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:
DescriptionBurglar Alarm State [B/A State]
B/A State
Description
DISARM1) In "DISARM" state, no vehicle start inhibition. So, when door, hood, or Tailgate is opened, there is no alarm sound and flashing.2) If the battery is disconnected while the state is not "ARM/ARMWAIT/ALARM/REARM", B/A state is set to "DISARM" state. 3)In "DISARM" st..
Components and components location
Component Location [General type]1. Rear seat cushion cover [N Line]1. Rear seat cushion cover
Repair procedures
Replacement
•
When removing with a flat-tip screwdriver or remover, wrap protective tape around the tools to prevent damage to components. •
Put on gloves to prevent hand i..