Hyundai Tucson: Controller / Heater Control Unit
1. Heater control unit
| Pin No | Connector A | Connector B |
| 1 | Driver's mode control actuator feedback | Sensor ground |
| 2 | Intake actuator feedback | ECV (-) |
| 3 | Passenger's temperature control actuator feedback | ECV (+) |
| 4 | Driver's temperature control actuator feedback | - |
| 5 | Auto defogging actuator feedback | - |
| 6 | - | FET DRAIN feedback |
| 7 | - | Blower motor (+) |
| 8 | Photo sensor (-) LEFT | Blower INH |
| 9 | Photo sensor (-) RIGHT | Blower IS |
| 10 | - | Blower PWM IN |
| 11 | DEFOG DATA | - |
| 12 | DEFOG SCK | - |
| 13 | DEFOT TEMP | Sensor (+ 5V) |
| 14 | Ambient temperature sensor (+) | FET (GATE) |
| 15 | Evaporator sensor (+) | - |
| 16 | - | Battery (+) |
| 17 | - | Ground |
| 18 | - | - |
| 19 | - | - |
| 20 | - | - |
| 21 | Driver's mode control actuator (Vent) | - |
| 22 | Driver's mode control actuator (DEF) | - |
| 23 | Intake actuator (FRE) | - |
| 24 | Intake actuator (REC) | - |
| 25 | Passenger's temperature control actuator (Cool) | IBU ACTIVE (Low) |
| 26 | Passenger's temperature control actuator (Warm) | - |
| 27 | Driver's temperature control actuator (Cool) | - |
| 28 | Driver's temperature control actuator (Warm) | - |
| 29 | Auto defogging actuator (Open) | Blower relay |
| 30 | Auto defogging actuator (Close) | LIN |
| 31 | - | IGN1 |
| 32 | - | IGN2 |
| 33 | PTC relay1 or 2 | |
| 34 | CAN FD (Low) | |
| 35 | CAN FD (High) | |
| 36 | - | |
| 37 | LOCAL CAN (High) | |
| 38 | LOCAL CAN (Low) | |
| 39 | PTC ON signal | |
| 40 | Ground |
1.Disconnect the battery (-) terminal.
2.Remove the glove box.(Refer to Body (Interior and Exterior) - "Glove Box")
3.Press the lock pin (B) and then remove the crash pad under cover (A).
4.Disconnect the blower motor connector (A).
5.Remove the heater control unit (A), after removing the screws.
6.Disconnect the heater control unit connector.
7.Install in the reverse order of removal.
• Make sure the connector is connected properly.
Heater & A/C Control Unit (DATC)
- Components
Connector Pin Function
Pin NoConnector A
1Battery (+)
2IGN2
3IGN1
4Local CAN (High)
5Local CAN (Low)
6In-car sensor (+)
7-
8Sensor ground
9ISG B+
10ILL+ (TAIL)
11-
12- ...
Other information:
Hyundai Tucson (NX4) 2022-2025 Owner's Manual: Fuel gauge
This gauge indicates the approximate
amount of fuel remaining in the fuel tank.
Information
The fuel tank capacity is given in
Chapter 10.
The fuel gauge is supplemented by a
low fuel warning light, that illuminates
when the fuel tank is nearly empty.
On inclines or curves, the ...
Hyundai Tucson (NX4) 2022-2025 Service Manual: Description and Operation
- Description
The ignition coil is a kind of small transformer that transforms the
battery voltage to 30 kV or more to create a spark in the spark plug gap
in the cylinder.The igniter embedded in the ignition coil includes the
power transistor and it is an electronic switch whose electric c ...
