Hyundai Creta: Controller / Heater & A/C Control Unit (DATC)

Hyundai Creta GS 2014-2024 Service Manual / Heating, Ventilation and Air Conditioning / Controller / Heater & A/C Control Unit (DATC)

Components and components location

Components

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

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
23
 Auto defog sensor open
24
 Auto defog sensor short
25
 Intake door potentionmeter OPEN or SHORT
26
 Intake door potentionmeter Error
43
 Defog door potentionmeter open or short
44
 Defog door potentionmeter error
45
 APT CAN Signal Error
47
 RPM CAN Signal Error
48
 Vehicle speed CAN Signal Error
49
 Engine coolant temprature CAN Signal Error
50
 Cluster ionizer fault
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 (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.
6
 Intake door potentiometer
 Open or Short
 Fix FRE position, while selecting FRE mode.
Fix REC position, while selecting REC mode.
7
 Engine RPM
 FFh or NO reception
 Control with the value of 0 RPM
8
 Vehicle speed
 FFh or NO reception
 Control with the value of 0 km/h
9
 Engine coolant temperature
 FFh or NO reception
 Control with the value of - 2 °C(28.4 °F)
10
 APS
 FFh or NO reception
 Control with the value of 0%
11
 R-TQACNAPVC
(Max Torque limitation of A/C Compressor)
 FFh or NO reception
 A/C OFF (Control with the value of 0 Nm)
12
 R-PACNC
(APT Sensor Output Value)
 FFh or NO reception
 A/C OFF (Control with the value of 0 hpa)
13
 RLY-AC
(Activation of air conditioner compressor relay)
 FFh or NO reception
 A/C OFF

Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the crash pad center panel.
(Refer to Crash Pad - "Crach Pad Center Panel")
3.
After loosening the mounting screws, remove the A/C & heater controller unit (A).
4.
Disconnect the connector (A) and the air hose (B).
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 (Manual)
Components and components location Components Connector [A] Pin NO Function Pin NO Function 1 Low ...

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