Hyundai Tiburon (2003 year). Manual — part 156

In turning on IG and selecting outdoor mode with indoor switch, 12V is outputted from FATC connector A-23 terminal, 0V is
supplied for A-10 terminaland motor works in direction of outdoor. In selecting indoor mode with indoorswitch, 12V is
outputted from FATC connector A-10 terminal, 0V is supplied for A-23 terminal and motor works in direction of indoor.
ERROR DIAGNOSTICS

INTAKE AND AQS CHECK

Symptoms

Causes

How to check

Outdoor mode running error

Power supply error in actuator

Separate connector linked with actuator,
select outdoor mode with indoor switch
and measure voltage of FATC
connector A-23 terminal. If 8V and
more, check actuator or wiring state and
if 9V and less, check the inside of
controller.

Indoor mode running error

Power supply error in actuator

Select indoor mode in the above method
and measure voltage of FATC
connector A-10 terminal. If 8V and
more, check actuator or wiring state and
if 9V andless, check the inside of
controller

Fixed in outdoor or indoor mode at
AQS selection

AQS signal terminal output error

Select AQS switch and measure AQS
signal terminal as shown in the above
figure. If there is no change of voltage
over 10 min, check AQS.

In turning on IG and selecting mode switch, sequential operation begins in order of Vent

→

Bi-level

→

Blower

→

Mix. DIP

mode works regardless of order at selecting it. In selecting Vent mode as mode switch, GND(0V) is supplied for FATC
connector A-14(Vent) terminal. Voltage of 9V and more is set in the rest terminal A-15(DEF) and motor drive IG in mode
actuator which receives the signal, works in direction of vent mode setup. Vent, Built-in-level, Blower, Mix and Defrost
mode can be selected in themethod described above.
ERROR DIAGNOSTICS

MODE CHECK

Symptoms

Causes

How to check

Specific mode isn't selected.

Signal transmission error of selected
mode

Measure voltage of selected mode wiring
without separating connector linked with
actuator. If 8V and more, check the inside of
controller.

Mode actuator running error

If 1V and less at measuring in the above
method, check mode actuator and wiring
state.

Mode selection is impossible

Internal error of mode actuator

If motor driver IG built in mode actuator is
bad, mode selection is impossible. When
mode isn't selected though GND(0V) is
supplied for selected mode wiring after
selecting mode in controller, its cause is
internal failureof mode actuator.

In adjusting temp switch from 32°C to 17°C, 11V is outputted from FATC connector A-9 terminal, 0V is supplied for A-22
terminal and temp motor works in direction of COOL. In adjusting temp switch from 17°C to 32°C, 11V is outputted from
FATC connector A-22 terminal, 0V is supplied for A-9 terminal and temp motor works in direction of WARM. When temp
actuator has to move to a certain location for its automatic control, temp feedback signal terminal moves equally in temp
actuator and informs controller of location of temp actuator through FATC connector B-10 terminal. Comparing original
value with inputted value, it works until they are same. If 4.9V and more is inputted in B-10 terminal, it is regarded as
disconnection. If 0.1V and less is inputted in B-10 terminal, it is regarded as short-circuit. In the case of disconnection or
short-circuit as a result of self-diagnostic, substitute control is carried out as follows.

ERROR DIAGNOSTICS

TEMP CHECK

• If setup temperature is 17°C to 24.5°C, set to MAX COOL.

• If setup temperature is 25°C to 32.0°C, set to MAX WARM.

Symptoms

Causes

How to check

Temp actuator running error

Power supply error in temp actuator

After altering 17°C to 32°C and advers ely,
measure voltage ofA-22 terminal. If Both of
them are 9V and more, check temp actuator
and peripheral wiring state and if one or
both of them are 5V and less, its cause is
internal failure of FATC.

Sensor (+5) power supply error

If automatic control isn't operated smoothly,
measure voltage of FATC connector B- 8
terminal. If under 4.8V or over 5.2V, its
cause is internal failure of FATC.

Driver error of temp actuator

If No. 20 is outputted as a result of self-
diagnostic, check temp actuatordriver.