Kia Forte: Heater & A/C Control Unit (DATC) Self Diagnosis - Controller - Heating,Ventilation, Air Conditioning - Kia Forte TD 2014-2018 Service ManualKia Forte: Heater & A/C Control Unit (DATC) Self Diagnosis

Second generation YD (2014-2018) / Kia Forte TD 2014-2018 Service Manual / Heating,Ventilation, Air Conditioning / Controller / Heater & A/C Control Unit (DATC) Self Diagnosis

1.
Self-diagnosis process

2.
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
Fault code
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

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

(2)
Continuance operation : Two or more DTC code

(3)
STEP operation
A.
Normal or one fault code is same as a continuance operation.
B.
Two or more DTC code.

4.
If fault codes are displayed when checking, inspect for malfunction causes by referring to fault codes.
5.
Fail safe
No
Sensor
Fail condition
Fail safe function
1
In-car sensor
< 0.1V or > 4.9V
25°C (77°F)
2
Ambient temperature sensor
< 0.1V or > 4.9V
20°C (68°F)
3
Evaporator temperature sensor
< 0.1V or > 4.9V
 -2°C (28.4°F)
4
Auto defogging sensor (relative humidity)
< 0.1V or > 4.9V
Relative humidity : 0%
5
Temperature control actuator feedback - Driver
< 0.1V or > 4.9V
Setting temperature is 24.5°C (76°F) or below: Max cool
Setting temperature is 25.0°C (77°F) 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 : 0%
Torgue : 0

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