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: Troubleshooting
Trouble Symptom Charts
Trouble Symptom 1
Trouble Symptom 2
Trouble symptomProbable causeRemedyThe set vehicle speed varies greatly upward or downward"Surging" (repeated alternating acceleration and deceleration) occurs after settingMalfunction of the vehicle speed sensor circuitRepair the veh ...
Hyundai Elantra AD (2016-2020) Service Manual: General Safety Information and Caution
Precautions
General Precautions
Please read the following precautions carefully before performing the airbag system service.
Observe the instructions described in this manual, or the airbags could accidentally deploy and cause damage or injuries.
•
Except when performing electrical inspe ...
