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

Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual / Heating, Ventilation and Air Conditioning / Controller. 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
In-car sensor open
12
In-car sensor short
13
Ambient sensor open
14
Ambient sensor short
17
Evaporator sensor open
18
Evaporator sensor short
19
Temp door potentiometer open/short- Drive
20
Temp door potentiometer fault- Drive
21
Mode door potentiometer open/short - Driver
22
Mode door potentiometer fault - Driver
23
Auto Defog Sensor Open
24
Auto Defog Sensor Short
25
Intake door potentiometer open
26
Intake door potentiometer short
32
Temp door potentiometer open/short - Passenger
33
Temp door potentiometer fault - Passenger
43
Defog door potentiometer open/short
44
Defog door potentiometer fault
45
APT CAN signal fault
48
Vehicle speed CAN signal fault
49
Engine coolant temp CAN signal fault
50
Cluster Ionizer Fault
51
Duct sensor vent open - Drive
52
Duct sensor vent shot - Drive
53
Duct sensor floor open - Drive
54
Duct sensor floor shot - Drive
55
Mood door potentiometer open/short- Passenger
56
Mood door potentiometer fault- Passenger
60
COMP CAN signal fault
61
COMP operation state ERROR receive
62
Low_Voltage
63
High_Voltage
64
Cold protection
65
Overheat protection
67
Overcurrent protection
68
Abnormal current sensor
69
Restart failure
70
Overload
71
A/C operating permission is not received
72
A/C allowable power is not received
73
A/C allowable power is the inoperative range of E-COMP
74
APT high pressure
75
APT low pressure
76
Ordering A/C operation to stop (from EMS)
77
Air-Bag Deployment (Ordering E-COMP operation to stop)
78
 E-COMP Interlock Circuit OPEN
85
Blower Motor fault
86
Blower Motor 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
Temperature control actuator
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.
5
Mode control actuator
Open or Short
Fix vent position, while selecting vent mode.
Fix recirculation position, while selecting recirculation mode.
6
Intake control actuator
Open or Short
Fix fresh position, while selecting fresh mode.
Fix recirculation position, while selecting recirculation mode.
7
Vehicle speed
NO reception
A/C OFF (Control with the value of 0 km/h)
8
Engine coolant temperature
NO reception
Control with the value of - 2 °C(28.4°F)
9
APT
NO reception
COMP operation stop (RPM=0)
10
COMP Inverter
Inverter WAIT/SLEEP Mode entry
COMP operation stop (RPM=0)
11
A/Con operating permission
FFh or NO reception
COMP operation stop (RPM=0)
12
A/C Compressor permission power
FFh or NO reception
COMP operation stop (RPM=0)
13
CF_Hcu_PTOperMod
FFh or NO reception
EV Mode substitute control
14
Defogging door potention meter
Open or Short
In the VENT, Bi-Level mode, DEF Door Potention Meter is fixed in CLOSE position.
In the mode other VENT, Bi-Level mode, DEF Door Potention Meter is fixed in OPEN position.
15
Passenger mode doorpotention meter
Open or Short
In the VENT mode, PS Mode Door Potention Meter is fixed in VENT position.
In the mode other than VENT, PS Mode Door Potention Meter is fixed in DEF position.
16
Duct sensor_Vent [LH]
Open or Short
In case of the Duct sensor failure, replace the Duct sensor with Temp Door mapping.
17
Duct sensor_Floor [LH]
Open or Short
In case of the Duct sensor failure, replace the Duct sensor with Temp Door mapping.

Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the crash pad center garnish.
(Refer to Body - "Crash Pad Garnish")
3.
Loosen the mounting screws and remove the A/C & heater controller unit (A).

4.
Press the lock pin and separate the A/C & heater controller unit connectors (A).

5.
To install, reverse the removal procedure.
   
•
Make sure the connector are connected in properly.
•
Replace any damaged clips. 7

    ComponentsConnector Pin Function[Connector A] Pin NO Funtion Pin NO Funtion 1Battery (+)21IGN12-22IGN23ILL+ (TAIL)23Blower PWM4Sensor REF (+5V)24Left Photo Sensor (-)5Driver Mode Control Actuator Feedback25Right Photo Sensor (-)6Driver Temperature Control Actuator Feedback26Blower Relay7Intake Actuator Feedback27Incar sensor (+)8Evaporator Temperature Sensor (+)28Incar motor (-)9Ambient Temperature Sensor (+)29-10Dirver Mode Control Actuator (VENT)30Detent out (-)11Dirver Mode Control Actuator (DEF)31-12Driver Temperature Control Actuator (COOL)32-13Driver Temperature Control Actuator (WARM)33P CAN HIGH14Intake Actuator (FRE)34P CAN LOW15Intake Actuator (REC)35Climate_CAN High16Passenger Temperature Control Actuator (COOL)36Climate_CAN Low17Passenger Temperature Control Actuator (WARM)37Interlock (+)_Ecomp18HTD (Rear Defrost)38Interlock (-)_Ecomp19Reae defogging switch39Sensor Ground20ILL - (RHEO)40Ground[Connector B] Pin NO Funtion Pin NO Funtion 1PTC Relay 117PAB Off Signal2PTC Relay 218Passenger Mode Control Actuator (Vent)3-19Passenger Mode Control Actuator (Defrost)4-20Passenger Mode Control Actuator Feedback5Auto Defogging Actuator (OPEN)21Duct Sensor (+)_Vent6Auto Defogging Actuator (CLOSE)22Duct Sensor (+)_Floor7-23-8-24-9-25Passenger Temperature Control Actuator Feedback10-26-11PAB IGN 127-12ADS Signal28Auto Defogging Actuator Feedback13-29-14-30-15PAB On Signal31-16Ground32-

    Other information:

    Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: Blower Unit. Repair procedures

    Replacement    When prying with a flat-tip screwdriver or use a prying trim tool, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage.1.Disconnect the negative (-) battery terminal.2.Recover the refrigerant with a recovery / recycling / charging station.

    Hyundai Ioniq (AE) 2017-2022 Service & Repair Manual: Components and components location

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