Hyundai Tiburon (2003 year). Manual — part 155

In turning off IGN, battery supplies power for ordinary power, FATC connector A-3 through battery fuse. FATC performs
memory function by means of battery power supplied as described above. In turning on IGN, alternator is driven. At this
time, IG2 power generated in alternator FATC connector A-12 and A-25 terminal through IG1 fuse and air conditioner fuse
(10A). FAT carried out actual system operation by means of IG2 power supplied as described above.
ERROR DIAGNOSTICS

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

CONTROL PANEL TESTS

1. Power supply check

2. Back light and Rear glass heat rays check

3. Blower check

4. Air conditioner check

5. Intake check and AQS check

6. Mode check

7. Temp check

POWER SUPPLY CHECK

Symptoms

Causes

How to check

When IG is ON, memory function
error occurs

Battery power supply error

Check voltage of battery after turning off IG. If
10V and more, check FATC connector and if no
problem, check the inside of controller. If 10V
and less, check fuse or wiring state of battery
power source.

When IG is ON, system running
error occurs

IG2 power supply error

Check voltage of IG2 after turning on IG. If 10V
and more, check FATC connector and if no
problem, check the inside of controller. If 10V
and less, check fuse or wiring state of IG2
power source.

In turning on IG and then light switch, battery power is supplied for FATC connector A-2 terminal through wiring. The
supplied power passes connector A-1 terminal through light bulb in FATC and flows into reostart as shown in the above
figure. The brightness is adjusted according to resistance value of reostart.
ERROR DIAGNOSTICS

BACK LIGHT AND REAR GLASS HEAT RAYS CHECK

Symptoms

Causes

How to check

When light switch is ON, partial error
occurs in back light

Light bulb lighting error in FATC

When light switch is ON, entire error
occurs in back light

Light power supply error

Measure voltage of tail light shown in
the above figure after switching on light.
If 10V and more, check FATC connector
and if no problem, measure signal
voltage of reostart shown in the above
figure. If 8V and more, check reostart
wiring and reostart.

If tail light is below 1V, check tail light
wiring.

Perform the blower check in manual blower running state because it is difficult to check blower at automatic control. Blower
is controlled from level l to level 7 equally as in button operation and running logic. In turning on IG, blower relay is ON and
voltage of 0.1 to 1.4V is transferred from FATC connector A-4 terminal to base source of power TR according to FATC
control (selectable from level 1 to level 7). At this time, voltage of blower motor's both ends is determined according to
collector voltage of FATC connector A-5 terminal. If FATC is controlled in level 7, GND(0V) is supplied for FATC
connectorA-18 terminal and high blower relay is driven.
ERROR DIAGNOSTICS

BLOWER CHECK

Symptoms

Causes

How to check

Amount of wind is wrong at manual
selection of blower

Power TR error

Check voltage of blower motor's both ends.
(Level 1: 3.8V, Level 2: 5.2V, Level 3: 6.5V,
Level 4: 7.9V, Level 5: 9.2V, Level 6: 10.6V,
Level 7: 13.5V [high-relay operation])
Measure voltage of each terminal and if there is
difference more than ±0.6V, check power TR.

Blower wind is discharged despite
pressing OFF switch

Power TR error

Power TR change

11V is outputted from connector A-17 terminal in turning on INSULATING and pressing air conditioner switch. However,
although 11V is outputted from FATC connector A-17 terminal, compressor clutch isn't driven. Wind of air conditioner is
discharged if only compressor clutch works. Output signal from air conditioner is inputted in engine computer through triple
switch. Then, the engine computer considers several conditions and when output of air conditioneris judged to be practical,
it gives GND to signal terminal of air conditioner relay. Accordingly, relay of air conditioner is ON and compressor clutch
works. Triple switch checks pressure of refrigerant flowing through pipe and turnson/off switches in it according to
standard. So, it controls that output signalof air conditioner outputted from FATC is inputted into engine computer, and also
speed of condenser fan according to pressure level. (For high pressure, high-speed and for low pressure, low-speed.
ERROR DIAGNOSTICS

AIR CONDITIONER CHECK

Symptoms

Causes

How to check

Wind of air conditioner isn't
discharged into vehicle despite
switching on air conditioner.

Signal output error of air
conditioner

Switch on air conditioner and measure voltage
of FATC connector A-17 terminal as shown in
the above figure. If 9V and more, check triple
switch,air conditioner relay and ECM.

Switch on air conditioner and measure voltage
of FATC connector A-17 terminal as shown in
the above figure. If 1V and less, check input
value ofevaporator sensor.

Input error of evaporator sensor

If evaporator sensor is disconnected or short or
voltage of its inputsource is more than 3.0V
(below 0.5°C), output of air conditioner isn't
made.