Hyundai Sonata: Heater & A/C Control Unit (DATC) Repair procedures - Controller - Heating, Ventilation and Air ConditioningHyundai Sonata: Heater & A/C Control Unit (DATC) Repair procedures

Self Diagnosis
1.
Self-diagnosis process.

   
When operating the self-diagnostics, the below fault (self-diagnostics code) will blink at 0.5 seconds interval on the temperature display settings (driver's side only) and the remaining symbols are OFF .
2.
Fault code display
(1)
Continuance operation : DTC code.

(2)
Continuance operation : DTC code.

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

3.
If fault codes are displayed during the check, Inspect malfunction causes by referring to fault codes.
Display
Fail description
0
Normal
11
Incar sensor OPEN
12
Incar sensor SHORT
13
Ambient sensor OPEN
14
Ambient sensor SHORT
17
Evaporator sensor OPEN
18
Evaporator sensor SHORT
19
Driver temp door potentionmeter OPEN or SHORT
20
Driver temp door potentionmeter Error
21
Mode door potentionmeter OPEN or SHORT
22
Mode door potentionmeter Error
25
Intake door potentionmeter OPEN or SHORT
26
Intake door potentionmeter Error
32
Passenger temp door potensionmeter OPEN or SHORT
33
Passenger temp door potention meter Error
45
APT CAN Signal Error
47
RPM CAN Signal Error
48
Vehicle speed CAN Signal Error
49
Engine coolant temprature CAN Signal Error
71
ECV Fault

4.
Fail safe
NO
Item
Fault
Fail Safe
1
Incar sensor
Open or Short
Control with the value of 25°C(77.0°F)
2
Amblent sensor
Open or Short
Control with the value of 20°C(67°F)
3
Evaporator sensor
Open or Short
Control with the value of -2°C(28.4°F)
4
Mode door potentiometer
Open or Short
Fix vent position, while selecting vent mode.
Fix defrost position, while selecting all except vent mode.
Fix vent position, while selecting IG ON > OFF.
Fix defrost position, while selecting floor purge.
5
Temperature door potentiometer (MTC)
Open or Short
If temperature setting 1 ~ 7 step, fix at maximum cooling position.
If temperature setting 8 ~ 15 step, fix at maximum heating position.
6
Temperature door potentiometer (DATC)
Open or Short
If temperature setting 17°C(62.6°F) ~ 24.5°C(76.1°F), fix at maximum cooling position.
If temperature setting 25°C(77°F) ~ 32°C(89.6°F), fix at maximum heating position.
7
Intake door potentiometer
Open or Short
Fix vent position, while selecting vent mode.
Fix defrost position, while selecting all except vent mode.
8
Engine RPM
FFh or NO reception
A/C OFF (Control with the value of 0 RPM)
9
Vehicle speed
FFh or NO reception
A/C OFF (Control with the value of 0 km/h)
10
Engine coolant temperature
FFh or NO reception
Control with the value of - 2 °C(28.4°F)
11
APS
FFh or NO reception
Control with the value of 5%
12
R-TQACNAPVC
(Max Torque limitation of A/C Compressor)
FFh or NO reception
A/C OFF (Control with the value of 0 Nm)
13
R-PACNC
(APT Sensor Output Value)
FFh or NO reception
A/C OFF (Control with the value of 0 Nm)
14
RLY-AC
(Activation of air conditioner compressor relay)
FFh or NO reception
A/C OFF

Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Using a screwdriver or remover, remove the center fascia panel (A).

3.
Disconnect the A/C & heater controller connectors (A).

4.
Remove the heater and A/C controller (A) from the center facia panel.

5.
Install in the reverse order of removal.
   
Make sure the connector are connected in properly.
Replace any damaged clips.
    Heater & A/C Control Unit (DATC) Components and Components Location
    Components Connector [A] Pin NOFunctionPin NOFunction1ILL+ (TAIL)21Detent OUT (+)2Sensor REF (+5V)22HTD (Rear defog indicator)3Mode control actuator (Vent)23Rear defog switch4Mode control actuator ...

    See also:

    Exhaust Manifold Repair procedures
    Removal and Installation 1. Remove the engine cover. 2. Disconnect the battery negative terminal. 3. Remove the air cleaner assembly. (Intake And Exhaust System - "Air Cleaner") 4. Re ...

    Components and Components Location
    Components Rear sear back assembly 1. Rear seat back cover2. Rear seat back pad3. Rear seat headrest guide4. Rear seat headrest5. Rear seat back webbing guide6. Rear back armrest 7. Rear seat ba ...

    AVN Remote Controller Components and Components Location
    Components 1. Left Remote Control Switch (Audio + Hands free)2. Right Remote Control Switch(Cruise+Trip Computer) ...