Hyundai Venue (QX): Controller / Heater & A/C Control Unit (DATC). Repair procedures

Hyundai Venue (QX) (2020-2026) Service Manual / Heating, Ventilation and Air Conditioning / Controller / Heater & A/C Control Unit (DATC). Repair procedures

Self Diagnosis
1.
Self-diagnosis process.

Hyundai Venue. Heater & A/C Control Unit (DATC). Repair procedures

Hyundai Venue. Heater & A/C Control Unit (DATC). Repair procedures   
•
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.

Hyundai Venue. Heater & A/C Control Unit (DATC). Repair procedures
(2)
Continuance operation : DTC code.

Hyundai Venue. Heater & A/C Control Unit (DATC). Repair procedures
(3)
STEP operation.
A. Nomal or one fault code is same as a continuance operation.
B. DTC code.

Hyundai Venue. Heater & A/C Control Unit (DATC). Repair procedures
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
31
 Auto defog sensor (OPEN)
Auto defog sensor (SHORT)
32
 Passenger temp door potensionmeter OPEN or SHORT
40
 Auto defogging actuator OPEN or SHORT
41
 Defog door potentiometer Error
44
 Cluster anion generator Error
45
 APT CAN Signal Error
47
 RPM CAN Signal Error
48
 Vehicle speed CAN Signal Error
49
 Engine coolant temprature CAN Signal Error

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.

Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the console upper front garnish.
(Refer to Floor Console - "Floor Console Assembly")
3.
Remove the center fascia panel.
(Refer to Body (Interior and Exterior) - "Center Fascia Panel")
4.
Remove the audio and AVN head unit.
(Refer to Body Electrical System - "Audio Unit")
5.
Loosen the mounting screws and remove the A/C & heater controller unit (A).

Hyundai Venue. Heater & A/C Control Unit (DATC). Repair procedures
6.
Separate the A/C & heater controller unit connector (A) and hose (B).

Hyundai Venue. Heater & A/C Control Unit (DATC). Repair procedures
7.
To install, reverse the removal procedure.
Hyundai Venue. Heater & A/C Control Unit (DATC). Repair procedures   
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Make sure the connector is connected in properly.
•
Replace any damaged clips.

    Components Connector [A] Pin NO Function Pin NO Function 1 Battery (+) 21 IGN2 2 ISG B+ 22 IGN1 3 ILL+ (TAIL) 23 Blower motor (+) 4 Sensor REF (+5V) 24 Photo sensor (-) 5 Mode actuator feedback 25 - 6 Temperature actuator feedback 26 - 7 Intake actuator feedback 27 - 8 EVAP Sensor (+) 28 - 9 AMB Sensor (+) 29 - 10 Mode actuator (Vent) 30 PTC Relay 1 11 Mode actuator (Defrost) 31 - 12 Temperature actuator (Cool) 32 - 13 Temperature actuator (Warm) 33 C_CAN High 14 Intake actuator (Fresh Air) 34 C_CAN Low 15 Intake actuator (Recirculated Air) 35 Power mosfet (Drain feed back) 16 HTD (Rear defog indicator) 36 Power mosfet (Gate) 17 Rear defog switch 37 ECV (+) 18 - 38 ECV (-) 19 - 39 Sensor ground 20 ILL- (RHEO) 40 Ground

    Other information:

    Hyundai Venue (QX) (2020-2026) Service Manual: Ambient Temperature Sensor. Description and operation

    Description The ambient temperature sensor is located at the front of the condenser and detects ambient air temperature. It is a negative type thermistor; resistance will increase with lower temperature, and decrease with higher temperature.

    Hyundai Venue (QX) (2020-2026) Service Manual: Temperature Control Actuator. Description and operation

    Description The temperature control actuator is located at the heater unit. It regulates the temperature by the procedure as follows. The signal from the control unit adjusts the position of the temperature door by operating the temperature switch.

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