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Self-diagnosis process
Self-diagnosis process
How to read self-diagnostic code
During the self-diagnosis, the corresponding fault code flickers on the setup temperature display panel every 0.5 second and will show two figures. Fault codes are displayed in numerical format
Display | Fail description |
0 | Normal |
11 | In-car sensor open |
12 | In-car sensor short |
13 | Ambient temperature sensor open |
14 | Ambient temperature sensor short |
17 | Evaporator temperature sensor open |
18 | Evaporator temperature sensor short |
19 | Temperature door potentiometer open/short (Driver) |
20 | Temperature door potentiometer fault (Driver) |
21 | Mode door potentiometer open/short |
22 | Mode door potentiometer fault |
25 | Intake door potentiometer open/short |
26 | Intake door potentiometer fault |
32 | Temperature door potentiometer open/short (Passenger) |
33 | Temperature door potentiometer fault (Passenger) |
43 | Defog door potentiometer open/short |
44 | Defog door potentiometer fault |
45 | APT (A/C Pressure Transducer) CAN signal fault |
47 | RPM CAN signal fault |
48 | Vehicle speed CAN signal fault |
49 | Engine coolant temperature CAN signal fault |
50 | Cluster ionizer fault |
51 | Auto defogging sensor communication and sensor input fault |
Fault code display
Continuance operation: DTC code is none or one.
Continuance operation: DTC code is two or more.
STEP operation
Normal or one fault code is same as a continuance operation.
DTC code is two or more.
If fault codes are displayed during the check, inspect malfunction causes by referring to fault codes.
Fail safe
No | Sensor | Fail condition | Fail safe function |
1 | In-car sensor | < 0.1V or > 4.9V | 23℃ (73.4℉) |
2 | Ambient temperature sensor | < 0.1V or > 4.9V | 20℃ (68℉) |
3 | Evaporator temperature sensor | < 0.1V or > 4.9V | -2℃ (28.4℉) |
4 | Photo sensor | - | No compensation |
5 | Auto defogging sensor (relative humidity) | Communication fail | ● Relative humidity: 60%, ● Surrounding temperature: 23℃ (73.4℉) |
6 | Auto defogging sensor (glass temperature) | < 0.1V or > 4.9V | Glass temperature: 23℃ (73.4℉) |
7 | Temperature control actuator feedback | < 0.1V or > 4.9V | ● Setting temperature is 24.5℃ (76.1℉) or below: Max cool ● Setting temperature is 25.0℃ (77℉) or above: Max hot |
8 | Mode control actuator feedback | < 0.1V or > 4.9V | ● Vent: Vent ● Others: Defog |
9 | Intake actuator feedback | < 0.1V or > 4.9V | ● Recirculation: Recirculation ● Others: Fresh |
10 | Auto defogging actuator feedback | < 0.1V or > 4.0V | ● Close: Close ● Others: Open |
