Hyundai Elantra: Controller / Heater & A/C Control Unit (DATC) Components and Components Location
| Components |
| Connector | Pin NO | Function | Connector | Pin NO | Function |
| A | 1 | Battery (+) | A | 21 | IGN1 |
| 2 | IGN2 | 22 | ILL+ (TAIL) | ||
| 3 | ISG B+ | 23 | Sensor ground REF (+5V) | ||
| 4 | Mode control actuator (Vent) | 24 | C_CAN High | ||
| 5 | Mode control actuator (Def) | 25 | C_CAN Low | ||
| 6 | Mode control actuator (Feedback) | 26 | HTD (Rear defog indicator) | ||
| 7 | Intake actuator (Fresh) | 27 | - | ||
| 8 | Intake actuator (Recirculation) | 28 | - | ||
| 9 | Intake actuator (Feedback) | 29 | Passenger's temperature control actuator (Cool) | ||
| 10 | Defogging actuator (On) | 30 | Passenger's temperature control actuator (Warm) | ||
| 11 | Defogging actuator (Off) | 31 | Passenger's temperature control actuator (Feedback) | ||
| 12 | Defogging actuator (Feedback) | 32 | PTC Relay 2 | ||
| 13 | Rear defog switch | 33 | PTC Relay 3 | ||
| 14 | Hazard switch | 34 | PTC on signal | ||
| 15 | Driver's temperature control actuator (Cool) | 35 | Detent out (-) | ||
| 16 | Driver'st emperature control actuator (Warm) | 36 | - | ||
| 17 | Driver's temperature control actuator (Feedback) | 37 | ECV + | ||
| 18 | - | 38 | ECV - (Ground) | ||
| 19 | Sensor ground | 39 | ILL- (RHEO) | ||
| 20 | Ground | 40 | Ground |
| Connector | Pin NO | Function | Connector | Pin NO | Function |
| B | 1 | Blower motor (+) | B | 9 | PAB IGN1 |
| 2 | FET Drain (Feedback) | 10 | Clean signal | ||
| 3 | FET (Gate) | 11 | Ionizer diagnosis | ||
| 4 | SBR | 12 | AMB sensor (+) | ||
| 5 | Rear SBR (LH) | 13 | EVAP sensor (+) | ||
| 6 | Rear SBR (Center) | 14 | Auto defogging sensor signal | ||
| 7 | Rear SBR (RH) | 15 | Photo sensor (-)_LH | ||
| 8 | PAB Off signal | 16 | Photo sensor (-)_RH |
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 ...
Heater & A/C Control Unit (DATC) Repair procedures
Self Diagnosis
1.
Self-diagnosis process.
•
When operating the self-diagnostics, the below fault
(self-diagnostics code) will blink at 0.5 seconds interval on the
t ...
Other information:
Hyundai Elantra AD (2016-2020) Owners Manual: Rear seat warmers
While the engine is running, push either of the switches to warm the rear seat.
During mild weather or under conditions where the operation of the seat warmer
is not needed, keep the switches in the OFF position.
Each time you push the switch, the temperature setting of the seat is changed
a ...
Hyundai Elantra AD (2016-2020) Service Manual: CVVT Oil Control Valve (OCV) Description and Operation
Description
Continuous Variable Valve Timing (CVVT) system advances or
retards the valve timing of the intake and exhaust valve in accordance
with the ECM control signal which is calculated by the engine speed and
load.
By controlling CVVT, the valve over-lap or under-lap occurs,
which m ...
