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:
Applying the parking brake
Always set the parking brake before
leaving the vehicle, to apply:
Firmly depress the brake pedal.
Pull up the parking brake lever as far as
possible.
WARNING
To reduce the risk of SERIOUS INJURY
or DEATH, do not operate the parking
brake while the vehicle is moving
except in an emergency situation. It
could damage the brake system and
lead to an accident.
Releas..
Function malfunction
When Safe Exit Warning is not working
properly, the ‘Check Blind-Spot Safety
system’ warning message will appear
on the cluster, and the system will turn
off automatically or the system will be
limited. We recommend that the system
be inspected by an authorized HYUNDAI
dealer.
Function disabled
When the rear bumper around the rear
corner radar or sensor is covere..