Hyundai Elantra: Controller / Heater Control Unit
Components and components location


[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
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. |
|
|
Other information:
Components and components location
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Repair procedures
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Components and components location
Components1. Air cleaner cover2. Air cleaner element3. Air cleaner body & air duct5. Air intake hose
Repair procedures
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