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Self-diagnosis process
Self-diagnosis process
How to read self-diagnostic code
After the display panel blinks three times every 0.5 second, the corresponding fault code blinks 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 |
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 |
23 | Auto defoggin sensor open |
24 | Auto defoggin sensor short |
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 |
50 | Cluster ionizer 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 |
Fault code display
Continuance operation : One DTC code
Continuance operation : Two or more DTC code
STEP operation
Normal or one fault code is same as a continuance operation.
Two or more DTC code.
If fault codes are displayed when checking, inspect for 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 | Auto defogging sensor (relative humidity) | Communication fail | ● Relative humidity : 60% ● Surrounding temperature : 23℃ (73.4℉) |
5 | Temperature control actuator feedback - Driver | < 0.1V or > 4.9V | ● Setting temperature is 24.5℃ (76.1℉) or below ● Setting temperature is 25.0℃ (77℉) or above: Max hot |
6 | Mode control actuator feedback | < 0.1V or > 4.9V | ● Vent : Vent ● Others : Defog |
7 | Intake actuator feedback | < 0.1V or > 4.9V | ● Recirculation : Recirculation ● Others : Fresh |
8 | Auto defogging actuator feedback | < 0.1V or > 4.9V | ● Close : Close ● Others : Open |
9 | ECV feedback | No input of ECV feedback signal | ● ECV fault signal : 1 ● PWM control output : Maintain ● Torgue : 0 |
