Hyundai Elantra: Controller / Heater & A/C Control Unit (Manual) Components and Components Location
| Components |
| Connector | Pin NO | Function | Connector | Pin NO | Function |
| A | 1 | Low | B | 18 | ILL- (RHEO) |
| 2 | Common | 19 | Sensor ground | ||
| 3 | Ground | 20 | Ground | ||
| 4 | Middle Low | 21 | Battery (+) | ||
| 5 | Middle High | 22 | ISG DC | ||
| 6 | High | 23 | ISG B+ | ||
| B | 1 | IGN2 | 24 | ILL+ (TAIL) | |
| 2 | PAB IGN1 | 25 | Sensor REF (+5V) | ||
| 3 | HTD (Rear defog indicator) | 26 | EVAP sensor (+) | ||
| 4 | Detent Out (-) | 27 | AMB sensor (+) | ||
| 5 | PTC Relay 2 | 28 | Mode control actuator (Feedback) | ||
| 6 | PTC Relay 3 | 29 | Temperature control actuator (Feedback) | ||
| 7 | PTC on signal | 30 | Intake actuator (Feedback) | ||
| 8 | PAB Off signal | 31 | Mode control actuator (Vent) | ||
| 9 | SBR | 32 | Mode control actuator (Def) | ||
| 10 | Rear SBR [LH] | 33 | Temperature control actuator (Cool) | ||
| 11 | Rear SBR [Center] | 34 | Temperature control actuator (Warm) | ||
| 12 | Rear SBR [RH] | 35 | Intake actuator (Fresh) | ||
| 13 | ECV+ | 36 | Intake actuator (Recirculation) | ||
| 14 | ECV- (Ground) | 37 | C_CAN High | ||
| 15 | Max blower on signal | 38 | C_CAN Low | ||
| 16 | Rear defogging swich (On) | 39 | Blower common signal | ||
| 17 | Hazard signal | 40 | Ground |
Controller
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Heater & A/C Control Unit (Manual) Repair procedures
Replacement
1.
Disconnect the negative (-) battery terminal.
2.
Remove the glove box upper cover assembly.
(Refer to Body - "Glove Box Upper Cover Assembly")
3.
Loosen the mounting screw ...
Other information:
Hyundai Elantra AD (2016-2020) Service Manual: Photo Sensor Description and Operation
Description
The photo sensor is located at the center of the defrost nozzles.
The photo sensor contains a photovoltaic (sensitive to
sunlight) diode. The solar radiation received by its light receiving
portion, generates an electromotive force in proportion to the amount of
radiation rece ...
Hyundai Elantra AD (2016-2020) Owners Manual: Main components of the Occupant Classification System
A detection device located within the front passenger seat cushion.
Electronic system to determine whether the passenger air bag systems should
be activated or deactivated.
An indicator light located on the instrument panel which illuminates the
words "PASSENGER AIR BAG OFF" i ...