of refrigerant.

• Check for leakage.
• Collect all refrigerant, evacu-

ate refrigerant cycle again,
and then refill it with the spec-
ified amount of refrigerant.

Low-pressure side sometimes be-
comes negative.

• Sometimes the area

around evaporator outlet
does not become cold.

• Sometimes the area

around evaporator inlet is
frosted.

• Icing caused by the mixing of

water in cooler cycle.

• Deteriorated dryer in liquid

tank.

• Collect all refrigerant.
• Evacuate refrigerant cycle

completely, and then refill it
with the specified amount of
refrigerant. At this time, al-
ways replace liquid tank.

Gauge indication

Refrigerant cycle

Probable cause

Corrective action

AC353A

AC354A

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