Hyundai Elantra: Controller / Heater & A/C Control Unit (Manual)
Components and components location
[This illustration shows the LHD type. RHD type is symmetrical.] |

[Connector A]
Pin No
|
Function
|
Pin No
|
Function
|
1
| Low (Register specifications)
| 4
| Middle Low (Register specifications)
|
2
| Common (Register specifications)
| 5
| Middle High (Register specifications)
|
3
| Ground (Register specifications)
| 6
| High (Register specifications)
|
[Connector B]
Pin No
|
Function
|
Pin No
|
Function
|
1
| Battery (+)
| 21
| IGN2
|
2
| ISG B+
| 22
| IGN1
|
3
| ILL+ (TAIL)
| 23
| Blower IS (PWM specifications)
|
4
| Sensor REF (+5V)
| 24
| -
|
5
| Mode control actuator (Feedback)
| 25
| -
|
6
| Temperature control actuator (Feedback)
| 26
| -
|
7
| Intake actuator (Feedback)
| 27
| Blower Max. On signal (Register specifications)
|
8
| EVAP sensor (+)
| 28
| -
|
9
| AMB sensor (+)
| 29
| PTC relay
|
10
| Mode control actuator (Vent)
| 30
| -
|
11
| Mode control actuator (DEF)
| 31
| -
|
12
| Temperature control actuator (Cool)
| 32
| -
|
13
| Temperature control actuator (Warm)
| 33
| P_CAN High
|
14
| Intake actuator (FRE)
| 34
| P_CAN Low
|
15
| Intake actuator (REC)
| 35
| Blower INH (PWM specifications)
|
16
| HDT
| 36
| Blower PWM (In) (PWM specifications)
|
17
| -
| 37
| ECV (+)
|
18
| -
| 38
| ECV (-)
|
19
| Blower signal (On) (Register specifications)
| 39
| Sensor ground
|
20
| ILL- (RHEO)
| 40
| Ground
|
Repair procedures
1. | Disconnect the negative (-) battery terminal. |
2. | Remove the crash pad lower panel. (Refer to Body (Interior and Exterior) - "Crash Pad Lower Panel") |
3. | Remove the steering column shroud upper panel (A). 
|
4. | Remove the gear knob & boots (A) pull both of it up. 
|
5. | Using a screwdriver or remover, remove the floor console side garnish (A). 
|
6. | Remove the parking brake cover (A). 
|
7. | Using a screwdriver or remover, remove the console upper cover (A). 
|
8. | Using a screwdriver or remover, remove the crash pad garnish [CTR] (A). 
|
9. | After loosening the mounting screws, remove the A/C & heater controller unit (A). 
|
10. | Disconnect the A/C & heater controller connectors (A). 
|
11. | To install, reverse the removal procedure. •
| Make sure the connector are connected in properly. |
•
| Replace any damaged clips (or pin-type retainers). |
|
|
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 Diag..
Other information:
The Hill-Start Assist Control (HAC)
helps prevent the vehicle from rolling
backwards when starting a vehicle from
a stop on a hill. The system operates the
brakes automatically for approximately
2 seconds and releases the brake after 2
seconds or when the accelerator pedal is
depressed.
WARNING
Always be ready to depress the
accelerator pedal when starting off on
a incline. The HAC activa..
Your vehicle is equipped with an
Emergency Trunk Safety Release lever
located inside the trunk. When someone
is inadvertently locked in the trunk, the
trunk can be opened by moving the lever
in the direction of the arrow and pushing
the trunk open.
WARNING
You and your passengers must
be aware of the location of the
Emergency Trunk Safety Release
lever in this vehicle and how to ope..