Hyundai Sonata: Controller / Heater & A/C Control Unit (Manual) Components and Components Location
| Components |
| Pin NO | Function | Pin NO | Function |
| 1 | ILL+ (TAIL) | 21 | Detent OUT (+) |
| 2 | Sensor REF (+5V) | 22 | HTD |
| 3 | Mode control actuator (Vent) | 23 | Rear defog switch |
| 4 | Mode control actuator (Defrost) | 24 | C_CAN High |
| 5 | Mode control actuator (Feedback) | 25 | C_CAN Low |
| 6 | Intake actuator (Fresh) | 26 | ECV+ |
| 7 | Intake actuator (Recirculation) | 27 | ECV- (Ground) |
| 8 | Intake actuator (Feedback) | 28 | AMB Sensor (+) |
| 9 | Driver's temperature control actuator (Cool) | 29 | EVAP Sensor (+) |
| 10 | Driver's temperature control actuator (Warm) | 30 | Blower MAX signal |
| 11 | Driver's temperature control actuator (Feedback) | 31 | Blower ON signal |
| 12 | Driver's seat heat indicator (Low) | 32 | - |
| 13 | Driver's seat heat indicator (Mid) | 33 | - |
| 14 | Driver's seat heat indicator (High) | 34 | - |
| 15 | Passenger's seat heat indicator (Low) | 35 | - |
| 16 | Driver's seat heat switch | 36 | - |
| 17 | Passenger's seat heat switch | 37 | - |
| 18 | Driver's cool switch | 38 | - |
| 19 | Passenger's cool switch | 39 | - |
| 20 | ILL- (RHEO) | 40 | Sensor ground |
| Pin NO | Function | Pin NO | Function |
| 1 | Ground | 9 | Ground |
| 2 | Driver's seat vent indicator (Low) | 10 | - |
| 3 | Driver's seat vent indicator (Mid) | 11 | - |
| 4 | Driver's seat vent indicator (High) | 12 | Passenger's seat heat indicator (Mid) |
| 5 | Passenger's seat vent indicator (Low) | 13 | Passenger's seat heat indicator (High) |
| 6 | Passenger's seat vent indicator (Mid) | 14 | - |
| 7 | Passenger's seat vent indicator (High) | 15 | IGN1 |
| 8 | IGN2 | 16 | Battery (+) |
| Pin NO | Function | Pin NO | Function |
| 1 | Low | 4 | Middle Low |
| 2 | Common | 5 | Middle High |
| 3 | Ground | 6 | High |
Controller
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Heater & A/C Control Unit (Manual) Repair procedures
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Using a screwdriver or remover, remove the center fascia panel (A).
3.
Disconnect the A/C & heater controller connectors ...
Other information:
Hyundai Sonata LF 2014-2019 Owners Manual: Seat Belt Safety Precautions
Always fasten your seat belt and make sure all passengers have fastened their
seat belts before starting any trip. Air bags are designed to supplement the seat
belt as an additional safety device, but they are not a substitute. Most states
require all occupants of a vehicle to wear seat belts.
WA ...
Hyundai Sonata LF 2014-2019 Owners Manual: Air intake control
This button is used to select the outside (fresh) air position or recirculated
air position.
Recirculated air position
With the recirculated air position selected, air from the passenger compartment
will be drawn through the heating system and heated or cooled according to the function
selected ...
