Hyundai Tiburon (2003 year). Manual — part 132

FAIL SAFE FUNCTION

00

Normal

-

11

Open INCAR Sensor circuit

• Incar sensor

• Harness or connector between incar sensor and A/C

control assembly

• A/C control assembly

12

Shorted INCAR Sensor circuit

13

Open Ambient sensor circuit

• Ambient sensor

• Harness or connector between ambient sensor and A/C

control assembly

• A/C control assembly

14

Shorted Ambient sensor circuit

15

Open water temp. sensor

• Water temp. sensor

• Harness or connector between water temp. sensor and

A/C control assembly

• A/C control assembly

16

Shorted water temp. sensor

17

Open thermistor

• Pin thermistor

• Harness or connector between evap. sensor and A/C

control assembly

• A/C control assembly

18

Shorted thermistor

19

Open or shorted temp. door potentiometer

• Harness or connector between temp. door potentiometer

and A/C control assembly

20

Defective temp. door potentiometer

• Temp. door potentiometer

21

Open or shorted mode door potentiometer

• Harness or connector between mode door potentiometer

and A/C control assembly

22

Defective mode door potentiometer

• Mode door potentiometer

No.

Item

Failure

FAIL SAFE Function

1

IN-CAR temperature sensor

Open/Short

25°C alternate value control

2

Ambient temperature sensor

Open/Short

20°C alternate valu e control

3

Thermistor sensor

Open/Short

-2°C alternate value contr ol

4

Water temperature sensor

Open/Short

-20°C alternate valu e control

5

Temperature door potentiometer

Open/Short setup
temperature

For 17°C to 24.5°C, set to maximum cooling
position.
For 25°C to 32°C, set to maximum heating
position.

6

Mode door potentimeter

Open/Short setup
mode

Vent mode, at vent mode
Def mode, at except vent mode

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

TIBURON(GK) > 2003 > G 2.7 V6 DOHC > Heating,Ventilation, Air Conditioning > General Information >
Troubleshooting, TIBURON(GK) > 2003 > G 2.7 V6 DOHC > Heating,Ventilation, Air Conditioning >
General Information > Troubleshooting

TROUBLESHOOTING

PROBLEM SYMPTOMS TABLE

Symptom

Suspect Area

Remedy

No blower operation

1. HTR Fuse

2. Blower relay

3. Blower motor

4. Blower resistor

5. Blower speed control switch

6. Wire harness

Replace
Replace
Replace
Replace
Replace
Replace

No air temperature control

1. Engine coolant capacity

2. Heater control assembly

Add coolant

Replace

No compressor operation

1. Refrigerant capacity

2. A/C Fuse

3. Magnetic clutch

4. Compressor

5. Triple pressure switch

6. A/C switch

7. Thermistor

8. Wire harness

Add refrigerant

Replace
Replace
Replace
Replace
Replace
Replace
Replace

No cool comes out

1. Refrigerant capacity

2. Refrigerant pressure

3. Drive belt

4. Magnetic clutch

5. Compressor

6. Triple pressure switch

7. Thermistor

8. A/C switch

9. Heater control assembly

10. Wire harness

Add refrigerant

Apply a vacuum and add

refrigerant

Adjust

Replace
Replace
Replace
Replace
Replace
Replace
Replace

Insufficient cooling

1. Refrigerant capacity

2. Drive belt

3. Magnetic clutch

4. Compressor

5. Condenser

6. Expansion valve

7. Evaporator

8. Refrigerant lines

9. Triple pressure switch

10. Heater control assembly

Add refrigerant

Adjust

Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace

No engine idle-up when A/C switch
ON

1. Engine (and ECT) ECU

2. Wire harness

-

Replace

No air inlet control

Heater control assembly, cable, door

Replace

No mode control

Heater control assembly, cable, door

Replace

No condenser fan operation

1. ECU-IG Fuse

2. Fan motor

3. Engine (and ECT) ECU

4. Wire harness

Replace
Replace

-

Replace

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

TIBURON(GK) > 2003 > G 2.7 V6 DOHC > Heating,Ventilation, Air Conditioning > General Information > Repair
procedures, TIBURON(GK) > 2003 > G 2.7 V6 DOHC > Heating,Ventilation, Air Conditioning > General Information >
Repair procedures

ON-VEHICLE INSPECTION

TEST CONDITIONS

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

• Engine running at 1,500rpm

• Blower speed control knob on "4" position

• Temperature control knob on "COOL" position

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 (21.8~36.3 psi, 1.5~2.5 kgf/cm²)
High pressure side :
1.37~1.57 MPa (199~228 psi, 14~16 kgf/cm²)

2. Moisture present in refrigeration system.

Symptom seen in

refrigeration system

Probable cause

Diagnosis

Remedy

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 in oversaturected

state

• Moisture in refrigeration

system freezes at
expansion valve orifice
and block circulation of
refrigerant

- Raplace drier

- Remove moisture in

cycle through repeatedly
evacuating air

- Charge proper amount of

new refrigerant

3. Insufficient cooling