TIBURON(GK) >2008 > G 2.7 DOHC > Heating,Ventilation, Air Conditioning > Controller > Manual Controller>Repair procedures  
SELF-DIAGNOSIS
Self-diagnosis process
The F.A.T.C. module self test feature will detect electrical malfunction and provide error codes for system components with suspected failures.

DTC data can be retrieved from the control panel directly or from the DLC using the Hi-Scan Pro.
HOW TO READ SELF-DIAGNOSTIC CODE
1.
After the display panel flickers three times every 0.5 second, the corresponding fault code flickers on the setup temperature display panel every 0.5 second and will show two figures.
2.
Fault code
Fault code
Fail description
Control unit
00
Normal
11
In-car temperature sensor open (High)
12
In-car temperature sensor short (Low)
13
Ambient temperature sensor open (High)
14
Ambient temperature sensor short (Low)
15
Water temperature sensor open (High)
16
Water temperature sensor short (Low)
17
Evaporator temperature sensor open (High)
18
Evaporator temperature sensor short (Low)
19
Temp door potentiometer open/short
20
Temp door motor
21
Mode door potentiometer open/short
22
Mode door control motor
23
Humidity sensor open (High)
24
Humidity sensor short (Low)

3.
Fault code display
(1)
Continuance operation : DTC code is one

(2)
Continance operation : DTC code is more two

(3)
Step operation
A.
Nomal or one fault code is same as a continuance operation
B.
DTC code is more two.

4.
If a fault code is displayed during the DTC check, Inspect a malfunction cause by referring to the DTC code.
5.
Fail safe
(1)
In-car temperature sensor: Control with the value of 25°C(77°F)
(2)
Ambient temperature sensor: Control with the value of 20°C(67°F)
(3)
Evaporator temperature sensor: Control with the value of -2°C(28.4°F)
(4)
Humidity sensor: Control with the value of 10%
(5)
Water temperature sensor : Control with the value of -2°C (28.4°F)
(6)
Temperature control actuator (Air mix potentiometer):
If temperature setting 17°C-24.5°C, fix at maximum cooling position.
If temperature setting 25°C-32°C, fix at maximum heating position.
(7)
Mode control actuator (Direction potentiometer):
Fix vent position, while selecting vent mode.
Fix defrost position, while selecting all except vent mode.
(8)
AQS sensor : AQS operation OFF.
A.
Intake position : The position before selecting AQS switch.
REPLACEMENT
1.
Disconnect the negative (-) battery terminal.
2.
Remove the center facia panel (A) by pulling it using a screw driver (-) after loosening a screw Take care of fixing clips.

3.
Disconnect the connectors (B) from the center facia.

4.
Remove the heater & A/C controller (A) after loosening 4 screws.

5.
Installation is the reverse order of removal.