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.
Fault code | Fail description | |
Control unit | DTC | |
00 | - | Normal |
11 | B1234 | In-car temperature sensor open |
12 | B1233 | In-car temperature sensor short |
13 | B1238 | Ambient temperature sensor open |
14 | B1237 | Ambient temperature sensor short |
15 | B1202 | Water temperature sensor open |
16 | B1203 | Water temperature sensor short |
17 | B1242 | Evaporator temperature sensor open |
18 | B1241 | Evaporator temperature sensor short |
19 | B1245 | Temperature control actuator feed back open (Drive's) |
19 | B1246 | Temperature control actuator feed back short (Drive's) |
20 | B2406 | Temperature control actuator failure |
21 | B1249 | Mode control actuator open |
21 | B1250 | Mode control actuator short |
22 | B2409 | Mode control actuator failure |
23 | B1200 | Humidity sensor open |
24 | B1201 | Humidity sensor short |
25 | B1208 | Intake potentiometer open |
25 | B1209 | Intake potentiometer short |
26 | B2408 | Intake potentiometer failure |
27 | B1257 | AQS sensor open |
28 | B1258 | AQS sensor short |
31 | B1259 | AQS sensor failure |
32 | B1204 | Temperature control actuator open (Passenger's) |
32 | B1205 | Temperature control actuator short (Passenger's) |
33 | B2415 | Temperature control actuator failure |
Fault code display
Continuance operation
Step operation
STEP operation
If fault codes are displayed during the check, Inspect malfunction causes by referring to fault codes.
Fail safe
NO. | ITEM | FAIL SAFE |
1 | In-car temperature sensor | Control with the valve of 25℃ (77℉) |
2 | Ambient temperature sensor | Control with the valve of 20℃ (67℉) |
3 | Evaporator temperature sensor | Control with the valve of -2℃ (28.4℉) |
4 | Temperature sensor | Control with the valve of -2℃ (28.4℉) |
5 | Temperature control actuator | If temperature setting 17℃ - 24.5℃. Fix at maximum cooling position. If temperature setting 25℃ - 32℃. Fix at maximum heating position. |
6 | Mode control actuator | Fix vent position, while selecting vent mode. Fix defrost position, while selecting all except vent mode. |
7 | Intake control actuator | Fix fresh position, while seleting fresh mode. Fix recifculation position, while selecting recirculation mode. |
8 | AQS sensor | Intake position : The position before selecting AQS switch. |
9 | Humidity sensor | Control with the value of 10% |
10 | Photo sensor |
Disconnect the negative (-) battery terminal.
Remove the crash pad center ganish(A).
Remove the crash pad side cover(B).
Losening the screw then, remove the lower panel(A).
Loowen the screw. Remove the center facia pannel (A) and then disconnect the connectors.
Remove the heater ＆ A/C controller (A) after loosening 4 screws.
Installation is the reverse order of removal.
