Hyundai Elantra (CN7): Controller / Heater Control Unit

Hyundai Elantra (CN7) 2021-2026 Service Manual / Heating, Ventilation and Air Conditioning / Controller / Heater Control Unit

Components and components location

Component Location

1. Heater control unit


Components

[Connector A]
Pin No
Function
Pin No
Function
1
Mode control actuator (Feedback)
21
Mode control actuator (Vent)
2
Intake actuator (Feedback)
22
Mode control actuator (DEF)
3
Passenger's temperature control actuator
23
Intake actuator (FRE)
4
Driver's temperature control actuator
24
Intake actuator (REC)
5
DEF actuator feedback
25
Passenger's temperature control actuator (Cool)
6
Ionizer diagnosis
26
Passenger's temperature control actuator (Warm)
7
-
27
Driver's temperature control actuator (Cool)
8
Photo sensor (-) [LH]
28
Driver's temperature control actuator (Warm)
9
Photo sensor (-) [RH]
29
DEF actuator (Open)
10
-
30
DEF Driver's temperature control actuator (Coles)
11
Auto defoging sensor (SDA)
31
-
12
Auto defoging sensor (SCL)
32
-
13
Auto defoging sensor glass temperature
33
-
14
AMB sensor (+)
34
P_CAN Low
15
EVAP sensor (+)
35
P_CAN High
16
-
36
Clean signal
17
-
37
-
18
-
38
-
19
-
39
-
20
-
40
Ground

[Connector B]
Pin No
Function
Pin No
Function
1
Ground
13
Ground
2
Sensor ground
14
ECV (-) Ground
3
FET (Gate) (Power mosfet specifications)
15
ECV (+)
4
FET (Drain feedback) (Power mosfet specifications)
16
-
5
Blower motor (+) (Power mosfet specifications)
17
-
6
Blower INH (PWM specifications)
18
-
7
Blower IS (PWM specifications)
19
PTC relay (Gasoline PTC specifications)
8
Blower PWM IN (PWM specifications)
20
-
9
Sensor REF (+5V)
21
-
10
-
22
LIN BUS (PM Sensor)
11
-
23
IGN1
12
Battery
24
IGN2

Repair procedures

Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the glove box.
(Refer to Body (Interior and Exterior) - "Glove Box")
3.
Separate the heater control unit connector (A) and then loosen the mounitng screw, remove the heater control unit.

4.
To install, reverse the removal procedure.
   
•
Make sure the connector are connected in properly.

    Components and components location Components[This illustration shows the LHD type. RHD type is symmetrical.][Connector A] Pin No Function Pin No Function 1Battery9IGN22ILL+ (TAIL)10ISG Battery (+)3-11IGN14LIN BUS12HTD5-13-6-14-7-15-8RHEO (ILL-)16Ground Repair procedures Self Diagnosis1.

    Other information:

    Hyundai Elantra (CN7) 2021-2026 Service Manual: Evaporator Temperature Sensor

    Description and operation DescriptionThe evaporator temperature sensor will detect the evaporator core temperature and interrupt compressor relay power in order to prevent evaporator from freezing by excessive cooling. The evaporator temperature sensor has the Negative Temperature Coefficient (NTC).

    Hyundai Elantra (CN7) 2021-2026 Service Manual: Front View Camera Unit

    Schematic diagrams Circuit Diagram Repair procedures Removal1.Disconnect the negative (-) battery terminal.2.Remove the cover (A) & (B).3.Disconnect the front view camera unit connector (A).4.Separate the fixed points (A) of coupler.5.

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