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
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. Codes are displayed in numerical format.
Display | Fail description |
00 | Normal |
11 | In-car sensor open |
12 | In-car sensor short |
13 | Ambient sensor open |
14 | Ambient sensor short |
15 | Water temp sensor open |
16 | Water temp sensor short |
17 | Evaporator sensor open |
18 | Evaporator sensor short |
19 | Temp door potentiometer open/short- Drive |
20 | Temp door potentiometer fault- Drive |
21 | Mode door potentiometer open/short – Passenger |
22 | Mode door potentiometer fault – Passenger |
25 | Intake door potentiometer open |
26 | Intake door potentiometer short |
32 | Temp door potentiometer open/short - Passenger |
33 | Temp door potentiometer fault - Passenger |
Fault code display
Continuance operation : DTC code is one
Continuance operation : DTC code is more two
Step operation
Nomal or one fault code is same a continuance
DTC code is more two
If fault codes are displayed during the check, Inspect malfunction causes by referring to fault codes.
Fail safe
In-car temperature sensor: Control with the value of 25°C (77°F)
Ambient temperature sensor: Control with the value of 20°C (67°F)
Evaporator temperature sensor: Control with the value of -2°C (28.4°F)
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
Mode control actuator (Direction potentiometer):
Fix vent position, while selecting vent mode.
Fix defrost position, while selecting all except vent mode.
Intake control actuator :
Fix fresh position, while selecting fresh mode.
Fix recirculation position, while selecting recirculation mode.
Disconnect the negative (-) battery terminal.
Remove the center fascia panel (A).
Remove the audio assembly(refer to BD group-crash pad)
Loosen the heater & A/C controller (A) mount screws.
Disconnect the heater ＆ A/C controller connector (A) and then remove the heater ＆ A/C controller(B).
Installation is the reverse order of removal.
